Touch input device

Abstract

The touch input device according to an embodiment is characterized by comprising: a touch sensor including a plurality of driving electrodes, a plurality of receiving electrodes forming mutual capacitance with the plurality of driving electrodes and a plurality of receiving dummy electrodes not forming mutual capacitance with the plurality of driving electrodes, and a touch detection unit including a plurality of receivers consisting of a plurality of first terminals receiving a plurality of first sensing signals and a plurality of second terminals receiving a plurality of second sensing signals, wherein the touch detection unit detects touch input of an object by subtracting at least one second sensing signal output through at least one first terminal of at least one receiver from at least one first sensing signal output through at least one first terminal of at least one receiver, wherein the at least one first sensing signal is formed between the at least one driving electrode and the at least one receiving electrode, and the at least one second sensing signal is formed between the at least one driving electrode and the at least one receiving dummy electrode.

Description

Technical Field

[0001] This invention relates to a touch input device, and more particularly to a touch input device including a touch sensor that can accurately detect whether or not an object touches the touch surface and / or the touch location even when the touch input device is in a state affected by LGM (low ground mass). Background Technology

[0002] Various input devices are used to operate computing systems. These include buttons, keys, joysticks, and touchscreens. Touchscreens are increasingly used for operating computing systems due to their simplicity and ease of use.

[0003] A touchscreen can constitute the touch surface of a touch input device, including a touch sensor panel, which can be a transparent plate with a touch-sensitive surface. This touch sensor panel is attached to the front of the display screen, and the touch-sensitive surface can cover the visible surface of the display screen. Users can operate the computing system simply by touching the touchscreen with their fingers. Typically, the computing system can recognize the touch and its location on the touchscreen, analyze the touch, and then perform corresponding calculations.

[0004] In addition, existing touchscreens use a differential circuit to subtract the sensing signals sensed from multiple receiving electrodes. In this case, when signals enter from two channels simultaneously, the signals cancel each other out, causing sensing errors.

[0005] Furthermore, in existing methods, the frequencies of the drive signals used to drive the display and the drive signals used to drive the touchscreen are sometimes synchronized to reduce noise. However, this presents a problem: touch sensing accuracy decreases when noise is present in the frequency band, necessitating a change in the drive signal frequency. However, due to the breakdown of signal frequency synchronization, the frequency cannot be changed, thus failing to improve accuracy.

[0006] To improve touch sensing accuracy, it is necessary to research and develop technical solutions that can address the difficulty in changing the frequency when using differential driving methods with synchronized signals, as well as the problem of errors caused by the mutual cancellation of two sensing signals used for touch sensing.

[0007] Furthermore, when touching a touch input device equipped with a touch sensor, there is a possibility of being affected by low ground mass (LGM) due to the floating position. For example, sometimes a signal that should be normally sensed disappears or a signal that should be sensed is separated, resulting in a phenomenon that appears as if there is a touch in more than one place.

[0008] In particular, it is known that the phenomenon is more severe when the device is touched while it is folded outwards. Summary of the Invention

[0009] Technical issues

[0010] The present invention is made to solve the problems described above, and provides a touch sensor that enables the touch input device to sense touch signals in the same or similar way as in a non-LGM state, and a touch input device including the touch sensor.

[0011] In particular, the aim is to provide a touch input device that does not cause cancellation of sensing signals related to touch sensing, uses a signal that is not synchronized with the display driving signal as a touch driving signal, and is capable of frequency jumps when subjected to external noise.

[0012] Furthermore, a touch sensor capable of recognizing two or more multi-touches with high sensitivity is provided even when the touch input device is affected by an LGM, and a touch input device including the LGM is also provided.

[0013] Furthermore, the aim is to enable the acquisition of touch input information with the LGM interference signal removed even when the touch input device is folded outward and is held in a floating position.

[0014] Technical solution

[0015] A touch input device according to an embodiment includes a touch sensor comprising a plurality of driving electrodes, a plurality of receiving electrodes forming mutual capacitance with the plurality of driving electrodes, and a plurality of receiving dummy electrodes not forming mutual capacitance with the plurality of driving electrodes, and a touch detection unit comprising a plurality of receivers consisting of a plurality of first terminals receiving a plurality of first sensing signals and a plurality of second terminals receiving a plurality of second sensing signals. The touch detection unit detects touch input of an object by subtracting at least one second sensing signal output through at least one first terminal of at least one receiver from at least one first sensing signal output through at least one first terminal of at least one receiver. The at least one first sensing signal is formed between the at least one driving electrode and the at least one receiving electrode, and the at least one second sensing signal is formed between the at least one driving electrode and the at least one receiving dummy electrode.

[0016] The touch input device further includes a display module consisting of a first display area and a second display area. The touch sensor is formed in the display module. The touch sensor receives multiple touch inputs to the object in at least one of the first display area and the second display area. The touch detection unit is capable of detecting at least one of the multiple touch inputs.

[0017] It may also include a first main body portion supporting the first display area, a second main body portion supporting the second display area, and a hinge portion connecting the first main body portion and the second main body portion to form a variable-angle structure.

[0018] The touch detection unit is capable of detecting at least one of the plurality of touch inputs when the touch input device is in an outward folded state.

[0019] The plurality of touch inputs include a first touch input to the first display area and a plurality of second touch inputs to the second display area, and the touch detection unit is capable of detecting the first touch input.

[0020] The plurality of touch inputs are either a plurality of first touch inputs to the first display area or a plurality of second touch inputs to the second display area, and the touch detection unit is capable of detecting the plurality of first touch inputs or the plurality of second touch inputs.

[0021] The plurality of dummy receiving electrodes can be respectively configured inside each of the plurality of receiving electrodes.

[0022] The centers of the plurality of dummy receiving electrodes and the centers of the plurality of receiving electrodes may be the same.

[0023] The sum of the areas of the plurality of receiving dummy electrodes may be the same as the sum of the areas of the plurality of receiving electrodes.

[0024] The plurality of receiver dummy electrodes may be formed by removing a portion of the interior of the plurality of receiver electrodes.

[0025] The plurality of receiving electrodes are disposed between the plurality of driving electrodes and the plurality of receiving dummy electrodes, and the plurality of receiving electrodes may be grounded.

[0026] The layers on which the plurality of receiving electrodes and the plurality of receiving dummy electrodes are configured are not the same as the layers on which the plurality of driving electrodes are configured. The first region on which the plurality of driving electrodes and the plurality of receiving electrodes are stacked may be larger than the second region on which the plurality of driving electrodes and the plurality of receiving dummy electrodes are stacked.

[0027] The width of the first region may be greater than the width of the second region.

[0028] The at least one first sensing signal includes information about a reduction in the mutual capacitance caused by at least one of the coupling between the object and the at least one driving electrode and the coupling between the object and the at least one receiving electrode, and the at least one second sensing signal includes information about a reduction in the mutual capacitance caused by at least one of the coupling between the object and the at least one driving electrode and the coupling between the object and the at least one receiving dummy electrode.

[0029] The touch input device further includes a display panel. The touch detection unit includes a driving unit that applies a touch driving signal to the plurality of driving electrodes that is not synchronized with the display driving signal applied to drive the display panel. The driving unit applies a touch driving signal having a first frequency to the plurality of driving electrodes. When the noise value output by the plurality of receiving dummy electrodes exceeds a predetermined threshold, a touch driving signal with a second frequency that hops to the plurality of driving electrodes may be applied to the plurality of driving electrodes.

[0030] The at least one receiving electrode is configured adjacent to the at least one driving electrode, and the at least one receiving dummy electrode is configured at a predetermined distance from the at least one driving electrode. The at least one receiving dummy electrode and the at least one receiving electrode can be connected to different channels respectively.

[0031] A touch input device according to an embodiment includes a touch sensor comprising a plurality of receiving electrodes, a plurality of driving electrodes forming mutual capacitance with the plurality of receiving electrodes, and a plurality of driving dummy electrodes not forming mutual capacitance with the plurality of receiving electrodes; and a touch detection unit comprising a plurality of receivers consisting of a plurality of first terminals receiving a plurality of first sensing signals and a plurality of second terminals receiving a plurality of second sensing signals. The touch detection unit detects touch input from an object by subtracting at least one second sensing signal output from at least one first terminal of at least one receiver from at least one second terminal.

[0032] The at least one first sensing signal may be formed between at least one receiving electrode and at least one driving electrode, and the at least one second sensing signal may be formed between the at least one receiving electrode and at least one driving dummy electrode.

[0033] It also includes a display module consisting of a first display area and a second display area; the touch sensor is formed in the display module, the touch sensor receives multiple touch inputs to the object on at least one of the first display area and the second display area, and the touch detection unit can detect at least one of the multiple touch inputs.

[0034] The device includes a first main body supporting the first display area, a second main body supporting the second display area, and a hinge connecting the first main body and the second main body to form a variable-angle structure. The touch detection unit detects at least one of the plurality of touch inputs when the touch input device is in an outward-folded state. The plurality of touch inputs includes a first touch input to the first display area and a plurality of second touch inputs to the second display area. The touch detection unit can detect the first touch input.

[0035] The plurality of touch inputs are either a plurality of first touch inputs to the first display area or a plurality of second touch inputs to the second display area, and the touch detection unit is capable of detecting the plurality of first touch inputs or the plurality of second touch inputs.

[0036] The at least one first sensing signal includes information about a reduction in the mutual capacitance caused by at least one of the coupling between the object and the at least one driving electrode and the coupling between the object and the at least one receiving electrode, and the at least one second sensing signal may include information about a reduction in the mutual capacitance caused by at least one of the coupling between the object and the at least one driving dummy electrode and the coupling between the object and the at least one receiving electrode.

[0037] Technical effect

[0038] According to the present invention, the touch input device can sense touch signals in the same or similar way as in a non-LGM state when it is affected by the LGM.

[0039] Furthermore, even when the touch input device is affected by LGM, it can still recognize two or more touches with high sensitivity.

[0040] Furthermore, even when the touch input device is folded outwards and held in a floating position, touch input information with the LGM interference signal removed can still be obtained.

[0041] According to the present invention, since an asynchronous driving method is used, the frequency can be freely hopped even when subjected to external environmental noise or CMI noise, thereby fundamentally solving the problems of synchronous driving. Furthermore, since a differential circuit utilizing dummy electrodes is included, problems caused by signal cancellation can be eliminated at the source. Moreover, since the touch sensor can be driven at a frequency different from that of the external wireless charger, when interference is detected during wireless charging, the frequency can be hopped to drive the touch sensor at a frequency value different from the frequency of the touch drive signal. Attached Figure Description

[0042] Figure 1 and Figure 2 This is output data used to explain the principle of LGM interference signal generation in touch input devices;

[0043] Figure 3 and Figure 4 This is a schematic diagram illustrating the principle of generating an LGM interference signal when a touch input device with a touch sensor implemented as a 2-layer touch sensor is in a floating state;

[0044] Figure 5 An example of a touch sensor configured as a single layer is shown;

[0045] Figure 6 A magnified view of another example of a touch sensor formed as a single layer;

[0046] Figure 7 For object contact with Figure 6 The touch sensor shown represents the raw data output from the touch input device when it touches the touch surface of the touch input device.

[0047] Figure 8 A magnified view of another example of a touch sensor formed as a single layer;

[0048] Figure 9 For object contact with Figure 8 The structure of the touch sensor shown is the raw data when the touch input device is used;

[0049] Figure 10 For comparison Figure 6 and Figure 8 The graph shown represents the LGM performance of the touch sensor.

[0050] Figure 11 A magnified view of another example of a touch sensor formed as a single layer;

[0051] Figure 12 A magnified view of another example of a touch sensor formed as a single layer;

[0052] Figure 13 A conceptual diagram of a touch sensor included in a touch input device according to the present invention;

[0053] Figure 14 To be Figure 8 The diagram shown is a conceptual representation of a touch sensor.

[0054] Figure 15 For illustrative purposes Figure 8 A schematic diagram of an electrode used as a dummy receiving electrode among the multiple receiving electrodes of the touch sensor shown.

[0055] Figure 16 For having Figure 8 The raw data of the signal output by the touch input device of the touch sensor shown;

[0056] Figure 17 A conceptual diagram illustrating the idea of ​​a touch sensor for a bridge structure;

[0057] Figure 18 For application Figure 17 The diagram shown is a conceptual diagram of a touch sensor and a structural diagram of a touch sensor.

[0058] Figure 19 In order to be applicable Figure 17 The diagram shown is a conceptual diagram of a touch sensor and a structural diagram of a touch sensor.

[0059] Figure 20 When testing with a 15Φ conductive rod, Figure 6 The touch sensor shown outputs raw data in the gripping and floating states, respectively.

[0060] Figure 21 When testing with a 15Φ conductive rod, Figure 8 The touch sensor shown outputs raw data in the gripping and floating states, respectively.

[0061] Figure 22 When testing with a 20Φ conductive rod, Figure 6 The touch sensor shown outputs raw data in the gripping and floating states, respectively.

[0062] Figure 23 When testing with a 20Φ conductive rod, Figure 8 The touch sensor shown outputs raw data in the gripping and floating states, respectively.

[0063] Figure 24When testing with a human thumb, Figure 6 The touch sensor shown outputs raw data in the gripping and floating states, respectively.

[0064] Figure 25 When testing with a human thumb, Figure 8 The touch sensor shown outputs raw data in the gripping and floating states, respectively.

[0065] Figure 26 This demonstrates the problem that existing touch input devices cannot recognize multiple touches on multiple objects when in a floating state;

[0066] Figure 27 This is raw data used to illustrate the multi-touch recognition operation of the touch input device according to the present invention;

[0067] Figure 28 To address the issue of existing touch input devices failing to recognize a third touch when simultaneously performing cross-touch and third touch on the touch surface;

[0068] Figure 29 This is raw data used to illustrate the problem of recognizing cross touch and third touch using the touch input device according to the present invention;

[0069] Figure 30 A simplified schematic diagram illustrating the configuration of the touch input device according to the present invention;

[0070] Figure 31 This shows the synchronization and desynchronization states of the display drive signal and the touch drive signal;

[0071] Figure 32 A flowchart illustrating the frequency switching operation of the touch input device according to the present invention is provided.

[0072] Figure 33 This is a simplified schematic diagram of a smart device according to the present invention;

[0073] Figure 34 A schematic diagram of the intelligent device according to the present invention;

[0074] Figures 35 to 3 8. An example of a floating situation occurring during touch input on touch input device 1;

[0075] Figure 39 is a configuration diagram of the touch input device 1 according to an embodiment;

[0076] Figure 40 The configuration of the touch sensor 10 according to an embodiment is shown;

[0077] Figure 41 The configuration of the sensing unit 11 according to an embodiment is shown;

[0078] Figure 42 and Figure 43 The configuration of a touch sensor 10 arranged in a dual-layer configuration according to an embodiment is shown;

[0079] Figure 44 The configuration of a display module 151 according to an example embodiment is shown;

[0080] Figure 45 and Figure 46 This is a reference diagram used to illustrate the reason for the difference between the digital values ​​output in the floating state and the digital values ​​output in the normal state;

[0081] Figure 47 and Figure 48 The configuration of a touch sensor 10 disposed on the same layer according to an embodiment is shown;

[0082] Figures 49 and 50 are reference diagrams for illustrating the principle of LGM interference signal generation by touch sensor 10 on the same layer;

[0083] Figures 51 to 62 Various forms of a touch sensor 10 for removing LGM interference signals according to an example embodiment. Detailed Implementation

[0084] The invention will be specifically described below with reference to the accompanying drawings, which illustrate specific embodiments that enable the implementation of the invention. These specific embodiments will enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the invention, while different, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention. Furthermore, it should be understood that the position or arrangement of individual constituent elements within the disclosed embodiments may be varied without departing from the spirit and scope of the invention. Therefore, the following specific description is not intended to be limiting, and with regard to the scope of the invention, where appropriate, is limited to all scopes equivalent to the scope of the claims and the appended claims. Similar reference numerals in the drawings refer to the same or similar functions in various respects.

[0085] -First Implementation Method

[0086] The touch input device according to the present invention includes a touch sensor. The touch sensor includes a pattern of a predetermined shape, which may include a plurality of driving electrodes TX0 to TXn and a plurality of receiving electrodes RX0 to RXm. For the operation of the touch sensor, a touch driving unit may be included that applies driving signals to the plurality of driving electrodes TX0 to TXn, and a touch sensing unit that receives sensing signals from the plurality of receiving electrodes RX0 to RXm, including information on the amount of capacitance change as a result of touching a touch surface, to detect a touch and the touch position.

[0087] The multiple driving electrodes TX0 to TXn and the multiple receiving electrodes RX0 to RXm of the touch sensor can be arranged in an orthogonal array, but the present invention is not limited to this. The multiple driving electrodes TX0 to TXn and the multiple receiving electrodes RX0 to RXm can have any dimension and their application arrangement, such as diagonal, concentric circles, or three-dimensional random arrangement. Among them, n and m are positive integers and can have the same or different values, which can vary depending on the implementation method.

[0088] Multiple driving electrodes TX0 to TXn and multiple receiving electrodes RX0 to RXm may be arranged to intersect each other. The driving electrodes TX may include multiple driving electrodes TX0 to TXn extending along a first axis direction, and the receiving electrodes RX may include multiple receiving electrodes RX0 to RXm extending along a second axis direction intersecting the first axis direction.

[0089] Multiple driving electrodes TX0 to TXn and multiple receiving electrodes RX0 to RXm can be formed in different two layers. For example, they can be bar or diamond patterns. The layer with the multiple driving electrodes TX0 to TXn can be disposed on the layer with the multiple receiving electrodes RX0 to RXm, or vice versa. An insulating layer can be formed between the two layers to prevent short circuits between the multiple driving electrodes and the multiple receiving electrodes.

[0090] A touch sensor comprising multiple driving electrodes TX0 to TXn and multiple receiving electrodes RX0 to RXm can be disposed together with an upper / lower OCA between the cover layer and the display panel (add-on). Alternatively, the touch sensor can be directly disposed on top of the display panel (e.g., on top of the display panel's encapsulation layer) (on-cell). Another option is to dispose of the touch sensor within the display panel (e.g., between the display panel's encapsulation layer and the organic light-emitting layer) (in-cell).

[0091] The display panel can be either a rigid OLED panel or a flexible OLED panel. In the case of a rigid OLED panel, the encapsulation layer and TFT layer can be formed of glass. In the case of a flexible OLED panel, the encapsulation layer is formed of a thin film, and the TFT layer can be formed of a PI film. Additionally, the display panel can be either an OLED panel or an LCD panel.

[0092] The touch sensor can be added-on to the cover glass. Alternatively, it can be attached to the top of the cover glass in film form. The touch sensor can be formed on the color filter glass (on-cell) of the display panel. It can be formed on or below the color filter glass. The touch sensor can also be formed in the TFT array (in-cell). It can be formed on or below the TFT array. Furthermore, one of the driving electrode and the receiving electrode can be formed on the color filter glass of the display panel, while the other is formed on the TFT array.

[0093] Furthermore, the multiple driving electrodes TX0 to TXn and the multiple receiving electrodes RX0 to RXm can be formed from transparent conductive materials (e.g., ITO (Indium Tin Oxide) or ATO (Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is just an example; the driving electrodes TX and receiving electrodes RX can also be formed from other transparent or non-transparent conductive materials. For example, the driving electrodes TX and receiving electrodes RX can be configured to include at least one of silver ink, copper, nano silver, and carbon nanotubes (CNTs). Furthermore, the driving electrodes TX and receiving electrodes RX can be implemented using a metal mesh.

