Touch sensor and touch input device including the same

Abstract

The present invention relates to a touch input device, and more specifically to a touch input device including a touch sensor that can accurately detect whether an object input to a touch surface is touched and / or the touch position even when the touch input device is floating. The touch input device of an embodiment is a touch input device having a touch surface, including: a touch sensor disposed below the touch surface and including a plurality of drive electrodes, a plurality of receiving electrodes, and a plurality of virtual receiving electrodes; and a touch detection unit that detects the touch position of an object input to the touch surface based on sensing signals output from the plurality of receiving electrodes of the touch sensor, the touch detection unit detects the touch position of the object input to the touch surface by subtracting a second sensing signal output from a virtual receiving electrode that does not form a mutual capacitance with a predetermined driving electrode from a first sensing signal output from a predetermined receiving electrode that forms a mutual capacitance with an arbitrary driving electrode among the plurality of receiving electrodes.

Description

Technical Field

[0001] The present invention relates to a touch input device, and more particularly to a touch input device including a touch sensor capable of accurately detecting whether an object inputting to a touch surface is touched and / or a touch position even when the touch input device is floating. Background Art

[0002] Various input devices are used to operate a computing system. For example, input devices such as buttons, keys, joysticks, and touch screens are used. Since touch screens are simple and easy to operate, the utilization rate of touch screens in operating computing systems has increased.

[0003] A touch screen may constitute a touch surface of a touch input device including a touch sensor panel, which may be a transparent panel with a touch-sensitive surface. Such a touch sensor panel is attached to the front of a display screen, and the touch-sensitive surface may cover the visible surface of the display screen. A user may operate a computing system by simply touching the touch screen with a finger or the like. Typically, the computing system is able to recognize a touch and a touch location on the touch screen and interpret the touch, and then perform operations accordingly.

[0004] When the driving electrodes and the receiving electrodes are implemented as a single layer or a double layer, when a touch input device such as a smartphone equipped with a touch sensor is touched without being grasped by the hand (floating state), LGM (low ground mass) causes the signal that should be sensed to disappear or the signal that should be sensed to be split, resulting in the appearance of signals indicating that touch has occurred in two or more locations. Summary of the invention

[0005] Technical issues

[0006] The technical problem to be solved by the present invention is to provide a touch sensor and a touch input device including the same, which enables the touch input device to sense a touch signal when the touch input device is in a floating state, which is the same as or similar to that in a gripping state.

[0007] Furthermore, a touch sensor capable of recognizing two or more multi-touches even when the touch input device is in a floating state and a touch input device including the same are provided.

[0008] Furthermore, a method is provided to be able to recognize a third touch (3 rd A touch sensor for Touch and a touch input device including the same.

[0009] Technical Solution

[0010] A touch input device of an embodiment is a touch input device having a touch surface, comprising a touch sensor arranged below the touch surface and comprising a plurality of drive electrodes, a plurality of receiving electrodes and a plurality of virtual receiving electrodes; and a touch detection unit that detects a touch position of an object input to the touch surface based on sensing signals output from the plurality of receiving electrodes of the touch sensor, the touch detection unit detecting the touch position of the object input to the touch surface by subtracting a second sensing signal output from a virtual receiving electrode that does not form a mutual capacitance with the drive electrode from a first sensing signal output from a predetermined receiving electrode that forms a mutual capacitance with any drive electrode among the plurality of receiving electrodes.

[0011] A touch input device in another embodiment is a touch input device having a touch surface, comprising a touch sensor arranged below the touch surface and comprising a plurality of drive electrodes, a plurality of receiving electrodes and a plurality of virtual drive electrodes; and a touch detection unit for detecting a touch position of an object input to the touch surface based on sensing signals output from the plurality of receiving electrodes of the touch sensor, the touch detection unit detecting the touch position of the object input to the touch surface by subtracting a second sensing signal output from a predetermined receiving electrode that forms a mutual capacitance with a predetermined drive electrode from a first sensing signal output from a predetermined receiving electrode that forms a mutual capacitance with a predetermined drive electrode among the plurality of receiving electrodes from a second sensing signal output from a predetermined receiving electrode that does not form a mutual capacitance with a predetermined virtual drive electrode among the plurality of receiving electrodes.

[0012] A touch input device in another embodiment is a touch input device having a touch surface, comprising a touch sensor including a plurality of driving electrodes and a plurality of receiving electrodes arranged below the touch surface; and a touch detection unit that detects a touch position of an object input to the touch surface based on sensing signals output from the plurality of receiving electrodes of the touch sensor; the touch detection unit detects the touch position of the object input to the touch surface by subtracting a second sensing signal output from another predetermined receiving electrode among the plurality of receiving electrodes that does not form a mutual capacitance with the driving electrode from a first sensing signal output from a predetermined receiving electrode that forms a mutual capacitance with the predetermined driving electrode among the plurality of receiving electrodes.

[0013] A touch sensor in one embodiment includes a plurality of driving electrodes; a plurality of receiving electrodes, which are electrically insulated from the plurality of driving electrodes and form mutual capacitance with the plurality of driving electrodes; and a plurality of virtual receiving electrodes, which are electrically insulated from the plurality of driving electrodes and the plurality of receiving electrodes and do not form mutual capacitance with the plurality of driving electrodes. When a driving signal is applied through a predetermined driving electrode among the plurality of driving electrodes, a first sensing signal output from a predetermined receiving electrode among the plurality of receiving electrodes includes information on a change in mutual capacitance between the predetermined driving electrode and the predetermined receiving electrode and noise information, and a second sensing signal output from a predetermined virtual receiving electrode among the plurality of virtual receiving electrodes includes the noise information, and the noise information includes information on a negative (-) capacitance change caused by an LGM interference signal that occurs through coupling between an object and the predetermined driving electrode.

[0014] A touch sensor in another embodiment includes a plurality of driving electrodes; a plurality of virtual driving electrodes electrically insulated from the plurality of driving electrodes; and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes and the plurality of virtual driving electrodes and forming mutual capacitance with the plurality of driving electrodes, but not forming the mutual capacitance with the plurality of virtual driving electrodes, wherein predetermined receiving electrodes among the plurality of receiving electrodes output a first sensing signal and a second sensing signal, wherein the first sensing signal includes information on a change in mutual capacitance between the predetermined receiving electrode and a predetermined driving electrode among the plurality of driving electrodes and noise information, and the second sensing signal includes the noise information, wherein the noise information includes information on a negative (-) capacitance change caused by an LGM interference signal occurring through coupling between an object and the predetermined driving electrode.

[0015] A touch sensor in another embodiment includes a plurality of driving electrodes; and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes. When a driving signal is applied through a predetermined driving electrode among the plurality of driving electrodes, a first sensing signal output from a first receiving electrode among the plurality of receiving electrodes that forms a mutual capacitance with the predetermined driving electrode includes information on a change in mutual capacitance between the predetermined driving electrode and the first receiving electrode and noise information, and a second sensing signal output from a second receiving electrode among the plurality of receiving electrodes that does not form the mutual capacitance with the predetermined driving electrode includes the noise information, and the noise information includes information on a negative (-) capacitance change caused by an LGM interference signal that occurs through coupling between an object and the predetermined driving electrode.

[0016] Technical Effects

[0017] When the touch sensor and the touch input device including the same according to the embodiment of the present invention are used, there is an advantage that when the touch input device is in a floating state, a touch signal can be sensed in the same or similar manner as in a gripping state.

[0018] Furthermore, it has the advantage of being able to recognize two or more multi-touches even when the touch input device is in a floating state.

[0019] Furthermore, the present invention has a function of being able to recognize a third touch (3 rd Touch). BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 1 is a schematic diagram of a touch sensor 10 in a general touch input device and its working structure;

[0021] Figures 2 to 3 is an illustrative diagram of a touch sensor having a double-layer structure;

[0022] Figure 4 (a) to (f) are exemplary cross-sectional structural diagrams of a touch input device having a touch sensor;

[0023] Figures 5 and 6 To illustrate the Figure 2 or / and Figure 3 Output data of the reason why the LGM interference signal is generated in the touch input device of the touch sensor shown;

[0024] Figures 7 and 8 A schematic diagram for explaining the principle of generating an LGM interference signal when a touch input device having a touch sensor configured as a double layer (2layer) is in a floating state;

[0025] Fig. 9 To show Figure 1 The touch sensor 10 shown is a schematic diagram of an example of a single layer (1 layer);

[0026] Fig.10 for Figure 1 The touch sensor 10 shown is another example of a single-layer (1 layer) structure, and is a schematic diagram of only a portion being enlarged;

[0027] Fig.11 (a) and (b) have Fig.10 When a specific portion of the touch surface of the touch input device of the touch sensor structure shown in the figure comes into contact with an object such as a thumb, the touch input device outputs raw data;

[0028] Fig.12 yes Figure 1 The touch sensor 10 shown is another example of being formed as a single layer (1 layer), and is a schematic diagram of only an enlarged portion;

[0029] Fig.13 To have Fig.12 Raw data when a specific portion of a touch surface of a touch input device having a touch sensor structure is in contact with an object such as a thumb;

[0030] Fig.14 For a rough comparison Fig.10 and Fig.12 A graph of LGM performance of the touch sensor shown;

[0031] Fig.15 for Figure 1 The touch sensor 10 shown is formed as another embodiment of a single layer (1 layer), which is a schematic diagram of only an enlarged portion;

[0032] Fig.16 for Figure 1 The touch sensor 10 shown is another example of being formed as a single layer (1 layer), and is a schematic diagram of only an enlarged portion;

[0033] Fig.17 An exemplary conceptual diagram conceptualizing a touch sensor according to an embodiment of the present invention;

[0034] Fig.18 For the general Fig.12 A conceptual diagram showing a touch sensor conceptualized according to an embodiment of the present invention;

[0035] Fig.19 For illustration Fig.12 An exemplary diagram of an electrode used as a virtual receiving electrode among a plurality of receiving electrodes of the touch sensor;

[0036] Fig. 20 (a) to (c) are Fig.12 An exemplary diagram showing raw data output by a touch input device of a touch sensor according to an embodiment of the present invention;

[0037] Fig.21 A conceptual diagram conceptualizing a touch sensor according to an embodiment of the present invention having a bridge structure;

[0038] Fig. 22 To be applicable Fig.21 A diagram showing a configuration of a touch sensor as an example of a conceptual diagram of a touch sensor;

[0039] Fig.23 Another conceptual diagram conceptualizing a touch sensor according to an embodiment of the present invention having a bridge structure;

[0040] Fig.24 To be applicable Fig.23A diagram showing a configuration of a touch sensor as an example of a conceptual diagram of a touch sensor;

[0041] Fig.25 To be applicable Fig.21 A diagram showing the structure of a touch sensor of another example of the conceptual diagram of the touch sensor shown;

[0042] Fig.26 To be applicable Fig.23 A diagram showing the structure of a touch sensor of another example of the conceptual diagram of the touch sensor shown;

[0043] Fig. 27 When testing with a 15φ conductive rod, Fig.10 The touch input device of the touch sensor shown outputs raw data in a gripping state and a floating state respectively;

