WO2015122714A1

WO2015122714A1 - Method for removing noise introduced from non-sensing region in touch input sensing device

Info

Publication number: WO2015122714A1
Application number: PCT/KR2015/001470
Authority: WO
Inventors: 신형철; 윤일현
Original assignee: 주식회사 센트론
Priority date: 2014-02-17
Filing date: 2015-02-13
Publication date: 2015-08-20
Also published as: KR20150097407A; KR20160144947A; KR101813980B1

Abstract

A touch input sensing device is disclosed, the device comprising: a sensing part having a touch sensing region including one or more touch nodes; a touch sensing signal output device for outputting information regarding touch inputs with respect to the one or more touch nodes; and a noise sensing electrode arranged on a non-sensing region that is formed between the sensing part and the touch sensing signal output device (30). A touch signal input port of the touch sensing signal output device is connected to wiring arranged on the non-sensing region, a noise signal input port of the touch sensing signal output device is connected to the noise sensing electrode and the touch sensing signal output device removes effects caused by noise introduced from the wiring, using a signal received from the noise sensing electrode.

Description

Noise removal method from non-detection area among touch input sensing devices

The present invention relates to a method of removing noise of a touch input sensing signal in a touch input sensing apparatus, and more particularly, to a method of removing noise introduced from an area other than a touch sensing area allocated for touch input sensing.

BACKGROUND ART As a user device that receives a user's command and outputs a result corresponding to the command on a display device, user devices referred to as smartphones, smart pads, and laptop computers have recently been disclosed. In particular, in these user devices, a user input device for receiving a user's command may include a touch input sensing device disposed near the display screen of the user device and covering the entire area of the display screen. Examples of such a touch input sensing device include a so-called pressure sensitive touch input sensing device, a capacitive touch input sensing device, and a stylus pen sensing device (hereinafter, simply a pen sensing device). The above sensing devices are products based on different technologies (hereinafter, touch input technologies). Since the above technologies have their own advantages and disadvantages, attempts have been made to provide a more convenient user input experience by combining the advantages of each other. The basic principle of operation of each of these techniques has been disclosed in several documents.

The touch input sensing device includes a touch panel including a front-end sensing device (that is, a sensing electrode unit or an end sensing unit) for sensing a touch input, and a touch IC receiving a signal from the touch panel. can do. The distal end sensor device may be a transparent / opaque electrode or a thin electrode. The touch panel and the touch IC may be connected by an FPCB or the like. The terminal sensor device corresponds to a touch sensing area allocated for touch input, but the area occupied by the FPCB is not a touch sensing area allocated for touch input. As described above, the touch sensing region, the region of the past, may be referred to as a “non-sensing region” in the present specification.

According to the touch input technology, when a touch input tool such as a finger is approached near an area occupied by the FPCB, an incorrect result such as a touch input occurs in the touch sensing area may occur.

In the present invention, when noise is applied to a non-sensing area that is not assigned as a touch sensing area, a technique for preventing an error of incorrectly determining that a touch input is made in the touch sensing area by the noise signal is provided.

According to an aspect of the present invention, a touch input sensing device 1 includes: a touch sensing area A2 including a sensing electrode unit including one or more touch nodes 100; A touch sensing signal output device 30 outputting information on touch inputs to the one or more touch nodes; And a noise sensing electrode (= noise sensing antenna) CA1 disposed in at least one of the touch sensing region and the non-sensing region A1 formed between the touch sensing region and the touch sensing signal output device. In this case, the touch signal input terminal of the touch sensing signal output device is connected to the at least one touch node and is connected to the wiring 2037 passing through the non-sensing area. The noise signal input terminal of the touch sensing signal output device is connected to the noise sensing electrode. The touch sensing signal output device is configured to eliminate the influence of noise flowing from the wiring by using the signal received from the noise sensing electrode.