[0094] The touch driving unit can apply a driving signal to the driving electrodes TX0 to TXn. The touch sensing unit can receive a sensing signal containing information about the change in mutual capacitance Cm generated between the driving electrodes TX0 to TXn and the receiving electrodes RX0 to RXm via the receiving electrodes RX0 to RXm to detect whether a touch has occurred and the touch position. The sensing signal includes not only the signal of the driving signal applied to the driving electrode TX coupled to the mutual capacitance Cm generated between the driving electrode TX and the receiving electrode RX, but also a noise signal. The noise signal may include display noise information (e.g., Zebra noise), information about the amount of change caused by changes in the image displayed on the screen, and information about LGM interference signals generated in the floating state (e.g., negative capacitance change).

[0095] The touch sensing unit may be configured to include a receiver (not shown) connected to each receiving electrode RX0 to RXm via a switch. The switch is turned on during the time interval for sensing the signal at the receiving electrode RX, enabling the receiver to sense the sensing signal from the receiving electrode RX. The receiver may be configured to include an amplifier and a feedback capacitor connected between the negative (-) input and output of the amplifier, i.e., the feedback path. Here, the positive (+) input of the amplifier may be connected to ground. Furthermore, the receiver may also include a reset switch connected in parallel with the feedback capacitor. The reset switch can reset the current-to-voltage conversion performed by the receiver. The negative input of the amplifier may be connected to the receiving electrode RX, where a current signal including information about the capacitance Cm is received and integrated to convert it into a voltage. The touch sensing unit may further include an ADC (analog to digital converter) that converts the data integrated by the receiver into digital data values. The digital data can then be input to a processor (not shown) and processed to acquire touch information about the touch sensor. The touch sensing unit may be configured to include not only a receiver but also an ADC and a processor.

[0096] Additionally, a control unit may be included to control the touch input device according to the present invention as a whole. The control unit controls the operation of the touch driving unit and the touch sensing unit. For example, the control unit may generate a drive control signal and transmit it to the touch driving unit so that the drive signal is applied to a predetermined drive electrode TX at a predetermined time. Furthermore, the control unit may generate a sensing control signal and transmit it to the touch sensing unit so that the touch sensing unit receives a sensing signal from a predetermined receiving electrode RX at a predetermined time and performs a predetermined function.

[0097] The touch driving unit and the touch sensing unit can constitute a touch detection unit capable of detecting whether a touch is made to the touch sensor and the touch position. Furthermore, the touch detection unit can be implemented to also include a control unit. The touch detection unit can be integrated into a touch sensing integrated circuit (IC). The driving electrode TX and receiving electrode RX included in the touch sensor can be connected to the touch driving unit and touch sensing unit included in the touch sensing IC, for example, via conductive traces and / or conductive patterns printed on a circuit board. The touch sensing IC can be located on a circuit board with printed conductive patterns, such as a touch circuit board (hereinafter referred to as a touch PCB). According to an embodiment, the touch sensing IC can be disposed on a motherboard for operation of a touch input device.

[0098] As described above, a predetermined capacitance Cm is generated at each intersection of the driving electrode TX and the receiving electrode RX. The value of capacitance Cm changes when an object such as a finger, electronic pen, or stylus approaches or touches the touch sensor. Here, the capacitance can be mutual capacitance Cm. The touch sensing unit can sense whether or not a touch has occurred and / or the touch position by sensing this electrical characteristic. For example, it can sense whether or not a touch has occurred and / or the touch position on the surface of the touch sensor, which is composed of a two-dimensional plane formed by a first axis and a second axis.

[0099] Figure 1 and Figure 2 It is output data used to explain the principle of LGM interference signal generation in touch input devices.

[0100] Figure 1 To convert the sensing signals output from the receiving electrodes RX0 to RX33 into digital values ​​(or signal level values) when an object touches a specific part of the touch surface under normal conditions of gripping the touch input device, Figure 2 This illustrates data in which the sensing signals output by the receiving electrodes RX0 to RX33 are converted into digital values ​​(or signal level values) when an object contacts a specific portion of the touch surface while the touch input device is floating.

[0101] Depend on Figure 1 The data shows that, under normal circumstances, the area with relatively large numerical values ​​in the output is located in the central part. However, as... Figure 2 As shown, the digital value of the central portion in the floating state is completely different from... Figure 1 That is, Figure 2 The digital value in the central portion is quite low. In this case, the touch input device may misidentify a single touch (or a large touch) as not occurring, even when the user actually makes only one touch (or a large touch) on the touch surface of the touch input device. This is due to the change in negative (-) capacitance caused by the LGM interference signal generated by the coupling between the object and the driving electrode.

[0102] like Figure 1 The normal scenario shown is when a user grips the touch input device and touches the touch surface with their finger, where the finger serves as a proper grounding point. Furthermore, as... Figure 2 The floating state example shown illustrates a situation where the touch input device is positioned on the ground or on a bracket (e.g., a bracket inside a car) and the user touches the touch surface of the touch input device with their finger, thus preventing the finger from functioning properly in a grounded state.

[0103] Figures 3 to 5 This is a diagram illustrating the reason for the difference between the digital value (or signal level) output in the floating state and the digital value (or signal level) output in the normal state.

[0104] Figure 3 and Figure 4 This is a schematic diagram illustrating the principle of generating an LGM interference signal when a touch input device with a touch sensor implemented as a 2-layer touch sensor is in a floating state.

[0105] See Figure 3 and Figure 4 In any given cell region (including the multiple driving electrodes and multiple receiving electrodes contained within the dashed area), the amount of signal sensed under low ground mass (LGM) conditions (hereinafter referred to as 'LGM interference signal') increases relatively. Therefore, as Figure 2 As shown, the final output sensing signal and corresponding digital value decrease. In particular, in the case of a large touch (defined in this invention as a case where the touch area, like that of the thumb, is larger than that of the other fingers), the LGM interference signal increases relatively.

[0106] like Figure 3 and Figure 4 As shown, the LGM interference signal occurs when the object touches the touch surface of the floating touch input device, in addition to generating the mutual capacitance ΔCm between the driving electrode and the receiving electrode, a coupling capacitance (C1, C2 or CLGM) is also generated between the object and the driving electrode Tx and / or the receiving electrode Rx.

[0107] Figure 5 This is a schematic diagram illustrating an example of a touch sensor configured as a single layer. See also Figure 5 Multiple driving electrodes TX0 to TXm and multiple receiving electrodes RX0 to RXm are formed in one layer. For example, a group of multiple driving electrodes Tx adjacent to a rectangular receiving electrode Rx can be arranged along multiple row and column directions. The number of driving electrodes Tx adjacent to a rectangular receiving electrode Rx can be four, as shown in the figure, but is not limited to this. For example, the number of driving electrodes Tx can be three, two, or more than five. Furthermore, the driving electrodes Tx and the receiving electrodes Rx can be configured in opposite directions.

[0108] Possessing such as Figure 5 The touch input device of the single-layer structure touch sensor shown also varies depending on the gripping state and the floating state, such as Figure 1 and Figure 2 Different situations may occur. This is because the object is in a low ground quality (LGM) state when floating.

[0109] More specifically, a drive signal applied through a specific drive electrode is input to multiple receiving electrodes RX in contact with the object in the LGM state. That is, the object in the LGM state forms a current path. Therefore, an LGM interference signal (-diff) with the opposite sign to the normal touch signal is output from each receiving electrode in contact with the object. The reason why the LGM interference signal has the opposite sign to the normal touch signal is that the mutual capacitance Cm decreases when the object is in contact with the object in the state where a predetermined mutual capacitance Cm is formed between the drive electrode and the receiving electrode, but the LGM interference signal has the opposite sign because the coupling capacitance is generated due to the object being in contact in the floating state. Therefore, the LGM interference signal generated in the floating state reduces the digital value (or signal level) of the sensing signal output through each receiving electrode.

[0110] The following describes a more specific example of a single-layer touch sensor and the raw data output by a touch input device with each touch sensor in a floating state.

[0111] Figure 6 This is a schematic diagram showing only a portion of another example where the touch sensor is formed as a single layer. See also Figure 6 The touch sensor includes multiple driving electrodes (TX) and multiple receiving electrodes (RX). The multiple driving electrodes (TX) and multiple receiving electrodes (RX) are arranged in a matrix on the same layer.

[0112] Multiple driving electrodes TX and multiple receiving electrodes RX can be formed from transparent conductive materials (e.g., ITO (Indium Tin Oxide) or ATO (Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is just an example; the driving electrodes TX and receiving electrodes RX can also be formed from other transparent conductive materials or non-transparent conductive materials. For example, the driving electrodes TX and receiving electrodes RX can be configured to include at least one of silver ink, copper, silver nanoparticles, and carbon nanotubes (CNTs).

[0113] Furthermore, the driving electrode TX and the receiving electrode RX can be implemented using a metal mesh. When the driving electrode TX and the receiving electrode RX are implemented using a metal mesh, the wiring connected to them can also be implemented using a metal mesh, and the driving electrode TX, the receiving electrode RX, and the wiring can be integrated into a single metal mesh. When the driving electrode TX, the receiving electrode RX, and the wiring are integrated into a single metal mesh, the dead zone (where touch positions cannot be sensed) between the electrodes and the wiring, and / or between the electrodes and other electrodes, is reduced, thus further improving the sensitivity of touch position detection.

[0114] The touch sensor is arranged with multiple receiving electrodes RX as a reference. Therefore, the arrangement of multiple receiving electrodes RX in columns B1 to B8 will be described first, followed by the arrangement of multiple driving electrodes TX.

[0115] Multiple columns B1, B2, B3, B4, B5, B6, B7, and B8 each have multiple receiving electrodes RX. Among them, multiple columns A1, A2, A3, A4, A5, A6, A7, A8, and A9, which are formed between each column of the multiple columns B1, B2, B3, B4, B5, B6, B7, and B8 where the receiving electrodes RX are arranged, outside the first column B1, and outside the eighth column B8, each have multiple driving electrodes TX.

[0116] Taking each of the multiple receiving electrodes RX as a reference, the two driving electrodes TX adjacent to each other on both sides are identical. That is, the two driving electrodes TX adjacent to each other on both sides are numbered the same. Here, "two driving electrodes TX identical" or "two driving electrodes TX numbered the same" means that they are electrically connected to each other through wiring.

[0117] A touch sensor includes one or more sets of multiple receiving electrodes RX and multiple driving electrodes TX configured in a predetermined arrangement. Multiple sets can be arranged repeatedly along a column direction.

[0118] A set may include multiple different receiving electrodes Rx. For example, a set may include 16 receiving electrodes, from receiving electrode 0 (RX0) to receiving electrode 15 (RX15). These 16 receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7, RX8, RX9, RX10, RX11, RX12, RX13, RX14, and RX15 can be arranged in a predetermined configuration. The 16 receiving electrodes RX0 to RX15 are arranged separately in two consecutive rows along the column direction. Therefore, eight receiving electrodes can be configured in each row. In the first row, receiving electrodes numbered 0 to 7 are arranged from left to right in the order RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7. In the second row, receiving electrodes numbered 8 to 15 are arranged from left to right in the order RX15, RX14, RX13, RX12, RX11, RX10, RX9, RX8.

[0119] Additionally, the touch sensor includes multiple driving electrodes TX, for example, the multiple driving electrodes TX may include a 0th driving electrode TX0 to a third driving electrode TX3. Each driving electrode may be configured to satisfy the following arrangement conditions.

[0120] Multiple driving electrodes TX are arranged to satisfy the following conditions: 1) A driving electrode TX0 is configured on the left and right sides respectively, based on two different receiving electrodes RX0 and RX15 that are consecutive along the column direction. 2) Two driving electrodes TX0 and TX15 that are opposite each other based on two different receiving electrodes RX0 and RX15 that are consecutive along the column direction have the same number. 3) The driving electrodes TX arranged along the column direction have different numbers, and the driving electrodes TX arranged along the row direction have the same number. 5) The length (lateral length) of the driving electrodes arranged on both sides of each group can be half the length (lateral length) of the other driving electrodes, but is not limited to this, and the length can also be the same.

[0121] Figure 7 For object contact with Figure 6 The structure of the touch sensor shown is used to output raw data when a specific part of the touch input device touches the surface.

[0122] Specifically, Figure 7 (a) is having Figure 6 The touch sensor structure shown represents the raw data output by the touch input device when it is in a grasping state. Figure 7 (b) is having Figure 6 The touch input device shown has a structure that outputs raw data when it is in a floating state.

[0123] Figure 7The raw data shown can be derived through the following remapping process. When drive signals are sequentially applied to multiple drive electrodes of the touch sensor, a predetermined sensing signal is output from each of the multiple receiving electrodes. The touch sensing unit converts the output sensing signal into a digital value (or signal level value) corresponding to that sensing signal and outputs it. Furthermore, the touch sensing unit maps the output digital value so that it corresponds to a position on the touch surface of the touch input device. This mapping process can be used to output... Figure 7 The original data.

[0124] Figure 7 If the number recorded in the original data can be represented by an integer, and the integer is greater than or equal to a preset reference integer value (e.g., +65), the touch detection unit of the touch input device can determine (or identify) that the object has touched the part where the number is located.

[0125] See Figure 7 In (a), under the grasping state (normal condition), the distribution of the original data shows that the data values ​​in the middle part have larger integer values ​​compared to the other parts. Conversely, see [reference needed]. Figure 7 (b) The case where the digital value recorded in the intermediate portion in the floating state is different from that in (b). Figure 7 (a). Specifically, the intermediate portion as a whole has a relative... Figure 7 (a) Relatively low integer values, or even a portion of the middle section having negative (-) values. This stems from the LGM interference signal that occurs in the floating state. As a result, the touch input device may misidentify the middle section as two touches instead of one touch, or it may misidentify the middle section as having no touch at all.

[0126] Figure 8 This is another example of a touch sensor formed as a single layer, shown as a partially enlarged schematic diagram. See also... Figure 8 The touch sensor includes multiple driving electrodes (TX) and multiple receiving electrodes (RX). The multiple driving electrodes (TX) and multiple receiving electrodes (RX) are arranged in a matrix on the same layer.

[0127] Multiple driving electrodes TX and multiple receiving electrodes RX can be formed from transparent conductive materials (e.g., ITO (Indium Tin Oxide) or ATO (Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is just an example; the driving electrodes TX and receiving electrodes RX can also be formed from other transparent conductive materials or non-transparent conductive materials. For example, the driving electrodes TX and receiving electrodes RX can be configured to include at least one of silver ink, copper, silver nanoparticles, and carbon nanotubes (CNTs).

[0128] Furthermore, the driving electrode TX and the receiving electrode RX can be implemented using a metal mesh. When the driving electrode TX and the receiving electrode RX are implemented using a metal mesh, the wiring connected to them can also be implemented using a metal mesh, and the driving electrode TX, the receiving electrode RX, and the wiring can be integrated into a single metal mesh. When the driving electrode TX, the receiving electrode RX, and the wiring are integrated into a single metal mesh, the dead zone (where touch positions cannot be sensed) between the electrodes and the wiring, and / or between the electrodes and other electrodes, is reduced, thus further improving the sensitivity of touch position detection.

[0129] The touch sensor is based on a plurality of receiving electrodes RX. Therefore, the arrangement of the plurality of receiving electrodes RX will be explained first, and then the arrangement of the plurality of driving electrodes TX will be explained.

[0130] Multiple receiving electrodes RX are arranged in multiple columns A1, A2, A3, A4, A5, A6, A7, and A8. Among them, multiple driving electrodes TX are arranged in multiple columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, and B12, which are formed between each column of the multiple columns A1, A2, A3, A4, A5, A6, A7, and A8 where receiving electrodes RX are arranged, outside the first column A1, and outside the eighth column A8.

[0131] Taking each of the multiple receiving electrodes RX as a reference, the two driving electrodes TX adjacent to each other on both sides have the same characteristics. That is, the two driving electrodes TX adjacent to each other on both sides are numbered the same. Here, the two driving electrodes TX being the same or having the same number means that they are electrically connected to each other through wiring.

[0132] A touch sensor includes one or more sets consisting of multiple receiving electrodes RX and multiple driving electrodes TX arranged in a predetermined manner. Multiple sets can be arranged repeatedly along the row and column directions.

[0133] A set may include multiple different receiving electrodes Rx. For example, a set may include eight receiving electrodes, from RX0 (0th) to RX7 (7th). These eight receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 can be arranged in a predetermined configuration. The eight receiving electrodes RX0 to RX7 are arranged separately in four consecutive columns A1, A2, A3, and A4 along the row direction. Therefore, each of the four columns can have two receiving electrodes arranged from top to bottom.

[0134] Multiple receiving electrodes with consecutive numbers are arranged in each column. The order of the odd-numbered columns A1 and A3 can be the reverse of the order of the even-numbered columns A2 and A4. For example, in column A1, receiving electrodes RX0 and RX1 with consecutive numbers are arranged from top to bottom; in column A2, receiving electrodes RX2 and RX3 with consecutive numbers are arranged from bottom to top; in column A3, receiving electrodes RX4 and RX5 with consecutive numbers are arranged from top to bottom; and in column A4, receiving electrodes RX6 and RX7 with consecutive numbers are arranged from bottom to top. Although not illustrated in the figure, the different receiving electrodes within a group can be arranged arbitrarily, not necessarily sequentially along rows or columns.

[0135] Additionally, the touch sensor includes multiple driving electrodes TX, for example, the multiple driving electrodes TX may include driving electrode 0 TX0 to driving electrode 15 TX15. Each driving electrode may be configured to satisfy the following arrangement conditions.

[0136] Multiple driving electrodes TX are arranged to satisfy the following conditions: 1) Four different driving electrodes are arranged on the left side and four different driving electrodes are arranged on the right side, with a receiving electrode RX as the reference. 2) Two driving electrodes TX facing each other with each receiving electrode RX as the reference have the same number. 3) Three driving electrodes with the same number are arranged consecutively along the row direction. 4) The eight driving electrodes adjacent to the even-numbered row receiving electrode RX1 are arranged symmetrically with the eight driving electrodes adjacent to the odd-numbered row receiving electrode RX0. 5) The length (lateral length) of the driving electrodes arranged at the two edge positions of each group and the driving electrode arranged in the center of each group is half the length (lateral length) of the other driving electrodes.

[0137] Figure 9 For object contact with Figure 8The structure of the touch sensor shown represents the raw data generated when a specific portion of the touch surface of a touch input device is touched. Specifically, Figure 9 It has Figure 8 The raw data of the touch input device in the floating state, as shown in the structure of the touch sensor.

[0138] See Figure 9 It was confirmed that the digital value (or level value) output from a specific part in the floating state had a relatively large integer value compared to other parts. This was determined through comparison. Figure 9 The original data shown and Figure 7 As shown in (b) of the original data, it can be seen that in the floating state, as Figure 8 The structure of the touch sensor shown is compared to that of... Figure 6 The structure of the touch sensor shown has an improved LGM effect.

[0139] Figure 10 For a rough comparison Figure 6 and Figure 8 The graph shows the LGM performance of the touch sensor. See also... Figure 10 ,like Figure 6 The touch sensor shown has a relatively large level value of approximately +250 in the touch area when gripped, and a relatively large level value between -2100 and +2100 when floating.

[0140] In addition, such as Figure 8 The touch sensor shown has a relatively large level value of approximately +250 in the touch area when gripped, and a relatively large level value between +70 and +170 when floating.

[0141] According to Figure 10 The coordinate graph is used for judgment, and it has the following characteristics: Figure 6 When the touch sensor shown is in a floating state, it is difficult to accurately identify whether a touch has occurred and the location of the touch, while having features such as... Figure 8 The touch sensor shown has a relatively large touch input device with a voltage level of +70 or higher even in the floating state, so it has no problem recognizing whether a touch is present and the touch location. However, for the touch input device to accurately recognize whether a touch is present and / or the touch location, it is extremely important that it outputs a relatively large voltage level (+250) in the floating state, or similar to the relatively large voltage level (+250) in the gripping state.