[0044] Fig.28 When testing with a 15φ conductive rod, Fig.12 The touch input device of the touch sensor of the embodiment of the present invention outputs raw data in a gripping state and a floating state respectively;

[0045] Fig.29 When testing with a 20φ conductive rod, Fig.10 The touch input device of the touch sensor shown outputs raw data in a gripping state and a floating state respectively;

[0046] Fig.30 When testing with a 20φ conductive rod, Fig.12 The touch input device of the touch sensor of the embodiment of the present invention outputs raw data in a gripping state and a floating state respectively;

[0047] Fig.31 When tested with a human thumb, Fig.10 The touch input device of the touch sensor shown outputs raw data in a gripping state and a floating state respectively;

[0048] Fig.32 When tested with a human thumb, Fig.12 The touch input device of the touch sensor of the embodiment of the present invention outputs raw data in a gripping state and a floating state respectively;

[0049] Fig.33 A schematic diagram showing that when the conventional touch input device is in a floating state, it is unable to recognize multi-touch caused by multiple objects;

[0050] Fig.34 (a) to (c) are raw data for illustrating that the touch input device according to the embodiment of the present invention recognizes multi-touch;

[0051] Fig.35 A schematic diagram showing that when a cross touch and a third touch are simultaneously applied to a touch surface of a conventional touch input device, the third touch cannot be recognized;

[0052] Fig.36 (a) to (c) are raw data for explaining that the touch input device according to the embodiment of the present invention recognizes a cross touch and a third touch. DETAILED DESCRIPTION

[0053] The present invention is described in detail below with reference to the accompanying drawings that illustrate specific embodiments that can implement the present invention. These embodiments are described in detail so that those skilled in the art can implement the present invention. It should be understood that the various embodiments of the present invention are different, but do not need to be mutually exclusive. For example, the specific shapes, structures and features described herein can be implemented by other embodiments without exceeding the spirit and scope of the present invention in one embodiment. In addition, it should be understood that the position or configuration of the individual constituent elements in each disclosed embodiment can be changed without exceeding the spirit and scope of the present invention. Therefore, the following specific description is not for the purpose of limitation. If properly stated, the scope of the present invention is limited to all scopes and claims equivalent to the claims. Similar figure marks in the drawings represent the same or similar functions in various aspects.

[0054] A touch sensor and a touch input device including the same according to an embodiment of the present invention will be described below with reference to the drawings. A capacitive touch sensor 10 is exemplified below, but the same or similar embodiments can be applied to a touch sensor 10 that can detect a touch position in any manner.

[0055] Figure 1 FIG. 1 is a schematic diagram of a touch sensor 10 in a general touch input device and its working structure.

[0056] See also Figure 1 , the touch sensor 10 includes a pattern of a predetermined shape, and the predetermined pattern may include a plurality of driving electrodes TX0 to TXn and a plurality of receiving electrodes RX0 to RXm.

[0057] In order for the touch sensor to operate, it may include a driving unit 12 that applies a driving signal to a plurality of driving electrodes TX0 to TXn and a sensing unit 11 that receives a sensing signal including information about the amount of capacitance change as the touch surface is touched from a plurality of receiving electrodes RX0 to RXm to detect a touch and a touch position.

[0058] Figure 1The plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm of the touch sensor 10 are shown to form an orthogonal array, but the present invention is not limited thereto, and the plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm may have any dimension and application arrangement such as diagonal lines, concentric circles, and three-dimensional random arrangement. Wherein, n and m are positive integers, and may have the same or different values, and may vary according to the implementation.

[0059] The plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm may be as follows. Figures 2 to 3 The driving electrodes TX may include a plurality of driving electrodes TX0 to TXn extending in a first axis direction, and the receiving electrodes RX may include a plurality of receiving electrodes RX0 to RXm extending in a second axis direction intersecting the first axis direction.

[0060] The plurality of driving electrodes TX0 to TXn and the plurality of receiving electrodes RX0 to RXm may be as follows. Figures 2 to 3 Formed in different double layers (2layer). For example, it can be Figure 2 The bar pattern shown can be Figure 3 The diamond pattern shown in FIG. 1 is a diamond pattern. The layer formed with the plurality of driving electrodes TX0 to TXn may be arranged on the layer formed with the plurality of receiving electrodes RX0 to RXm, or vice versa. An insulating layer may be formed between the two layers to prevent short circuits between the plurality of driving electrodes and the plurality of receiving electrodes.

[0061] The touch sensor 10 including a plurality of driving electrodes TX0 to TXn and a plurality of receiving electrodes RX0 to RXm is as shown in FIG. Figure 4 As shown in (a), it can be configured between the cover layer 100 and the display panel 200A together with the OCA configured on the upper / lower side (Add-on). Figure 4 As shown in (b), the touch sensor 10 can be directly configured on the display panel 200A (for example, on the encapsulation layer (encapsulation layer) of the display panel 200A). In addition, the touch sensor 10 including a plurality of driving electrodes TX0 to TXn and a plurality of receiving electrodes RX0 to RXm is as shown in FIG. Figure 4 As shown in (c), it can be configured inside the display panel 200A (for example, between the encapsulation layer and the organic light-emitting layer of the display panel 200A) (in-cell).

[0062] Figure 4In (a) to (c), the display panel 200A may be a rigid OLED panel or a flexible OLED panel. In the case of a rigid OLED panel, the encapsulation layer and the TFT layer may be formed of glass, and in the case of a flexible OLED panel, the encapsulation layer may be formed of a thin film, and the TFT layer may be formed of a PI film.

[0063] in addition, Figure 4 The display panel 200A shown in (a) to (c) is an OLED panel, but is not limited thereto. Figure 4 As shown in (d) to (f) of FIG. 1 , the display panel 200B may also be an LCD panel. The characteristic of the LCD panel is that a backlight unit (BLU) 250 is disposed under the display panel 200B.

[0064] Specifically, if Figure 4 As shown in (d), the touch sensor 10 may be attached (Add-on) to the cover window glass 100. Although not shown in the figure, the touch sensor 10 may be attached to the cover window glass 100 in the form of a film. Figure 4 As shown in (e), the touch sensor 10 can be formed (on-cell) on the color filter glass (Color Filter Glass) of the display panel 200B. Here, the touch sensor 10 can be formed on the color filter glass as shown in the figure. Although not shown in the figure, the touch sensor 10 can also be formed under the color filter glass. Figure 4 As shown in (f), the touch sensor 10 can be formed (in-cell) in the TFT layer (TFT array). Here, the touch sensor 10 can also be formed on the TFT layer (TFT array) as shown in the figure. Although not shown in the figure, the touch sensor 10 can also be formed below the TFT layer (TFT array). In addition, although not shown in the figure, one of the driving electrode and the receiving electrode can be formed on the color filter glass of the display panel 200B, and the other one can be formed on the TFT layer.

[0065] See again Figure 1, multiple driving electrodes TX0 to TXn and multiple receiving electrodes RX0 to RXm can be formed of transparent conductive materials (for example, indium tin oxide (ITO: Indium Tin Oxide) or antimony tin oxide (ATO: Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is just an example, and the driving electrode TX and the receiving electrode RX can also be formed of other transparent conductive materials or non-transparent conductive materials. For example, the driving electrode TX and the receiving electrode RX can be composed of at least any one of silver ink, copper, nano silver and carbon nanotube (CNT: Carbon Nanotube). In addition, the driving electrode TX and the receiving electrode RX can be composed of a metal mesh.

[0066] The driving unit 12 may apply a driving signal to the driving electrodes TX0 to TXn. The sensing unit 11 may receive a sensing signal including information about the amount of change in the mutual capacitance Cm14 generated between the driving electrodes TX0 to TXn to which the driving signal is applied and the receiving electrodes RX0 to RXm through the receiving electrodes RX0 to RXm to detect whether a touch is made and the touch position. The sensing signal includes not only a signal in which the driving signal applied to the driving electrode TX is coupled by the mutual capacitance Cm14 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 generated by the change of the image displayed on the display, and information about the LGM interference signal (e.g., negative capacitance change) generated in a floating state.

[0067] The sensing unit 11 may include a receiver (not shown) connected to each receiving electrode RX0 to RXm through a switch. The switch is turned on during the period of sensing the signal of the corresponding receiving electrode RX so that the receiver can sense the sensing signal from the receiving electrode RX. The receiver may be configured to include an amplifier (not shown) and a feedback capacitor that is combined between the negative (-) input terminal of the amplifier and the output terminal of the amplifier, that is, the feedback path. Here, the positive (+) input terminal of the amplifier may be connected to ground. In addition, the receiver may further include a reset switch connected in parallel with the feedback capacitor. The reset switch may reset the conversion from current to voltage performed by the receiver. The negative input terminal of the amplifier is connected to the corresponding receiving electrode RX, and may be converted into a voltage by integration after receiving a current signal including information about the capacitor Cm 14. The sensing unit 11 may further include an analog-to-digital converter (not shown, analog to digital converter, ADC) that converts the data integrated by the receiver into a digital value. Subsequently, the digital data is input to a processor (not shown) and can be processed to obtain touch information for the touch sensor 10. The sensing unit 11 may include an ADC and a processor in addition to the receiver.

[0068] The control unit 13 can perform the function of controlling the actions of the driving unit 12 and the sensing unit 11. For example, the control unit 13 can generate a driving control signal and send it to the driving unit 12 so that the driving signal is applied to the preset driving electrode TX at a predetermined time. In addition, the control unit 13 can generate a sensing control signal and send it to the sensing unit 11 so that the sensing unit 11 receives the sensing signal from the preset receiving electrode RX at a predetermined time and performs a preset function.

[0069] exist Figure 1 In the figure, the driving unit 12 and the sensing unit 11 may constitute a touch detection unit (not shown) capable of detecting whether the touch sensor 10 is touched and the touch position. In addition, the touch detection unit may further include a control unit 13. The touch detection unit may be integrated into a touch sensing IC (touch sensing integrated circuit). The driving electrode TX and the receiving electrode RX included in the touch sensor 10 may be connected to the driving unit 12 and the sensing unit 11 included in the touch sensing IC, for example, via a conductive trace and / or a conductive pattern printed on a circuit board. The touch sensing IC may be located on a circuit board printed with a conductive pattern, for example, on a touch circuit board (hereinafter referred to as a "touch PCB"). According to an embodiment, the touch sensing IC may be mounted on a mainboard for the operation of a touch input device.

[0070] As described above, each intersection of the driving electrode TX and the receiving electrode RX generates a predetermined capacitance Cm, and the value of the capacitance can change when an object such as a finger approaches the touch sensor 10. Figure 1 In the embodiment, the capacitance may represent mutual capacitance (Cm). The sensing unit 11 may sense whether the touch sensor 10 is touched and / or the touch position by sensing such electrical characteristics. For example, it may sense whether the surface of the touch sensor 10 formed by a two-dimensional plane formed by a first axis and a second axis is touched and / or its position.

[0071] Figures 5 and 6 To illustrate the Figure 2 or / and Figure 3 The touch input device of the touch sensor generates output data indicating the reason for the LGM interference signal.

