KR101829674B1 - Method for acquiring touch input data of a specific sensing electrode by connecting a plurality of independent sensing electrodes to each other - Google Patents

Abstract

A first step of connecting N1 sensing electrodes selected from among M sensing electrodes to an input terminal of a sensing circuit during a first time period to obtain a first output value from the sensing circuit; A second step of acquiring a second output value from the sensing circuit by connecting N2 sensing electrodes selected from the M sensing electrodes together to the input terminal of the sensing circuit during a second time period; And a third step of calculating information about a touch input to one of the M sensing electrodes using the first output value and the second output value.

Description

[0001] The present invention relates to a method for acquiring touch input information for a specific sensing electrode by connecting a plurality of independent sensing electrodes to each other,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a technique for acquiring touch input information for a specific sensing electrode in a self-charging type touch input sensing apparatus.

User devices, which are called smart phones, smart pads, and laptop computers, have recently been disclosed as user devices that receive commands from a user and output the results corresponding to the commands to a display device. Particularly, in these user devices, a user input device for inputting a user's command may include a device disposed near the display screen of the user device and covering the entire area of the display screen. Examples of such a user input device include a so-called pressure sensitive type touch panel, an electrostatic type touch panel, and a stylus pen touch panel (hereinafter, simply referred to as a pen touch panel). The above touch panels are products based on different technologies (hereinafter referred to as touch input technology). Since each of the above technologies has its advantages and disadvantages, an attempt has been made to provide a more convenient user input experience by providing a combination of advantages of each other. The basic operating principle of each of the above technologies is disclosed in various documents.

The present invention provides a method for increasing the SNR of a touch input sensing field.

The touch input detection method according to one aspect of the present invention detects N1 (= 3) sensing electrodes A, B, and C selected from M (= 4) sensing electrodes during the first time interval 52A A first step of obtaining a first output value y [0] from the sensing circuit by being connected to an input terminal of the circuit; During the second time period 52B, N2 (= 3) sensing electrodes A, B, and D selected from the M (= 4) sensing electrodes are connected to the input terminal of the sensing circuit, A second step of obtaining a second output value y [1] from the circuit; And information on the touch input is calculated for any one of the M (= 4) sense electrodes using the first output value y [0] and the second output value y [1] And a third step.

According to another aspect of the present invention, there is provided a touch input information calculating method including: first information including a definition of p time points (T_v); Using the second information including the definition of the sense electrode combination (TEC_v) defined corresponding to each of the p time periods (T_v) and composed of N_v number of sense electrodes selected from the plurality of sense electrodes, And information on the touch input to any one of the sensing electrodes is calculated. Here, p is an integer of 2 or more, and v is an integer of 1 to p. At this time, the different sensing electrode combinations belonging to the p sensing electrode combinations are composed of different combinations of sensing electrodes. The method includes the steps of: connecting all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v to an input terminal of any touch sensing circuit to obtain an output value TO_v from the arbitrary touch sensing circuit; And calculating the information on the touch input to one of the plurality of sensing electrodes using the p output values TO_v.

In this case, the number of the plurality of sensing electrodes is p, the p is an integer of 3 or more, N_v satisfies N_v = p-1, and N_v can be an integer of 2 or more.

At this time, the plurality of sensing electrodes may be arranged in a matrix form.

At this time, the plurality of sensing electrodes may be provided separately from the display panel and disposed on the display panel.

At this time, the display panel may be any one of a TFT panel and an IPS panel.

In this case, the plurality of sensing electrodes may be a plurality of separate common electrodes used as components of the display panel for the operation of the display panel.

At this time, the plurality of sensing electrodes may be connected to the input terminals of one or more touch input sensing circuits allocated in a predetermined manner during the p number of time periods T_v.

At this time, the plurality of sensing electrodes may be connected to a predetermined reference potential Vref2 during at least a part of the time other than the p time periods T_v.

At this time, the plurality of sensing electrodes may be adjacent to each other.

At this time, the N_v may be a constant irrespective of the v value.

At this time, the first sensing electrode among the plurality of sensing electrodes is not adjacent to any of the sensing electrodes except the first sensing electrode among the plurality of sensing electrodes, and all of the sensing electrodes adjacent to the first sensing electrode The sensing electrode may not be included in the plurality of sensing electrodes.

The touch sensing circuit TSC_a and the touch sensing circuit TSC_b are connected to the touch sensing circuit TSC_v when the arbitrary touch sensing circuit connected to all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v is represented as TSC_v May be the same touch sensing circuit. Provided that a and b are different values, and a and b are an integer of 1 to p, respectively.

The touch sensing circuit TSC_a and the touch sensing circuit TSC_b are connected to the touch sensing circuit TSC_v when the arbitrary touch sensing circuit connected to all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v is represented as TSC_v It may be a different touch sensing circuit. Provided that a and b are different values, and a and b are an integer of 1 to p, respectively.