[0142] The following description, with reference to the accompanying drawings, details a touch sensor and a touch input device including the touch sensor that enables a touch input device having a single-layer (1-layer) and a double-layer (2-layer) touch sensor to output a signal level value in a floating state that is the same as or similar to the signal level value output in a grasping state (Floating (final data)).

[0143] The method described below is applicable to all known touch sensor structures and touch input devices including them. Furthermore, although not specifically illustrated, in a dual-layer touch sensor, one of the multiple driving electrodes and multiple receiving electrodes can be configured between the touch surface and the display panel, while the other can be configured inside the display panel.

[0144] Furthermore, the embodiments described above are not limited to those described above; they can also be applied to other touch input devices with single-layer or double-layer touch sensors not shown in this specification.

[0145] Figure 11 The output touch sensor is formed as a single layer; the diagram shown is only a magnified portion. See also... Figure 11 It includes multiple driving electrodes TX and multiple receiving electrodes RX. The multiple driving electrodes TX and multiple receiving electrodes RX are arranged in a matrix.

[0146] The touch sensor is arranged with multiple driving electrodes TX as a reference. Therefore, the arrangement structure of multiple driving electrodes TX arranged in columns B1 to B16 will be described first, and then the arrangement structure of multiple receiving electrodes RX will be described.

[0147] Multiple columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16 each have multiple driving electrodes TX. Among them, multiple columns A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16, which are the columns with driving electrodes TX, are arranged between each column, outside the first column B1, and outside the sixteenth column B16.

[0148] Based on each of the multiple driving electrodes TX, two adjacent receiving electrodes RX have different characteristics. That is, based on each driving electrode TX, the two adjacent receiving electrodes RX are numbered differently. Here, "different receiving electrodes RX" or "different receiving electrodes RX" means they are not electrically connected to each other via wiring.

[0149] The plurality of driving electrodes TX includes a first group (set1) of 32 driving electrodes TX0 to TX31 arranged in a first arrangement, and a second group (set2) of 32 driving electrodes TX0 to TX31 arranged in a second arrangement.

[0150] Regarding the first group (set1), there can be two consecutive groups along the row direction and two groups along the column direction. The first group (set1) located in the even-numbered row can be symmetrical to the first group (set1) located in the odd-numbered row.

[0151] Regarding the second group (set2), there can be two consecutive groups along the row direction and two groups along the column direction. The second group (set2) located in the even-numbered row can be symmetrical to the second group (set2) located in the odd-numbered row.

[0152] Furthermore, multiple second groups can be configured on one side of multiple first groups.

[0153] The first arrangement of the first group (set1) consists of 32 driving electrodes, from TX0 to TX31 (number 0), arranged separately in four consecutive columns along the row direction. The driving electrodes numbered 0 to 7 are arranged from top to bottom in the first column in the order of TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. The driving electrodes numbered 8 to 15 are arranged from top to bottom in the second column in the order of TX15, TX14, TX13, TX12, TX11, TX10, TX9, TX8. The driving electrodes numbered 16 to 23 are arranged from top to bottom in the third column in the order of TX16, TX17, TX18, TX19, TX20, TX21, TX22, TX23. The driving electrodes numbered 24 to 31 are arranged from top to bottom in the fourth column in the order of TX31, TX30, TX29, TX28, TX27, TX26, TX25, TX24.

[0154] The second arrangement of the second group (set2) consists of 32 driving electrodes, from TX0 to TX31 (number 0), arranged separately in four consecutive columns along the row direction. Driving electrodes numbered 16 to 23 are arranged from top to bottom in the first column in the order of TX16, TX17, TX18, TX19, TX20, TX21, TX22, TX23. Driving electrodes numbered 24 to 31 are arranged from top to bottom in the second column in the order of TX31, TX30, TX29, TX28, TX27, TX26, TX25, TX24. Driving electrodes numbered 0 to 7 are arranged from top to bottom in the third column in the order of TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. Driving electrodes numbered 8 to 15 are arranged from top to bottom in the fourth column in the order of TX15, TX14, TX13, TX12, TX11, TX10, TX9, TX8.

[0155] Additionally, the touch sensor according to the embodiment includes a plurality of receiving electrodes RX, for example, the plurality of receiving electrodes RX may include a 0th receiving electrode RX0 to a 15th receiving electrode RX15. Each receiving electrode may be configured to satisfy the following arrangement conditions.

[0156] Multiple receiving electrodes RX are arranged to satisfy the following conditions: 1) Based on eight different driving electrodes TX consecutively along the column direction, one receiving electrode is arranged on the left and one receiving electrode is arranged on the right. 2) Two receiving electrodes RX opposite each other based on eight different driving electrodes TX consecutively along the column direction have different numbers. 3) Two different receiving electrodes RX are arranged along the column direction, and eight different receiving electrodes RX are arranged repeatedly along the row direction. 5) The length (lateral length) of the receiving electrodes arranged along the column direction at the two side edge positions can be the same as the length (lateral length) of other receiving electrodes, but is not limited to this, and can also be half the length (lateral length) of other receiving electrodes.

[0157] Figure 12 This is another example of a touch sensor formed as a single layer, shown as a partially enlarged schematic diagram. See also... Figure 12 The touch sensor includes multiple driving electrodes (TX) and multiple receiving electrodes (RX). The multiple driving electrodes (TX) and multiple receiving electrodes (RX) are arranged in a matrix.

[0158] The touch sensor according to the embodiment is arranged with a plurality of driving electrodes TX as a reference. Therefore, the arrangement structure of multiple driving electrodes TX configured in columns B1 to B16 will be described first, and then the arrangement structure of multiple receiving electrodes RX will be described.

[0159] Multiple columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16 each have multiple driving electrodes TX. Among them, multiple columns A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16, which are the columns with driving electrodes TX, are arranged between each column, outside the first column B1, and outside the sixteenth column B16.

[0160] Based on each of the multiple driving electrodes TX, two adjacent receiving electrodes RX have different characteristics. That is, the two adjacent receiving electrodes RX are numbered differently based on each driving electrode TX. Here, the difference between the two receiving electrodes RX or their different numbering means that they are not electrically connected to each other via wiring.

[0161] The multiple driving electrodes TX include 32 sets, from driving electrode 0 TX0 to driving electrode 31 TX31, arranged in a first arrangement. Multiple sets can be repeated along both row and column directions. The sets located in even-numbered rows can be symmetrical to the sets located in odd-numbered rows.

[0162] The first arrangement of each set consists of 32 driving electrodes, from TX0 (0th) to TX31 (31st), arranged in four consecutive columns along the row direction. Driving electrodes numbered 0 to 7 are arranged from top to bottom in the first column in the order of TX0, TX1, TX2, TX3, TX4, TX5, TX6, TX7. Driving electrodes numbered 8 to 15 are arranged from top to bottom in the second column in the order of TX15, TX14, TX13, TX12, TX11, TX10, TX9, TX8. Driving electrodes numbered 16 to 23 are arranged from top to bottom in the third column in the order of TX16, TX17, TX18, TX19, TX20, TX21, TX22, TX23. Driving electrodes numbered 24 to 31 are arranged from top to bottom in the fourth column in the order of TX31, TX30, TX29, TX28, TX27, TX26, TX25, TX24.

[0163] Additionally, the touch sensor according to the embodiment includes a plurality of receiving electrodes RX, for example, the plurality of receiving electrodes RX may include a 0th receiving electrode RX0 to a 31st receiving electrode RX31. Each receiving electrode may be configured to satisfy the following arrangement conditions.

[0164] Multiple receiving electrodes RX are arranged to satisfy the following conditions: 1) Based on eight consecutive different driving electrodes TX along the column direction, one receiving electrode is arranged on the left and one receiving electrode is arranged on the right. 2) Two receiving electrodes RX facing each other, based on eight consecutive different driving electrodes TX along the column direction, have different numbers. 3) Two different receiving electrodes are arranged along the column direction, and 16 different receiving electrodes are repeatedly arranged along the row direction. 4) The length (lateral length) of the receiving electrodes arranged along the column direction at the two edge positions can be the same as the length (lateral length) of the other receiving electrodes, but is not limited to this; it can be half the length (lateral length) of the other receiving electrodes.

[0165] Figure 13 An exemplary conceptual diagram illustrating a touch sensor provided in a touch input device according to the present invention. See also Figure 13 The touch sensor according to an embodiment of the present invention includes a plurality of driving electrodes TX0 to TX7 and a plurality of receiving electrodes RX0 to RX7. The plurality of driving electrodes TX0 to TX7 and the plurality of receiving electrodes RX0 to RX7 may be formed in a single layer or in a double layer.

[0166] A touch sensor according to an embodiment of the present invention includes multiple driving electrodes TX0 to TX7 and multiple receiving electrodes RX0 to RX7, comprising nodes with mutual capacitance Cm formed between the multiple driving electrodes TX0 to TX7 and the multiple receiving electrodes RX0 to RX7, and nodes without mutual capacitance Cm formed.

[0167] For example, Figure 13 The nodes that form mutual capacitance Cm are (Tx0, Rx0), (Tx0, Rx1), (Tx0, Rx2), (Tx0, Rx3), (Tx1, Rx4), (Tx1, Rx5), (Tx1, Rx6), (Tx1, Rx7), (Tx2, Rx0), (Tx2, Rx1), (Tx2, Rx2), (Tx2, Rx3), (Tx3, Rx4), (Tx3, Rx5), (Tx3, Rx6), ( Tx3, Rx7), (Tx4, ​​Rx0), (Tx4, ​​Rx1), (Tx4, ​​Rx2), (Tx4, ​​Rx3), (Tx5, Rx4), (Tx5, Rx5), (Tx5, Rx6), (Tx5, Rx7), (Tx6, Rx0), (Tx6, Rx1), (Tx6, Rx2), (Tx6, Rx3), (Tx7, Rx4), (Tx7, Rx5), (Tx7, Rx6), (Tx7, Rx7).

[0168] Each receiving electrode Rx of the node that forms the mutual capacitance Cm can be named the active receiving electrode (ActiveRx).

[0169] The sensing signals output from each receiving electrode Rx of the node forming the mutual capacitance Cm contain not only information about the amount of capacitance change caused by object touch, but also noise information. This noise information includes display noise (e.g., Zebra noise), information about the amount of change in the image displayed on the display panel, and information about the amount of negative (-) capacitance change caused by LGM interference signals occurring in the floating state. Therefore, when the sensing signals received from each receiving electrode Rx of the node forming the mutual capacitance Cm are converted into a predetermined level value for output, the output level value reflects both the mutual capacitance change information and the aforementioned noise information.

[0170] in addition, Figure 13 The nodes that do not form mutual capacitance Cm are (Tx0, Rx4), (Tx0, Rx5), (Tx0, Rx6), (Tx0, Rx7), (Tx1, Rx0), (Tx1, Rx1), (Tx1, Rx2), (Tx1, Rx3), (Tx2, Rx4), (Tx2, Rx5), (Tx2, Rx6), (Tx2, Rx7), (Tx3, Rx0), (Tx3, Rx1), and (Tx3, Rx2). (Tx3, Rx3), (Tx4, ​​Rx4), (Tx4, ​​Rx5), (Tx4, ​​Rx6), (Tx4, ​​Rx7), (Tx5, Rx0), (Tx5, Rx1), (Tx5, Rx2), (Tx5, Rx3), (Tx6, Rx4), (Tx6, Rx5), (Tx6, Rx6), (Tx6, Rx7), (Tx7, Rx0), (Tx7, Rx1), (Tx7, Rx2), (Tx7, Rx3).

[0171] Each receiving electrode Rx of a node that does not form a mutual capacitance Cm can be named a dummy electrode or a dummy receiving electrode. A dummy receiving electrode can be a configuration within a touch sensor that is independent of multiple receiving electrodes, or it can be a subset of multiple receiving electrodes that is used as a dummy receiving electrode under specific conditions.

[0172] The sensing signals output from each receiving electrode Rx of a node that does not form mutual capacitance Cm do not contain information about the amount of capacitance change caused by object touch; they only contain noise information.

[0173] Therefore, a touch input device according to an embodiment of the present invention, having such a touch sensor, can obtain information about the amount of capacitance change caused by object touch by subtracting the sensing signals (second sensing signals) output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm from the sensing signals (first sensing signals) output from the receiving electrodes Rx of nodes forming mutual capacitance Cm to remove the noise information. Thus, the digital value (or signal level value) corresponding to the final sensing signal obtained by subtracting the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm from the sensing signals output from the receiving electrodes Rx of nodes forming mutual capacitance Cm becomes a value based on information about the amount of capacitance change caused by object touch. As a result, even when the touch input device is in a floating state, it can output a digital value that is the same as or nearly similar to the digital value output in a gripping state.

[0174] More preferably, the touch input device according to an embodiment of the present invention may also subtract the product of the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm (second sensing signals) and a preset factor from the sensing signals output from the receiving electrodes Rx of the nodes forming mutual capacitance Cm (first sensing signals). Multiplying the second sensing signal by the factor is to compensate for possible variations in the magnitude of the sensing signal due to differences in the configuration of the active channel and the dummy channel. For example, the factor may be a preset value such as 0.8, but is not limited thereto, and the value of the factor may vary depending on the design.

[0175] See below Figures 14 to 20 Specific examples will be provided.

[0176] Figure 14 To be Figure 8 The diagram shown illustrates the conceptual design of a touch sensor. See also: Figure 14 The touch sensor according to an embodiment of the present invention includes a plurality of driving electrodes TX0 to TX7 and a plurality of receiving electrodes RX0 to RX7. At least a portion of the plurality of receiving electrodes RX0 to RX7 is used as a dummy receiving electrode. Which of the plurality of receiving electrodes RX0 to RX7 is used as a dummy receiving electrode depends on the driving electrode to which a driving signal is applied.

[0177] For example, when a drive signal is applied to the 0th drive electrode TX0, the 4th receiving electrode Rx4, the 5th receiving electrode Rx5, the 6th receiving electrode Rx6, and the 7th receiving electrode Rx7 among the plurality of receiving electrodes Rx0 to Rx7 are used as dummy receiving electrodes. In other words, when a drive signal is applied to the 0th drive electrode Tx0, the 4th, 5th, 6th, and 7th receiving electrodes Rx4, Rx5, Rx6, and Rx7 become receiving electrodes that do not form a mutual capacitance Cm with the 0th drive electrode Tx0, and the 0th, 1st, 2nd, and 3rd receiving electrodes Rx0, Rx1, Rx2, and Rx3 become receiving electrodes that form a mutual capacitance Cm with the 0th drive electrode Tx0.

[0178] If a driving signal is applied to the first driving electrode Tx1, then the 4th, 5th, 6th, and 7th receiving electrodes Rx4, Rx5, Rx6, and Rx7 become receiving electrodes that form a mutual capacitance Cm with the first driving electrode Tx1, and the 0th, 1st, 2nd, and 3rd receiving electrodes Rx0, Rx1, Rx2, and Rx3 become receiving electrodes that do not form a mutual capacitance Cm with the first driving electrode Tx1.

[0179] A touch input device according to an embodiment of the present invention, having such a touch sensor, subtracts the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm from the sensing signals output from the receiving electrodes Rx of nodes that form mutual capacitance Cm to remove noise information, particularly information about the amount of negative (-) capacitance change caused by LGM interference signals. Alternatively, the touch input device according to an embodiment of the present invention can also subtract the product of the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm and a predetermined factor from the sensing signals output from the receiving electrodes Rx of nodes that form mutual capacitance Cm.

[0180] Figure 15 For illustrative purposes Figure 8 An example diagram of an electrode used as a dummy receiving electrode among the multiple receiving electrodes of a touch sensor. See also... Figure 15 When a driving signal is applied to the first driving electrode Tx1, the 4th, 5th, 6th, and 7th receiving electrodes Rx4, Rx5, Rx6, and Rx7 become receiving electrodes (Active Rx) that form mutual capacitance Cm with the first driving electrode Tx1, and the 0th, 1st, 2nd, and 3rd receiving electrodes Rx0, Rx1, Rx2, and Rx3 become dummy receiving electrodes (Dummy Rx) that do not form mutual capacitance Cm with the first driving electrode Tx1.

[0181] The sensing signals output from the activated Rx (Rx4, Rx5, Rx6, Rx7) contain not only information about the capacitance change caused by object touch, but also noise information. This noise information includes display noise (e.g., Zebra noise), changes in the image displayed on the screen, and negative (-) capacitance changes caused by LGM interference signals occurring in the floating state. Therefore, when the sensing signals output from the activated Rx (Rx4, Rx5, Rx6, Rx7) are converted into a predetermined level value by the touch detection unit of the touch input device, the output level value reflects both the mutual capacitance change information and the aforementioned noise information. Conversely, the sensing signals output from the dummy Rx (Rx0, Rx1, Rx2, Rx3) contain almost no information about the capacitance change caused by object touch, only the aforementioned noise information.

[0182] Figure 16 To have Figure 8 An example diagram of the raw data output by the touch input device of the touch sensor shown. Figure 16 The original data shown in (a) is the same as Figure 9 The original data shown is the same. That is, Figure 9 The raw data shown is based on data from... Figure 8 The raw data of the sensing signals output by each receiving electrode (Active Rx) of the node forming the mutual capacitance Cm in the touch sensor shown. Figure 16 (b) is based on from Figure 8 The raw data of the sensing signals output by each receiving electrode (Dummy Rx) of the node that does not form mutual capacitance Cm in the touch sensor shown.

[0183] Figure 16 (c) is the raw data obtained by subtracting the sensing signals output from the receiving electrodes (Active Rx) of the nodes that do not form mutual capacitance Cm from the sensing signals output from the receiving electrodes (Dummy Rx) of the nodes that form mutual capacitance Cm.

[0184] After comparison Figure 16 The original data in (c) and (a) can confirm that from Figure 16 In the original data of (c), the digital value (or level value) within the touch area where the actual object was touched is relatively greater than Figure 16 The digital value (or level value) of the corresponding part of (a). That is, it can be confirmed that the central part of the touch area has a level value of approximately +250 or higher, thereby confirming that the touch input device can obtain the same or similar level value as the gripping state in the floating state.

[0185] Although no additional raw data is shown, the raw data is expected to be obtained by subtracting the sensing signals output from the receiving electrodes (Active Rx) of nodes that do not form mutual capacitance Cm from the sensing signals output from the receiving electrodes (Dummy Rx) of nodes that form mutual capacitance Cm, multiplied by a pre-set factor. Figure 16 (c) is similar.

[0186] Figure 17 A conceptual diagram illustrating a touch sensor design for a bridge-like structure. See also... Figure 17 The touch sensor includes multiple driving electrodes TX0 to TX7 and multiple receiving electrodes RX0 to RX3. Furthermore, the touch sensor includes multiple dummy receiving electrodes DRx0 to DRx3.

[0187] A mutual capacitance Cm is formed between the multiple driving electrodes TX0 to TX7 and the multiple receiving electrodes RX0 to RX3, but no mutual capacitance Cm is formed between the multiple driving electrodes TX0 to TX7 and the multiple dummy receiving electrodes DRx0 to DRx3. In reality, a weak mutual capacitance can be formed between the multiple driving electrodes TX0 to TX7 and the multiple dummy receiving electrodes DRx0 to DRx3, but this weak mutual capacitance can be ignored when detecting touch.