[0072] Figure 5 The object touches the touch input device under normal circumstances. Figure 2 or Figure 3 When the touch input device shown in the figure touches a specific portion of the touch surface, the sensing signals outputted through the receiving electrodes RX0 to RX33 are converted into data of digital values ​​(or signal level values). Figure 6 The touch input device is shown in a floating state when the customer touches the Figure 2 or Figure 3 In the case of touching the specific portion of the touch surface of the touch input device, the sensing signals output through the receiving electrodes RX0 to RX33 are converted into data of digital values ​​(or signal level values).

[0073] like Figure 5 As shown in FIG. 1 , the area where the digital values ​​having relatively large values ​​are distributed among the digital values ​​output under normal circumstances is located in the central part. Figure 6 As shown, the digital value of the central part in the floating state is compared with Figure 5 has a completely different look. That is, Figure 6 The digital value in the center portion has a relatively low value. In this case, although the user actually touches the touch surface of the touch input device once (or a large touch), the touch input device may mistakenly recognize that the one touch has not occurred or that two or more touches have occurred. This is because the LGM caused by the coupling between the object and the drive electrode interferes with the amount of negative (-) capacitance change caused by the signal.

[0074] like Figure 5The normal situation shown is the situation where the user touches the touch surface of the touch input device with a finger while gripping the touch input device, and the finger plays a normal grounding role. Figure 6 The floating state shown illustrates a situation where the touch input device is placed on the ground or on a stand (eg, a stand inside a car) and the user touches the touch surface of the touch input device with a finger, so that the finger cannot function as a normal ground connection.

[0075] See below Figures 7 to 9 Specific instructions Figure 6 The reason why the digital value (or signal level value) output by the touch input device in the floating state is different from the digital value (or signal level value) output in the normal state is described.

[0076] Figures 7 and 8 This is a schematic diagram for explaining the principle of generating an LGM interference signal in a floating state by a touch input device having a touch sensor configured as a double layer. For reference, in the following description, an object may include a finger or a stylus pen.

[0077] See also Figures 7 and 8 In any cell area (including the multiple driving electrodes and multiple receiving electrodes included in the dotted area), the amount of the signal sensed when the ground quality is low (LGM, Low Ground Mass, hereinafter referred to as LGM) (hereinafter referred to as 'LGM interference signal') increases relatively. Figure 6 As shown, the sensing signal and the corresponding digital value finally outputted are reduced. In particular, in the case of a big touch (in the present invention, a touch area of ​​a thumb having a wider area than the touch areas of other fingers is defined as a big touch), the LGM interference signal is relatively increased.

[0078] LGM hinders the signal Figures 7 and 8 As shown, when an object touches the touch surface of the touch input device in a floating state, in addition to generating the mutual capacitance △Cm between the driving electrode and the receiving electrode, a coupling capacitance (C1, C2 or CLGM) also occurs between the object and the driving electrode Tx and / or the receiving electrode Rx.

[0079] Fig. 9 for Figure 1 The touch sensor 10 shown is a schematic diagram of an example in which the touch sensor 10 is configured as a single layer (1 layer).

[0080] See also Fig. 9 , Figure 1The plurality of driving electrodes TX0 to TXm and the plurality of receiving electrodes RX0 to RXm are formed in one layer. For example, a group of a plurality of driving electrodes Tx adjacent to a rectangular receiving electrode Rx may be arranged in a plurality of rows and columns. Here, the number of driving electrodes Tx adjacent to a rectangular receiving electrode Rx may be four as shown in the figure, but is not limited thereto. For example, the number of driving electrodes Tx may be three, two, or more than five. Furthermore, the driving electrodes Tx and the receiving electrodes Rx may also be configured inversely.

[0081] With Fig. 9 The touch input device of the touch sensor 10 of the single-layer structure shown in FIG. 1 is also configured according to the gripping state and the floating state. Figure 5 and Figure 6 This is because the object is located at the lower ground mass (LGM) in the floating state.

[0082] More specifically, the driving signal applied by a specific driving electrode is input to a plurality of receiving electrodes RX in contact with the object through an object in the LGM state. That is, the object in the LGM state forms a current path. Therefore, an LGM interference signal (-diff) having a sign opposite to that of a normal touch signal is output from each receiving electrode in contact with the object. The reason why the LGM interference signal has a sign opposite to that of a normal touch signal is that the mutual capacitance Cm decreases when the object makes contact in a state where a predetermined mutual capacitance Cm is formed between the driving electrode and the receiving electrode in the normal touch signal, while the LGM interference signal generates a coupling capacitance due to contact with the object in a floating state, and therefore has an opposite sign. Therefore, the LGM interference signal occurring in the floating state becomes a factor that reduces the digital value (or signal level value) corresponding to the sensing signal output through each receiving electrode.

[0083] See below Fig.10 and Fig.12 A more specific example of a touch sensor having a single-layer structure will be described, and raw data output by a touch input device having each touch sensor in a floating state will be described.

[0084] Fig.10 for Figure 1 The touch sensor 10 shown is another example formed as a single layer (1 layer), and is a schematic diagram in which only a portion is enlarged.

[0085] See also Fig.10 The touch sensor includes a plurality of driving electrodes TX and a plurality of receiving electrodes RX. The plurality of driving electrodes TX and the plurality of receiving electrodes RX are arranged in a matrix form on the same layer.

[0086] The plurality of driving electrodes TX and the plurality of receiving electrodes RX may be formed of a transparent conductive material (e.g., indium tin oxide (ITO: Indium Tin Oxide) or antimony tin oxide (ATO: Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is only an example, and the driving electrodes TX and the receiving electrodes RX may also be formed of other transparent conductive materials or non-transparent conductive materials. For example, the driving electrodes TX and the receiving electrodes RX may be formed to contain at least any one of silver ink, copper, nano silver, and carbon nanotubes (CNT: Carbon Nanotube).

[0087] Furthermore, the driving electrode TX and the receiving electrode RX may be implemented by a metal mesh. When the driving electrode TX and the receiving electrode RX are implemented by a metal mesh, the wiring connected to the driving electrode TX and the receiving electrode RX may also be implemented by a metal mesh, and the driving electrode TX and the receiving electrode RX and the wiring may also be implemented as a whole by the metal mesh. When the driving electrode TX and the receiving electrode RX and the wiring are implemented as a whole by the metal mesh, the dead zone where the touch position cannot be sensed, such as between the electrode and the wiring and / or between the electrode and other electrodes, is reduced, thereby further improving the touch position detection sensitivity.

[0088] The touch sensor is arranged based on a plurality of receiving electrodes RX. Therefore, the arrangement structure of the plurality of receiving electrodes RX arranged in columns B1 to B8 is first described below, and then the arrangement structure of the plurality of driving electrodes TX is described.

[0089] The plurality of receiving electrodes RX are arranged in plurality in each of the plurality of columns B1, B2, B3, B4, B5, B6, B7, and B8. The plurality of driving electrodes TX are arranged in plurality in the plurality of columns A1, A2, A3, A4, A5, A6, A7, and A8 formed between the columns B1, B2, B3, B4, B5, B6, B7, and B8 in which the receiving electrodes RX are arranged, and outside the first column B1 and outside the eighth column B8.

[0090] Taking each receiving electrode RX of the plurality of receiving electrodes RX as a reference, two adjacent driving electrodes TX on both sides are the same. That is, taking each receiving electrode RX as a reference, two adjacent driving electrodes TX on both sides have the same number. The two driving electrodes TX being the same or the two driving electrodes TX having the same number means that they are electrically connected to each other through wiring.

[0091] The touch sensor includes one or more sets of a plurality of receiving electrodes RX and a plurality of driving electrodes TX arranged in a predetermined arrangement. The plurality of sets may be repeatedly arranged in a column direction.

[0092] A set may include different multiple receiving electrodes RX, for example, a set may include 16 receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7, RX8, RX9, RX10, RX11, RX12, RX13, RX14, RX15. The 16 receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7, RX8, RX9, RX10, RX11, RX12, RX13, RX14, RX15 may be configured in a predetermined arrangement. The 16 receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7 may be arranged in two rows in a row direction. Therefore, 8 receiving electrodes may be arranged in each of the two rows. In the first row, the receiving electrodes numbered 0 to 7 are arranged from left to right in the order of RX0, RX1, RX2, RX3, RX4, RX5, RX6, RX7, and in the second row, the receiving electrodes numbered 8 to 15 are arranged from left to right in the order of RX15, RX14, RX13, RX12, RX11, RX10, RX9, RX8.

[0093] In addition, the touch sensor panel includes a plurality of driving electrodes TX, for example, the plurality of driving electrodes TX may include a 0th driving electrode TX0 to a 3rd driving electrode TX3, wherein each driving electrode may be configured to satisfy the following arrangement conditions.

[0094] Multiple driving electrodes TX are arranged to meet the following conditions. 1) A driving electrode is configured on the left and right sides respectively based on two different receiving electrodes RX0 and RX15 that are continuous in the column direction. 2) Based on two different receiving electrodes RX0 and RX15 that are continuous in the column direction, two opposite driving electrodes TX0 and TX0 have the same number. 3) The driving electrodes TX arranged in the column direction have different numbers, and the driving electrodes TX arranged in the row direction have the same number. 4) The length (lateral length) of the driving electrodes arranged at the two side edges of each group can be half the length (lateral length) of other driving electrodes, but is not limited to this, and the lengths can also be the same.

[0095] Fig.11 (a) and (b) have Fig.10 The touch sensor structure shows raw data output by the touch input device when a specific portion of the touch surface of the touch input device contacts an object such as a thumb.

[0096] Specifically, Fig.11 (a) is the Fig.10 The raw data output by the touch input device of the touch sensor structure shown in the grasping state, Fig.11 (b) has Fig.10The touch input device of the touch sensor structure shown in FIG. 1 outputs raw data in a floating state.

[0097] Fig.11 The original data of (a) and (b) can be derived through the following remapping process. Fig.10 When the driving signals are applied sequentially to the multiple driving electrodes of the touch sensor, predetermined sensing signals are outputted from the multiple receiving electrodes. Figure 1 The sensing unit 11 is converted into a digital value (or signal level value) corresponding to the sensing signal and outputted. Figure 1 The sensing unit 11 maps the output digital value to the positions corresponding to the touch surface of the touch input device. Fig.11 The original data of (a) and (b).

[0098] Fig.11 The numbers recorded in the original data of (a) and (b) can be represented by an integer. When the integer is greater than a preset reference integer value (for example, +65), the touch detection unit of the touch input device can determine (recognize) that the object has touched the part where the number is located.

[0099] See also Fig.11 (a), the data values ​​distributed in the middle part of the original data under the grasping state (normal condition) have relatively larger integer values ​​than other parts. On the contrary, see Fig.11 (b), the digital value recorded in the middle part in the floating state has a value different from Fig.11 Specifically, the middle portion as a whole is similar to Fig.11 Compared with (a), the middle portion has a relatively low integer value, and even a part of the middle portion has a negative (-) value. This is caused by the LGM interference signal occurring in the floating state, and as a result, the touch input device may mistakenly recognize the middle portion as two touches instead of one touch, and may also mistakenly recognize that there is no touch in the middle portion.