In this case, the touch sensing signal output device may include: a touch input sensing unit 10 connected to the wire to sense information regarding a touch input to the touch sensing area; A noise detector (10_1) connected to the noise detection electrode to detect noise flowing from the non-sensing area or the touch sensing area; And a noise removing unit 40 for removing a component related to the noise included in the output value of the touch input sensing unit by using the output value of the noise sensing unit.

In this case, the touch node may be used as a common electrode of the display output device.

According to another aspect of the invention, the touch input sensing unit; A noise detector; And a touch sensing signal output device including a noise removing unit. In this case, the touch input sensing unit is connected to a wire connected to the touch node. The wiring passes through a touch sensing area including the touch node and a non-sensing area formed between the touch sensing area and the touch sensing signal output device. The noise detector is connected to a noise sensing electrode disposed in at least one of the touch sensing region and the non-sensing region to detect noise flowing from the touch sensing region or the non-sensing region. The noise removing unit is configured to remove the component related to the noise included in the output value of the touch input detecting unit by using the output value of the noise detecting unit.

In this case, a part of the noise sensing electrode is arranged on the touch sensing area.

According to the present invention, when noise is applied to a non-sensing area that is not allocated as a touch sensing area, a technique for preventing an error in which a touch input is incorrectly determined as being made by the touch signal by the noise signal can be provided.

1 illustrates a cross-sectional structure of an input / output panel constituting an integrated input / output device in which a touch input sensing device and a display device are combined according to an embodiment of the present invention.

2 illustrates a structure of an integrated input / output device according to an embodiment of the present invention.

3 shows a specific configuration of the touch input sensing device 1 according to an embodiment of the present invention.

FIG. 4A illustrates the operation principle of the touch input sensing device according to the embodiment of FIG. 3 and illustrates the configuration of the touch sensing signal output unit 20 in more detail. FIG. 4B illustrates the function of the MUX shown in FIG. 4A in more detail.

5 illustrates a configuration in which the touch IC 3 and the host computer 1120 are further connected to the touch input sensing device 1 shown in FIG. 3.

FIG. 6A illustrates a structure of a touch input sensing device provided according to an embodiment of the present invention in order to solve the problem described with reference to FIG. 4A.

6B is a modified embodiment of FIG. 6A.

FIG. 6C illustrates an IC 2 including the touch sensing signal output unit 30 shown in FIG. 6A, a plurality of noise sensing electrodes CA1, CA2, and CA3, a non-sensing region A1, a wiring 2037, and noise sensing. The connection relationship of the wiring 3037 is shown.

FIG. 7 illustrates a configuration in which the touch IC 3 and the host computer 1120 are further connected to the touch input sensing device illustrated in FIG. 6C as a modification of FIG. 5.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The terms used below are merely for referring to specific embodiments, and are not intended to limit the present invention. Also, the singular forms used below include the plural forms unless the phrases clearly indicate the opposite meanings.

1 illustrates a cross-sectional structure of an input / output panel constituting an integrated input / output device in which a touch input device and a display device are combined according to an embodiment of the present invention.

The input / output panel 1050 includes a liquid crystal display panel having a thin film transistor array substrate 1020, a color filter array substrate 1030, a liquid crystal layer 1040 filled between the two

substrates

1020 and 1030, and a thin film transistor array substrate ( It may include a backlight unit (BLU) 1060 formed under the 1020.

The thin film transistor array substrate 1020 may include gate lines and data lines formed to cross each other on the first substrate 1021, thin film transistors formed at intersections of the gate lines and the data lines, and formed in a liquid crystal cell unit. And a TFT array 1023 including pixel electrodes connected to thin film transistors, and an alignment film 1025 coated thereon. The gate lines and the data lines receive a signal from the driving circuits through the respective pad parts, and the thin film transistor may supply a pixel voltage signal supplied to the data line to the pixel electrode in response to a scan signal supplied to the gate line.