[0188] A touch input device according to an embodiment of the present invention, having such a touch sensor, can remove noise information, particularly information about the amount of negative (-) capacitance change caused by LGM interference signals, by subtracting the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm from the sensing signals output from the receiving electrodes Rx of nodes that form mutual capacitance Cm. Alternatively, the touch input device according to an embodiment of the present invention can also subtract the product of the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm and a predetermined factor from the sensing signals output from the receiving electrodes Rx of nodes that form mutual capacitance Cm.

[0189] Figure 18 In order to be applicable Figure 17 The diagram shown is a simplified schematic of an example of a touch sensor concept. See also: Figure 18 Multiple driving electrodes Tx0, Tx1, Tx2, and Tx3 are arranged in parallel along the horizontal direction, and multiple receiving electrodes Rx0 and Rx1 are arranged in parallel along the vertical direction.

[0190] Multiple driving electrodes Tx0, Tx1, Tx2, Tx3 and multiple receiving electrodes Rx0, Rx1 are each rhomboid in shape, and two adjacent driving electrodes and two adjacent receiving electrodes are electrically connected to each other through conductive connection parts.

[0191] Multiple driving electrodes Tx0, Tx1, Tx2, Tx3 and multiple receiving electrodes Rx0, Rx1 can be implemented using a metal mesh. The conductive connections connecting the multiple driving electrodes Tx0, Tx1, Tx2, Tx3 can also be implemented using a metal mesh. These conductive connections can be implemented using either a metal mesh or conductive traces.

[0192] Each of the multiple driving electrodes Tx0, Tx1, Tx2, Tx3 and the multiple receiving electrodes Rx0, Rx1 has an internally electrically insulating dummy pattern. The dummy pattern can be formed to reduce the fundamental capacitance of each receiving and driving electrode. The dummy pattern can be formed by disconnecting a portion of the internal metal mesh after the patterns of the driving and receiving electrodes are formed using a metal mesh.

[0193] Multiple dummy receiving electrodes DRx0 and DRx1 can be obtained by electrically connecting dummy patterns within multiple receiving electrodes Rx0 and Rx1. The multiple receiving electrodes Rx0 and Rx1 are very adjacent to the multiple driving electrodes Tx0, Tx1, Tx2, and Tx3, thus forming a mutual capacitance Cm. However, the multiple dummy receiving electrodes DRx0 and DRx1 are relatively far from the multiple driving electrodes Tx0, Tx1, Tx2, and Tx3, so the mutual capacitance Cm formed is so small that it can be almost ignored.

[0194] Figure 19 In order to be applicable Figure 17 The diagram shown is a conceptual diagram of a touch sensor, and another example of its configuration is also shown. See [link / reference]. Figure 19 Multiple receiving electrodes Rx0, Rx1, and Rx2 are arranged in parallel along the horizontal direction, while multiple driving electrodes Tx0, Tx1, and Tx2 are arranged in parallel along the vertical direction. The horizontal and vertical directions can be interchanged without any problem.

[0195] Multiple receiving electrodes Rx0, Rx1, Rx2 and multiple driving electrodes Tx0, Tx1, Tx2 are each in bar shape. The receiving electrodes Rx0, Rx1, Rx2 are formed in a first layer, and the driving electrodes Tx0, Tx1, Tx2 are formed in a second layer. The first and second layers are not disposed on the same plane. For example, the first layer may be disposed on the second layer. An insulating layer may be disposed between the first and second layers.

[0196] Multiple receiving electrodes Rx0, Rx1, Rx2 and multiple driving electrodes Tx0, Tx1, Tx2 can be implemented by a metal mesh or a conductive metal.

[0197] Figure 19The touch sensor shown includes multiple dummy receiving electrodes DRx0, DRx1, and DRx2. Each of the multiple dummy receiving electrodes DRx0, DRx1, and DRx2 is formed on a layer containing multiple receiving electrodes Rx0, Rx1, and Rx2. A dummy receiving electrode DRx0, DRx1, or DRx2 can be configured between each of the multiple receiving electrodes Rx0, Rx1, and Rx2.

[0198] Each driving electrode Tx0, Tx1, Tx2 includes a first region stacked with each receiving electrode Rx0, Rx1, Rx2 and a second region stacked with each dummy receiving electrode DRx0, DRx1, DRx2. The area of ​​the first region is larger than the area of ​​the second region. In particular, it is preferable that the area of ​​the second region is as small as possible to minimize the mutual capacitance between the dummy receiving electrodes and the driving electrodes. Alternatively, it can be designed such that, while the receiving electrodes and dummy receiving electrodes have the same shape, the width of the first region stacked with the receiving electrodes in each driving electrode is greater than the width of the second region stacked with the dummy receiving electrodes.

[0199] Since the areas of the multiple driving electrodes Tx0, Tx1, and Tx2 that overlap with the multiple receiving electrodes Rx0, Rx1, and Rx2 are relatively larger, a relatively large mutual capacitance Cm is formed. However, the overlap between the multiple dummy receiving electrodes DRx0, DRx1, and DRx2 and the multiple driving electrodes Tx0, Tx1, and Tx2 is relatively small, so the mutual capacitance Cm formed between them is negligible.

[0200] Through experiments, in conditions such as Figure 6 The touch sensor shown uses a touch input device with a diameter of [diameter value missing] when in the gripped state and the floating state. By testing the conductive rod, raw data can be obtained under various conditions. Figure 20 This is a graph showing the test results; the left side shows the raw data for the gripping state, and the right side shows the raw data for the floating state. (Compared) Figure 20 The original data from the left and right sides confirms that the LGM interference signal occurring in the floating state causes a significant reduction in the level value of the touch area.

[0201] Furthermore, in situations where such Figure 8 The touch sensor shown uses a touch input device with a diameter of [diameter value missing] when in the gripped state and the floating state. The conductive rod was tested, see [reference]. Figure 16 The description states that raw data for each state can be obtained by subtracting the sensing signal output from the receiving electrode that does not form a mutual capacitance with the driving electrode from the sensing signal output from the receiving electrode that forms a mutual capacitance with the driving electrode.

[0202] Figure 21This shows the raw data for the results; the left side shows the raw data for the gripping state, and the right side shows the raw data for the floating state. (Comparison) Figure 21 The raw data can confirm the deviation of the touch level values ​​in the gripping and floating states compared to Figure 20 The phase is significantly lower.

[0203] Further for those with such Figure 6 The touch sensor shown uses a touch input device with a diameter of [diameter value missing] when in the gripped state and the floating state. When testing the conductive rod, the raw data under each state can be obtained. Figure 22 This shows the raw data for the results; the left side shows the raw data for the gripping state, and the right side shows the raw data for the floating state. (Comparison) Figure 22 The original data from the left and right sides confirms that the LGM interference signal occurring in the floating state causes a significant reduction in the level value of the touch area.

[0204] Furthermore, it will have the following characteristics: Figure 8 The touch sensor shown uses a touch input device with a diameter of [diameter value missing] when in the gripped state and the floating state. The conductive rod was tested; see [link / reference]. Figure 16 The description states that the raw data for each state can be obtained by subtracting the sensing signal output from the receiving electrode that does not form a mutual capacitance with the driving electrode from the sensing signal output from the receiving electrode that forms a mutual capacitance with the driving electrode. Figure 23 This is the raw data regarding the results; the left side shows the raw data regarding the gripping state, and the right side shows the raw data regarding the floating state. (Comparison) Figure 23 The original data from the left and right sides can confirm that the level values ​​in the touch area are small in the gripping state and the floating state, and there are even parts where the level values ​​are larger in the floating state.

[0205] Furthermore, for those with such Figure 6 When the touch input device of the touch sensor shown is in a gripping state and a floating state, raw data can be obtained in each state by testing with a real person's thumb. Figure 24 This is the raw data regarding the results; the left side shows the raw data regarding the gripping state, and the right side shows the raw data regarding the floating state. (Comparison) Figure 24 The original data from the left and right sides confirms that the LGM interference signal occurring in the floating state causes a significant reduction in the level value of the touch area.

[0206] Furthermore, the applicant has the following... Figure 8 The touch sensor shown uses a touch input device with a diameter of [diameter value missing] when in the gripped state and the floating state. The conductive rod was tested; see [link / reference]. Figure 16The description states that the raw data for each state can be obtained by subtracting the sensing signal output from the receiving electrode that does not form a mutual capacitance with the driving electrode from the sensing signal output from the receiving electrode that forms a mutual capacitance with the driving electrode. Figure 25 This shows the raw data for the results; the left side shows the raw data for the gripping state, and the right side shows the raw data for the floating state. (Comparison) Figure 25 The original data from the left and right sides confirms that the level values ​​in the touch area are almost identical in both the gripping and floating states.

[0207] A touch input device having a touch sensor according to the above-described embodiments of the present invention has the unique advantage of being able to distinguish two or more touches even in a floating state.

[0208] Figure 26 When existing touch input devices are in a floating state, they cannot recognize multiple touches from multiple objects, creating a blind spot. It is conceivable that... Figure 26 The situation shown is when a user touches the touch surface of the touch input device with two fingers, with the existing touch input device mounted on a bracket inside the car.

[0209] Existing touch input devices such as Figure 26 The left-hand diagram does not recognize one of the two multi-touch events, or as shown in the right-hand diagram, the user made two touches but the touch input device recognizes them as three or four multi-touch events.

[0210] Figure 27 (a) is the raw data when multiple touches are performed after the touch input device with a dual-layer touch sensor is in a floating state. See also Figure 27 In (a), the LGM interference signal occurring in the floating state causes the level value of the multi-touch area to be relatively low. When the reference level value used to determine whether a touch is detected is set to 65, the relatively upper touch portion cannot be recognized as a touch, and only the relatively lower touch portion is recognized as a touch, resulting in the phenomenon that one of the two touches cannot be recognized.

[0211] Figure 27 (b) is to make having as Figure 6 The image shows raw data from multiple touches performed after the touch sensor's touch input device was in a floating state. See also... Figure 27 (b) In the floating state, the LGM interference signal causes a relatively low level in the area that has been touched multiple times. When the reference level for determining whether a touch has occurred is set to 65, it will be recognized as three or more touches.

[0212] Figure 27 (c) is having the following characteristics Figure 8The touch sensor shown is used in touch input devices, see example. Figure 16 The method of subtracting the sensing signal output from the receiving electrode that does not form a mutual capacitance with the driving electrode from the sensing signal output from the receiving electrode that forms a mutual capacitance with the driving electrode includes the raw data from multiple touches performed after the touch input device is in a floating state. See also Figure 27 (c) outputs a relatively large positive (+) level value from the two parts that have been touched multiple times, so the touch input device can accurately recognize the user's multiple touches as multiple touches.

[0213] Furthermore, a touch input device having a touch sensor according to the above-described embodiments of the present invention has the unique advantage of being able to distinguish a third touch that is touched together with a cross touch.

[0214] Figure 28 This demonstrates that when a cross touch and a third touch are performed simultaneously on the touch surface of an existing touch input device, a blind spot for the third touch cannot be recognized.

[0215] Existing touch input devices do not recognize, for example Figure 28 The left and right diagrams show the third touch, which is a cross-touch performed by two fingers of the left hand and a third touch performed by one finger of the right hand.

[0216] Figure 29 (a) is the raw data from a touch input device with a dual-layer touch sensor during cross-touch and third touch. See also Figure 29 In (a), the voltage level at the circled area corresponding to the third touch is relatively lower than that of the cross-touch area. Therefore, the touch input device cannot recognize the third touch.

[0217] Figure 29 (b) refers to those with such Figure 6 The touch sensor shown represents the raw data from both cross-touch and third-touch events simultaneously. See also... Figure 29 In (b), the voltage level at the circled area corresponding to the third touch is relatively lower than that of the cross-touch area. Therefore, the touch input device cannot recognize the third touch.

[0218] Figure 29 (c) is in having such Figure 8 The touch input device of the illustrated touch sensor uses raw data from cross-touch and third touches when the touch input device is operated by subtracting the sensing signal output from the receiving electrode that does not form a mutual capacitance with the driving electrode from the sensing signal output from the receiving electrode that forms a mutual capacitance with the driving electrode. See also Figure 29(c) The two parts of the cross-touch output a relatively large positive (+) level value, and the circle area corresponding to the third touch also outputs a relatively large positive (+) level value. That is, the touch input device can not only recognize cross-touch, but also the third touch.

[0219] Figure 30 A simplified schematic diagram illustrating the configuration of the touch input device according to the present invention. Figure 30 As shown, the touch input device 2100 according to the present invention includes a touch sensor 2110, a touch driving unit 2120 and a touch sensing unit 2130.

[0220] The touch sensor 2110 includes multiple driving electrodes TX, multiple receiving electrodes RX, and dummy electrodes DX. The dummy electrodes DX are electrodes that do not form mutual capacitance with the driving electrodes TX. Therefore, the dummy electrodes DX can be referred to as dummy receiving electrodes. Since the function, configuration, and structure of each electrode have already been described in detail above, further explanation is omitted here.

[0221] The pattern of the touch sensor 2110 can be composed of the various patterns described above. As an example, the touch sensor 2110 includes a first layer with a plurality of driving electrodes TX and a second layer with a plurality of receiving electrodes RX. A plurality of dummy electrodes DX are disposed on the second layer and can be configured to be electrically insulated from the plurality of receiving electrodes RX. Here, the driving electrodes TX may include a first region superimposed on the receiving electrodes RX and a second region superimposed on the dummy electrodes DX and larger than the first region.

[0222] As another example, regarding the pattern of the touch sensor 2110, the multiple driving electrodes TX and the multiple receiving electrodes RX are each diamond-shaped patterns, and the dummy electrode DX can be composed of a dummy pattern disposed inside the diamond-shaped pattern of the receiving electrode RX or the driving electrode TX.

[0223] Since the pattern of the touch sensor 2110 has been described above, a detailed description is omitted here.

[0224] As described above, the touch driving unit 2120 applies touch driving signals to the touch sensor 2110, and more specifically to the plurality of driving electrodes TX provided on the touch sensor 2110, in order to perform touch driving.

[0225] Here, the touch drive signal may not be asynchronous with the display drive signal applied to the display panel (not shown). Here, the display drive signal may be a horizontal sync signal (H-sync), but is not limited to this.

[0226] Figure 31This shows the synchronized and unsynchronized states of the display drive signal and touch drive signal in the touch input device.

[0227] Typically, when the electrodes constituting the touch sensor and the electrodes included in the display panel are close together, parasitic capacitance increases. This increased parasitic capacitance leads to increased capacitive coupling between the electrodes constituting the touch sensor (driving electrodes, receiving electrodes) and the electrodes on the display panel, thus amplifying the impact of noise generated in the display panel when the touch sensor is driven. Therefore, existing touch input devices employ various methods to reduce the noise impact from the display panel. Figure 31 (a) Synchronize the drive signal input to the touch sensor and the drive signal input to the display panel. That is, the display noise occurs synchronously with the horizontal sync signal (H-sync) over time, so the touch drive signal can be synchronized in the interval where the horizontal sync signal is '0' or '1'. In order to synchronize the touch drive signal with the display drive signal, the frequency of the touch drive signal can be n times or 1 / n times that of the display drive signal.

[0228] However, the touch input device 2100 according to the present invention can innovatively reduce the impact of noise by using dummy electrodes, because it can utilize such Figure 31 (b) shows a touch drive signal that is not synchronized with the display drive signal, which enables operation. The frequency of the touch drive signal may be n times ± α or 1 / n times ± β (n: a natural number greater than 2, α, β ≠ 0) of the display drive signal, but is not limited to this. Any frequency that is not synchronized with the display drive signal can be used, regardless of its value or phase.

[0229] The touch input device 2100 according to the present invention employs an asynchronous driving method while also reducing noise. Because it employs an asynchronous driving method, it provides an environment where frequency jumps would be impossible if a synchronous driving method were also employed.

[0230] See you again Figure 31 According to the present invention, the touch sensing unit 2130 of the touch input device 2100 senses the touch position of an object input to the touch surface based on the signal output from the touch sensor 2110. Here, the touch sensing unit 2130 has a differential sensing circuit unit.

[0231] The differential sensing circuit section consists of multiple differential sensing circuits, each of which consists of a first input node, a second input node, a differential amplifier, and an A / D converter.

[0232] The first node receives the first signals SRX1, SRX2, ..., SRXn generated between the driving electrode TX and the receiving electrode RX. The first signals SRX1, SRX2, ..., SRXn-1, SRXn include the capacitance change value and noise value formed between the driving electrode TX and the receiving electrode RX.

[0233] The second node receives second signals SDX1, SDX2, ..., SDXn-1, SDXn, which may vary depending on the pattern and structure of each electrode disposed on the touch sensor 2110. In one embodiment, the second signals SDX1, SDX2, ..., SDXn-1, SDXn can be generated between the driving electrode TX and the dummy electrode DX.

[0234] The second signals SDX1, SDX2, ..., SDXn-1, SDXn (only) contain noise values, which include at least one of the following: capacitance noise caused by LGM (Low Ground Mass) interference signals generated by coupling between the driving electrode, receiving electrode or dummy electrode and the object; noise value of the display panel; and noise value caused by image transformations displayed on the display panel.

[0235] Specifically, the first signal SRX1 generated between the first driving electrode TX1 and the first receiving electrode RX1, and the second signal SDX1 generated between the first driving electrode TX1 and the first dummy receiving electrode DX1, are respectively input to a differential amplifier through a first node and a second node. The difference or amplified output value of these signals is input to a first A / D converter to output a first digital signal. Similarly, the first signal SRX2 generated between the second driving electrode TX2 and the second receiving electrode RX2, and the second signal SDX2 generated between the second driving electrode TX2 and the second dummy receiving electrode DX2, are respectively input to a differential amplifier through a first node and a second node. The difference or amplified output value of these signals is input to a first A / D converter to output a second digital signal.

[0236] The process described above is performed on all or some of the electrodes. The first signal SRXn generated between the nth driving electrode TXn and the nth receiving electrode RXn, and the second signal SDXn generated between the nth driving electrode TXn and the nth dummy receiving electrode DXn, are respectively input to a differential amplifier through a first node and a second node. The difference or the output value of the difference amplification is input to the nth A / D converter to output the nth digital signal. The first to nth digital signals are used as the basic signals for sensing whether a touch has occurred and the position.

[0237] The differential amplifier subtracts the first signal SRX1, SRX2, ..., SRXn-1, SRXn and the second signal SDX1, SDX2, ..., SDXn-1, SDXn, amplifies their difference, and outputs it. The output values ​​X1, X2, ..., Xn-1, Xn of the differential amplifier are transmitted to the A / D converter and converted into digital signals.

[0238] The touch input device 2100 according to the present invention uses a differential amplifier for every two receiving channels, thus significantly improving energy efficiency compared to the existing method of connecting a differential amplifier to each channel.

[0239] Furthermore, the touch input device 2100 according to the present invention performs touch driving using a touch driving signal that is not synchronized with the display driving signal, thus enabling free frequency hopping.

[0240] Figure 32 The flowchart illustrates one embodiment of the frequency switching operation in the touch input device 2100 according to the present invention. This is merely one embodiment and is independent of specific conditions (the presence, magnitude, range, etc.) that allow the touch input device 2100 according to the present invention to be driven at a switching frequency.

[0241] The touch driving unit 2120 applies a touch driving signal with a first frequency to the touch sensor 2110 to perform touch driving (S200).

[0242] Here, the noise value output by the dummy receiving electrode DX is extracted (S210), and it is determined whether the noise value exceeds a preset threshold value (S220).

[0243] Here, noise value extraction can utilize dummy scanning. Dummy scanning involves scanning the noise level at the current effective frequency during touch sensor operation. Here, the current effective frequency can be defined as the current driving frequency ± the current phase reversal frequency. Dummy scanning can be performed by reading the noise level during a periodic phase reversal of the current driving frequency corresponding to the current phase reversal frequency. In another embodiment, dummy scanning can be performed by reading the noise level at a frequency equivalent to the current effective frequency value.