[0100] Fig.12 for Figure 1 The touch sensor 10 shown is another example in which a single layer (1 layer) is formed, and is a schematic diagram in which only a portion is enlarged.

[0101] See also Fig.12 The touch sensor includes a plurality of driving electrodes TX and a plurality of receiving electrodes RX. The plurality of driving electrodes TX and the plurality of receiving electrodes RX are arranged in a matrix form on the same layer.

[0102] The plurality of driving electrodes TX and the plurality of receiving electrodes RX may be formed of a transparent conductive material (e.g., indium tin oxide (ITO: Indium Tin Oxide) or antimony tin oxide (ATO: Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is only an example, and the driving electrodes TX and the receiving electrodes RX may also be formed of other transparent conductive materials or non-transparent conductive materials. For example, the driving electrodes TX and the receiving electrodes RX may be formed to contain at least any one of silver ink, copper, nano silver, and carbon nanotubes (CNT: Carbon Nanotube).

[0103] Furthermore, the driving electrode TX and the receiving electrode RX may be implemented by a metal mesh. When the driving electrode TX and the receiving electrode RX are implemented by a metal mesh, the wiring connected to the driving electrode TX and the receiving electrode RX may also be implemented by a metal mesh, and the driving electrode TX and the receiving electrode RX and the wiring may also be implemented as a whole by the metal mesh. When the driving electrode TX and the receiving electrode RX and the wiring are implemented as a whole by the metal mesh, the dead zone where the touch position cannot be sensed, such as between the electrode and the wiring and / or between the electrode and other electrodes, is reduced, thereby further improving the touch position detection sensitivity.

[0104] The touch sensor is arranged based on a plurality of receiving electrodes RX. Therefore, the arrangement structure of the plurality of receiving electrodes RX is first described below, and then the arrangement structure of the plurality of driving electrodes TX is described.

[0105] A plurality of receiving electrodes RX are arranged in each of the plurality of columns A1, A2, A3, A4, A5, A6, A7, and A8. Here, a plurality of driving electrodes TX are arranged in a plurality of columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, and B12 formed between the columns A1, A2, A3, A4, A5, A6, A7, and A8 in which the receiving electrodes RX are arranged, and outside the first column A1 and the eighth column A8.

[0106] With each receiving electrode RX of the plurality of receiving electrodes RX as a reference, two adjacent driving electrodes TX on both sides have the same characteristics. That is, with each receiving electrode RX as a reference, two adjacent driving electrodes TX on both sides have the same number. Here, the two driving electrodes TX being the same or the two driving electrodes TX having the same number means that they are electrically connected to each other through wiring.

[0107] The touch sensor includes one or more sets of a plurality of receiving electrodes RX and a plurality of driving electrodes TX arranged in a predetermined arrangement. The plurality of sets may be repeatedly arranged in the row direction and the column direction.

[0108] A set may include different multiple receiving electrodes Rx. For example, a set may include eight receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7. The eight receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 may be arranged in a predetermined arrangement. The eight receiving electrodes RX0, RX1, RX2, RX3, RX4, RX5, RX6, and RX7 may be arranged separately in four columns A1, A2, A3, and A4 that are continuous in the row direction. Therefore, the four columns may be respectively configured with two receiving electrodes from top to bottom.

[0109] A plurality of receiving electrodes with consecutive numbers are arranged on each column. Here, the arrangement order of the odd columns A1 and A3 may be exactly opposite to the arrangement order of the even columns A2 and A4. For example, in the first column A1, the receiving electrodes RX0 and RX1 with consecutive numbers are arranged in sequence from top to bottom, in the second column A2, the receiving electrodes RX2 and RX3 with consecutive numbers are arranged in sequence from bottom to top, in the third column A3, the receiving electrodes RX4 and RX5 with consecutive numbers are arranged in sequence from top to bottom, and in the fourth column A4, the receiving electrodes RX6 and RX7 with consecutive numbers are arranged in sequence from bottom to top. Although not shown here, the different multiple receiving electrodes contained in one group may also be arranged randomly instead of being arranged in sequence in the row or column direction.

[0110] In addition, the touch sensor includes a plurality of driving electrodes TX, for example, the plurality of driving electrodes TX may include a 0th driving electrode TX0 to a 15th driving electrode TX15. Here, each driving electrode may be configured to satisfy the following arrangement conditions.

[0111] Multiple driving electrodes TX are arranged to meet 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 based on one receiving electrode RX. 2) Two driving electrodes TX opposite to each other based on each receiving electrode RX have the same number. 3) Three driving electrodes with the same number are arranged continuously in the row direction. 3) Three driving electrodes with the same number are arranged continuously in the row direction. 4) The eight driving electrodes adjacent to the receiving electrode RX1 of the even-numbered rows are arranged symmetrically with the eight driving electrodes adjacent to the receiving electrode RX0 of the odd-numbered rows. 5) The length (lateral length) of the driving electrodes arranged at the two side edges of each group and the driving electrode arranged in the center of each group is the length (half the horizontal length) of the other driving electrodes.

[0112] Fig.13 To have Fig.12The structure of the touch sensor shown in the figure shows the raw data when a specific part of the touch surface of the touch input device contacts an object such as a thumb. Specifically, Fig.13 To have Fig.12 The raw data of the touch input device of the touch sensor structure shown is in a floating state.

[0113] See also Fig.13 , it can be seen that the digital value (or level value) output from a specific part in a floating state has a relatively large integer value compared to other parts.

[0114] Compare Fig.13 The original data shown is Fig.11 From the raw data shown in (b), we can see that in the floating state Fig.12 The structure of the touch sensor shown is compared to Fig.10 The structure of the touch sensor shown has a further LGM improvement effect.

[0115] Fig.14 For a rough comparison Fig.10 and Fig.12 A graph of the LGM performance of a touch sensor is shown.

[0116] See also Fig.14 , Fig.10 When the touch sensor is in the gripping state, a relatively large level value among the level values ​​in the touch area is about +250, while when the touch sensor is in the floating state, a relatively large level value is a value between -100 and +100.

[0117] in addition, Fig.12 The illustrated touch sensor has a relatively large level value of about +250 among the level values ​​within the touch area when the touch sensor is in the grip state, and has a relatively large level value of between +70 and +170 when in the floating state.

[0118] according to Fig.14 The coordinate diagram of Fig.10 The touch input device of the touch sensor shown in the figure is difficult to accurately identify whether a touch is made and the touch position in a floating state, and has Fig.12 The touch input device of the touch sensor shown in the floating state still has a relatively large level value of more than +70, so the touch input device has no problem in identifying whether a touch is made and the touch position. However, it is very important for the touch input device to accurately identify whether a touch is made or / and the touch position by outputting a relatively large level value (+250) in the floating state as in the gripping state, or by outputting a level similar to the relatively large level value (+250) in the gripping state.

[0119] The following detailed description can make not only have Fig.12 Touch sensor (1layer) with Figures 9 and 10 Touch sensor (1 layer), and Figures 2 to 3 The touch input device of the double-layer (2-layer) touch sensor outputs a signal level value in a floating state that is the same as or similar to the signal level value output in a gripping state (Floating (final data)) and a touch input device including the same.

[0120] Single-layer or double-layer touch sensors are Figure 4 The method described below can also be applied to any of the cases shown in (a) to (f). That is, the method to be described below can be applied to touch sensors of all currently known structures and touch input devices including the same. In addition, although not shown in another figure, one of the multiple driving electrodes and the multiple receiving electrodes in the double-layer touch sensor can be configured between the touch surface and the display panel, and the other can be configured inside the display panel.

[0121] Furthermore, the embodiments of the present invention are not only applicable to Figure 2 , Figure 3 , Fig. 9 , Fig.10 , Fig.12 The touch input device of the touch sensor shown in the figure can also be applied to a touch input device having a touch sensor of other single-layer or double-layer structure not shown in the figure in this specification. It can also be applied to other specific examples, such as having Fig.15 and Fig.16 A touch input device of the touch sensor shown.

[0122] Fig.15 for Figure 1 The touch sensor 10 shown is another example in which a single layer (1 layer) is formed, and is a schematic diagram in which only a portion is enlarged.

[0123] See also Fig.15 The touch sensor of the embodiment includes a plurality of driving electrodes TX and a plurality of receiving electrodes RX. The plurality of driving electrodes TX and the plurality of receiving electrodes RX are arranged in a matrix form.

[0124] The plurality of driving electrodes TX and the plurality of receiving electrodes RX may be formed of a transparent conductive material (e.g., indium tin oxide (ITO: Indium Tin Oxide) or antimony tin oxide (ATO: Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is only an example, and the driving electrodes TX and the receiving electrodes RX may also be formed of other transparent conductive materials or non-transparent conductive materials. For example, the driving electrodes TX and the receiving electrodes RX may be formed to contain at least any one of silver ink, copper, nano silver, and carbon nanotubes (CNT: Carbon Nanotube).

[0125] Furthermore, the driving electrode TX and the receiving electrode RX may be implemented by a metal mesh. When the driving electrode TX and the receiving electrode RX are implemented by a metal mesh, the wiring connected to the driving electrode TX and the receiving electrode RX may also be implemented by a metal mesh, and the driving electrode TX and the receiving electrode RX and the wiring may also be implemented as a whole by the metal mesh. When the driving electrode TX and the receiving electrode RX and the wiring are implemented as a whole by the metal mesh, the dead zone where the touch position cannot be sensed, such as between the electrode and the wiring and / or between the electrode and other electrodes, is reduced, thereby further improving the touch position detection sensitivity.

[0126] The touch sensor of the embodiment is arranged based on the plurality of driving electrodes TX. Therefore, the arrangement structure of the plurality of driving electrodes TX arranged in columns B1 to B16 is first described below, and then the arrangement structure of the plurality of receiving electrodes RX is described.

[0127] A plurality of driving electrodes TX are arranged in each of the plurality of columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16. A plurality of receiving electrodes RX are arranged in a plurality of columns A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16 formed between the columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16 in which the driving electrodes TX are arranged, and formed outside the first column B1 and outside the sixteenth column B16.

[0128] Based on each driving electrode TX of the plurality of driving electrodes TX, two adjacent receiving electrodes RX have different characteristics. That is, based on each receiving electrode RX, two adjacent driving electrodes TX have different numbers. The two receiving electrodes RX being different or the two receiving electrodes RX having different numbers means that they are not electrically connected to each other through wiring.

[0129] The plurality of driving electrodes TX include a first group (group 1) of 32 electrodes from the 0th driving electrode TX0 to the 31st driving electrode TX31 arranged in a first arrangement, and a second group (group 2) of 32 electrodes from the 0th driving electrode TX0 to the 31st driving electrode TX31 arranged in a second arrangement.

[0130] The first group (group 1) may have two consecutive ones in the row direction and two ones in the column direction. The first group (group 1) located in the even-numbered rows may be symmetrical with the first group (group 1) located in the odd-numbered rows.

[0131] The second group (group 2) may have two consecutive ones in the row direction and two ones in the column direction. The second group (group 2) located in the even rows may be symmetrical with the second group (group 2) located in the odd rows.