The color filter array substrate 1030 includes color filters 1033 formed in units of liquid crystal cells on the second substrate 1031, a black matrix 1035 for distinguishing between color filters and reflecting external light, and liquid crystal cells. It may include a common electrode (Vcom) 1037 for supplying a reference voltage to the common, and an alignment film 1039 coated on them. In this case, the common electrode (Vcom) 1037 may be divided into a number provided. That is, a plurality of common electrodes may exist. In addition, in one embodiment of the present invention, the plurality of common electrodes may be used as a device for detecting a touch input.

The integrated input / output device may include an input / output panel 1050, a timing controller 1101, a data driver 1102, a gate driver 1103, a host computer 1120, and a touch IC. In FIG. 2, for convenience, only the first substrate 1021 and the plurality of common electrodes Vcom 1037 in which the gate lines and the data lines are formed in the input / output panel 1050 are illustrated.

The input / output panel 1050 may include a color filter array, a thin film transistor array, a liquid crystal layer disposed therebetween, and a spacer for maintaining a cell gap of the liquid crystal layer. The color filter array may include an upper substrate, a color filter formed on one surface of the upper substrate, a black matrix, and a common electrode Vcom formed on the color filter and the black matrix. The thin film transistor array includes a lower substrate and a plurality of data lines (DL) 1104, a plurality of gate lines (GL) 1105, gate lines 1105, and a plurality of data lines (DL) 1104 formed to cross each other on one surface of the lower substrate. The thin film transistor may be formed in an area where the data line 1104 intersects, and pixels defined by the intersection of the gate line 1105 and the data line 1104. The lower polarizer may be disposed on the other surface of the lower substrate.

The backlight unit may be disposed under the input / output panel 1050. The backlight unit may uniformly irradiate light to the input / output panel 1050 including a plurality of light sources. The backlight unit may be implemented as a direct type backlight unit or an edge type backlight unit. The light source of the backlight unit may include any one or two or more light sources of a hot cathode fluorescent lamp (HCFL), a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (EEFL), and a light emitting diode (LED).

The data driver 1102 may sample and latch the digital video data RGB under the control of the timing controller 1101. The data driver 1102 may convert the digital video data RGB into a positive / negative gamma compensation voltage to reverse the polarity of the data voltage. The positive / negative data voltage output from the data driver 1102 may be synchronized with the gate pulse output from the gate driver 1103. Each of the source drive ICs of the data driver 1102 may be connected to the data lines 1104 of the input / output panel 1050 by a chip on glass (COG) process or a tape automated bonding (TAB) process. The source drive IC may be integrated in the timing controller 1101 and implemented as a one-chip IC together with the timing controller 1101.

The gate driver 1103 sequentially outputs a gate pulse (or scan pulse) in the display mode under the control of the timing controller 1101, and shifts the swing voltage of the output to a gate high voltage and a gate low voltage. The gate pulses output from the gate driver 1103 may be sequentially supplied to the gate lines 1105 in synchronization with the data voltages output from the data driver 1102. The gate high voltage may be a voltage higher than or equal to the threshold voltage of the thin film transistor T, and the gate low voltage may be lower than the threshold voltage of the thin film transistor T. The gate drive ICs of the gate driver 1103 may be connected to the gate lines 1105 of the lower substrate of the input / output panel 1050 through a TAP process, or may be connected to the gate lines 1105 of the input / output panel 1050 together with pixels through a GIP (Gate In Panel) process. It may be formed directly on the lower substrate.

The timing controller 1101 uses a timing signal from the host computer 1120 to adjust the data timing control signal for controlling the operation timing of the data driver 1102 and the polarity of the data voltage, and the operation timing of the gate driver 1103. A gate timing control signal for controlling may be generated.

The gate timing control signal may include a gate start pulse (GSP), a gate shift clock (GSC), a gate output enable signal (Gate Output Enable, GOE), and the like. The gate start pulse GSP is applied from the gate driver 1103 to the first gate drive IC that outputs the gate pulse first in every frame period to control the shift start timing of the gate drive IC. The gate shift clock GSC is commonly input to gate drive ICs of the gate driver 1103 to shift the gate start pulse GSP. The gate output enable signal GOE may control the output timing of the gate drive ICs of the gate driver 1103.