[0244] If the noise value does not exceed the preset threshold (S220 - No), the frequency hopping operation ends, or the noise value is checked again after a preset time to see if it exceeds the preset threshold. If the noise value exceeds the preset threshold (S220 - Yes), the frequency of the touch drive signal is changed (S230). That is, a touch drive signal that has been hopped to a second frequency with a frequency value different from the first frequency can be applied to the touch sensor 2110.

[0245] The touch input device 2100 according to the present invention utilizes an asynchronous driving method, thus enabling free frequency switching even under external environmental noise and CMI noise, thereby fundamentally solving the problems inherent in synchronous driving. Furthermore, since it includes a differential circuit utilizing dummy receiving electrodes, the problem of signal cancellation is also resolved at its source.

[0246] Figure 33 This is a simplified schematic diagram of a smart device according to the present invention. The smart device 21000 according to the present invention includes a touch input module 2100, a display panel 2200, and a wireless charging module 2300.

[0247] The touch input module 2100 can be found in the above references. Figures 30 to 32 The aforementioned description will not be repeated here. The display panel 2200 can be either a rigid OLED panel or a flexible OLED panel. In the case of a rigid OLED panel, the encapsulation layer and TFT layer can be formed of glass; in the case of a flexible OLED panel, the encapsulation layer can be formed of a thin film, and the TFT layer can be formed of a PI film. Alternatively, the display panel can be an OLED panel or an LCD panel.

[0248] The wireless charging module 2300 and the external wireless charger WC form a magnetic field to generate an electrical signal. Here, the frequency of the magnetic field forming signal used to form the magnetic field between the wireless charging module 2300 and the external wireless charger WC may be different from the frequency of the touch driving signal of the touch input device 2100 according to the present invention.

[0249] Figure 34This is a structural diagram of a smart device according to the present invention. The smart device 21000 according to the present invention can be implemented as a smartphone, tablet personal computer, mobile phone, videophone, e-book reader, desktop personal computer, laptop personal computer, netbook computer, workstation, personal digital assistant (PDA), portable multimedia player (PMP), MP3 player, mobile medical device, camera, or wearable device (e.g., smart glasses, head-mounted device (HMD), electronic clothing, electronic bracelet, electronic necklace, electronic accessory, electronic tattoo, smartwatch), smart mirror, kiosk, etc. Furthermore, the smart device 21000 can be implemented by smart home appliances such as TVs, DVD (digital video disk) players, speakers, refrigerators, air conditioners, vacuum cleaners, microwave ovens, washing machines, air purifiers, set-top boxes, home automation control panels, security control panels, TV boxes, game consoles, electronic dictionaries, electronic keys, camcorders, or electronic photo frames, but is not limited to these.

[0250] like Figure 34 As shown, the smart device 21000 includes a touch input module 2100, a display panel 2200, a wireless charging module 2300, a control unit 2400, and a battery 2500.

[0251] Since the touch input module 2100, display panel 2200 and control unit 2400 have been described in detail above, their description will be omitted here.

[0252] Battery 2500 can use various types of batteries, including lithium-ion batteries, nickel-cadmium batteries, nickel-polymer batteries, potassium-ion batteries, sodium-ion batteries, lithium-sulfur batteries, lithium-air batteries, and lithium-polymer batteries. Battery 2500 can be charged by receiving electrical signals from the wireless charging driver unit 2320.

[0253] The wireless charging module 2300 includes a wireless charging coil 2310 and a wireless charging driver 2320. The wireless charging coil 2310 forms a magnetic field with the transmitting coil of an external wireless charger WC, generating an electrical signal through magnetic induction or resonant inductive coupling. The wireless charging driver 2320 receives the electrical signal from the wireless charging coil 2310 to charge the battery 2500. The wireless charging coil 2310 can be formed in various structures such as a spiral or cylindrical shape, but is not limited to these.

[0254] Here, the frequencies used by the wireless charging coil 2310 and the transmitting coil of the external wireless charger WC to form the magnetic field may be different from the frequency of the touch driving signal of the touch input device 2100 according to the present invention. In one embodiment, the frequencies used to form the magnetic field, the frequency of the touch driving signal, and the display driving frequency may all be different and asynchronous.

[0255] The magnetic induction method utilizes the electromagnetic induction principle that allows the wireless charging coil 2310 to supply current when the transmitting coil of the external wireless charger WC generates a magnetic field. The transmitting coil and the wireless charging coil 2310 of the external wireless charger WC should be positioned close together to achieve a power transmission efficiency of over 90%, offering the advantage of extremely high power transmission efficiency.

[0256] The magnetic resonance method utilizes a magnetic field generated by the transmitting coil of the external wireless charger WC, vibrating at a resonant frequency. This ensures that energy is concentrated and transferred only to the wireless charging coil 2310, which is designed to resonate at the same frequency. The resonant frequency is achieved using frequencies in the range of several MHz to tens of MHz, creating magnetic resonance. Compared to magnetic induction, this method offers the advantage of efficiently transferring energy over longer distances. Energy not absorbed by the wireless charging coil 2310 is emitted into the air and does not disappear; instead, it is reabsorbed by the transmitting coil of the external wireless charger WC, resulting in high efficiency.

[0257] The wireless charging drive unit 2320 of the smart device 21000 according to the present invention can utilize either magnetic induction or magnetic resonance, but is not limited thereto, and can utilize various methods such as microwave.

[0258] The smart device 21000 according to the present invention utilizes an asynchronous driving method, thus enabling free frequency hopping even under external environmental noise and CMI noise, thereby fundamentally solving the problems inherent in synchronous driving. Furthermore, since it includes a differential circuit utilizing dummy receiving electrodes, it also addresses the problem of signal cancellation at its source. Moreover, since the touch sensor can be driven using a frequency different from that of the external wireless charger, when interference is detected during wireless charging, a frequency hopping can be performed to drive the touch sensor with a frequency value different from the touch driving signal.

[0259] When the wireless charging module's driving frequency is synchronized, and the touch driving frequency and the wireless charging module's driving frequency are the same or in a very similar range, the wireless charging frequency interferes with the touch signal. Therefore, touch actions (recognition) may not be able to be performed normally. That is, a problem may occur where touch actions cannot be performed normally during wireless charging.

[0260] However, the smart device 21000 according to the present invention performs asynchronous driving, so in the event of the interference as described above, it is possible to set a frequency different from the driving frequency of the wireless charging module to the touch driving frequency by frequency switching.

[0261] Therefore, the touch driver unit 2120 can determine whether the wireless charging module 2300 is interfering with wireless charging, and perform frequency hopping if interference is detected. For example, if the noise value output by the dummy receiving electrode exceeds a preset threshold, the touch driver unit 2120 can perform frequency hopping to drive the touch sensor 2110 with a frequency value different from the frequency of the touch driving signal.

[0262] -Second Implementation Method

[0263] Figures 35 to 3 Example 8 illustrates a floating situation that occurs during touch input on touch input device 1.

[0264] Specifically, such as Figure 35 As shown in Figure 36, a situation may occur where the user floats during the touch input process on the touch input device 1, thus preventing the finger from functioning properly as a ground.

[0265] For example, such as Figure 35 As shown, when a user grips the touch input device 1, which folds outward from the hinge H, the thumb inputs a single touch on the touch surface of the first display area 151a, while the other four fingers can simultaneously input multiple touches on the touch surface of the second display area 151b.

[0266] That is, the user's actual intention to input is a single touch on the first display area 151a, but because it needs to be supported by the other four fingers through a gripping action, it will also input multiple touches on the second display area 151b at the same time.

[0267] In this case, multiple touches caused by four fingers are also input to the front of the display module 151 instead of the housing of the touch input device 1, so signal distortion occurs between the five touch input positions due to floating.

[0268] For example, such as Figure 36a As shown, observing the digital value of a single touch portion (circular dashed line) on the touch surface of the first display area 151a, it can be seen that compared to... Figure 36b The digital value in the central part is significantly lower. This is due to signal splitting; in reality, the user may have input a single touch on the touch surface, but the touch input device 1 may misidentify it as two or more touches, or as no touch at all. Alternatively, observing the digital value of the multi-touch portion (circular dashed line) of the touch surface of the second display area 151b reveals a significant difference compared to... Figure 36b Some numerical values ​​are even lower because the LGM (low ground mass) interferes with the signal, which will be explained in detail later.

[0269] For reference, this phenomenon occurs between the first display area 151a and the second display area 151b centered on the hinge portion H, and can occur in the same or similar manner when at least one touch input is performed on the touch surface of the first display area 151a and the touch surface of the second display area 151b respectively.

[0270] And, as Figure 37 As shown in (a) to (c), this signal distortion can occur in the same or similar ways in various cases where the outward folding angle is from 0 degrees to 180 degrees.

[0271] In addition, as shown in FIG36, for the touch input device 1 that folds outward with the hinge portion H as the center, the user can input multiple touches on the touch surface of the first display area 151a or the touch surface of the second display area 151b.

[0272] In this case, the actual user's intended touch may be a multi-touch on the touch surface of the first display area 151a or the touch surface of the second display area 151b.

[0273] Here, all multi-touch inputs are also sent to the front of the display module 151, resulting in signal distortion caused by floating between touch input positions.

[0274] For example, such as Figure 38aAs shown, observing the digital values ​​of the multi-touch portion (circular dashed line) of the touch surface of the second display area 151b reveals that compared to Figure 38b Some numerical values ​​are even lower. This may occur when signals are split, or when the user actually makes a touch input to the touch surface but the touch input device 1 misidentifies it as two or more touches, or misidentifies it as no touch at all. This is because the LGM (low ground mass) interferes with the signal.

[0275] For reference, if multiple touch inputs are performed only on the touch surface of the first display area 151a or only on the touch surface of the second display area 151b, this phenomenon may occur only in the first display area 151a or the second display area 151b.

[0276] And, as Figure 37 In all cases (a) to (c) where the outward folding angle is from 0 degrees to 180 degrees, this signal distortion phenomenon can occur in the same / similar way.

[0277] This invention was derived to solve this problem, and will be described in detail below.

[0278] Figure 39a This is a configuration diagram of the touch input device 1 according to an embodiment.

[0279] like Figure 39a As shown, the touch input device 1 according to the embodiment may include a first main body 101, a second main body 102, and a display module 151 composed of a first display area 151a and a second display area 151b.

[0280] The first main body 101 and the second main body 102 are connected by a hinge H, and the angle between the first main body 101 and the second main body 102 is variable.

[0281] The display module 151 may include a first display area 151a located on one side of the first main body 101 and a second display area 151b located on one side of the second main body 102.

[0282] The other side of the main body 101 and 102 may not have a display module 151.

[0283] The first display area 151a can be supported by the first main body 101, and the second display area 151b can be supported by the second main body 102.

[0284] Electronic components may be installed in the first main body 101 and / or the second main body 102.

[0285] The touch input device 1 includes a housing (e.g., frame, shell, cover, etc.) that forms its shape. Multiple housings are combined to form an internal space in which various electronic components are disposed.

[0286] Display module 151 displays (outputs) information processed by touch input device 1. For example, display module 151 may display runtime screen information of an application driven by touch input device 1 or UI (User Interface) or GUI (Graphic User Interface) information about such runtime screen information.

[0287] like Figure 44 As shown, the display module 151 may include a cover layer 100, a touch sensor 10, and a display panel 200. That is, the display module 151 can function as a touch screen.

[0288] The touch sensor 10 may be formed independently of the display panel 200 on the upper part of the display panel 200, or it may be integrated with the display panel 200 and formed within the display panel 200. See also Figure 44 Its specific composition will be explained.

[0289] The display panel 200 may be implemented using at least one of liquid crystal display (LCD), thin film transistor-liquid crystal display (TFT LCD), organic light-emitting diode (OLED), 3D display, and e-ink display.

[0290] In particular, the present invention utilizes a display module 151 in which the curvature of the display module 151 can change simultaneously when the two main body parts 101 and 102 rotate around the hinge part H. The display module 151 can be configured to deform under external force. Deformation according to the embodiment may include bending, folding, twisting, curling, unfolding, etc. of the display module 151.

[0291] Depending on the shape of the hinge part H and the way the main body parts 101, 102 and the display module 151 are combined, a terminal device with a shape that bends in only one direction or a terminal device with a shape that bends in both directions can be used.

[0292] This deformable display module 151 can be named a flexible display unit. According to embodiments, the flexible display unit may include various types of displays whose shape can be deformed when subjected to external forces, such as foldable displays that can be folded or unfolded into a specific angle or curvature, flexible displays that can be bent or unfolded into a specific curvature, and rollable displays that can be rolled into a cylindrical shape.

[0293] In particular, according to an embodiment of the present invention, the touch input device 1 can be implemented by a foldable device, in which case the foldable device can be folded and unfolded with reference to the folding axis formed by the hinge portion H.

[0294] Folding can be illustrated with examples of inward folding and outward folding states.

[0295] According to the embodiments, such as Figure 39b The outward-folding state is defined as the state in which the front part of the display module 151 (the upper part of the cover layer 100) is exposed to the outside. That is, it can be said that when in the outward-folding state, the front part of the display module 151 (the upper part of the cover layer 100) is located on the outside of the folded foldable device. In the outward-folding state, the user can confirm the displayed screen or content exposed to the outside.

[0296] The touch input device 1 may further include a deformation sensing unit (not shown).

[0297] The deformation sensing unit (not shown) can sense the deformation action of the touch input device 1 and transmit information about the sensed deformation action to the AP (processor, not shown). The deformation sensing unit (not shown) can sense the deformation state of the touch input device 1 or the display module 151 after it is turned on for use.

[0298] The deformation sensing unit can use at least one sensor to collect and analyze information about deformation actions to sense the deformation actions of the touch input device 1. The deformation actions, as described above, can include folding, bending, defolding, debending, and winding actions.

[0299] The deformation sensing unit can obtain information related to the deformation action, such as deformation position (coordinate value, deformation line), deformation direction, deformation angle, deformation curvature, deformation intensity, deformation speed, deformation number, deformation action occurrence time, and deformation action holding time.

[0300] The deformation sensing unit can be implemented by a load cell, a bending sensor, an infrared sensor, a pressure sensor, an electromagnetic sensor, etc., or, according to an embodiment, it can be implemented as a touch sensor 10 capable of sensing deformation.

[0301] Figure 40A configuration diagram of the touch sensor 10 according to an embodiment is shown.

[0302] See Figure 40 According to an embodiment, the touch sensor 10 includes a pattern of a predetermined shape, which may include a plurality of driving electrodes TX1 to TXm, a plurality of receiving electrodes RX1 to RXn, and a plurality of receiving dummy electrodes Dummy RX1 to Dummy RXn.

[0303] For the operation of the touch sensor 10, it may also include a driving unit 12 that applies driving signals to a plurality of driving electrodes TX0 to TXm and a sensing unit 11 that receives sensing signals from a plurality of receiving electrodes RX1 to RXn, including information on the amount of capacitance change as the touch surface changes, in order to detect touch and touch position.

[0304] Figure 40 The driving unit 12 and the sensing unit 11 can be configured as a touch detection unit 14 capable of detecting whether or not the touch sensor 10 is touched and the touch position. Furthermore, the touch detection unit 14 may further include a control unit 13.

[0305] According to an embodiment, the touch sensor 10 is capable of receiving multiple touch inputs from a subject to at least one of the first display area 151a and the second display area 151b. Furthermore, in response to the multiple touch inputs from the subject, the touch detection unit 14 can subtract at least one second sensing signal from at least one receiving electrode that does not form a mutual capacitance with the at least one driving electrode from at least one first sensing signal output from at least one receiving electrode that forms a mutual capacitance with the at least one driving electrode. And, based on this subtraction information, at least one of the multiple touch inputs input to the touch sensor 10 can be detected.

[0306] In particular, according to the present invention, when the touch input device 1 is folded outward and the object is floating after multiple touch inputs to at least one of the first display area 151a and the second display area 151b, the LGM interference signal can be removed by subtracting the second sensing signal output from the receiving dummy electrode from the first sensing signal output from the receiving electrode.

[0307] That is, not only when the touch input device 1 is folded inward, but also when the touch input device 1 is held in the outward folded state and floats, touch input information with the LGM interference signal removed can be obtained.

[0308] Furthermore, this principle is, for example, as follows: Figure 35 For example, the same / similar approach can be applied when a single touch is input to the touch surface of the first display area 151a, and multiple touches are input simultaneously by the other four fingers to the touch surface of the second display area 151b.

[0309] That is, the actual user's intended touch is a single touch on the first display area 151a, but it needs to be supported by the other four fingers through a gripping action. Therefore, the above principle can also be applied when multiple touches on the second display area 151b are also input at the same time.

[0310] According to another embodiment, the same / similar approach can also be applied when at least one touch input is performed on the touch surface of the first display area 151a and the touch surface of the second display area 151b, respectively.

[0311] Furthermore, this principle can also be applied in the same / similar way to, for example, Figure 37 Examples include multiple touch inputs performed only on the touch surface of the first display area 151a or only on the touch surface of the second display area 151b.

[0312] Furthermore, in cases such as Figure 35 and Figure 37 This principle can be applied in the same / similar way to the various cases shown in (a) to (c) where the outward folding angle is from 0 degrees to 180 degrees.

[0313] According to the embodiment, the first sensing signal may include information on the amount of change in mutual capacitance between any driving electrode and a predetermined receiving electrode caused by object touch, and information on the capacitance that reduces the amount of change in mutual capacitance caused by coupling between the object and any driving electrode and / or the predetermined receiving electrode (1).

[0314] Furthermore, according to the embodiment, the sensing unit 11 can output a second sensing signal from a predetermined receiving dummy electrode. The predetermined receiving dummy electrode may not form mutual capacitance with any driving electrode. In practice, a weak mutual capacitance may be formed, but this weak mutual capacitance can be ignored when detecting whether a touch is detected.

[0315] According to the embodiment, the second sensing signal may include information (1) about the capacitance that reduces the amount of mutual capacitance change due to the coupling between the object and any driving electrode and / or a predetermined receiving dummy electrode caused by the object touch.

[0316] The above (1) and (2) can be named LGM interference signals, and the generation principle of LGM interference signals will be explained later.

[0317] The sensing unit 11 can obtain the change in pure mutual capacitance between any driving electrode and a predetermined receiving electrode using the first sensing signal and the second sensing signal.

[0318] In this invention, this method can suppress, or even remove, local noise such as LGM interference signals in the signal detected from the receiving electrode, thereby further improving touch sensitivity.

[0319] Figure 40 The touch sensor 10 is shown to have a plurality of driving electrodes TX1 to TXm, a plurality of receiving electrodes RX1 to RXn, and a plurality of receiving dummy electrodes Dummy RX1 to Dummy RXn arranged in an orthogonal array. However, the present invention is not limited to this, and the plurality of driving electrodes TX1 to TXm, the plurality of receiving electrodes RX1 to RXn, and the plurality of receiving dummy electrodes Dummy RX1 to Dummy RXn can be arranged in any dimension, such as diagonal, concentric circles, or three-dimensional random arrangement, and their applications can be varied. Here, n, l, and m are positive integers and can have the same or different values, and their magnitudes can vary depending on the implementation.

[0320] Multiple driving electrodes TX1 to TXm, multiple receiving electrodes RX1 to RXn, and multiple receiving dummy electrodes Dummy RX1 to Dummy RXn, as shown below. Figures 42 to 43 As shown, they can be arranged to intersect each other. Specifically, multiple driving electrodes TX1 to TXm can extend along the first axis direction, and multiple receiving electrodes RX1 to RXn and multiple receiving dummy electrodes Dummy RX1 to DummyRXn can be arranged to extend along the second axis direction intersecting the first axis direction.