[0132] Furthermore, the plurality of second groups may be arranged on one side of the plurality of first groups.

[0133] The first arrangement of the first group (group 1) is to arrange 32 driving electrodes 0 to 31 TX31 separately in four consecutive columns in the row direction. In the first column, driving electrodes numbered 0 to 7 are arranged from top to bottom in the order of TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7. In the second column, driving electrodes numbered 8 to 15 are arranged from top to bottom in the order of TX15, TX14, TX13, TX12, TX11, TX10, TX9, and TX8. In the third column, driving electrodes numbered 16 to 23 are arranged from top to bottom in the order of TX16, TX17, TX18, TX19, TX20, TX21, TX22, and TX23. In the fourth column, driving electrodes numbered 24 to 31 are arranged from top to bottom in the order of TX31, TX30, TX29, TX28, TX27, TX26, TX25, and TX24.

[0134] The second arrangement of the second group (group 2) is to arrange 32 driving electrodes TX0 to TX31 separately in four consecutive columns in the row direction. In the first column, driving electrodes numbered 16 to 23 are arranged from top to bottom in the order of TX16, TX17, TX18, TX19, TX20, TX21, TX22, and TX23. In the second column, driving electrodes numbered 24 to 31 are arranged from top to bottom in the order of TX31, TX30, TX29, TX28, TX27, TX26, TX25, and TX24. In the third column, driving electrodes numbered 0 to 7 are arranged from top to bottom in the order of TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7. In the fourth column, driving electrodes numbered 8 to 15 are arranged from top to bottom in the order of TX15, TX14, TX13, TX12, TX11, TX10, TX9, and TX8.

[0135] In addition, the touch sensor of 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.

[0136] The plurality of receiving electrodes RX are arranged to satisfy the following conditions. 1) One receiving electrode is arranged on the left side and one receiving electrode is arranged on the right side based on eight different driving electrodes TX that are continuous in the column direction. 2) Two receiving electrodes RX that are opposite to each other based on eight different driving electrodes TX that are continuous in the column direction have different numbers. 3) Two different receiving electrodes RX are arranged in the column direction, and eight different receiving electrodes RX are repeatedly arranged in the row direction. 4) The length (lateral length) of the receiving electrodes arranged at the two side edges along the column direction may be the same as the length (lateral length) of other receiving electrodes, but is not limited thereto, and may be half the length (lateral length) of other receiving electrodes.

[0137] Fig.16 for Figure 1 The touch sensor 10 shown is another example in which a single layer (1 layer) is formed, and is a schematic diagram in which only a portion is enlarged.

[0138] See also Fig.16 The touch sensor of the embodiment includes a plurality of driving electrodes TX and a plurality of receiving electrodes RX. The plurality of driving electrodes TX and the plurality of receiving electrodes RX are arranged in a matrix form.

[0139] The plurality of driving electrodes TX and the plurality of receiving electrodes RX may be formed of a transparent conductive material (e.g., indium tin oxide (ITO: Indium Tin Oxide) or antimony tin oxide (ATO: Antimony Tin Oxide) composed of tin oxide (SnO2) and indium oxide (In2O3). However, this is only an example, and the driving electrodes TX and the receiving electrodes RX may also be formed of other transparent conductive materials or non-transparent conductive materials. For example, the driving electrodes TX and the receiving electrodes RX may be formed to contain at least any one of silver ink, copper, nano silver, and carbon nanotubes (CNT: Carbon Nanotube).

[0140] Furthermore, the driving electrode TX and the receiving electrode RX may be implemented by a metal mesh. When the driving electrode TX and the receiving electrode RX are implemented by a metal mesh, the wiring connected to the driving electrode TX and the receiving electrode RX may also be implemented by a metal mesh, and the driving electrode TX and the receiving electrode RX and the wiring may also be implemented as a whole by the metal mesh. When the driving electrode TX and the receiving electrode RX and the wiring are implemented as a whole by the metal mesh, the dead zone where the touch position cannot be sensed, such as between the electrode and the wiring and / or between the electrode and other electrodes, is reduced, thereby further improving the touch position detection sensitivity.

[0141] The touch sensor of the embodiment is arranged based on a plurality of driving electrodes TX. Therefore, the arrangement structure of the plurality of driving electrodes TX arranged in columns B1 to B16 is first described below, and then the arrangement structure of the plurality of receiving electrodes RX is described.

[0142] The plurality of driving electrodes TX may be arranged in a plurality of columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16. The plurality of receiving electrodes RX may be arranged in a plurality of columns A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16 formed between the columns B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, and B16 in which the driving electrodes TX are arranged, and formed outside the first column B1 and outside the sixteenth column B16.

[0143] With each driving electrode TX of the plurality of driving electrodes TX as a reference, two adjacent receiving electrodes RX on both sides have different characteristics. That is, with each driving electrode TX as a reference, two adjacent receiving electrodes RX on both sides have different numbers. The two receiving electrodes RX being different or the two receiving electrodes RX being numbered differently means that they are not electrically connected to each other through wiring.

[0144] The plurality of driving electrodes TX include 32 driving electrodes TX0 to TX31, which are arranged in a first arrangement group (group 1). The groups can be repeatedly arranged in the row direction and the column direction, and the groups (sets) located in the even rows can be symmetrical with the groups located in the odd rows.

[0145] The first arrangement of each set is 32 driving electrodes TX0 to TX31, which are arranged in four consecutive columns in the row direction. In the first column, the driving electrodes numbered 0 to 7 are arranged from top to bottom in the order of TX0, TX1, TX2, TX3, TX4, TX5, TX6, and TX7. In the second column, the driving electrodes numbered 8 to 15 are arranged from top to bottom in the order of TX15, TX14, TX13, TX12, TX11, TX10, TX9, and TX8. In the third column, the driving electrodes numbered 16 to 23 are arranged from top to bottom in the order of TX16, TX17, TX18, TX19, TX20, TX21, TX22, and TX23. In the fourth column, the driving electrodes numbered 24 to 31 are arranged from top to bottom in the order of TX31, TX30, TX29, TX28, TX27, TX26, TX25, and TX24.

[0146] In addition, the touch sensor of 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.

[0147] The plurality of receiving electrodes RX are arranged to satisfy the following conditions. 1) One receiving electrode is arranged on the left and one receiving electrode is arranged on the right based on eight different driving electrodes TX that are continuous in the column direction. 2) Two receiving electrodes RX that are opposite to each other based on eight different driving electrodes TX that are continuous in the column direction have different numbers. 3) Two different receiving electrodes are arranged in the column direction, and 16 different receiving electrodes are repeatedly arranged in the row direction. 4) The lengths (lateral lengths) of the receiving electrodes arranged at the edges on both sides along the column direction are the same, but are not limited to this, and may be half the lengths (lateral lengths) of other receiving electrodes.

[0148] Fig.17 This is an exemplary conceptual diagram conceptualizing a touch sensor according to an embodiment of the present invention.

[0149] See also Fig.17 The touch sensor of the embodiment of the present invention includes a plurality of driving electrodes TX0 to TX7 and a plurality of receiving electrodes RX0 to RX7. Here, the plurality of driving electrodes TX0 to TX7 and the plurality of receiving electrodes RX0 to RX7 may be as follows: Fig.10 or Fig.12 Formed in a single layer, it can also be Figure 2 or Figure 3 Formed in double layers.

[0150] The touch sensor of the embodiment of the present invention including the plurality of driving electrodes TX0 to TX7 and the plurality of receiving electrodes RX0 to RX7 includes nodes forming mutual capacitance Cm and nodes not forming mutual capacitance Cm between the plurality of driving electrodes TX0 to TX7 and the plurality of receiving electrodes RX0 to RX7.

[0151] For example, in Fig.17 The nodes (node) forming 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), (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).

[0152] Each receiving electrode Rx forming a node of the mutual capacitance Cm may be named as an active receiving electrode (ActiveRx).

[0153] The sensing signal output from each receiving electrode Rx of the node forming the mutual capacitance Cm includes not only the information of the capacitance change caused by the touch of the object, but also the noise information. Here, the noise information includes display noise (e.g., Zebra noise) information, information of the change amount that occurs with the change of the image displayed on the display panel, and information of the negative (-) capacitance change amount caused by the LGM interference signal that occurs in the floating state. Therefore, when the sensing signal received from each receiving electrode Rx of the node forming the mutual capacitance Cm is converted into a predetermined level value and output, the output level value reflects the information of the mutual capacitance change amount and the noise information.

[0154] in addition, Fig.17 The nodes (node) 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), (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).

[0155] Each receiving electrode Rx that does not form a node of mutual capacitance Cm may be named a dummy receiving electrode (Dummy Rx). The dummy receiving electrode may be a structure independently provided from the plurality of receiving electrodes in the touch sensor, and some of the plurality of receiving electrodes may also be used as dummy receiving electrodes under certain circumstances and conditions.

[0156] The sensing signal outputted from each receiving electrode Rx of a node that does not form the mutual capacitance Cm does not include information on the capacitance change amount caused by the touch of the object, but only includes noise information.

[0157] Therefore, the touch input device of the embodiment of the present invention having such a touch sensor can remove the noise information by subtracting the sensing signal (first sensing signal) output from each receiving electrode Rx of the node that does not form the mutual capacitance Cm from the sensing signal (second sensing signal) output from each receiving electrode Rx of the node that does not form the mutual capacitance Cm. Therefore, the digital value (or signal level value) corresponding to the final sensing signal obtained by the touch input device by subtracting the sensing signal output from each receiving electrode Rx of the node that does not form the mutual capacitance Cm from the sensing signal output from each receiving electrode Rx of the node that forms the mutual capacitance Cm is a value based on the information about the capacitance change amount caused by the touch of the object. Even if the touch input device is in a floating state, it is possible to output a digital value that is the same as or almost similar to the digital value output in the grip state.

[0158] Here, it is more preferred that the touch input device of the embodiment of the present invention can also subtract the product of the sensing signal (second sensing signal) output from each receiving electrode Rx of the node (node) that does not form the mutual capacitance Cm and the preset factor (factor) from the sensing signal (first sensing signal) output from each receiving electrode Rx of the node (node) that forms the mutual capacitance Cm. The reason for multiplying the second sensing signal by the factor is to compensate for the size change of the sensing signal that may be generated due to the difference in the composition of the active channel (active channel) and the dummy channel (dummy channel). For example, the factor can have a preset value such as 0.8, but is not limited to this, and the value of the factor may vary according to the design.

[0159] See below Figures 18 to 24 Describe specific examples.

[0160] Fig.18 For the general Fig.12 A conceptual diagram showing a touch sensor conceptually according to an embodiment of the present invention.

[0161] See also Fig.18 The touch sensor of the 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 (Dummy Rx). Here, which of the plurality of receiving electrodes RX0 to RX7 is used as a dummy receiving electrode depends on the driving electrode to which the driving signal is applied.

[0162] For example, when a driving signal is applied to the 0th driving 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 virtual receiving electrodes. In other words, when a driving signal is applied to the 0th driving 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 driving 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 driving electrode Tx0.

[0163] If 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 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 receiving electrodes that do not form mutual capacitance Cm with the first driving electrode Tx1.