The data timing control signal includes a source start pulse (SSP), a source sampling clock (SSC), a polarity control signal (POL), and a source output enable signal (SOE). It may include. The source start pulse SSP may be applied to the first source drive IC sampling data first in the data driver 1102 to control the data sampling start timing. The source sampling clock SSC is a clock signal that controls sampling timing of data in the source drive ICs based on a rising or falling edge. The polarity control signal POL may control the polarity of the data voltages output from the source drive ICs. The source output enable signal SOE can control the output timing of the source drive ICs. If the digital video data RGB is input to the data driver 1102 through a low voltage differential signaling (LVDS) interface, the source start pulse SSP and the source sampling clock SSC may be omitted.

The host computer 1120 transmits the digital video data RGB of the input image and the timing signals Vsync, Hsync, DE, and MCLK required for driving the display through an interface such as an LVDS interface and a transition minimized differential signaling (TMDS) interface. It may transmit to the timing controller 1101.

In an embodiment of the present invention, the timing controller 1101, the data driver 1102, and the gate driver 1103 may be included in one DDI chip 2 (FIG. 6A). 6A illustrates an example in which the DDI chip 2 includes a timing controller 1101, a data driver 1102, and a gate driver 1103 for convenience of description.

Hereinafter, in the present specification, the common electrode 1037 may be referred to as a 'VCOM electrode 1037'. In this case, the common electrodes may be arranged in an M * N matrix, and in the example of FIG. 2, M = 6 and N = 6. Hereinafter, the common electrode 1037 intersecting in the p-th row and the q-th column may be referred to as VCOM, pq. For example, the common electrode 1037 intersecting in the second row and the third column may be denoted as VCOM, 23.

In one embodiment, the common electrodes 1037 may be used as a component for outputting the screen in the first time period, and may be used as a component for checking the touch input in the second time period.

FIG. 2 illustrates a configuration according to an embodiment of the present invention, in which a common electrode included in a display output device is used as a terminal sensing device of a touch input sensing device. However, in another embodiment of the present invention, FIG. Alternatively, the end sensing device may be provided on a different layer from the display output device. One embodiment according to the present invention does not depend on whether the end sensing device is integrally formed with the display output device.

The touch input sensing device 1 uses a plurality of touch nodes 100 arranged in a predetermined manner, and touches at each touch node 100 using electrical characteristics detected from the plurality of touch nodes 100. One or more touch sensing signal output units 20, 20_1, 20_2, 20_3,..., 20_9 that measure information on whether or not the touch input is performed and the touch input level, the touch nodes 100 and the touch sensing signal output unit 20. ) May include a plurality of wires 2037 that connect between them. In FIG. 3, one wire 2037 is connected to only one touch node 100. In the example of FIG. 3, the touch nodes 100 are arranged in a 6 * 6 matrix, and include six columns C1 to C6 and six rows R1 to R6.

In this case, an area formed of the touch nodes 100 may be referred to as a touch sensing area A2.

The touch sensing signal output units 20 may be included in the IC 2 provided independently from the touch nodes 100 forming the touch sensing region. In this case, the independent IC may be a touch IC that processes only a touch input signal or a display driving IC (DDI) that processes a display control signal and a touch input signal together. In the latter case, the IC 2 of FIG. 3 may further include other functional units not shown, for example, functional units corresponding to reference

numerals

1101, 1102, 1103, and 1104 of FIG. 2.

There may be a physical space between the touch sensing area A2 and the IC 2, which is not intended to be used as the touch sensing area. Therefore, a certain area between the touch sensing area A2 and the IC 2 may be referred to as a non-sensing area A1. In this case, a portion of the wiring 2037 may be disposed in an area between the touch sensing area A2 and the IC 2, and a portion of the wiring 2037 may be formed and provided on the FPCB.