[0321] Multiple driving electrodes TX1 to TXm, multiple receiving electrodes RX1 to RXn, and multiple receiving dummy electrodes Dummy RX1 to Dummy RXn, as shown below. Figures 42 to 43 As shown, it can be formed in different 2-layer configurations. For example, as... Figure 42 As shown, it can be a bar pattern, such as... Figure 43 As shown, the pattern can be diamond-shaped. The layer with multiple driving electrodes TX1 to TXm can be disposed on the layer with multiple receiving electrodes RX1 to RXn, or vice versa. An insulating layer can be formed between the two layers to prevent short circuits between the multiple driving electrodes and the multiple receiving electrodes.

[0322] For reference only. Figure 40 , Figure 42 and Figure 43In one example, multiple receiving electrodes RX1 to RXn are configured together, followed by multiple dummy receiving electrodes Dummy RX1 to Dummy RXn. However, according to another embodiment, at least one of the multiple receiving electrodes RX1 to RXn and at least one of the multiple dummy receiving electrodes Dummy RX1 to Dummy RXn can be configured alternately. That is, they can be configured as RX1-Dummy RX1-RX2-Dummy RX2.

[0323] A touch sensor 10 including multiple driving electrodes TX1 to TXm, multiple receiving electrodes RX1 to RXn, and multiple receiving dummy electrodes DummyRX1 to Dummy RXn. Figure 44 As shown in (a), it can be configured together with the upper / lower OCA between the cover layer 100 and the display panel 200A (add-on). As shown in (b) of 44, the touch sensor 10 can be directly configured on top of the display panel 200A (e.g., on top of the encapsulation layer of the display panel 200A) (on-cell). Additionally, the touch sensor 10, including multiple driving electrodes TX1 to TXm, multiple receiving electrodes RX1 to RXn, and multiple receiving dummy electrodes Dummy RX1 to Dummy RXn, can be configured as follows: Figure 4 (c) is configured inside the display panel 200A (e.g., between the encapsulation layer and the organic light-emitting layer of the display panel 200A) (in-cell).

[0324] Figure 44 In (a) to (c), the display panel 200A can be a rigid OLED panel or a flexible OLED panel. In the case of a rigid OLED panel, the encapsulation layer TFT layer can be formed of glass; in the case of a flexible OLED panel, the encapsulation layer is formed of a thin film, and the TFT layer can be formed of a PI film.

[0325] in addition, Figure 44 Images (a) through (c) show that display panel 200A is an OLED panel, but it is not limited to this, such as... Figure 44 As shown in (d) to (f), the display panel 200B can also be an LCD panel. In terms of the characteristics of an LCD panel, a backlight unit (BLU) 250 is arranged below the display panel 200B.

[0326] Specifically, such as Figure 44 As shown in (d), the touch sensor 10 can be attached to the cover window glass 100 (Add-on). Although not shown, the touch sensor 10 can also be attached to the top of the cover window glass 100 in the form of a film. Figure 44As shown in (e), the touch sensor 10 can be formed on the color filter glass (on-cell) of the display panel 200B. The touch sensor 10, as shown, can be formed on top of the color filter glass; although not shown, it can also be formed below the color filter glass. Figure 44 As shown in (f), the touch sensor 10 can be formed on the TFT array (in-cell). While not shown, the touch sensor 10 can also be formed on top of the TFT array, although not explicitly illustrated. Furthermore, although not specifically shown, one of the driving electrode and the receiving electrode can be formed on the color filter glass of the display panel 200B, with the others formed on the TFT array.

[0327] See you again Figure 40 At least one of the plurality of driving electrodes TX1 to TXm, the plurality of receiving electrodes RX1 to RXn, and the plurality of receiving dummy electrodes Dummy RX1 to Dummy RXn can be formed of a transparent conductive material (e.g., ITO (Indium Tin Oxide) or ATO (Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is only an example, and at least one of the plurality of driving electrodes TX1 to TXm, the plurality of receiving electrodes RX1 to RXn, and the plurality of receiving dummy electrodes Dummy RX1 to Dummy RXn can also be formed of other transparent conductive materials or non-transparent conductive materials. For example, it can be configured to include at least one of silver ink, copper, nano silver, and carbon nanotubes (CNTs). Furthermore, at least one of the multiple driving electrodes TX1 to TXm, multiple receiving electrodes RX1 to RXn, and multiple receiving dummy electrodes Dummy RX1 to Dummy RXn can be implemented by a metal mesh.

[0328] The driving unit 12 can apply a driving signal to the driving electrodes TX1 to TXm. The sensing unit 11 can receive a first sensing signal containing information about the change in mutual capacitance generated between the driving electrodes TX1 to TXm and the receiving electrodes RX1 to RXn via the receiving electrodes RX1 to RXn, in order to detect whether a touch has occurred and the touch location. The first sensing signal includes not only the signal of the driving signal applied to the driving electrodes TX1 to TXm coupled by the mutual capacitance generated between the driving electrodes TX1 to TXm and the receiving electrodes RX1 to RXn, but also a noise signal. The noise signal may include LGM interference signal information generated in the floating state.

[0329] The sensing unit 11 can receive a second sensing signal formed between the driving electrodes TX1 to TXm and the receiving dummy electrodes Dummy RX1 to Dummy RXn. A weak mutual capacitance can actually be formed between the driving electrodes TX1 to TXm and the receiving dummy electrodes Dummy RX1 to Dummy RXn, but the weak mutual capacitance can be ignored when detecting whether a touch is detected.

[0330] According to an embodiment, the sensing unit 11 may include a plurality of receivers 111, 111a to 111n.

[0331] For example, see Figure 41 Receivers 111, 111a to 111n can be composed of amplifiers AMP1 to AMPn.

[0332] The negative (-) input terminals (N1-1 to IN1-n) of the amplifier can be connected to the corresponding receiving electrodes RX1 to RXn respectively to receive the first sensing signal (sensing signal 1-1, sensing signal 1-2, ..., sensing signal 1-n).

[0333] The positive (+) input terminals IN2-1 to IN2-n of the amplifier can be connected to the corresponding receiving dummy electrodes Dummy RX1 to Dummy RXn to receive the second sensing signal (sensing signal 2-1, sensing signal 2-2, ..., sensing signal 2-n).

[0334] According to another embodiment, the amplifier's negative (-) input terminals IN1-1 to IN1-n can receive each of the second sensing signals, and the amplifier's positive (+) input terminals IN2-1 to IN2-n can receive each of the first sensing signals.

[0335] Each receiver 111, 111a to 111n can be connected to each receiving electrode RX1 to RXn and each receiving dummy electrode Dummy RX1 to Dummy RXn via a switch. The switch is turned on during the time interval of sensing the signals of the corresponding receiving electrodes RX1 to RXn and receiving dummy electrodes Dummy RX1 to Dummy RXn, so that the voltage difference between each first sensing signal (sensing signal 1-1, sensing signal 1-2, ..., sensing signal 1-n) input from the receiving electrodes RX1 to RXn and each second sensing signal (sensing signal 2-1, sensing signal 2-2, ..., sensing signal 2-n) input from the receiving dummy electrodes Dummy RX1 to Dummy RXn is output.

[0336] In this invention, each first sensing signal (sensing signal 1-1, sensing signal 1-2, ..., sensing signal 1-n) and each second sensing signal (sensing signal 2-1, sensing signal 2-2, ..., sensing signal 2-n) can be input to each receiver 111, 111a to 111n through two corresponding channels, thus saving power compared to inputting to the receiver through one channel.

[0337] The sensing unit 11 may further include various analog-to-digital converters (ADCs) ADC1 to ADCn that convert the differences output by the respective receivers 111, 111a to 111n into digital data values. The digital data is then input to a processor (not shown) and processed to acquire touch information about the touch sensor 10.

[0338] For the purposes of this invention, utilizing as Figure 41 The sensing unit 11 shown is configured to apply a touch driving signal that is not synchronized with the display driving signal to the touch sensor 10, and has the effect of ensuring that the signals do not cancel each other out even when the signals enter simultaneously through the negative (-) input terminal and the positive (+) input terminal of each amplifier.

[0339] The control unit 13 can perform the function of controlling the operation of the drive unit 12 and the sensing unit 11. For example, after generating a drive control signal, the control unit 13 can transmit it to the drive unit 12 so that the drive signal is applied to the preset drive electrodes TX1 to TXm at a predetermined time. Furthermore, after generating a sensing control signal, the control unit 13 can transmit it to the sensing unit 11 so that the sensing unit 11 receives a first sensing signal from the preset receiving electrodes RX1 to RXn at a predetermined time, receives a second sensing signal from the preset receiving dummy electrodes Dummy RX1 to Dummy RXn, and performs a preset function.

[0340] Figure 40 The touch detection unit 14 can be integrated into the touch sensing integrated circuit (IC). The driving electrodes TX1 to TXm, receiving electrodes RX1 to RXn, and receiving dummy electrodes Dummy RX1 to Dummy RXn included in the touch sensor 10 can be connected to the driving unit 12 and sensing unit 11 included in the touch sensing IC, for example, via conductive traces and / or conductive patterns printed on the circuit board. The touch sensing IC can be located on a circuit board with printed conductive patterns, such as a touch circuit board (referred to as a touch PCB). According to an embodiment, the touch sensing IC can be mounted on a motherboard for operation of a touch input device.

[0341] As described above, a predetermined capacitance Cm is generated at each intersection of the driving electrodes TX1 to TXm and the receiving electrodes RX1 to RXn. The value of capacitance Cm can change when an object such as a finger or pen is brought near the touch sensor 10. Figure 40 The capacitance mentioned herein can represent mutual capacitance Cm. This electrical characteristic can be sensed by the sensing unit 11 to sense whether or not the touch sensor 10 is touched and / or the touch position. For example, it is possible to sense whether or not the touch sensor 10 is touched and / or the touch position on the surface of the touch sensor 10, which is composed of a two-dimensional plane formed by a first axis and a second axis.

[0342] See below Figures 45 to 46 illustrate Figure 36a and Figure 38a The reason why the digital value (or signal level) output by the touch input device shown is different when it is in floating state and when it is in normal state is explained.

[0343] Figure 45 and Figure 46 This is a schematic diagram illustrating the principle of generating an LGM interference signal when a touch input device with a touch sensor implemented as a two-layer is in a floating state. For reference, the subject in the following description may include a finger or a stylus.

[0344] For reference, the following is an example of a normal grounding condition where the finger functions properly. Furthermore, as an example of a condition where an LGM interference signal occurs, the finger cannot function properly grounding due to floating.

[0345] For example, when the surface of a touch input device is touched with a thumb, under normal conditions without an LGM interference signal, a first mutual capacitance change ΔCm1 is detected between any driving electrode and a predetermined receiving electrode. However, under conditions where an LGM interference signal occurs, a second mutual capacitance change ΔCm2, smaller than the first mutual capacitance change ΔCm1, is detected. That is, an LGM interference signal can be defined as a signal including information about the capacitance that acts opposite to the first mutual capacitance change ΔCm1, reducing its magnitude (for reference, ΔCm1 and ΔCm2 are defined as absolute values ​​here). In other words, when any driving electrode and a predetermined receiving electrode are connected by touching a low-ground conductive object, an additional current path is generated through the coupling between the object and the driving electrode and / or the predetermined receiving electrode. The driving signal is transmitted to the predetermined receiving electrode through this path, thereby generating an LGM interference signal opposite to the normal touch signal.

[0346] Furthermore, in this invention, the LGM interference signal is not only formed between the object and any driving electrode and / or a predetermined receiving electrode, but can also be formed between the object and any driving electrode and / or a predetermined receiving dummy electrode.

[0347] And see also Figure 45 and Figure 46 When the amount of LGM interference signal generation increases relatively in any single unit region (including multiple driving electrodes and multiple receiving electrodes within the dashed area), such as... Figure 36a and Figure 38a As shown, the final output digital value corresponding to the first sensing signal decreases. In particular, in the case of a large touch (defined in this invention as a case where the area of ​​the thumb is larger than that of the other fingers), the LGM interference signal increases relatively.

[0348] LGM interference signals C1, C2, such as Figure 45 and Figure 46 As shown, when the object touches the touch surface of the touch input device in a floating state, a mutual capacitance Cm is generated between the driving electrode and the receiving electrode, and this occurs through the coupling between the object and the driving electrode and / or the receiving electrode.

[0349] Additionally, see Figures 49 to 50 for an explanation of the principle by which the touch sensor 10 on the same layer generates an LGM interference signal.

[0350] Before this, as Figure 47 and Figure 48As shown, in the touch sensor 10 according to an embodiment of the present invention, a plurality of driving electrodes TX1 to TXm and a plurality of receiving electrodes RX1 to RXn can be formed on the same layer as each other. For example, the plurality of driving electrodes TX1 to TXm and the plurality of receiving electrodes RX1 to RXn can be formed on the top of the display panel.

[0351] Figure 49a The diagram illustrates an electrode configuration where multiple identical receiving electrodes RX1 are arranged in the touch window area S, resulting in a relatively increased amount of LGM-impeded signal generation. In this invention, identical receiving electrodes refer to electrodes connected to a single sensing channel, and identical driving electrodes refer to electrodes connected to a single driving channel.

[0352] Furthermore, in this invention, the touch window area S can be defined as an area larger than the touch area of ​​the other fingers, similar to the touch area of ​​the thumb. (See reference) Figure 50e The area of ​​the touch window region S can be approximately 15mm*15mm or more and approximately 20mm*20mm or less, but preferably, it can be approximately 16mm*16mm in size. In particular, Figure 50e The area of ​​the example touch window region S is approximately 16mm x 16mm.

[0353] Specifically, unit ( Figure 50e The area of ​​the diagonal section can be approximately 4mm (vertical) * 2mm (horizontal). Therefore, in Figure 50e In this case, the vertical length of an RX electrode (the size of four unit cells) is approximately 16 mm, and the horizontal length is approximately 2 mm. Furthermore, the vertical length of a TX electrode (the size of one unit cell) is approximately 4 mm, and the horizontal length is approximately 2 mm. Therefore, Figure 50e The example implementation shows that the area of ​​the touch window region S is approximately 16mm x 16mm.

[0354] Here, as Figure 49b As shown, when the surface of the touch sensor is touched with the thumb, the finger touch area (touch window area S) is as follows: Figure 49c Under normal conditions where LGM (Low Ground Mass) interference does not occur, the final capacitance change ΔC 总 It consists only of the '+' capacitance value ΔCm (e.g., > +250), while in the case of an LGM interference signal, due to the '-' LGM interference signal CLGM (e.g., > -200), the final capacitance change ΔC will be lower. 总 (Example > 50). That is, the LGM interference signal refers to the signal that has the opposite effect to the '+' capacitance value, resulting in a final capacitance change ΔC. 总 A decreasing signal.

[0355] For example, Figure 49d This illustrates how the number of identical receiving electrodes RX1 within the thumb's contact area gradually increases as the contact area grows. (State 1: one -> State 2: three -> State 3: four)

[0356] In the finger-touched area, under normal conditions without LGM interference signal, the final capacitance change ΔC 总 It consists only of the '+' capacitance value ΔCm (e.g., >+250), but under conditions where the LGM interference signal is large, the final capacitance change ΔC 总 Almost disappears. As mentioned above, with the increase in the number of identical receiving electrodes RX1 contained in the finger-touched area, the magnitude of the LGM interference signal gradually increases, resulting in a final capacitance change ΔC. 总 Almost disappeared.

[0357] The result, such as Figure 50a As shown, a low ground conductivity object creates an additional current path when the drive electrode and the receiver electrode are connected. The TX signal is transmitted to the RX electrode through this path, thus generating an LGM interference signal that is opposite to the normal touch signal.

[0358] Furthermore, as mentioned above, according to Figure 49a The electrode configuration of the touch sensor, with multiple identical receiving electrodes RX1 arranged in the touch window area S, results in a relatively increased amount of LGM interference signal generation. That is, it can be seen that... Figure 50b (a) The number of identical receiving electrodes RX1 disposed within the touch area is large, or as... Figure 50b In case (b) a large number of identical drive electrodes TX1 within the touch area, the LGM interference signal increases relatively. Therefore, it is preferable to reduce the number of such electrodes. Figure 50c (a) The number of identical receiving electrodes RX1 configured within the touch area or reduced as follows: Figure 50c (b) The number of identical drive electrodes TX1 configured within the touch area. For example, as... Figure 50d When all the receiving electrodes contained in the touch window area S are separated and connected to different channels, the aforementioned LGM interference signal can be reduced, thereby improving touch sensitivity.

[0359] See below Figures 51 to 62 The form of the touch sensor 10 for removing LGM interference signals according to an embodiment will be described.

[0360] Figure 51 This is an exemplary conceptual diagram illustrating a touch sensor according to an embodiment of the present invention. However... Figure 51The paper assumes that the receiving electrode and the receiving dummy electrode are physically separate and independent electrodes, but a part of the receiving electrode can also function as the receiving dummy electrode.

[0361] See Figure 51 The touch sensor according to an embodiment of the present invention includes a plurality of driving electrodes TX0 to TX7 and a plurality of receiving electrodes RX0 to RX7. The plurality of driving electrodes TX0 to TX7 and the plurality of receiving electrodes RX0 to RX7 may be formed in a single layer or in a double layer.

[0362] A touch sensor according to an embodiment of the present invention includes multiple driving electrodes TX0 to TX7 and multiple receiving electrodes RX0 to RX7, comprising nodes with mutual capacitance Cm formed between the multiple driving electrodes TX0 to TX7 and the multiple receiving electrodes RX0 to RX7, and nodes without mutual capacitance Cm formed.

[0363] For example, Figure 51 The nodes that form mutual capacitance Cm are (Tx0, Rx0), (Tx0, Rx1), (Tx0, Rx2), (Tx0, Rx3), (Tx1, Rx4), (Tx1, Rx5), (Tx1, Rx6), (Tx1, Rx7), (Tx2, Rx0), (Tx2, Rx1), (Tx2, Rx2), (Tx2, Rx3), (Tx3, Rx4), (Tx3, Rx5), (Tx3, Rx6), ( Tx3, Rx7), (Tx4, ​​Rx0), (Tx4, ​​Rx1), (Tx4, ​​Rx2), (Tx4, ​​Rx3), (Tx5, Rx4), (Tx5, Rx5), (Tx5, Rx6), (Tx5, Rx7), (Tx6, Rx0), (Tx6, Rx1), (Tx6, Rx2), (Tx6, Rx3), (Tx7, Rx4), (Tx7, Rx5), (Tx7, Rx6), (Tx7, Rx7).

[0364] The sensing signal output from the predetermined receiving electrode of the node forming the mutual capacitance Cm contains not only information about the amount of capacitance change caused by object touch, but also noise information. The noise information includes information about the amount of capacitance change caused by the LGM interference signal occurring in the floating state. Therefore, when the sensing signal received from each receiving electrode of the node forming the mutual capacitance Cm is converted into a predetermined level value for output, the output level value is a value reflecting both the mutual capacitance change information and the aforementioned noise information.

[0365] in addition, Figure 51The nodes that do not form mutual capacitance Cm are (Tx0, Rx4), (Tx0, Rx5), (Tx0, Rx6), (Tx0, Rx7), (Tx1, Rx0), (Tx1, Rx1), (Tx1, Rx2), (Tx1, Rx3), (Tx2, Rx4), (Tx2, Rx5), (Tx2, Rx6), (Tx2, Rx7), (Tx3, Rx0), (Tx3, Rx1), and (Tx3, Rx2). (Tx3, Rx3), (Tx4, ​​Rx4), (Tx4, ​​Rx5), (Tx4, ​​Rx6), (Tx4, ​​Rx7), (Tx5, Rx0), (Tx5, Rx1), (Tx5, Rx2), (Tx5, Rx3), (Tx6, Rx4), (Tx6, Rx5), (Tx6, Rx6), (Tx6, Rx7), (Tx7, Rx0), (Tx7, Rx1), (Tx7, Rx2), (Tx7, Rx3).