[0164] The touch input device of the embodiment of the present invention having such a touch sensor can remove noise information, especially information of the negative (-) capacitance change caused by the LGM interference signal, by subtracting the sensing signal output from each receiving electrode Rx of the node that does not form the mutual capacitance Cm from the sensing signal output from each receiving electrode Rx of the node that forms the mutual capacitance Cm. Here, the touch input device of the embodiment of the present invention having the touch sensor can also subtract the product of the sensing signal output from each receiving electrode Rx of the node that does not form the mutual capacitance Cm and a preset factor from the sensing signal output from each receiving electrode Rx of the node that forms the mutual capacitance Cm.

[0165] Fig.19 For illustration Fig.12 An illustration of an electrode used as a virtual receiving electrode among a plurality of receiving electrodes of a touch sensor is shown.

[0166] See also Fig.19 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 virtual receiving electrodes (Du mmyRx) that do not form mutual capacitance Cm with the first driving electrode Tx1.

[0167] The sensing signal output from the activated Rx (Rx4, Rx5, Rx6, Rx7) includes not only information about the capacitance change caused by the touch of the object, but also noise information. Here, the noise information includes display noise (e.g., Zebra noise) information, information about the change that occurs with the image displayed on the display panel, and information about the negative (-) capacitance change caused by the LGM interference signal that occurs in the floating state. Therefore, when the sensing signal output from the activated Rx (Rx4, Rx5, Rx6, Rx7) is converted into a predetermined level value output by the touch detection unit of the touch input device, the output level value reflects the information about the mutual capacitance change and the noise information.

[0168] On the other hand, the sensing signals output from the virtual Rx (Rx0, Rx1, Rx2, Rx3) have almost no information on the capacitance variation caused by the touch of the object, and only include the noise information.

[0169] Fig. 20 For from having Fig.12 An illustrative diagram showing raw data output by a touch input device of a touch sensor according to an embodiment of the present invention.

[0170] Fig. 20 The original data shown in (a) is Fig.13 The original data is the same as shown. That is, Fig.13 The raw data shown are based on Fig.12 The raw data of the sensing signal output by each receiving electrode (Active, Rx) of the node forming the mutual capacitance Cm in the touch sensor shown in FIG. Fig. 20 (b) is based on Fig.12 The touch sensor shown is raw data of sensing signals output by each receiving electrode (Dummy Rx) of a node that does not form a mutual capacitance Cm.

[0171] Fig. 20 (c) is raw data when a sensing signal output from each receiving electrode (Dummy Rx) of a node (node) not forming the mutual capacitance Cm is subtracted from a sensing signal output from each receiving electrode (Active Rx) of a node (node) forming the mutual capacitance Cm.

[0172] Compare Fig. 20 (c) The original data and Fig. 20 From (a), we can see that Fig. 20 The digital value (or level value) in the touch area where the actual object touches in the original data of (c) is greater than Fig. 20The digital value (or level value) of the corresponding part of (a) is relatively higher. That is, it can be confirmed that the central part of the touch area has a level value of about +250 or more, so that it can be confirmed that the touch input device can also obtain the same or similar level value as that in the gripping state when it is in the floating state.

[0173] Although additional raw data is not shown, it is expected that the raw data obtained by subtracting the product of the sensing signal output from each receiving electrode (Active Rx) of the node (node) that does not form the mutual capacitance Cm and the sensing signal output from each receiving electrode (DummyRx) of the node (node) that does not form the mutual capacitance Cm and the preset factor is also the same as Fig. 20 (c) is similar.

[0174] Fig.21 This is a conceptual diagram conceptualizing a touch sensor according to an embodiment of the present invention having a bridge structure.

[0175] See also Fig.21 The touch sensor according to the 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 the embodiment of the present invention includes a plurality of dummy receiving electrodes DRx0 to DRx3 .

[0176] Mutual capacitance Cm is formed between the plurality of driving electrodes TX0 to TX7 and the plurality of receiving electrodes RX0 to RX3, but no mutual capacitance Cm is formed between the plurality of driving electrodes TX0 to TX7 and the plurality of virtual receiving electrodes DRx0 to DRx3. Here, in fact, weak mutual capacitance can be formed between the plurality of driving electrodes TX0 to TX7 and the plurality of virtual receiving electrodes DRx0 to DRx3, but the weak mutual capacitance can be ignored when detecting whether a touch is present.

[0177] The touch input device of the embodiment of the present invention having such a touch sensor can remove noise information, especially information on the amount of negative (-) capacitance change caused by the LGM interference signal, by subtracting the sensing signal output from each receiving electrode Rx at a node that does not form the mutual capacitance Cm from the sensing signal output from each receiving electrode Rx at a node that forms the mutual capacitance Cm. Here, the touch input device of the embodiment of the present invention having the touch sensor can also subtract the product of the sensing signal output from each receiving electrode Rx at a node that does not form the mutual capacitance Cm and a preset factor from the sensing signal output from each receiving electrode Rx at a node that forms the mutual capacitance Cm.

[0178] Fig. 22 To be applicable Fig.21 A diagram showing a configuration of a touch sensor which is an example of a conceptual diagram of a touch sensor shown.

[0179] See also Fig. 22 , multiple driving electrodes Tx0, Tx1, Tx2, and Tx3 are arranged in parallel in the longitudinal direction, and multiple receiving electrodes Rx0 and Rx1 are arranged in parallel in the vertical direction.

[0180] The plurality of driving electrodes Tx0 , Tx1 , Tx2 , and Tx3 and the plurality of receiving electrodes Rx0 , and Rx1 are respectively in a rhombus shape, and two adjacent driving electrodes and two adjacent receiving electrodes are connected to each other through a conductive connection component.

[0181] The plurality of driving electrodes Tx0, Tx1, Tx2, Tx3 and the plurality of receiving electrodes Rx0, Rx1 may be implemented by a metal mesh. Here, the conductive connection portion connecting the plurality of driving electrodes Tx0, Tx1, Tx2, Tx3 may also be implemented by a metal mesh. The conductive connection portion connecting the plurality of driving electrodes Tx0, Tx1, Tx2, Tx3 may be implemented by a metal mesh or by a conductive line.

[0182] The plurality of driving electrodes Tx0, Tx1, Tx2, Tx3 and the plurality of receiving electrodes Rx0, Rx1 have electrically insulated dummy patterns inside them. The dummy patterns may be formed to reduce the base capacitance of each receiving electrode and the driving electrode. After the patterns of each driving electrode and the pattern of the receiving electrode are formed by using a metal mesh, a portion of the metal mesh inside each pattern may be disconnected to form a dummy pattern.

[0183] The multiple virtual receiving electrodes DRx0 and DRx1 can be obtained by electrically connecting the virtual patterns inside the multiple receiving electrodes Rx0 and Rx1. The multiple receiving electrodes Rx0 and Rx1 are very close to the multiple driving electrodes Tx0, Tx1, Tx2, and Tx3, so a mutual capacitance Cm is formed, but the multiple virtual receiving electrodes DRx0 and DRx1 are relatively far away from the multiple driving electrodes Tx0, Tx1, Tx2, and Tx3, so a mutual capacitance Cm that is small enough to be ignored is formed.

[0184] Fig.23 This is another conceptual diagram conceptualizing a touch sensor according to an embodiment of the present invention having a bridge structure.

[0185] See also Fig.23 The touch sensor according to the embodiment of the present invention includes a plurality of driving electrodes TX0 to TX3 and a plurality of receiving electrodes RX0 to RX7 . Also, the touch sensor according to the embodiment of the present invention includes a plurality of dummy driving electrodes DTx0 to DTx3 .

[0186] Mutual capacitance Cm is formed between the plurality of driving electrodes TX0 to TX3 and the plurality of receiving electrodes RX0 to RX7, but mutual capacitance Cm is not formed between the plurality of virtual driving electrodes DTX0 to DTX3 and the plurality of receiving electrodes Rx0 to Rx7. Here, in fact, weak mutual capacitance may be formed between the plurality of virtual driving electrodes DTX0 to DTX3 and the plurality of receiving electrodes Rx0 to Rx7, but the weak mutual capacitance may be ignored when detecting whether a touch is present.

[0187] The touch input device of the embodiment of the present invention having such a touch sensor can remove noise information, especially information on the amount of negative (-) capacitance change caused by the LGM interference signal, by subtracting the sensing signal output from each receiving electrode Rx at the node that does not form the mutual capacitance Cm from the sensing signal output from each receiving electrode Rx at the node that forms the mutual capacitance Cm. Here, the product of the sensing signal output from each receiving electrode Rx at the node that does not form the mutual capacitance Cm and a preset factor can also be subtracted from the sensing signal output from each receiving electrode Rx at the node that forms the mutual capacitance Cm.

[0188] Fig.24 To be applicable Fig.23 A diagram showing a configuration of a touch sensor which is an example of a conceptual diagram of a touch sensor shown.

[0189] See also Fig.24 , multiple receiving electrodes Rx0, Rx1, Rx2, and Rx3 are arranged in parallel in the horizontal direction, and multiple driving electrodes Tx0 and Tx1 are arranged in parallel in the vertical direction.

[0190] The plurality of receiving electrodes Rx0 , Rx1 , Rx2 , and Rx3 and the plurality of driving electrodes Tx0 , and Tx1 are respectively in a rhombus shape, and two adjacent driving electrodes and two adjacent receiving electrodes are electrically connected via a conductive connection portion.

[0191] The multiple receiving electrodes Rx0, Rx1, Rx2, Rx3 and the multiple driving electrodes Tx0, Tx1 can be implemented by a metal mesh. Here, the conductive connection portion connecting the multiple receiving electrodes Rx0, Rx1, Rx2, Rx3 can also be implemented by a metal mesh. The conductive connection portion connecting the multiple receiving electrodes Rx0, Rx1, Rx2, Rx3 can also be implemented by a metal mesh or a conductive line.

[0192] The plurality of receiving electrodes Rx0, Rx1, Rx2, Rx3 and the plurality of driving electrodes Tx0, Tx1 have electrically insulated dummy patterns inside them. The dummy patterns may be formed to reduce the base capacitance of each receiving electrode and driving electrode. After the pattern of each driving electrode and the pattern of the receiving electrode are formed by using a metal mesh, a part of the metal mesh inside each pattern may be disconnected to form a dummy pattern.

[0193] The multiple virtual driving electrodes DTx0 and DTx1 can be obtained by electrically connecting the virtual patterns inside the multiple driving electrodes Tx0 and Tx1. The multiple driving electrodes Tx0 and Tx1 are very close to the multiple receiving electrodes Rx0, Rx1, Rx2, and Rx3, so a mutual capacitance Cm is formed, but the multiple virtual driving electrodes DTx0 and DTx1 are relatively far away from the multiple driving electrodes Tx0, Tx1, Tx2, and Tx3, so the mutual capacitance Cm formed is small enough to be ignored.

[0194] Fig.25 To be applicable Fig.21 The conceptual diagram of the touch sensor shown is a diagram showing a configuration of a touch sensor of another example.