According to an aspect of the present invention, there is provided a touch input sensing apparatus including: a plurality of sensing electrodes; One or more touch sensing circuits; And a processing unit. Here, the processing unit may include first information including a definition of p time points T_v; Using the second information including the definition of the sense electrode combination (TEC_v) defined corresponding to each of the p time periods (T_v) and composed of N_v number of sense electrodes selected from the plurality of sense electrodes, And a method of calculating information about touch input to any one of the sensing electrodes. Here, p is an integer of 2 or more, and v is an integer of 1 to p. At this time, the different sensing electrode combinations belonging to the p sensing electrode combinations are composed of different combinations of sensing electrodes. The processing unit may further include a step of acquiring an output value TO_v from the arbitrary touch sensing circuit by connecting all of the sensing electrodes belonging to the sensing electrode combination TEC_v to the input terminal of the arbitrary touch sensing circuit during the time period T_v ; And calculating the information on the touch input to one of the plurality of sensing electrodes using the p output values TO_v.

According to the present invention, it is possible to provide a method of increasing the SNR by increasing the time for the touch input sensing device to receive an input signal from one sensing electrode.

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.
2 illustrates a structure of an integrated input / output device according to an embodiment of the present invention.
FIG. 3 shows in more detail the configuration in the vicinity of the four VCOM electrodes A1, B1, C1, and D1 on the upper left side of FIG.
Fig. 4A shows the structure near the image pixel N11 shown in Fig. 3 in more detail.
FIG. 4B shows the structure near VCOM, 11 shown in FIG. 3 in more detail.
FIG. 5A is a diagram for explaining the configuration and operation principle of a circuit for detecting whether touch input has been performed on a specific common electrode VCOM, xx according to an embodiment of the present invention.
FIG. 5B shows an example in which the waveform of the periodic voltage signal Vdp shown in FIG. 5A is provided in the form of a periodic AC waveform without a DC component
Fig. 5C shows a circuit structure according to an embodiment of the present invention for eliminating the influence of parasitic capacitance in the circuit of Fig. 4B.
6A shows a configuration of a touch input sensing circuit provided according to an embodiment of the present invention.
6B shows the connection relationship of another multiplexer 555 or switch 555 not shown in FIG. 6A.
FIG. 7A is an example of an internal structure showing the function of the MUX shown in FIG. 6A.
FIG. 7B is another example of the internal structure showing the function of the MUX shown in FIG. 6A.
8A is a timing chart for explaining a method of driving the touch input sensing circuit according to an embodiment of the present invention.
8B is a modification of the driving method of the touch input sensing circuit according to FIG. 8A.
FIG. 8C is a modification of the driving method of the touch input sensing circuit according to FIG. 8A.
FIG. 8D is a modification of the driving method of the touch input sensing circuit according to FIG. 8C.
FIG. 9A is a timing chart for explaining an operation method of the touch input sensing circuit according to FIG. 2 during a touch input sensing wait time according to an embodiment of the present invention.
9B shows an example in which the MUX M1 of FIG. 6A connects the VCOM, 11, VCOM, 12, VCOM, 21, VCOM, and 22 to the touch sensing signal output unit 10 all at once.
10 is a diagram for explaining a method of detecting whether a touch input event has occurred on a specific VCOM electrode according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. Also, the singular forms as used below include plural forms unless the phrases expressly have the opposite meaning.

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 thin film transistor array substrate 1020, a color filter array substrate 1030, a liquid crystal display panel having a liquid crystal layer 1040 filled between the two substrates 1020 and 1030, (BLU) 1060 formed on the lower side of the display unit 1020. [

The thin film transistor array substrate 1020 includes 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, A TFT array 1023 including pixel electrodes connected to the thin film transistors, and an alignment film 1025 coated thereon. The gate lines and the data lines are supplied with signals from the driving circuits through respective pad portions, and the thin film transistors can supply pixel voltage signals to the pixel electrodes in response to the scan signals supplied to the gate lines.

The color filter array substrate 1030 includes color filters 1033 formed on a second substrate 1031 in units of a liquid crystal cell, a black matrix 1035 for separating color filters and reflecting external light, A common electrode (Vcom) 1037 for supplying a common reference voltage to the common electrode (Vcom) 1037, and an alignment film 1039 applied thereon. At this time, the common electrode (Vcom) 1037 may be divided into several parts. That is, a plurality of common electrodes may exist. In an embodiment of the present invention, the plurality of common electrodes may be utilized as an element for touch input sensing.

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

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. 2, only a first substrate 1021 and a plurality of common electrodes (Vcom) 1037 having gate lines and data lines in the input / output panel 1050 are shown for the sake of convenience.

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 the 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 and a plurality of gate lines (GL) 1105, gate lines 1105, A thin film transistor formed in a region where the data line 1104 intersects and a pixel defined by the intersection of the gate line 1105 and the data line 1104. [ A lower polarizer may be disposed on the other surface of the lower substrate.

The backlight unit may be disposed below the input / output panel 1050. The backlight unit may include a plurality of light sources to uniformly irradiate the input / output panel 1050 with light. 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 at least one of a hot cathode fluorescent lamp (HCFL), a cold cathode fluorescent lamp (CCFL), an external electro fluorescent lamp (EEFL), and a light emitting diode (LED).