Six wires 2037 are arranged on each touch node 100, but only one wire 2037 is electrically connected to each touch node 100. The positions where the coupling portion of each touch node 100 and the wiring 2027 exist are indicated by triangles, squares, pentagons, and circles.

In the embodiment of FIG. 3, the 36 touch nodes 100 may be divided into four groups. Groups A, B, C, and D include touch nodes having coupling portions represented by triangles, squares, pentagons, and circles, respectively. For example, group A may include a touch node (TN, 11, TN, 13, TN, 15, TN, 31, TN, 33, TN, 35, TN, 51, TN, 53, TN, 55).

In the embodiment of FIG. 3, a total of nine touch sensing signal output units 20 are provided, and four wires 2037 are connected to each touch sensing signal output unit 20. At this time, through each touch detection signal output unit 20, the wiring 2037, one touch node belonging to group A, one touch node belonging to group B, one touch node belonging to group C, and group D It can be connected to one touch node to which it belongs.

The touch sensing signal output unit 20 may include a touch input sensing circuit 10 and a MUX M1. Four signals input to the touch sensing signal output unit 20 may be provided from four wires 2037 connected to four touch nodes 100, TN, 11, TN, 12, TN, 21, TN, and 22. Can be. The four signals may be provided to the input of the MUX M1.

Referring to the structure of the MUX illustrated in FIG. 4B, each MUX may have a function of selecting one or more of four inputs IN1 to IN4 and connecting them to the output terminal OUT. Thus, two or more inputs can be connected to the output at the same time. For this purpose, a 4-bit input selector (Sel-4bit) may be provided. At this time, the four signals are the flow of current flowing through the four wires 2037, the flow of the current can be superimposed through the switches (SW1, SW2, SW3, SW4) included in the MUX. The combined value may be output through the output terminal OUT.

The touch input sensing circuit 10 may include an operational amplifier 215 and an integrating capacitor Cf connected between the inverting input terminal and the output terminal of the operational amplifier 215. In this case, a predetermined voltage signal Vdp may be input to the non-inverting input terminal of the operational amplifier 210. For convenience, the input terminal 11 of the touch input sensing circuit 10 may be defined, and the input terminal 11 may be the same terminal as the inverting input terminal of the operational amplifier 215. The input terminal 11 may be connected to the output terminal OUT of the MUX M1.

The voltage signal Vdp may be a signal having periodicity. Furthermore, it may be a periodic signal in which the DC component is zero, that is, an AC periodic signal. Alternatively, the voltage signal Vdp may not be a periodic signal, but may be a signal having a component of frequency fc. Or it may be a DC signal having a predetermined voltage.

The value of the output signal ① of the touch input sensing circuit 10 may be determined by the value of the current flowing through the input terminal 11. The magnitude of the current flowing through the input terminal 11 may be influenced by the magnitude of the capacitance formed between the touch nodes TN, 11, TN12, TN, 21, TN, 22 and the finger 17. . Therefore, it is possible to find out whether a touch input is made to the touch nodes TN, 11, TN12, TN, 21, TN, and 22 by using the value of the output signal ①. In an embodiment, when a parasitic capacitance (not shown) is connected to the output terminal OUT of the MUX M1, the magnitude of the current flowing through the input terminal 11 may be affected by the parasitic capacitance.

In FIG. 4A, a process of checking whether a touch input is made at the touch nodes TN, 11, TN12, TN, 21, TN, and 22 may be periodically updated. When the update is necessary, the switch SWr is It may be reset to on state for a while.

Meanwhile, a part of the wiring 2037_1 connected to the touch node TN 11 may pass through the non-sensing area A1 in FIG. 4A. In this case, although a touch input is not applied to the touch node TN 11, a capacitance Cn may be formed between the finger and the portion of the wiring 2037_1 when a touch is made on the non-sensing area A1. . At this time, the current i11 may be formed and flow by the capacitance Cn. Due to this current i11, the touch input sensing circuit 10 may output a specific value, and as a result, it may be determined that the touch input is made to the touch node TN11d. In this case, however, since the touch is actually made in the non-sensing area A1, it should not be determined that the touch input is made. Nevertheless, according to the circuit shown in FIG. 4A, the touch input sensing circuit 10 does not know whether the touch is made in the touch node TN or 11 or in the non-sensing area A1. There is this.