[0195] See also Fig.25 , a plurality of receiving electrodes Rx0, Rx1, and Rx2 are arranged in parallel in the horizontal direction, and a plurality of driving electrodes Tx0, Tx1, and Tx2 are arranged in parallel in the vertical direction. Here, the horizontal direction and the vertical direction may be interchanged.

[0196] The plurality of receiving electrodes Rx0 , Rx1 , and Rx2 and the plurality of driving electrodes Tx0 , Tx1 , and Tx2 are in a bar shape respectively.

[0197] A plurality of receiving electrodes Rx0, Rx1, and Rx2 are formed on the first layer, and a plurality of driving electrodes Tx0, Tx1, and Tx2 are formed on the second layer. The first layer and the second layer are not arranged on the same plane. For example, the first layer may be arranged on the second layer. An insulating layer may be arranged between the first layer and the second layer.

[0198] The plurality of receiving electrodes Rx0 , Rx1 , Rx2 and the plurality of driving electrodes Tx0 , Tx1 , Tx2 may be implemented by a metal mesh or a conductive metal.

[0199] Fig.25 The touch sensor shown includes a plurality of virtual receiving electrodes DRx0, DRx1, DRx2. The plurality of virtual receiving electrodes DRx0, DRx1, DRx2 are formed together on a layer formed with a plurality of receiving electrodes Rx0, Rx1, Rx2, and a virtual receiving electrode DRx0, DRx1, DRx2 can be configured between each column of the plurality of receiving electrodes Rx0, Rx1, Rx2.

[0200] Each driving electrode Tx0, Tx1, Tx2 includes a first region overlapping with each receiving electrode Rx0, Rx1, Rx2 and a second region overlapping with each virtual receiving electrode DRx0, DRx1, DRx2. Here, the area of ​​the first region is formed to be larger than the area of ​​the second region. In particular, it is preferred that the area of ​​the second region is formed to be as small as possible. This is to minimize the mutual capacitance between the virtual receiving electrode and the driving electrode. Alternatively, it can also be designed that under the condition that the receiving electrode and the virtual receiving electrode have the same shape, the width of the first region overlapping with the receiving electrode in each driving electrode is greater than the width of the second region overlapping with the virtual receiving electrode.

[0201] There are relatively many overlapping areas of the multiple driving electrodes Tx0, Tx1, Tx2 with the multiple receiving electrodes Rx0, Rx1, Rx2, thus forming a relatively large mutual capacitance Cm, but the multiple virtual receiving electrodes DRx0, DRx1, DRx2 overlap with the multiple driving electrodes Tx0, Tx1, Tx2 relatively little, thus the mutual capacitance Cm formed between the two is small enough to be negligible.

[0202] Fig.26 To be applicable Fig.23 The conceptual diagram of the touch sensor shown is a diagram showing a configuration of a touch sensor of another example.

[0203] See also Fig.26 , a plurality of receiving electrodes Rx0, Rx1, Rx2 are arranged in parallel vertically, and a plurality of driving electrodes Tx0, Tx1, Tx2 are arranged in parallel horizontally. Here, the horizontal and vertical directions may be interchanged.

[0204] The plurality of receiving electrodes Rx0 , Rx1 , and Rx2 and the plurality of driving electrodes Tx0 , Tx1 , and Tx2 are in a bar shape respectively.

[0205] A plurality of receiving electrodes Rx0, Rx1, and Rx2 are formed on the first layer, and a plurality of driving electrodes Tx0, Tx1, and Tx2 are formed on the second layer. The first layer and the second layer are not arranged on the same layer. For example, the first layer may be arranged on the second layer. An insulating layer may be arranged between the first layer and the second layer.

[0206] The plurality of receiving electrodes Rx0 , Rx1 , Rx2 and the plurality of driving electrodes Tx0 , Tx1 , Tx2 may be implemented by a metal mesh or a conductive metal.

[0207] Fig.26 The touch sensor shown includes a plurality of virtual driving electrodes DTx0, DTx1, DTx2. The plurality of virtual driving electrodes DTx0, DTx1, DTx2 are formed together on a layer formed with a plurality of driving electrodes Tx0, Tx1, Tx2, and a virtual driving electrode DTx0, DTx1, DTx2 can be configured between each column of the plurality of driving electrodes Tx0, Tx1, Tx2.

[0208] Each receiving electrode Rx0, Rx1, Rx2 includes a first region overlapping with each driving electrode Tx0, Tx1, Tx2 and a second region overlapping with each virtual driving electrode DTx0, DTx1, DTx2. Here, the area of ​​the first region is formed to be larger than the area of ​​the second region. In particular, it is preferred that the area of ​​the second region is formed as small as possible. This is to minimize the mutual capacitance between the virtual driving electrode and the receiving electrode. Alternatively, it can also be designed that under the condition that the shape of the receiving electrode is the same, the width of the first region overlapping with the driving electrode and the receiving electrode is larger than the width of the second region overlapping with the virtual driving electrode and the receiving electrode.

[0209] The overlapping areas of each driving electrode Tx0, Tx1, Tx2 with each receiving electrode Rx0, Rx1, Rx2 are relatively large, thus forming a relatively large mutual capacitance Cm, but the overlapping amounts of each virtual driving electrode DTx0, DTx1, DTx2 with each receiving electrode Rx0, Rx1, Rx2 are relatively small, thus forming a mutual capacitance Cm between the two that is small enough to be ignored.

[0210] The applicant used a conductive rod with a diameter of 15φ in a Fig.10 The touch input device of the touch sensor shown is tested in a gripping state and a floating state, respectively, and raw data in each state is obtained. Fig. 27 The raw data obtained are shown as follows. Fig. 27 The original data on the left side is the grasping state. Fig. 27 The original data on the right side of is in floating state. Fig. 27 It can be seen from the left and right raw data that the LGM interference signal generated in the floating state causes the level value of the touch area to drop significantly.

[0211] Furthermore, the present applicant used a conductive rod with a diameter of 15φ in a Fig.12 The touch input device of the touch sensor shown in the figure was tested in a gripping state and a floating state. Fig. 20 According to the descriptions of (a) to (c), the raw data in each state can be obtained by subtracting the sensing signal output from the receiving electrode that forms 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. Fig.28 The raw data obtained are shown as follows. Fig.28 The original data on the left side is the grasping state. Fig.28 The original data on the right side of is in floating state. Fig.28 From the raw data of the left and right sides, we can see that the deviation of the level value in the touch area in the grip state and the floating state is Fig. 27 Significantly lower.

[0212] Furthermore, the present applicant used a conductive rod with a diameter of 20φ in a Fig.10 The touch input device of the touch sensor shown is tested in a gripping state and a floating state, respectively, and raw data in each state is obtained. Fig.29 The raw data obtained are shown as follows. Fig.29 The original data on the left side is the grasping state. Fig.29 The original data on the right side of is in floating state. Fig.29 It can be seen from the left and right raw data that the LGM interference signal generated in the floating state causes the level value of the touch area to be significantly reduced.

[0213] Furthermore, the present applicant used a conductive rod with a diameter of 15φ in a Fig.12 The touch input device of the touch sensor shown in the figure was tested in a gripping state and a floating state. Fig. 20 According to the descriptions of (a) to (c), the raw data in each state can be obtained by subtracting the sensing signal output from the receiving electrode that forms 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. Fig.30 The raw data obtained are shown as follows. Fig.30 The original data on the left side is the grasping state. Fig.30 The original data on the right side of is in floating state. Fig.30 It can be seen from the left and right raw data that the deviation of the level values ​​in the touch area in the grip state and the floating state is small, and there is even a part with a larger level value in the floating state.

[0214] Furthermore, the applicant used a real person's thumb to Fig.10 The touch input device of the touch sensor shown is tested in a gripping state and a floating state, respectively, and raw data in each state is obtained. Fig.31 The raw data obtained are shown as follows. Fig.31 The original data on the left side is the grasping state. Fig.31 The original data on the right side of is in floating state. Fig.31 It can be seen from the left and right raw data that the LGM interference signal generated in the floating state causes the level value of the touch area to be significantly reduced.

[0215] Furthermore, the present applicant used a conductive rod with a diameter of 15φ in a Fig.12 The touch input device of the touch sensor shown in the figure was tested in a gripping state and a floating state. Fig. 20 According to the descriptions of (a) to (c), the raw data in each state can be obtained by subtracting the sensing signal output from the receiving electrode that forms 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. Fig.32 The raw data obtained are shown as follows. Fig.32 The original data on the left side is the grasping state. Fig.32The original data on the right side of is in floating state. Fig.32 From the raw data on the left and right, we can see that there is almost no deviation in the level value in the touch area between the grip state and the floating state.

[0216] A touch input device including the touch sensor according to the embodiment of the present invention has a unique advantage of being able to distinguish two or more multi-touches even in a floating state.

[0217] Fig.33 This is a schematic diagram showing that when a conventional touch input device is in a floating state, multiple touches caused by multiple objects cannot be recognized.

[0218] Fig.33 The situation is exemplary, and it can be assumed that a user touches the touch surface of the touch input device with two fingers in a state where the existing touch input device is mounted on a bracket in a car.

[0219] Existing touch input devices such as Fig.33 As shown in the left figure of FIG. , one of the two multi-touch touches is not recognized, or as Fig.33 In the right-hand figure, although the user performs two touches, the touch input device recognizes this as three or four multi-touches.

[0220] Fig.34 (a) is to make it have Figure 3 The raw data of the touch input device of the double-layer touch sensor when multiple touches are performed after the touch input device is in a floating state. Fig.34 (a), the LGM interference signal generated in the floating state causes the level value of the multi-touch area to be relatively low. If the reference level value for determining whether a touch is made is set to 65, the relatively upper touch portion is not recognized as a touch, and the relatively lower touch portion is recognized as a touch, so that one of the two touches is not recognized.

[0221] Fig.34 (b) is to have Fig.10 The raw data of the touch input device of the touch sensor shown when multiple touches are performed after the touch input device is in a floating state. Fig.34 (b) shows that the LGM interference signal generated in the floating state causes the level value of the multi-touch area to be relatively low. If the reference level value for determining whether a touch is present is set to 65, it is recognized that there are more than three touches.

[0222] Fig.34 (c) is in the Fig.12 The touch input device of the touch sensor shown is suitable for Fig. 20In the method described in (a) to (c) of subtracting the sensing signal output by the receiving electrode that does not form a mutual capacitance with the driving electrode from the sensing signal output by the receiving electrode that forms a mutual capacitance with the driving electrode, raw data when the touch input device is placed in a floating state and a multi-touch is performed. Fig.34 In (c), the two multi-touched parts output relatively large positive (+) level values, so the touch input device can accurately recognize the user's multi-touch as multi-touch.

[0223] Furthermore, the touch input device having the touch sensor according to the embodiment of the present invention described above has a function that can recognize a third touch (3 rd Touch)'s unique advantages.

[0224] Fig.35 This is a schematic diagram showing that when a cross touch and a third touch are simultaneously performed on the touch surface of a conventional touch input device, the third touch cannot be recognized.

[0225] Existing touch input devices such as Fig.35 In the left and right figures, the third touch among the two cross touches performed by two fingers of the left hand and the third touch performed by one finger of the right hand is not recognized.