The data driver 1102 can 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 to a positive / negative gamma compensation voltage to invert the polarity of the data voltage. The positive / negative polarity data voltages output from the data driver 1102 may be synchronized with gate pulses output from the gate driver 1103. Each of the source driver ICs of the data driver 1102 may be connected to the data lines 1104 of the input / output panel 1050 by a COG (Chip On Glass) process or a TAB (Tape Automated Bonding) 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 gate pulses (or scan pulses) in the display mode under the control of the timing controller 1101, and shifts the swing voltage of the output to the gate high voltage and the gate low voltage. The gate pulse output from the gate driver 1103 may be sequentially supplied to the gate lines 1105 in synchronization with the data voltage output from the data driver 1102. The gate high voltage may be a voltage equal to or higher than 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 are connected to the gate lines 1105 of the lower substrate of the input / output panel 1050 through a TAP process or connected to the gate lines 1105 of the input / And may be formed directly on the lower substrate.

The timing controller 1101 uses a timing signal from the host computer 1120 to generate a data timing control signal for controlling the operation timing of the data driver 1102 and the polarity of the data voltage and an operation timing of the gate driver 1103 And generate a gate timing control signal for controlling.

The gate timing control signal may include a gate start pulse (GSP), a gate shift clock (GSC), a gate output enable signal (GOE), and the like. The gate start pulse GSP is applied from the gate driver 1103 to the first gate driver IC which outputs the gate pulse first in every frame period, so as to control the shift start timing of the gate driver IC. The gate shift clock GSC is a clock signal commonly input to the gate drive ICs of the gate driver 1103 to shift the gate start pulse GSP. The gate output enable signal GOE can 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) . ≪ / RTI > The source start pulse SSP may be applied to the first source drive IC that samples the 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 the sampling timing of data in the source drive ICs based on the rising or falling edge. The polarity control signal POL can control the polarity of the data voltage output from the source drive ICs. The source output enable signal SOE can control the output timing of the source drive ICs. The source start pulse SSP and the source sampling clock SSC may be omitted if digital video data RGB is input to the data driver 1102 through the Low Voltage Differential Signaling (LVDS) interface.

The host computer 1120 transmits the digital video data RGB of the input image and the timing signals Vsync, Hsync, DE and MCLK necessary for the display driving through an interface such as an LVDS interface and a TMDS (Transition Minimized Differential Signaling) To the timing controller 1101.

In one 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 shows 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 explanation.

Hereinafter, the common electrode 1037 may be referred to as a " VCOM electrode 1037 ". In this case, the common electrodes may be arranged in the form of an M * N matrix. 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 denoted 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 part for screen output in the first time period and as a part for confirming whether the touch input is performed in the second time period.

FIG. 3 shows in more detail the configuration in the vicinity of the four VCOM electrodes A1, B1, C1, and D1 on the upper left side of FIG.

The plurality of data lines DL1, DL2, DL3, ... extend in the vertical direction in the drawing, and the plurality of gate lines GL1, GL2, GL3, ... extend in the left- have. By controlling the potentials applied to the data lines DL1, DL2, DL3, ... and the gate lines GL1, GL2, GL3, ..., It is possible to control the image output from the image pixel. Here, the image pixels existing at the intersection are denoted by Nxy. For example, an image pixel at a node where the data line DL1 and the gate line GL1 intersect is denoted by N11.

In FIG. 3, two data lines and two gate lines are illustrated as one VCOM electrode. However, the number of data lines and gate lines passing through the area occupied by one VCOM electrode may be larger or smaller.

Fig. 4A shows the structure near the image pixel N11 shown in Fig. 3 in more detail.

Referring to FIG. 4A, the electric signal applied through the data line DL1 affects the transistor T11, in which the gate line GL1 adjusts the gate voltage of the transistor T11. At this time, the data line DL1, the gate line GL1, the transistor T11, and the pixel electrode VCOM 11 exist in the vicinity of the image pixel N11. There are various capacitors 61 to 66 between these components. Some of these capacitors 61-66 are intentionally formed, and others may be capacitors that occur unintentionally. In FIG. 4A, a total of six capacitors 61 to 66 are modeled, but they may be modeled by different numbers. Hereinafter, an explanation will be given on the assumption that six models are modeled.

Nevertheless, the touch input sensing characteristics are determined by the capacitors (64, 65, 66) directly connected to the VCOM, 11 and the capacitance (? Cx, 11) formed between the VCOM, 11 and the touch input tool I can understand. At this time, from the viewpoint of touch input processing, the capacitors 61 to 66 and the like can be collectively regarded as parasitic capacitors C11.

The parasitic capacitor C11 may be regarded as a capacitor having the nodes n11 to n12 as the first pole and the nodes n21 to n24 as the second pole.

In the circuit model shown in Fig. 4A, the parasitic capacitor C11 is connected to three points of VCOM, 11, a data line DL1, and a gate line GL1. One terminal of the parasitic capacitor C11 may be regarded as a portion connected to the VCOM 11 and the other terminal may be regarded as a portion connected to the data line DL1 and the gate line GL1.

Since the amount of charge flowing between the VCOM 11 and the capacitors 64, 65 and 66 changes together according to the variable electrical properties of the data line DL1 and the gate line GL1, the parasitic capacitor? And the symbol Δ is also included.