[0366] The sensing signal output from other predetermined receiving electrodes of a node that does not form a mutual capacitance Cm may contain only noise information. That is, in this case, other predetermined receiving electrodes can be used as receiving dummy electrodes.

[0367] Therefore, a touch input device according to an embodiment of the present invention, having such a touch sensor, can obtain information about the amount of capacitance change caused by object touch by subtracting the sensing signal (second sensing signal) output from other predetermined receiving electrodes of nodes that do not form mutual capacitance Cm from the sensing signal (first sensing signal) output from a predetermined receiving electrode of a node forming mutual capacitance Cm to remove the noise information. Thus, the digital value (or signal level value) corresponding to the final sensing signal obtained by subtracting the sensing signal output from other predetermined receiving electrodes of nodes that do not form mutual capacitance Cm from the sensing signal output from the predetermined receiving electrode of the node forming mutual capacitance Cm is a value based on information about the amount of capacitance change caused by object touch. As a result, the touch input device can output the same or nearly similar digital value even in a floating state and in a non-floating, normally grounded state.

[0368] See below Figures 52 to 57 Provide specific examples.

[0369] Figure 52 This is a conceptual diagram illustrating a touch sensor according to an embodiment of the present invention.

[0370] See Figure 52The touch sensor according to an embodiment of the present invention includes a plurality of driving electrodes TX0 to TX7 and a plurality of receiving electrodes RX0 to RX7. Mutual capacitance may be undetectable on at least a portion of the plurality of receiving electrodes RX0 to RX7.

[0371] Which of the multiple receiving electrodes RX0 to RX7 is used as a receiving dummy electrode depends on the driving electrode to which the driving signal is applied.

[0372] For example, when a drive signal is applied to the 0th drive electrode TX0, the 4th receiving electrode Rx4, the 5th receiving electrode Rx5, the 6th receiving electrode Rx6, and the 7th receiving electrode Rx7 among the plurality of receiving electrodes Rx0 to Rx7 are used as receiving dummy electrodes. In other words, when a drive signal is applied to the 0th drive electrode Tx0, the 4th, 5th, 6th, and 7th receiving electrodes Rx4, Rx5, Rx6, and Rx7 are used as receiving dummy electrodes that do not form a mutual capacitance Cm with the 0th drive electrode Tx0, and the 0th, 1st, 2nd, and 3rd receiving electrodes Rx0, Rx1, Rx2, and Rx3 become receiving electrodes that form a mutual capacitance Cm with the 0th drive electrode Tx0.

[0373] If a driving signal is applied to the driving electrode Tx1, then the 4th, 5th, 6th, and 7th receiving electrodes Rx4, Rx5, Rx6, and Rx7 become receiving electrodes that form a mutual capacitance Cm with the driving electrode Tx1, and the 0th, 1st, 2nd, and 3rd receiving electrodes Rx0, Rx1, Rx2, and Rx3 are used as receiving dummy electrodes that do not form a mutual capacitance Cm with the driving electrode Tx1.

[0374] A touch input device according to an embodiment of the present invention, having such a touch sensor, can subtract the sensing signals output from other predetermined receiving electrodes of nodes that do not form mutual capacitance Cm from the sensing signal output from a predetermined receiving electrode of a node forming mutual capacitance Cm to remove noise information, particularly information about capacitance changes caused by LGM interference signals. Furthermore, the touch input device according to an embodiment of the present invention can subtract the product of the sensing signals output from other predetermined receiving electrodes of nodes that do not form mutual capacitance Cm and a preset factor from the sensing signal output from the predetermined receiving electrode of the node forming mutual capacitance Cm.

[0375] Figure 53a This is a schematic diagram illustrating the case where a portion of the plurality of receiving electrodes of a touch sensor according to an embodiment is used as a receiving dummy electrode.

[0376] In particular, see Figure 53aWhen a driving signal is applied to the driving electrode Tx1, Rx4, Rx5, Rx6, and Rx7, which are arranged adjacent to the driving electrode Tx1, are used as predetermined receiving electrodes that form a mutual capacitance Cm with the driving electrode Tx1. Rx0, Rx1, Rx2, and Rx3, which are arranged at a predetermined distance from the driving electrode Tx1, can be defined as other predetermined receiving electrodes that do not form a mutual capacitance Cm with the driving electrode Tx1. Specifically, in Figure 53a The other predetermined receiving electrodes Rx0, Rx1, Rx2, and Rx3 used as the dummy receiving electrodes are required to satisfy the condition that they do not form mutual capacitance Cm with the driving electrode Tx1 at a predetermined distance, and are connected to different channels from the predetermined receiving electrodes Rx4, Rx5, Rx6, and Rx7. Connecting to different channels means connecting to a channel with an electrode number that does not overlap with the electrode number assigned to the predetermined receiving electrodes Rx4, Rx5, Rx6, and Rx7.

[0377] The sensing signals output from the predetermined receiving electrodes Rx4, Rx5, Rx6, and Rx7 contain not only information about the capacitance change caused by object touch, but also noise information. The noise information includes information about the capacitance change caused by the LGM interference signal occurring in the floating state. Therefore, when the sensing signals output from the receiving electrodes Rx4, Rx5, Rx6, and Rx7 are converted into a predetermined level value by the sensing unit 11 of the touch input device, the output level value reflects both the mutual capacitance change information and the aforementioned noise information.

[0378] Conversely, the sensing signals output from the other predetermined receiving electrodes Rx0, Rx1, Rx2, Rx3, which are used as receiving dummy electrodes, contain almost no information about the amount of capacitance change caused by object touch, but only the noise information.

[0379] Therefore, the pure mutual capacitance change value can be obtained by subtracting the signal value output from other predetermined receiving electrodes used as receiving dummy electrodes from the signal value output from the predetermined receiving electrode.

[0380] Especially in Figure 53a In this case, it can be achieved that the sum of the areas of other predetermined receiving electrodes used as receiving dummy electrodes is almost equal to the sum of the areas of the predetermined receiving electrodes.

[0381] This is because the magnitude of the detected signal is proportional to the area of ​​the electrode. Therefore, the purpose is to make the magnitude of the LGM interference signal detected from other predetermined receiving electrodes used as receiving dummy electrodes as as much as possible the magnitude of the LGM interference signal detected from the predetermined receiving electrodes, so as to completely remove the LGM interference signal during the LGM interference signal removal process.

[0382] In addition, Figure 53a In such cases, to ensure that the other predetermined receiving electrodes Rx0, Rx1, Rx2, and Rx3 used as dummy receiving electrodes contain almost no information about the capacitance change caused by object touch, any driving electrode disposed between the predetermined receiving electrodes Rx4, Rx5, Rx6, and Rx7 and the other predetermined receiving electrodes Rx0, Rx1, Rx2, and Rx3 used as dummy receiving electrodes can be grounded (GND). Alternatively, the predetermined receiving electrodes (RX4, RX5, RX6, RX7, etc.) can also be grounded (GND).

[0383] Figure 53b (shown) Figure 53a (Part of the example) can be applied in the same / similar way to Figure 53a The principle described above is followed, but with an additional physically independent receiving dummy electrode configured. Here, configuring a physically independent receiving dummy electrode means, in addition to... Figure 53a In addition to the receiving electrode, further configuration is provided. Therefore, in the case of a dummy receiving electrode, an additional trace corresponding to the receiving electrode is also added, thus... Figure 53a In comparison, the number of traces has increased.

[0384] In particular, see Figure 53b When a driving signal is applied to the driving electrode Tx1, the receiving electrodes Rx4 and Rx7, which are adjacent to the driving electrode Tx1, form a mutual capacitance Cm with the driving electrode Tx1. The receiving dummy electrodes Dummy RX1 and Dummy RX2, which are arranged at a predetermined distance from the driving electrode Tx1, do not form a mutual capacitance Cm with the driving electrode Tx1.

[0385] The sensing signals output from the predetermined receiving electrodes Rx4 and Rx7 contain not only information about the capacitance change caused by object touch, but also noise information. The noise information includes information about the capacitance change caused by the LGM interference signal occurring in the floating state. Therefore, when the sensing signals output from the receiving electrodes Rx4 and Rx7 are converted into a predetermined level value by the sensing unit 11 of the touch input device, the output level value reflects both the mutual capacitance change information and the aforementioned noise information.

[0386] Conversely, the sensing signals received from the dummy electrodes Dummy RX1 and Dummy RX2 contain no information about the amount of capacitance change caused by object touch, but only the noise information.

[0387] Therefore, the pure mutual capacitance change value can be obtained by subtracting the signal value output from the receiving dummy electrode from the signal value output from the predetermined receiving electrode.

[0388] exist Figure 53bIn this case, the dummy receiving electrodes Dummy RX1 and Dummy RX2 can be configured inside the receiving electrodes Rx4 and Rx7. The dummy receiving electrodes Dummy RX1 and Dummy RX2 can reduce the basic capacitance of the receiving electrodes Rx4 and Rx7. The dummy receiving electrodes Dummy RX1 and Dummy RX2 can be configured such that after the receiving electrodes Rx4 and Rx7 are formed with a metal mesh, a portion of the interior of the receiving electrodes Rx4 and Rx7 is disconnected or removed, so that the dummy receiving electrodes Dummy RX1 and Dummy RX2 and the receiving electrodes Rx4 and Rx7 are separated by a predetermined distance through the hole H.

[0389] Furthermore, in Figure 53a In this case, the dummy electrode and the receiving electrode are positioned at different locations, thus forming different touch coordinates. However, Figure 53b In this case, the coordinate center points of the dummy receiving electrode and the receiving electrode can be made consistent, thus compared to Figure 53a This configuration can more effectively remove LGM interference signals.

[0390] Furthermore, in Figure 53b In this case, the sum of the areas of the multiple receiving dummy electrodes Dummy RX1 and Dummy RX2 can be equal to the sum of the areas of the multiple receiving electrodes RX4 and RX7. The magnitude of the detected signal is proportional to the area of ​​the electrodes. Therefore, this is to make the magnitude of the LGM interference signal detected from the multiple receiving dummy electrodes Dummy RX1 and Dummy RX2 as similar as possible to the magnitude of the LGM interference signal detected from the multiple receiving electrodes RX4 and RX7, so as to completely remove the LGM interference signal during the LGM interference signal removal process.

[0391] Figure 54 This is a conceptual diagram illustrating a touch sensor based on an embodiment of the present invention, which uses a bridge structure.

[0392] *See also Figure 54 The touch sensor according to an embodiment of the present invention includes a plurality of driving electrodes TX0 to TX7 and a plurality of receiving electrodes RX0 to RX3. Furthermore, the touch sensor according to an embodiment of the present invention includes a plurality of dummy receiving electrodes RX0 to RX3.

[0393] A mutual capacitance Cm is formed between the multiple driving electrodes TX0 to TX7 and the multiple receiving electrodes RX0 to RX3, but no mutual capacitance Cm is formed between the multiple driving electrodes TX0 to TX7 and the multiple receiving dummy electrodes Dummy RX0 to Dummy RX3. In reality, a weak mutual capacitance can be formed between the multiple driving electrodes TX0 to TX7 and the multiple receiving dummy electrodes Dummy RX0 to Dummy RX3, but this weak mutual capacitance can be ignored when detecting touch.

[0394] A touch input device according to an embodiment of the present invention, having such a touch sensor, can remove noise information, particularly information about capacitance changes caused by LGM interference signals, by subtracting a second sensing signal from each receiving electrode of a node forming mutual capacitance Cm from a first sensing signal from a receiving electrode of a node forming mutual capacitance Cm. Furthermore, the touch input device according to an embodiment of the present invention can also subtract the product of the first sensing signal from each receiving electrode of a node forming mutual capacitance Cm and the second sensing signal from each receiving electrode of a node not forming mutual capacitance Cm, and a predetermined factor.

[0395] Figure 55 In order to be able to adopt Figure 54 The diagram shown is a conceptual diagram of a touch sensor and an example of the structure of a touch sensor.

[0396] See Figure 55 Multiple driving electrodes Tx0, Tx1, Tx2, and Tx3 are arranged in parallel along the horizontal direction, and multiple receiving electrodes Rx0 and Rx1 are arranged in parallel along the vertical direction.

[0397] Multiple driving electrodes Tx0, Tx1, Tx2, Tx3 and multiple receiving electrodes Rx0, Rx1 are rhomboid in shape, and adjacent driving electrodes and adjacent receiving electrodes are electrically connected to each other through conductive connection parts.

[0398] Multiple driving electrodes Tx0, Tx1, Tx2, Tx3 and multiple receiving electrodes Rx0, Rx1 can be implemented using a metal mesh. The conductive connections connecting the multiple driving electrodes Tx0, Tx1, Tx2, Tx3 can also be implemented using a metal mesh. These conductive connections can be implemented using either a metal mesh or conductive traces.

[0399] Each of the multiple driving electrodes Tx0, Tx1, Tx2, Tx3 and the multiple receiving electrodes Rx0, Rx1 has an internally electrically insulating predetermined pattern. The predetermined pattern may be formed to reduce the basic capacitance of each receiving electrode and each driving electrode. After each driving electrode and each receiving electrode is formed with a metal mesh, a portion of the metal mesh inside each driving electrode and each receiving electrode can be disconnected or removed to form the predetermined pattern. Here, each driving electrode and each receiving electrode and the predetermined pattern are separated by a predetermined distance via a hole H. The multiple receiving dummy electrodes Dummy RX0, Dummy RX1 may be formed by electrically connecting the predetermined patterns inside the multiple receiving electrodes Rx0, Rx1. The multiple receiving electrodes Rx0, Rx1 are extremely adjacent to the multiple driving electrodes Tx0, Tx1, Tx2, Tx3, thus forming a mutual capacitance Cm. However, the multiple receiving dummy electrodes Dummy RX0, Dummy RX1 are relatively far from the multiple driving electrodes Tx0, Tx1, Tx2, Tx3, therefore the mutual capacitance Cm formed is negligible.

[0400] Especially in Figure 55 In this case, the sum of the areas of the multiple dummy receiving electrodes Dummy RX0 and Dummy RX1 can be made equal to the sum of the areas of the multiple receiving electrodes RX0 and RX1. This is because the magnitude of the detected signal is proportional to the area of ​​the electrode. Therefore, this is to make the magnitude of the LGM interference signal detected from the multiple dummy receiving electrodes Dummy RX0 and Dummy RX1 as similar as possible to the magnitude of the LGM interference signal detected from the multiple receiving electrodes RX0 and RX1, so as to completely remove the LGM interference signal during the LGM interference signal removal process.

[0401] Furthermore, in Figure 53a In this case, the dummy electrode and the receiving electrode have the same area, but are positioned in different locations, thus forming different touch coordinates. However... Figure 55 In this case, the area of ​​the receiving dummy electrode and the receiving electrode are the same and the coordinate center points of each electrode are consistent, so that the LGM interference signal can be removed more effectively compared with the configuration in Figure 53.

[0402] In addition, Figure 55 In order to ensure that no information about the capacitance change caused by object touch is present in any of the dummy receiving electrodes (e.g., Dummy RX0, Dummy RX1), any receiving electrode (e.g., RX0, RX1) located between any driving electrode (e.g., TX3) and any dummy receiving electrode (e.g., Dummy RX0, Dummy RX1) can be grounded (GND).

[0403] Figure 56Another conceptual diagram illustrating a touch sensor based on an embodiment of the present invention, depicting a bridge structure. See also... Figure 56 The touch sensor according to an embodiment of the present invention includes a plurality of driving electrodes TX0 to TX3 and a plurality of receiving electrodes RX0 to RX7. Furthermore, the touch sensor according to an embodiment of the present invention includes a plurality of dummy driving electrodes Dummy Tx0 to Dummy Tx3.

[0404] A mutual capacitance Cm is formed between the multiple driving electrodes TX0 to TX3 and the multiple receiving electrodes RX0 to RX7, but no mutual capacitance Cm is formed between the multiple dummy driving electrodes Dummy Tx0 to Dummy Tx3 and the multiple receiving electrodes Rx0 to Rx7. In reality, a weak mutual capacitance can form between the multiple dummy driving electrodes Dummy Tx0 to Dummy Tx3 and the multiple receiving electrodes Rx0 to Rx7, but this weak mutual capacitance can be ignored when detecting touch.

[0405] A touch input device according to an embodiment of the present invention, having such a touch sensor, can subtract the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm from the sensing signals output from the receiving electrodes Rx of nodes that form mutual capacitance Cm to remove noise information, particularly information about capacitance changes caused by LGM interference signals. Alternatively, the product of the subtraction of the sensing signals output from the receiving electrodes Rx of nodes that do not form mutual capacitance Cm and a preset factor can be used.

[0406] Figure 57 In order to be able to adopt Figure 56 The diagram shown is a conceptual diagram of a touch sensor and an example of the structure of a touch sensor.

[0407] See Figure 57 Multiple receiving electrodes Rx0, Rx1, Rx2, and Rx3 are arranged in parallel along the horizontal direction, and multiple driving electrodes Tx0 and Tx1 are arranged in parallel along the vertical direction.

[0408] Multiple receiving electrodes Rx0, Rx1, Rx2, Rx3 and multiple driving electrodes Tx0, Tx1 are rhomboid in shape, and two adjacent driving electrodes and two adjacent receiving electrodes are electrically connected to each other through conductive connection parts.

[0409] Multiple receiving electrodes Rx0, Rx1, Rx2, Rx3 and multiple driving electrodes Tx0, Tx1 can be implemented as a metal mesh. The conductive connections connecting the multiple receiving electrodes Rx0, Rx1, Rx2, Rx3 can also be implemented as a metal mesh. These conductive connections can be implemented as either a metal mesh or conductive traces.

[0410] Each of the multiple receiving electrodes Rx0, Rx1, Rx2, Rx3 and the multiple driving electrodes Tx0, Tx1 has a predetermined electrically insulating pattern inside. The predetermined pattern may be formed to reduce the basic capacitance of each receiving and driving electrode. After each driving electrode and each receiving electrode is formed with a metal mesh, a portion of the metal mesh forming the predetermined pattern inside each driving electrode Tx0, Tx1 and each receiving electrode Rx0, Rx1, Rx2, Rx3 can be disconnected or removed. Here, each driving electrode Tx0, Tx1 and each receiving electrode Rx0, Rx1, Rx2, Rx3 and the predetermined pattern are separated by a predetermined distance via a hole H.

[0411] Multiple dummy driving electrodes, Tx0 and Tx1, can be formed by electrically connecting a predetermined pattern within the multiple driving electrodes Tx0 and Tx1. The multiple driving electrodes Tx0 and Tx1 and the multiple receiving electrodes Rx0, Rx1, Rx2, and Rx3 are extremely adjacent, thus forming a mutual capacitance Cm. However, the multiple dummy driving electrodes Tx0 and Tx1 are relatively far away from the multiple receiving electrodes Rx0, Rx1, Rx2, and Rx3, so the mutual capacitance Cm formed is negligible.