The above phenomenon may occur even when noise caused by external electromagnetic waves flows into the non-sensing area A1. That is, even at this time, the current i11 may be formed.

Each touch node 100 is electrically separated from each other, and each touch node 100 may be connected to the IC 2 through a wire 2037. In some embodiments, the IC 2 may include a timing controller 1101, a data driver 1102, and a gate driver 1103 shown in FIG. 2. The size of the gap between each touch node 100 shown in FIG. 5 may be exaggerated for convenience of description.

The IC 2 may include one or more touch sensing signal output units 20 shown in FIG. 4A. In FIG. 5, the indexes of the touch sensing signal output units are denoted by 20_k (k = 1, 2, 3, ... 9), and the indexes of 36 touch nodes are Ak, Bk, Ck, and Dk (where, k = 1, 2, 3, ... 9). In this case, the touch detection signal output unit 20_k selects and inputs any one or a plurality of touch nodes Ak, Bk, Ck, and Dk (where k = 1, 2, 3, ..., or 9). It is to be received.

Since there are four touch nodes 100 connected to each touch sensing signal output unit 20_k, a total of 36 touch nodes may be divided into four groups. In FIG. 5, the four groups are group A, group B, group C, and group D, and each group includes nine touch nodes. The group A includes touch nodes A1 to A9, the group B includes touch nodes B1 to B9, the group C includes touch nodes C1 to C9, and the group D Touch nodes D1 to D9 are included.

The touch detection signal output unit 20_k is configured to output whether a touch input is made at any one or more than one of the touch nodes connected to the touch detection signal output unit 20_k. In addition, the touch detection signal output unit 20_k outputs a value related to the input intensity when a touch input is made. The output values ① of the plurality of touch sensing signal output units 20_k may be provided to the touch IC 3. The touch IC 3 may determine a touch coordinate by calculating which part of a plurality of touch nodes a touch input is made based on the output values ①. The host computer 1120 may receive the touch coordinates from the touch IC 3 and execute an application corresponding to the touch coordinates.

According to the exemplary embodiment, the touch IC 3 may be provided integrally with the IC 2.

The touch sensing signal output unit 30 shown in FIG. 6A is another component added to the touch sensing signal output unit 20 shown in FIG. 4A.

In the touch input sensing device according to FIG. 6A, the noise sensing electrode CA1 may be provided in the non-sensing area A1 to obtain information about a touch event or an external noise input event occurring on the non-sensing area A1. In this case, it may be understood that the noise sensing electrode CA1 may have a different shape according to a design example of the touch input sensing device.

For example, when the finger is present near the wiring 2037 on the non-sensing area A1, not only the capacitance Cn is formed between the finger and the wiring 2037, but also the capacitance between the finger and the noise sensing electrode CA1. (Cn ') may be formed. At this time, it can be easily understood that there will be a predetermined correlation between the capacitance Cn and the capacitance Cn '. Therefore, when the noise detection electrode CA1 is connected to the noise detection unit 10_1 through the noise detection wire 3037, a value related to the capacitance Cn ′ may be obtained.

In this case, for example, the noise detector 10_1 may be formed of a circuit having the same configuration as that of the touch input sensing circuit 10 (however, each parameter value of the device may be different). In this case, when the finger is positioned on the noise sensing electrode CA1, the noise current i11 ′ may flow through the noise sensing wiring 3037, and the noise current i11 ′ may be passed through the noise sensing unit 10_1. Can be integrated to output the associated value.

In this case, the noise removing unit 40 may remove the influence of noise generated in the non-sensing area A1 from the output of the touch input detecting circuit 10 by using the output value of the noise detecting unit 10_1.