FIG. 4B shows the structure near VCOM, 11 shown in FIG. 3 in more detail.

Four picture pixels N11, N12, N21 and N22 can be formed because the two data lines DL1 and DL2 and the two gate lines GL1 and GL2 pass through the VCOM 11. Therefore, four parasitic capacitors C11, C12, C21 and C22 can be connected to the VCOM 11. A capacitance (? Cx, 11) may be formed between the VCOM 11 and the touch input tool 17 when a touch input is present in the VCOM 11. At this time, since the value of the capacitance? Cx, 11 varies depending on the presence or proximity of the touch input tool 17, the symbol?

FIG. 5A is a diagram for explaining the configuration and operation principle of a circuit for detecting whether touch input has been performed on a specific common electrode VCOM, xx according to an embodiment of the present invention.

The touch input sensing circuit 10 shown in FIG. 5A 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. At this time, the voltage signal Vdp may be input to the non-inverting input terminal of the operational amplifier 215. [ For convenience, the input terminal 11 of the touch input sensing circuit 10 can be defined. 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 VCOM, xx.

The voltage signal Vdp may be a signal having periodicity. Furthermore, the DC component may be a periodic signal having zero (zero), that is, an AC periodic signal. Or the voltage signal Vdp may not be a periodic signal, but may be a signal having a component of the frequency fc.

5A, the magnitude of the current flowing through the nodes Nx and xx is equal to the sum of the capacitances Cx and xx formed between the common electrodes VCOM and xx and the finger 17 and the parasitic capacitances Cp and xx It can be influenced by the size of the capacitance. This equivalent capacitance can be named Cxe. The parasitic capacitances Cp and xx represent the result of modeling all the parasitic capacitances connected to the common electrodes VCOM and xx as one capacitor. For example, in the case of the common electrode VCOM 11 shown in FIG. 4B, the parasitic capacitances Cp and xx may be modeled by one capacitor with the influence of the four parasitic capacitors C11, C12, C21 and C22.

In FIG. 5A, the process of determining whether or not a touch input has been made on the common electrodes VCOM, xx may be periodically updated, and when the update is necessary, the switch SWr may be reset to the on state for a while .

FIG. 5B shows an example in which the waveform of the periodic voltage signal Vdp shown in FIG. 5A is provided in the form of a periodic AC waveform without a DC component

5B shows an AC sine wave, FIG. 5B shows an AC triangle wave, and FIG. 5C shows an AC square wave. In each case, the output voltage Vo of the operational amplifier 215 outputs a waveform of the same or similar type as the AC sine wave, the AC triangle wave, and the AC square wave. The output voltage Vo may have a frequency component different from the center frequency fc, and the other frequency components may be (1) a frequency component inherent in the voltage signal Vdp, or (2) a voltage May be a frequency component generated by distortion from the signal (Vdp), or (3) a frequency component provided by noise introduced from the outside.

At this time, the amplitude of the output voltage Vo may be proportional to the magnitude of the above-described equivalent capacitance Cxe and tend to be inversely proportional to the magnitude of the integral capacitor Cf. Therefore, since the size of the integral capacitor Cf is known in advance, the magnitude of the equivalent capacitance Cxe can be calculated by measuring the amplitude of the output voltage Vo. At this time, if the values of the parasitic capacitances Cp and xx can be known in advance, the values of the capacitances Cx and xx formed between the electrode pads VCOM and xx and the finger 17 can be obtained.

The amplitude of the output voltage Vo can be directly measured in the case where the waveform of the periodic voltage signal Vdp is provided in the form of a periodic AC waveform having no DC component, Can be mixed to measure the output voltage. In this case, only the frequency component equal to the sinusoidal wave among the components of the output voltage Vo can be extracted. (Sin (2? Fc)) equal to the center frequency fc of the voltage signal Vdp can be used as the sinusoidal wave. As a result, the noise components of the frequency components other than the center frequency fc can be eliminated.

Fig. 5C shows a circuit structure according to an embodiment of the present invention for eliminating the influence of parasitic capacitance in the circuit of Fig. 4B.

The voltage of the inverting input terminal (-) of the operational amplifier 215 is regarded as equal to the voltage of the non-inverting input terminal (+). Therefore, the voltage of one node (Nx, 11) of the parasitic capacitance (Cp, 11) connected to the inverting input terminal (-) and the same node (Nx, 11) is the same as the voltage signal (Vdp).

At this time, when the voltage signal Vdp is applied to the other node n2 of the parasitic capacitance Cp, the potential difference across the parasitic capacitance Cp becomes 0, so that the parasitic capacitances Cp, 11), and therefore can operate as if the parasitic capacitance Cp, 11 does not exist.