[0412] Especially in Figure 57 In this case, the sum of the areas of the multiple dummy driving electrodes Dummy Tx0 and Dummy Tx1 can be made almost equal to the sum of the areas of the multiple driving electrodes Tx0 and Tx1. This is because the magnitude of the detected signal is proportional to the area of ​​the electrode. Therefore, in order to make the magnitude of the LGM interference signal detected from the multiple dummy driving electrodes Dummy Tx0 and Dummy Tx1 as similar as possible to the magnitude of the LGM interference signal detected from the multiple driving electrodes Tx0 and Tx1, so as to completely remove the LGM interference signal during the LGM interference signal removal process.

[0413] Furthermore, in Figure 57 In this case, multiple dummy driving electrodes are implemented and the areas of the multiple driving electrodes are the same and the coordinate center points of each electrode are consistent, thereby more effectively removing LGM interference signals.

[0414] In addition, Figure 57In order to ensure that there is almost no information about the amount of capacitance change caused by object touch in any dummy drive electrode (e.g., DummyTX0, DummyTX1), any drive electrode (e.g., TX0, TX1) disposed between any receiver electrode (e.g., RX3) and any dummy drive electrode (e.g., DummyTX0, DummyTX1) can be grounded (GND).

[0415] Figure 58 In order to be able to adopt Figure 54 The diagram shown is a conceptual diagram of a touch sensor, and another example of the structure of a touch sensor.

[0416] See Figure 58 Multiple receiving electrodes Rx0, Rx1, and Rx2 are arranged in parallel along the horizontal direction, and multiple driving electrodes Tx0, Tx1, and TX2 are arranged in parallel along the vertical direction. The horizontal and vertical directions can be interchanged without any problem.

[0417] The multiple receiving electrodes Rx0, Rx1, Rx2 and the multiple driving electrodes Tx0, Tx1, Tx2 are each in bar shape.

[0418] Multiple receiving electrodes Rx0, Rx1, and Rx2 are formed on a first layer, and multiple driving electrodes Tx0, Tx1, and Tx2 are formed on a second layer. The first and second layers are not disposed on the same plane. For example, the first layer can be disposed on the second layer. An insulating layer can be disposed between the first and second layers.

[0419] Multiple receiving electrodes Rx0, Rx1, Rx2 and multiple driving electrodes Tx0, Tx1, Tx2 can be implemented by a metal mesh or a conductive metal.

[0420] Figure 58 The touch sensor shown includes multiple dummy electrodes, Dummy RX0, Dummy RX1, and Dummy RX2. These dummy electrodes are formed together on a layer containing multiple receiver electrodes Rx0, Rx1, and Rx2, and each dummy electrode can be configured between the receiver electrodes Rx0, Rx1, and Rx2.

[0421] Each driving electrode Tx0, Tx1, Tx2 includes a first region stacked with each receiving electrode Rx0, Rx1, Rx2 and a second region stacked with each receiving dummy electrode Dummy RX0, Dummy RX1, Dummy RX2. The size of the first region is larger than the size of the second region. In particular, it is preferable that the size of the second region is as small as possible. This is to minimize the mutual capacitance between the receiving dummy electrodes and the driving electrodes. Alternatively, if the receiving electrodes and receiving dummy electrodes have the same shape, the width of the first region stacked with the receiving electrodes in each driving electrode can be designed to be greater than the width of the second region stacked with the receiving dummy electrodes.

[0422] The areas where multiple driving electrodes Tx0, Tx1, Tx2 and multiple receiving electrodes Rx0, Rx1, Rx2 are stacked are relatively large, thus forming a relatively large mutual capacitance Cm. However, the areas where multiple dummy receiving electrodes Dummy RX0, Dummy RX1, Dummy RX2 and multiple driving electrodes Tx0, Tx1, Tx2 are stacked are relatively small, thus the mutual capacitance Cm formed between them is negligible.

[0423] Especially in Figure 58 In this case, the sum of the areas of the multiple dummy receiving electrodes Dummy RX0, Dummy RX1, and Dummy RX2 can be made almost equal to the sum of the areas of the multiple receiving electrodes RX0, RX1, and RX2. This is because the magnitude of the detected signal is proportional to the area of ​​the electrode. Therefore, in order to make the magnitude of the LGM interference signal detected from the multiple dummy receiving electrodes Dummy RX0, Dummy RX1, and Dummy RX2 as similar as the magnitude of the LGM interference signal detected from the multiple receiving electrodes RX0, RX1, and RX2, and thereby enable the complete removal of the LGM interference signal during the LGM interference signal removal process, the LGM interference signal can be removed.

[0424] In addition, Figure 58 In order to ensure that no information about the capacitance change caused by object touch is present in any of the dummy receiving electrodes (e.g., Dummy RX0, Dummy RX1, Dummy RX2), any receiving electrode (e.g., RX0, RX1, RX2) located between any driving electrode (e.g., TX0) and any dummy receiving electrodes (e.g., Dummy RX0, Dummy RX1, Dummy RX2) can be grounded (GND).

[0425] Figure 59 Applicable in the same / similar way Figure 58 The principle described is as follows, but this is an embodiment in which the dummy electrode is configured inside the receiving electrode.

[0426] exist Figure 59 In this case, the dummy receiving electrodes Dummy RX0, Dummy RX1, and Dummy RX2 can be configured inside the receiving electrodes RX0, RX1, and RX2. The dummy receiving electrodes Dummy RX0, Dummy RX1, and Dummy RX2 can reduce the basic capacitance of the receiving electrodes RX0, RX1, and RX2. The dummy receiving electrodes Dummy RX0, Dummy RX1, and Dummy RX2 can be configured such that after the receiving electrodes RX0, RX1, and RX2 are formed with a metal mesh, a portion of the interior of the receiving electrodes RX0, RX1, and RX2 is disconnected or removed, so that the dummy receiving electrodes Dummy RX0, Dummy RX1, and Dummy RX2 are separated from the receiving electrodes RX0, RX1, and RX2 by a predetermined distance.

[0427] exist Figure 59 In this case, each driving electrode Tx0, Tx1, Tx2 includes a first region stacked with each receiving electrode Rx0, Rx1, Rx2 and a second region stacked with each receiving dummy electrode Dummy RX0, Dummy RX1, Dummy RX2. The size of the first region is larger than the size of the second region. In particular, it is preferable that the size of the second region is as small as possible. This is to minimize the mutual capacitance between the receiving dummy electrode and the driving electrode. Alternatively, it can be designed such that, while the receiving electrode and the receiving dummy electrode have the same shape, the width of the first region stacked with the receiving electrode in each driving electrode is greater than the width of the second region stacked with the receiving dummy electrode.

[0428] The overlapping area of ​​multiple driving electrodes Tx0, Tx1, Tx2 and multiple receiving electrodes Rx0, Rx1, Rx2 is relatively large, thus forming a relatively large mutual capacitance Cm. However, the overlapping area of ​​multiple receiving dummy electrodes Dummy RX0, Dummy RX1, Dummy RX2 and multiple driving electrodes Tx0, Tx1, Tx2 is relatively small, so the mutual capacitance Cm formed between them is negligible.

[0429] Figure 60 In order to be able to adopt Figure 56 The diagram shown is a conceptual diagram of a touch sensor, and another example of the structure of a touch sensor.

[0430] See Figure 60 Multiple receiving electrodes Rx0, Rx1, and Rx2 are arranged in parallel vertically, while multiple driving electrodes Tx0, Tx1, and TX2 are arranged in parallel horizontally. The horizontal and vertical directions can be interchanged without issue.

[0431] The multiple receiving electrodes Rx0, Rx1, Rx2 and the multiple driving electrodes Tx0, Tx1, Tx2 are each in bar shape.

[0432] Multiple receiving electrodes Rx0, Rx1, and Rx2 are formed on a first layer, and multiple driving electrodes Tx0, Tx1, and Tx2 are formed on a second layer. The first and second layers are not disposed on the same plane. For example, the first layer can be disposed on the second layer. An insulating layer can be disposed between the first and second layers.

[0433] Multiple receiving electrodes Rx0, Rx1, Rx2 and multiple driving electrodes Tx0, Tx1, Tx2 can be implemented by a metal mesh or a conductive metal.

[0434] Figure 60 The touch sensor shown includes multiple dummy driving electrodes, Dummy TX0, Dummy TX1, and Dummy TX2. These dummy driving electrodes are formed together on a layer containing multiple driving electrodes Tx0, Tx1, and Tx2, and each dummy driving electrode can be configured between the driving electrodes Tx0, Tx1, and Tx2.

[0435] Each receiving electrode Rx0, Rx1, Rx2 includes a first region stacked with each driving electrode Tx0, Tx1, Tx2 and a second region stacked with each dummy driving electrode Dummy TX0, Dummy TX1, Dummy TX2. The area of ​​the first region is larger than the area of ​​the second region. In particular, it is preferable that the area of ​​the second region be as small as possible. This is to minimize the mutual capacitance between the dummy driving electrodes and the receiving electrodes. Alternatively, it can be designed such that, while the receiving electrodes have the same shape, the width of the first region where the driving and receiving electrodes are stacked is greater than the width of the second region where the dummy driving and receiving electrodes are stacked.

[0436] Each driving electrode Tx0, Tx1, and Tx2 has a relatively large overlapping area with each receiving electrode Rx0, Rx1, and Rx2, thus forming a relatively large mutual capacitance Cm. However, the overlapping area between each dummy driving electrode Dummy TX0, Dummy TX1, and Dummy TX2 and each receiving electrode Rx0, Rx1, and Rx2 is relatively small, so the mutual capacitance Cm formed between them is negligible.

[0437] In the application of this invention Figures 51 to 60 In the case of the aforementioned touch sensor 10, it is possible to obtain only the results from... Figure 36b A numerical value consisting solely of the magnitude of the change in mutual capacitance.

[0438] Figure 61 Example of the form of a touch sensor for removing LGM interference signals according to another embodiment of the present invention.

[0439] Figure 61 In the case of touch sensors, the same / similar application can be made to... Figures 35 to 3 The floating conditions described in 8 and Figure 39a The structure of the touch input device 1.

[0440] See Figures 49 and 50 again. Figure 49a Regarding the electrode configuration of the touch sensor, multiple identical receiving electrodes RX1 are arranged on the touch window area S, thus relatively increasing the amount of LGM interference signal generation. That is, it can be seen that... Figure 50b (a) The number of identical receiving electrodes RX1 disposed within the touch area is large, or as... Figure 50b In case (b) a large number of identical drive electrodes TX1 within the touch area, the LGM interference signal increases relatively. Therefore, it is preferable to reduce the number of such electrodes. Figure 50c (a) The number of identical receiving electrodes RX1 configured within the touch area or reduced as follows: Figure 50c (b) The number of identical drive electrodes TX1 configured within the touch area. For example, as... Figure 50d All receiving electrodes contained in the touch window area S are isolated and connected to different channels, which can reduce the aforementioned LGM interference signal and thus improve touch sensitivity.

[0441] Figure 61 Using this principle, the touch sensor 10 may include multiple driving electrodes, multiple first receiving electrodes and multiple second receiving electrodes disposed on a different layer from the multiple driving electrodes.

[0442] Multiple first receiving electrodes and multiple second receiving electrodes can be configured on the same layer.

[0443] Multiple first receiving electrodes may be formed in the first display area 151a, and multiple second receiving electrodes may be formed in the second display area 151b.

[0444] It can be implemented such that the area of ​​each of the multiple first receiving electrodes and the area of ​​each of the multiple second receiving electrodes are the same.

[0445] It is possible to make the area of ​​multiple first receiving electrodes and multiple second receiving electrodes smaller than the area of ​​multiple driving electrodes.

[0446] Therefore, multiple first receiving electrodes and multiple second receiving electrodes are each connected to different channels, thus increasing the number of receiving electrodes and channels, thereby reducing LGM interference signals. Figure 62 for Figure 61 The digital values ​​obtained by the touch sensor 10 when multiple touch inputs are applied show that, compared to Figure 36a There has been an improvement.

[0447] but Figure 61 The above principle can also be applied in the case of using multiple first receiving electrodes and multiple second receiving electrodes, according to another embodiment, when multiple first driving electrodes and multiple second driving electrodes are used.

[0448] That is, the above principle can be applied in the same or similar way when multiple first driving electrodes are formed in the first display area 151a and multiple second driving electrodes are formed in the second display area 151b.

[0449] The features, structures, effects, etc., described in the above embodiments are included in one embodiment of the present invention, but are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc., of the examples in each embodiment can be combined or modified by those skilled in the art to which the embodiments pertain. Therefore, it should be interpreted that such combinations and modifications are included within the scope of the present invention.

[0450] Furthermore, although the above description focuses on embodiments, these are merely examples and not intended to limit the invention. Those skilled in the art can make various modifications and applications not illustrated above without departing from the essential characteristics of these embodiments. For example, modifications can be made to the constituent elements specifically shown in the embodiments. Moreover, it should be understood that differences related to these modifications and applications are included within the scope of the invention as defined by the claims.

Claims

1. A touch input device, wherein, comprises: a touch sensor including a plurality of drive electrodes, a plurality of receive electrodes forming mutual capacitance with the plurality of drive electrodes, and a plurality of receive dummy electrodes not forming mutual capacitance with the plurality of drive electrodes; and a touch detection section including a plurality of receivers constituted by a plurality of first terminals receiving a plurality of first sense signals and a plurality of second terminals receiving a plurality of second sense signals, the touch detection section subtracting at least one second sense signal output through at least one second terminal from at least one first sense signal output through at least one first terminal of at least one receiver to detect a touch input of an object in a floating state, the at least one first sense signal including information of a change amount of mutual capacitance formed between at least one drive electrode and at least one receive electrode, and first noise information formed between at least one drive electrode and at least one receive electrode, The first noise information includes information related to a negative (C1) capacitance change amount caused by a first LGM disturbance signal occurring through coupling between the object and the reception electrode, ) the at least one second sense signal including second noise information formed between the at least one drive electrode and at least one receive dummy electrode, The second noise information includes information related to a negative (C2) capacitance change amount caused by a second LGM disturbance signal occurring through coupling between the object and the reception dummy electrode. ) the signs of the first LGM obstacle signal and the second LGM obstacle signal each being opposite to a sign of a signal generated when a touch input of an object in a normal state is detected.

2. The touch input device according to claim 1, wherein: further comprising a display module constituted by a first display region and a second display region, the touch sensor is formed on the display module, the touch sensor receives a plurality of touch inputs of the object to at least one of the first display region and the second display region, the touch detection section detects at least one of the plurality of touch inputs.

3. The touch input device of claim 2, wherein, further comprising: a first main body section supporting the first display region; a second main body section supporting the second display region; and a hinge section connecting the first main body section and the second main body section so that an angle constituted by the first main body section and the second main body section is variable.

4. The touch input device according to claim 3, wherein: the touch detection section detects at least one of the plurality of touch inputs when the touch input device is in an outwardly folded state.

5. The touch input device according to claim 4, wherein: the plurality of touch inputs include one first touch input to the first display region and a plurality of second touch inputs to the second display region, the touch detection section detects the one first touch input.

6. The touch input device according to claim 4, wherein: the plurality of touch inputs are a plurality of first touch inputs to the first display region or a plurality of second touch inputs to the second display region, the touch detection section detects the plurality of first touch inputs or the plurality of second touch inputs.

7. The touch input device according to claim 1, wherein: the plurality of receive dummy electrodes are respectively arranged inside each of the plurality of receive electrodes.

8. The touch input device according to claim 7, wherein: centers of the plurality of receive dummy electrodes each coincide with centers of the plurality of receive electrodes.

9. The touch input device according to claim 7, wherein: ​ The sum of the areas of the plurality of receiving dummy electrodes is the same as the sum of the areas of the plurality of receiving electrodes.

10. The touch input device according to claim 7, wherein: The plurality of receiving dummy electrodes are formed by removing a portion of the inside of the plurality of receiving electrodes.

11. The touch input device according to claim 7, wherein: The plurality of receiving electrodes are arranged between the plurality of driving electrodes and the plurality of receiving dummy electrodes, The plurality of receiving electrodes are set to be grounded.

12. The touch input device according to claim 1, wherein: The layer in which the plurality of receiving electrodes and the plurality of receiving dummy electrodes are arranged and the layer in which the plurality of driving electrodes are arranged are not the same layer, The first area in which the plurality of driving electrodes and the plurality of receiving electrodes are stacked is larger than the second area in which the plurality of driving electrodes and the plurality of receiving dummy electrodes are stacked.

13. The touch input device according to claim 12, wherein: The width of the first area is larger than the width of the second area.

14. The touch input device according to claim 1, wherein: Further comprising a display panel; The touch detection section includes: A driving section that applies a touch driving signal to the plurality of driving electrodes that is not synchronized (asynchronous) with a display driving signal applied in order to drive the display panel.

15. The touch input device according to claim 14, wherein: The driving section applies a touch driving signal having a first frequency to the plurality of driving electrodes, and when the value of noise output through the plurality of receiving dummy electrodes exceeds a predetermined threshold value, applies a touch driving signal having a second frequency that hops to a value different from the first frequency to the plurality of driving electrodes.

16. The touch input device according to claim 14, wherein: The at least one receiving electrode is arranged adjacent to the at least one driving electrode, The at least one receiving dummy electrode is arranged at a predetermined distance from the at least one driving electrode, The at least one receiving dummy electrode and the at least one receiving electrode are respectively connected to different channels.

17. A touch input device, wherein, Comprises: A touch sensor that includes a plurality of receiving electrodes, a plurality of driving electrodes that form mutual capacitance with the plurality of receiving electrodes, and a plurality of driving dummy electrodes that do not form mutual capacitance with the plurality of receiving electrodes; And A touch detection section that includes a plurality of receivers that are composed of a plurality of first terminals that receive a plurality of first sensing signals and a plurality of second terminals that receive a plurality of second sensing signals, The touch detection section subtracts at least one second sensing signal output through at least one second terminal from at least one first sensing signal output through at least one first terminal of at least one receiver to detect a touch input of an object in a floating state, The at least one first sensing signal includes information on the amount of change in mutual capacitance formed between at least one receiving electrode and at least one driving electrode, and first noise information formed between at least one receiving electrode and at least one driving electrode, The at least one second sensing signal includes information on the amount of change in mutual capacitance formed between at least one receiving dummy electrode and at least one driving electrode, and second noise information formed between at least one receiving dummy electrode and at least one driving electrode. The first noise information includes information related to a negative (C1) capacitance change amount caused by a first LGM disturbance signal occurring through coupling between the object and the drive electrode, ) The at least one second sensing signal includes second noise information formed between the at least one receiving electrode and at least one dummy driving electrode, The second noise information includes information related to a negative (C2) capacitance change amount caused by a second LGM disturbance signal occurring through coupling between the object and the dummy driving electrode, ) The first LGM interference signal and the second LGM interference signal each have a sign opposite to a sign of a signal generated when a touch input of the object in a normal state is detected.

18. The touch input device according to claim 17, wherein: a display module including a first display region and a second display region; the touch sensor is formed on the display module, the touch sensor receives a plurality of touch inputs of the object to at least one of the first display region and the second display region, the touch detection section detects at least one of the plurality of touch inputs.

19. The touch input device of claim 18, wherein, including: a first body section that supports the first display region; a second body section that supports the second display region; and a hinge section that connects the first body section and the second body section such that an angle formed by the first body section and the second body section is variable.

20. The touch input device according to claim 19, wherein: the touch detection section detects at least one of the plurality of touch inputs when the touch input device is in an outwardly folded state.

21. The touch input device according to claim 20, wherein: the plurality of touch inputs include one first touch input to the first display region and a plurality of second touch inputs to the second display region, the touch detection section detects the one first touch input.

22. The touch input device according to claim 20, wherein: the plurality of touch inputs are a plurality of first touch inputs to the first display region or a plurality of second touch inputs to the second display region, the touch detection section detects the plurality of first touch inputs or the plurality of second touch inputs. ​

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