In one embodiment, the noise sensing electrode CA1 may be disposed on the same layer as the wiring 2037. In this case, the shape of the noise sensing electrode CA1 may be provided in a shape that does not overlap the wiring 2037. The noise sensing electrode CA1 may be made of a conductive material and may be connected to a predetermined reference potential through a capacitor having a predetermined value in some cases. In this case, the capacitor having the same value may be formed of parasitic capacitances present in the touch node connected to the wirings 2017 that exist near the noise sensing electrode CA1.

The noise sensing electrode CA1 and the wiring 2037 must be insulated from each other. The wiring 2037 and the noise sensing wiring 3037 must be insulated from each other. It will be appreciated that an insulating layer for the insulation may be provided.

The noise detection electrode CA1 and the noise detection wire 3037 should be electrically connected to each other.

Since the noise sensing electrode CA1 is disposed on the same layer as the wiring 2037, the noise sensing wiring 3037 and the wiring 2037 are mutually connected to connect the noise sensing electrode CA1 and the noise sensing wiring 3037. In the case of crossing, an insulating layer may be provided at this crossing area.

In another embodiment, the noise sensing electrode CA1 may be disposed on a layer different from the wiring 2037. In this case, the shape of the noise sensing electrode CA1 may vary according to a specific design.

6B is a modified embodiment of FIG. 6A.

Another IC 231, for example, a display driver IC, may be provided between the touch sensing area A1 and the touch sensing signal output unit 30. That is, the IC 231 may exist in a region through which the wiring 2037 passes. Therefore, the non-sensing area may be physically divided into the first non-sensing area A1_1 and the second non-sensing area A1_2. In this case, a first noise detection electrode CA1_1 may be provided in the first non-sensing area A1_1, and a second noise detection electrode CA1_2 may be provided in the second non-sensing area A1_2. The noise sensing electrode CA1 and the noise sensing electrode CA1_1 may be connected together to the noise sensing wire 3037. The noise detection wire 3037 transmits the first noise current i11_1 and the second noise current i11_2 flowing through the first noise detection electrode CA1_1 and the second noise detection electrode CA1_2 to the noise detection unit 10_1. Can provide.

In this case, the another IC 231 may include a function unit 232 that may perform a unique function assigned to the IC 231, and the wiring 2037 may simply pass through the IC 231.

A plurality of noise sensing electrodes CA1, CA2, and CA3 may be disposed in the non-sensing area A1. The number, shape, and layout of the noise sensing electrodes CA1, CA2, and CA3 may include arrangement of touch nodes in the touch sensing area A2, arrangement of the touch sensing signal output units 30 in the IC 2, and wiring. 2037 may be designed differently from one embodiment to another based on the arrangement of the arrangements.

In one embodiment, one noise sensing electrode may be designed to cover only the wirings 2037 connected to one touch sensing signal output unit 30. In another embodiment, one noise sensing electrode may be more than two touches. It may have to be designed to cover the wirings 2037 connected to the sensing signal output unit 30. In the latter case, the noise sensing wire 3037 connected to one noise sensing electrode may be commonly connected to the plurality of touch sensing signal output units 30. In the case of Figure 6c corresponds to the latter.

In FIG. 7 and FIG. 5, descriptions of parts common to each other will be omitted.

The touch detection signal output unit 30_k is configured to output whether a touch input is made at any one or more than one of the touch nodes connected to the touch detection signal output unit 30_k. In addition, the touch detection signal output unit 30_k outputs a value related to the input intensity when a touch input is made. The output values ② of the plurality of touch sensing signal output units 30_k may be provided to the touch IC 3. The touch IC 3 may determine a touch coordinate by calculating which part of a plurality of touch nodes a touch input is made based on the output values ②.

According to the configuration of FIG. 7, even when a touch event occurs in the non-sensing area A1 and noise occurs, the influence thereof may be eliminated.