The other node n2 of the parasitic capacitance Cp 11 may be connected to the data lines DL1 and DL2 and the gate lines GL1 and GL2 in FIG. Therefore, the switches SW1-1, SW1-2, SW1-3, and SW1-3 are turned on so that the voltage signal Vdp may be provided to the data lines DL1 and DL2 and the gate lines GL1 and GL2, respectively, SW1-4) can be installed. In the other time periods, the switches SW1-1, SW1-2, SW1-3 and SW1-4 supply the data lines DL1 and DL2 and the gate lines GL1 and GL2, respectively, To the signal sources S_DL1, S_DL2, S_GL1, and S_GL2. At this time, the DC voltage DC1 may be superimposed on the voltage signal Vdp at the terminal b of the switch SW1-1 and the terminal b of the switch SW1-2 may be supplied with The DC voltage DC2 may be superimposed on the voltage signal Vdp and the DC voltage DC3 may be superimposed on the voltage signal Vdp at the terminal b of the switch SW1-3, The DC voltage DC4 may be superimposed on the voltage signal Vdp at the terminal b of the switch SW1-4. At this time, at least some of the DC voltage DC1, the DC voltage DC2, the DC voltage DC3, and the DC voltage DC4 may be different values, or they may all be the same value, Value. Even if a DC voltage is applied to the voltage signal Vdp provided to the terminal b of the switches SW1-1, SW1-2, SW1-3, and SW1-4, the voltage across the parasitic capacitance Cp, 11 does not change with time , There is no current flowing through the parasitic capacitance Cp, 11, and therefore, it can operate as if the parasitic capacitance Cp, 11 does not exist.

The switch SW1 may also be connected to the VCOM 11. By the switch SW1, VCOM, 11 can be put into a floating state in a time period in which touch input is sensed. In the other time periods, not only the VCOM 11 but all the VCOM electrodes can be connected to the predetermined reference potential Vref2.

In FIGS. 5A and 5C, reference numeral 10 may be referred to as a 'touch sensing signal output unit'.

6A shows a configuration of a touch input sensing circuit provided according to an embodiment of the present invention.

Comparing FIGS. 6A and 5C, each common electrode 1037 shown in FIG. 6A corresponds to VCOM, 11 in FIG. 5C. The MUXs M1 to M9 shown in FIG. 6A are disposed between the VCOM 11 and the touch sense signal output unit 10 of FIG. 5C. In Fig. 6A, the switch SW1, the data line, and the gate line shown in Fig. 5C are not shown for convenience.

In the example shown in FIG. 6A, a total of 36 (= 6 * 6) common electrodes are provided. Each common electrode is electrically separated from each other and can be connected to the DDI chip 2 through a wiring 2037, respectively. The DDI chip 2 may include the timing controller 1101, the data driver 1102, and the gate driver 1103 shown in FIG. The size of the gap between each common electrode 1037 shown in Fig. 6A is exaggerated for convenience of explanation.

The DDI chip 2 may include one or more MUXs (M1 to M9). Each MUX may select one or more of a set of common electrodes consisting of a plurality of common electrodes 1037 that are adjacent to each other and may be connected to the touch sense signal output unit 10. For example, the MUX M1 is configured to select one or a plurality of common electrodes A1, B1, C1, and D1 adjacent to each other. In FIG. 6A, the index of the MUX is denoted by Mk (where k = 1, 2, 3, ... 9), and indices of 36 common electrodes are Ak, Bk, Ck and Dk , 3, ..., 9). At this time, the MUX Mk is configured to select one or a plurality of the common electrodes Ak, Bk, Ck, and Dk (where k = 1, 2, 3, ..., or 9). Since there are four common electrodes connected to each MUX (Mk), a total of 36 common electrodes can be divided into four groups in total. In FIG. 6A, the four groups are group A, group B, group C, and group D, and each group includes nine common electrodes. Wherein the group A includes common electrodes A1 to A9, the group B includes common electrodes B1 to B9, the group C includes common electrodes C1 to C9, And common electrodes D1 to D9. A specific method by which each MUX selects a common electrode will be described later with reference to FIGS. 8A to 8D, and FIGS. 9 and 10. FIG.

The touch sensing signal output unit 10 outputs whether or not the touch input is made at the common electrode 1037 connected through the MUX. Further, the touch sensing signal output unit 10 outputs a value related to the input intensity when touch input is performed. The output values (1 & cir &) of the plurality of touch sensing signal output units 10 may be provided to the touch IC 3. The touch IC 3 can determine touch coordinates by calculating which part of the plurality of common electrodes is touch input based on the output values (1). The host computer 1120 receives the touch coordinates from the touch IC 3 and can execute an application corresponding to the touch coordinates.

6B shows the connection relationship of another multiplexer 555 or switch 555 not shown in FIG. 6A.

6A, although the common electrode 1037 is illustrated as being directly connected to the MUXs M1 to M9, in practice, the common electrode 1037 is connected to the MUXs M1 to M9 via another multiplexer or switch 555 . The other multiplexer or switch 555 may be configured such that the common electrode 1037 is connected to the MUXs M1 to M9 during the touch input sensing period and the common electrode 1037 is connected to the reference potential Vref2 May be connected.

FIG. 7A is an example of an internal structure showing the function of the MUX shown in FIG. 6A. In the structure according to FIG. 7A, each MUX can select any one of the four inputs IN1 to IN4 and connect them to the output OUT. For this purpose, a 2-bit input selector (Sel-2 bit) may be provided.

FIG. 7B is another example of the internal structure showing the function of the MUX shown in FIG. 6A. In the structure according to FIG. 7B, each MUX can select one or more of the four inputs IN1 to IN4 and connect them to the output OUT. Thus, more than one input can be connected to the output at the same time. For this purpose, a 4-bit input selector (Sel-4bit) may be provided.