[0226] Fig.36 (a) is for Figure 3 The raw data of the touch input device of the dual-layer touch sensor when a cross touch and a third touch are performed. Fig.36 (a), the level value at the circle area corresponding to the third touch is relatively lower than that at the cross-touch portion. Therefore, the touch input device cannot recognize the third touch.

[0227] Fig.36 (b) is for Fig.10 The touch sensor shown in the figure shows the raw data when the touch input device performs a cross touch and a third touch. Fig.36 In (b), the level value at the circle area corresponding to the third touch is relatively lower than that at the cross-touch portion. Therefore, the touch input device cannot recognize the third touch.

[0228] Fig.36 (c) is in the Fig.12 The touch input device of the touch sensor shown is suitable for Fig. 20 In 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, raw data when the touch input device is subjected to a cross touch and a third touch. Fig.36As shown in (c), the two cross-touched parts output relatively large positive (+) level values, and the circle area corresponding to the third touch also outputs relatively large positive (+) level values. That is, the touch input device can recognize the third touch while recognizing the cross touch.

[0229] The features, structures, effects, etc. described in the above embodiments are included in one embodiment of the present invention, but are not limited to one embodiment. Furthermore, a person skilled in the art of the various embodiments may combine or modify the features, structures, effects, etc. illustrated in the various embodiments in other embodiments for implementation. Therefore, the contents of these combinations and modifications should be interpreted as being included in the scope of the present invention.

[0230] Furthermore, although the above description is centered on the implementation mode, these are merely examples and do not limit the present invention. A person skilled in the art of the present invention may also perform various modifications and applications not illustrated above within the scope of the essential features of the present implementation mode. For example, each component specifically appearing in the implementation mode may be implemented in a deformable manner. Furthermore, the differences in these modifications and applications should be interpreted as being included in the scope of the present invention as defined in the appended claims.

Claims

1. A touch input device having a touch surface, wherein: include: A display panel, arranged below the touch surface; A touch sensor, disposed below the touch surface, comprising a plurality of driving electrodes, a plurality of receiving electrodes and a plurality of virtual receiving electrodes; as well as a touch detection unit that detects a touch position of an object input to the touch surface based on sensing signals output from the plurality of receiving electrodes of the touch sensor, The touch detection unit detects a touch position of the object input to the touch surface by subtracting a second sensing signal output from a virtual receiving electrode that is not adjacent to the predetermined driving electrode and is arranged at a predetermined distance from the plurality of virtual receiving electrodes from a first sensing signal output from a predetermined receiving electrode that is adjacent to the predetermined driving electrode among the plurality of receiving electrodes, The first sensing signal includes information about a change in mutual capacitance between the predetermined driving electrode and the predetermined receiving electrode and noise information. The second sensing signal includes the noise information, The noise information includes display noise information of the display panel, noise information generated due to the change of the image displayed on the display panel, and information on the amount of negative (-) capacitance change caused by the LGM interference signal generated by coupling between the object and the predetermined driving electrode.

2. The touch input device according to claim 1, wherein: The touch sensor includes a first layer configured with the plurality of driving electrodes and a second layer configured with the plurality of receiving electrodes. The plurality of virtual receiving electrodes are arranged on the second layer and are arranged to be electrically insulated from the plurality of receiving electrodes. The driving electrode includes a first area overlapping with the receiving electrode and a second area overlapping with the virtual receiving electrode, The first area is larger than the second area.

3. The touch input device according to claim 1, wherein: The touch detection unit subtracts a product of the second sensing signal and a preset factor from the first sensing signal to detect a touch position of the object input to the touch surface.

4. A touch input device having a touch surface, wherein: include: A display panel, arranged below the touch surface; A touch sensor, disposed below the touch surface, comprising a plurality of driving electrodes, a plurality of receiving electrodes and a plurality of virtual driving electrodes; as well as a touch detection unit that detects a touch position of an object input to the touch surface based on sensing signals output from the plurality of receiving electrodes of the touch sensor, The touch detection unit detects a touch position of the object input to the touch surface by subtracting a second sensing signal output from a predetermined receiving electrode that is not adjacent to the predetermined virtual driving electrode and is arranged at a predetermined distance from the predetermined receiving electrode among the plurality of receiving electrodes from a first sensing signal output from the predetermined receiving electrode that is adjacent to the predetermined driving electrode among the plurality of receiving electrodes. The first sensing signal includes information about a change in mutual capacitance between the predetermined driving electrode and the predetermined receiving electrode and noise information, The second sensing signal includes the noise information, The noise information includes display noise information of the display panel, noise information generated due to the change of the image displayed on the display panel, and information on the amount of negative (-) capacitance change caused by the LGM interference signal generated by coupling between the object and the predetermined driving electrode.

5. The touch input device according to claim 4, wherein: The touch sensor includes a first layer configured with the plurality of driving electrodes and a second layer configured with the plurality of receiving electrodes. The plurality of virtual driving electrodes are arranged on the first layer and are arranged to be electrically insulated from the plurality of driving electrodes. The receiving electrode includes a first area overlapping with the driving electrode and a second area overlapping with the virtual driving electrode, The first area is larger than the second area.

6. The touch input device according to claim 4, wherein: The touch detection unit subtracts a product of the second sensing signal and a preset factor from the first sensing signal to detect a touch position of the object input to the touch surface.

7. A touch input device having a touch surface, wherein: include: A display panel, arranged below the touch surface; A touch sensor, comprising a plurality of driving electrodes and a plurality of receiving electrodes arranged below the touch surface; as well as a touch detection unit that detects a touch position of an object input to the touch surface based on sensing signals output from the plurality of receiving electrodes of the touch sensor; The touch detection unit detects a touch position of the object input to the touch surface by subtracting a second sensing signal output from another predetermined receiving electrode among the plurality of receiving electrodes that is not adjacent to the predetermined driving electrode and is arranged at a predetermined distance from the first sensing signal output from the predetermined receiving electrode adjacent to the predetermined driving electrode among the plurality of receiving electrodes, The first sensing signal includes information about a change in mutual capacitance between the predetermined driving electrode and the predetermined receiving electrode and noise information, The second sensing signal includes the noise information, The noise information includes display noise information of the display panel, noise information generated due to the change of the image displayed on the display panel, and information on the amount of negative (-) capacitance change caused by the LGM interference signal generated by coupling between the object and the predetermined driving electrode.

8. The touch input device according to claim 7, wherein: The plurality of driving electrodes and the plurality of receiving electrodes are arranged on the same layer and are electrically insulated from each other. At least one driving electrode which is not electrically connected to the predetermined driving electrode is arranged between the predetermined driving electrode and the another predetermined receiving electrode.

9. The touch input device according to claim 7, wherein: The touch detection unit subtracts a product of the second sensing signal and a preset factor from the first sensing signal to detect a touch position of the object input to the touch surface.

10. The touch input device according to claim 7, wherein: Also includes: A driving unit, applying a driving signal to the plurality of driving electrodes; When the driving unit applies the driving signal to the predetermined driving electrode and other driving electrodes, the predetermined receiving electrode and the other driving electrodes are not adjacent to each other and are arranged at a predetermined distance, and the other predetermined receiving electrodes are adjacent to the other driving electrodes.

11. A touch sensor, wherein: include: A plurality of driving electrodes; a plurality of receiving electrodes, electrically insulated from the plurality of driving electrodes and adjacent to the plurality of driving electrodes; as well as A plurality of virtual receiving electrodes are electrically insulated from the plurality of driving electrodes and the plurality of receiving electrodes, are not adjacent to the plurality of driving electrodes and are arranged at a predetermined distance from each other, When a driving signal is applied through a predetermined driving electrode among the plurality of driving electrodes, a first sensing signal output from a predetermined receiving electrode among the plurality of receiving electrodes includes information on a change in mutual capacitance between the predetermined driving electrode and the predetermined receiving electrode and noise information, a second sensing signal outputted from a predetermined virtual receiving electrode among the plurality of virtual receiving electrodes including the noise information, The noise information includes display noise information of the display panel, noise information generated due to the change of the image displayed on the display panel, and information on the amount of negative (-) capacitance change caused by the LGM interference signal generated by coupling between the object and the predetermined driving electrode.

12. The touch sensor according to claim 11, wherein: include: a first layer configured with the plurality of driving electrodes and a second layer configured with the plurality of receiving electrodes, The plurality of virtual receiving electrodes are arranged on the second layer, The driving electrode includes a first area overlapping with the receiving electrode and a second area overlapping with the virtual receiving electrode, The first area is larger than the second area.

13. A touch sensor, wherein: include: A plurality of driving electrodes; a plurality of virtual driving electrodes, electrically insulated from the plurality of driving electrodes; as well as a plurality of receiving electrodes, which are electrically insulated from the plurality of driving electrodes and the plurality of virtual driving electrodes and are adjacent to the plurality of driving electrodes, and are not adjacent to the plurality of virtual driving electrodes and are arranged at a predetermined distance from each other; A predetermined receiving electrode among the plurality of receiving electrodes outputs a first sensing signal and a second sensing signal, The first sensing signal includes information on a change in mutual capacitance between the predetermined receiving electrode and a predetermined driving electrode among the plurality of driving electrodes and noise information. The second sensing signal includes the noise information, The noise information includes display noise information of the display panel, noise information generated due to the change of the image displayed on the display panel, and information on the amount of negative (-) capacitance change caused by the LGM interference signal generated by coupling between the object and the predetermined driving electrode.

14. The touch sensor according to claim 13, wherein: include: a first layer configured with the plurality of driving electrodes and a second layer configured with the plurality of receiving electrodes, The plurality of virtual driving electrodes are arranged on the first layer, The receiving electrode includes a first area overlapping with the driving electrode and a second area overlapping with the virtual driving electrode, The first area is larger than the second area.

15. A touch sensor, wherein: include: A plurality of driving electrodes; as well as a plurality of receiving electrodes, electrically insulated from the plurality of driving electrodes, When a driving signal is applied through a predetermined driving electrode among the plurality of driving electrodes, a first sensing signal output from a first receiving electrode adjacent to the predetermined driving electrode among the plurality of receiving electrodes includes information on a change in mutual capacitance between the predetermined driving electrode and the first receiving electrode and noise information, The second sensing signal outputted from the second receiving electrode which is not adjacent to the predetermined driving electrode and is arranged at a predetermined distance from the plurality of receiving electrodes includes the noise information, The noise information includes display noise information of the display panel, noise information generated due to the change of the image displayed on the display panel, and information on the amount of negative (-) capacitance change caused by the LGM interference signal generated by coupling between the object and the predetermined driving electrode.

16. The touch sensor according to claim 15, wherein: The plurality of driving electrodes and the plurality of receiving electrodes are arranged in the same layer and are electrically insulated from each other. At least one driving electrode which is not electrically connected to the predetermined driving electrode is arranged between the predetermined driving electrode and the second receiving electrode.

17. The touch sensor according to claim 15, wherein: When the driving signal is applied to other driving electrodes different from the predetermined driving electrode, the first sensing signal is output from the second receiving electrode, and the second sensing signal is output from the first receiving electrode.

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