In the above-described embodiment, the touch node has a 6 * 6 matrix structure, but may be arranged to have an arbitrary number of rows and columns, for example, a 12 * 22 matrix structure. The touch nodes may be disposed on a plane, but may also be disposed on a curved surface. The touch nodes may be arranged in a matrix form on two axes orthogonal to each other, or may be arranged in a zigzag structure like a honeycomb structure. In addition, even if the touch nodes are arranged in a three-dimensional structure can be applied to the spirit of the present invention.

Although the above-described embodiments are examples of a self capacitive touch structure, it can be understood that the capacitive touch structure can be applied to a mutual capacitive touch structure. This is because, in the mutual capacitive touch structure, when a touch event occurs in the non-sensing area, the influence in the non-sensing area is sensed by a method similar to the self-capacitance method.

The noise detection electrodes described above are disposed on the non-sensing area A1, and a part of the noise detection electrodes may be extended to the touch detection area A2. For example, it may be assumed that a touch input is made to the touch node A1 of FIG. 7. In this case, although no touch input is made to the touch node D1 of FIG. 7, it may be assumed that noise is introduced through the touch node D1. In this case, when the noise sensing electrode CA1 connected to the touch sensing signal output unit 30_1 extends to the position of the touch node D1, the touch sensing signal output unit 30_1 is connected to the noise sensing electrode CA1. The influence of the noise introduced into the touch node D1 may be measured, and the influence of the noise may be removed.

In a modified embodiment of the present invention, the noise sensing electrode may be disposed only on the touch sensing region, not on the non-sensing region.

In addition, in the above-described embodiment, the case in which the electrodes used as the terminal sensor device are shared by the display output device and the touch input sensing device is described. However, it can be easily understood that the spirit of the present invention can be applied even when the electrodes used as the terminal sensor device are provided separately regardless of the display output device.

By using the embodiments of the present invention described above, those belonging to the technical field of the present invention will be able to easily make various changes and modifications without departing from the essential characteristics of the present invention. The content of each claim in the claims may be combined in another claim without citations within the scope of the claims.

Claims

A touch sensing area including a sensing electrode unit including one or more touch nodes;

A touch sensing signal output device for outputting information regarding touch inputs to the one or more touch nodes; And

A noise sensing electrode disposed in at least one of the touch sensing region and the non-sensing region formed between the touch sensing region and the touch sensing signal output device;

Including;

The touch signal input terminal of the touch sensing signal output device is connected to one or more touch nodes and is connected to a wire passing through the non-sensing area.

The noise signal input terminal of the touch sensing signal output device is connected to the noise sensing electrode,

The touch sensing signal output device is configured to eliminate the influence of noise introduced from the wiring by using a signal received from the noise sensing electrode.

Touch input sensing device.
The method of claim 1,

The touch detection signal output device,

A touch input sensing unit connected to the wire to sense information regarding a touch input to the touch sensing area;

A noise detector connected to the noise detection electrode to detect noise flowing from the non-sensing area or the touch sensing area; And

A noise removing unit for removing a component related to the noise contained in the output value of the touch input sensing unit by using the output value of the noise sensing unit.

Including,

Touch input sensing device.
The method of claim 1,

And the touch node is used as a common electrode of a display output device.
A touch input sensing unit; A noise detector; And a noise sensing unit including a noise removing unit,

The touch input sensing unit is connected to a wire connected to the touch node.

The wiring passes through a touch sensing area including the touch node and a non-sensing area formed between the touch sensing area and the touch sensing signal output device.

The noise detector is connected to a noise sensing electrode disposed in at least one of the touch sensing region and the non-sensing region to detect noise flowing from the touch sensing region or the non-sensing region.

The noise removing unit is configured to remove the component related to the noise included in the output value of the touch input detecting unit by using the output value of the noise detecting unit.

Touch detection signal output device.
The touch sensing signal output device according to claim 4, wherein a part of the noise sensing electrode is arranged on the touch sensing area.
The method of claim 4, wherein

And the touch node is used as a common electrode of a display output device.