8A is a timing chart for explaining a method of driving the touch input sensing circuit according to an embodiment of the present invention.

In the example of FIG. 8A, the screen output through the input / output panel 1050 is updated at a frequency of 60 Hz. At this time, the screen update period T is given as 16.7 ms (= 1 / 60Hz). It is assumed that the time required to complete the screen output corresponding to one cycle is maximum 8.7 ms. This time period of 8.7 ms can be referred to as a screen update time interval 53 hereinafter. The time interval of 8 ms, which is the remaining period of the screen update period, can be referred to as a touch input sensing time interval 52 hereinafter.

The screen update interval 53 needs to control not only the signals applied to the gate lines and the data lines but also controls the plurality of common electrodes to have predetermined potentials.

In the touch input sensing time interval 52, the plurality of common electrodes are separated from the circuit unit providing the predetermined potential, and the common electrodes are connected to the touch sensing signal output unit 10 through the MUX, It can be utilized as a device for sensing.

That is, the signal TOUCH_EN may have a low value in the screen updating time interval 53 and a high value in the touch input sensing time interval 52.

8A, the touch input sensing time interval 52 is divided into A-time interval 52A, B-time interval 52B, C-time interval 52C, and D- And a time zone 52D.

At this time, the MUXs M1 to M9 are configured to select the common electrodes A1 to A9 belonging to the group A in the A-time interval 52A and the common electrodes A1 to A9 belonging to the group B in the B- The common electrodes C1 to C9 belonging to the group C are selected to select the common electrodes B1 to B9 and the common electrodes B1 to B9 are selected to select the common electrodes C1 to C9 in the C- The common electrodes D1 to D9 belonging to D are selected.

Accordingly, it is possible to determine whether or not the touch input is made to the common electrodes belonging to the group A in the A-time interval 52A. In the B-time interval 52B, the touch inputs to the common electrodes belonging to the group B And it is possible to determine whether touch input has been made to the common electrodes belonging to the group C in the C-time interval 52C, and whether or not the group D It is possible to determine whether or not the touch input has been performed on the common electrodes belonging to the second group.

8B is a modification of the driving method of the touch input sensing circuit according to FIG. 8A.

In the example of FIG. 8B, the screen output through the input / output panel 1050 is updated at a frequency of 60 Hz.

In the embodiment of FIG. 8B, the touch input sensing interval 52 is divided into A-interval 1 (152A), B-interval 1 (152B), C-interval 1 152C), D- time zone_1 (152D), A- time zone_2 (252A), B- time zone_2 252B, C- time zone_2 252C, 252D).

At this time, the MUXs M1 to M9 are configured to select the common electrodes A1 to A9 belonging to the group A in the A-time interval_1 152A and the A-time interval_2 252A, - B1 to B9 belonging to the group B are selected in the time interval 1 (152B) and the B-time interval 2 (252B), and the C-time interval 1 (152C) and the C- And the common electrodes C1 to C9 belonging to the group C are selected in the first group 252C and the second group 252D in the second group 252C. To select the common electrodes D1 to D9 to which they belong.

FIG. 8C is a modification of the driving method of the touch input sensing circuit according to FIG. 8A.

In the example of FIG. 8C, the screen output through the input / output panel 1050 is updated at a frequency of 120 Hz. At this time, the screen update period is given as 8.3 ms (= 1/120 Hz), and it is assumed that the time required to complete the screen output corresponding to one cycle is maximum 4.3 ms.

In the embodiment of FIG. 8C, the touch input sensing time interval 52 is divided into A-time interval 52A, B-time interval 52B, C-time interval 52C and D- And a time zone 52D. The embodiment of FIG. 8C can operate in the same manner as FIG. 8A, in accordance with this condition.

FIG. 8D is a modification of the driving method of the touch input sensing circuit according to FIG. 8C.

In the example of FIG. 8D, the screen output through the input / output panel 1050 is updated at a frequency of 120 Hz, as in FIG. 8C.

However, the screen update time interval is made up of the first screen update time interval 531 and the second screen update time interval 532 separated by a predetermined time therefrom. The first screen update time interval 531 and the second screen update time interval 532 may each have a duration of 2.15 ms.

The touch input sensing time interval is made up of a first touch input sensing time interval 521 and a second touch input sensing time interval 522 separated by a predetermined time therefrom. The first touch input sensing time interval 521 and the second touch input sensing time interval 522 may each have a duration of 2 ms.

In the embodiment of FIG. 8D, the first touch input sensing time interval 521 can be divided into A-time interval 52A and B-time interval 52B, each having a duration of 1 ms, The time domain 522 can be divided into a C-time domain 52C and a D-time domain 52D each having a duration of 1 ms.

At this time, the MUXs M1 to M9 are configured to select the common electrodes A1 to A9 belonging to the group A in the A-time interval 52A and the common electrodes A1 to A9 belonging to the group B in the B- The common electrodes C1 to C9 belonging to the group C are selected to select the common electrodes B1 to B9 and the common electrodes B1 to B9 are selected to select the common electrodes C1 to C9 in the C- The common electrodes D1 to D9 belonging to D are selected.

To implement the embodiment of FIGS. 8A-8D, the MUX may have the structure, for example, as shown in FIG. 7A or FIG. 7B.

FIG. 9A is a timing chart for explaining an operation method of the touch input sensing circuit according to FIG. 2 during a touch input sensing wait time according to an embodiment of the present invention.

The touch input may not be performed for a long time. In such a situation, if the touch input is detected in the same manner as described with reference to Figs. 8A to 8D, there is a problem that the standby power is much consumed. Accordingly, if it is determined that the touch input has not been performed for a long time, the touch input detection standby mode can be switched to the touch input detection mode as shown in FIG. 9A.

9A shows an example in which the screen output through the input / output panel 1050 is updated at a frequency of 60 Hz.

At this time, the MUXs (M1 to M9) are respectively connected to the group A, the group B, the group C, and the group (s) connected to the input terminal of the touch input sensing time interval 52 during a time interval 152A All the common electrodes belonging to D can be connected to their output terminals at the same time. To perform the method according to FIG. 9A, the MUXs of FIG. 6A may have the structure, for example, as shown in FIG. 7B. For example, as shown in FIG. 9B, the MUX M1 of FIG. 6A can connect VCOM, 11, VCOM, 12, VCOM, 21, VCOM, and 22 to the touch sensing signal output unit 10 at a time.

10 is a diagram for explaining a method of detecting whether a touch input event has occurred on a specific VCOM electrode according to another embodiment of the present invention.

10 shows an example in which the screen output through the input / output panel 1050 is updated at a frequency of 60 Hz. To implement the method according to FIG. 10, the MUXs of FIG. 6A may have the structure, for example, as shown in FIG. 7B.

10, the touch input sensing time interval 52 is divided into A-time interval 52A, B-time interval 52B, C-time interval 52C, and D- And a time zone 52D. The MUX in FIG. 6A outputs the VCOM electrodes 11 (ex: VCOM, 11) belonging to the group A during the A- time interval 52A, the B time interval 52B, and the C time interval 52C, And outputs the VCOM electrodes (ex: VCOM, 12) belonging to the group B to the output unit 10 while touching them during the A-time interval 52A, the B- time interval 52B and the D- time interval 52D And outputs the VCOM electrodes 21 (ex: VCOM, 21) belonging to the group C to the signal output section 10 during a touch of the A- time interval 52A, the C time interval 52C, and the D time interval 52D The VCOM electrodes 22 belonging to the group D are connected to the detection signal output unit 10 while the VCOM electrodes 22 and 22 are connected to the sensing signal output unit 10 during the B- time period 52B, the C- time period 52C and the D time period 52D To the touch sensing signal output unit 10.

Immediately before the start of the A-time interval 52A, immediately before the start of the B- time interval 52B, just before the start of the C- time interval 52C, and just before the start of the D- time interval 52D, (10) can be reset. The result of sampling the output voltage Vo of the touch sensing signal output unit 10 after operating the touch sensing signal output unit 10 during the A-time interval 52A can be denoted as y [0]. A result obtained by sampling the output voltage Vo of the touch sensing signal output unit 10 after operating the touch sensing signal output unit 10 during the B-th time interval 52B may be represented as y [1]. The result of sampling the output voltage Vo of the touch sensing signal output unit 10 after operating the touch sensing signal output unit 10 during the C-time interval 52C may be represented as y [2]. The result of sampling the output voltage Vo of the touch sensing signal output unit 10 after operating the touch sensing signal output unit 10 during the D-time interval 52A can be denoted as y [3].

In this case, y [0], y [1], y [2], y [3]

[Equation]

y [0] = A + B + C

y [1] = A + B + D

y [2] = A + C + D

y [3] = B + C + D

A represents the output value of the touch sensing signal output unit 10 when only the VCOM electrode (ex: VCOM, 11) belonging to the group A is connected to the touch sensing signal output unit 10 through the MUX alone. And B represents the output value of the touch sensing signal output unit 10 when only the VCOM electrode ex (VCOM) 12 belonging to the group B is connected to the touch sensing signal output unit 10 through the MUX alone. And C represents the output value of the touch sensing signal output unit 10 when only the VCOM electrode (ex: VCOM, 21) belonging to the group C is connected to the touch sensing signal output unit 10 through the MUX alone. And D represents the output value of the touch sensing signal output unit 10 when only the VCOM electrode (ex: VCOM) 22 belonging to the group D is connected to the touch sensing signal output unit 10 through the MUX alone.

At the end of the touch input sensing interval 52, a value S obtained by adding y [0], y [1], y [2], and y [3] S has the following relationship with A, B, C, and D as follows.

3 = (A + B + C + D) + y [2] + y [

Therefore, A, B, C, and D can be obtained by the following equations. In the following expression, S, y [0], y [1], y [2], and y [3] are values obtained by measuring using the touch sensing signal output unit 10.

A = (S-3 * y [3]) / 3,

B = (S-3 * y [2]) / 3,

C = (S-3 * y [1]) / 3,

D = (S-3 * y [0]) / 3.

Using the method according to FIG. 10, the time to measure one specific VCOM is increased compared with the method according to the embodiment described with reference to FIG. 8A, for example, so that the SNR can be increased.

Hereinafter, a method of calculating touch input information according to an embodiment of the present invention will be described with reference to FIG.

The method comprises: first information comprising a definition of p time points (T_v); (TEC_v) consisting of N_v number of sensing electrodes selected from a plurality of (= M) sensing electrodes, corresponding to each of the p time periods T_v, And calculating information on a touch input to any one of the plurality of sensing electrodes. However, v is an integer of 1 to p, and p is an integer of 2 or more. In one embodiment, N_1 through N_p may all be the same value.

For example, in the example of FIG. 10, p = 4, T_1 = 52A, T_2 = 52B, T_3 = 52C, T_4 = 52D, M = 4, N_1 = 3, N_2 = 3, N_3 = 3, N_4 = A, B, C}, TEC_2 = {A, B, D}, TEC_3 = {A, C, D}, and TEC_4 = {B, C, D}.

At this time, the different sensing electrode combinations belonging to the p sensing electrode combinations are composed of different combinations of sensing electrodes. That is, TEC_1 = {A, B, C}, TEC_2 = {A, B, D}, TEC_3 = {A, C, D} and TEC_4 = {B, C, D} are all different combinations.

The method includes the step of connecting all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v to an input terminal of an arbitrary touch sensing circuit to obtain an output value TO_v from the arbitrary touch sensing circuit .

That is, in the example of FIG. 10, all the sensing electrodes {A, B, C} belonging to the sensing electrode combination TEC_1 during the time period T_1 are connected together to the input terminals of the arbitrary first touch sensing circuit 10 . And obtain the output (TO_1 = y [0]) of the arbitrary first touch sensing circuit 10 during the time period T_1.

And all of the sensing electrodes {A, B, D} belonging to the sensing electrode combination TEC_2 during the time period T_2 may be connected together to the input terminals of the arbitrary second touch sensing circuit 10. And the output (TO_2 = y [1]) of the arbitrary second touch sensing circuit 10 during the time period T_2.

All of the sensing electrodes {A, C, D} belonging to the sensing electrode combination TEC_3 during the time period T_3 may be connected together to the input terminals of any third touch sensing circuit 10. And the output (TO_3 = y [2]) of the arbitrary third touch sensing circuit 10 during the time period T_3.

And all the sensing electrodes {B, C, D} belonging to the sensing electrode combination TEC_4 during the time period T_4 may be connected together to the input terminals of any fourth touch sensing circuit 10. [ And obtain the output (TO_4 = y [3]) of the arbitrary third touch sensing circuit 10 during the time period T_4.

The method may further include calculating information on a touch input to one of the plurality of sensing electrodes using the p output values TO_v.

In other words, in the example of FIG. 10, a voltage is applied to one of the plurality of sensing electrodes belonging to the plurality of sensing electrodes by using p = 4 output values y [0], y [1], y [ It is possible to calculate information about the touch input.

At this time, the plurality of sensing electrodes may be arranged in a matrix form. Or may be zigzag arranged in a honeycomb structure.

At this time, the plurality of sensing electrodes may be provided as a module separated from the display panel and disposed on the display panel. At this time, the display panel may be any one of a TFT panel and an IPS panel, but is not limited to a specific type.

The plurality of sensing electrodes may be a plurality of separate common electrodes used as a component of the display panel for operation of the display panel. At this time, the plurality of sensing electrodes (= common electrodes) may be connected to the input terminals of one or more touch input sensing circuits allocated in a predetermined manner during the p number of time periods T_v.

The plurality of sensing electrodes may be connected to a predetermined reference potential Vref2 for at least a part of the time other than the p time points T_v.

The plurality of sensing electrodes may be adjacent to each other. That is, when the first sensing electrode among the plurality of sensing electrodes is arbitrarily selected, at least one of the plurality of sensing electrodes other than the first sensing electrode is adjacent to the first sensing electrode .

Alternatively, a minimum distance between the first sensing electrode of the plurality of sensing electrodes and the second sensing electrode of the plurality of sensing electrodes is referred to as a first minimum distance, and a predetermined one of the sensing electrodes other than the plurality of sensing electrodes The first minimum distance may be greater than the second minimum distance, when the minimum distance between the sensing electrode and the first sensing electrode is a second minimum distance.

Alternatively, the first sensing electrode of the plurality of sensing electrodes may not be adjacent to any of the plurality of sensing electrodes other than the first sensing electrode. That is, all of the sensing electrodes adjacent to the first sensing electrode may not be included in the plurality of sensing electrodes.

The touch sensing circuit TSC_a and the touch sensing circuit TSC_b are connected to the touch sensing circuit TSC_v when the arbitrary touch sensing circuit connected to all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v is represented as TSC_v (Where a and b are different values, and a and b are integers from 1 to p, respectively).

Alternatively, when the touch sensing circuit TSC_a and the touch sensing circuit TSC_b are connected to all the touch sensing circuits connected to all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v, (Where a and b are different values, and a and b are integers from 1 to p, respectively).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the essential characteristics thereof. The contents of each claim in the claims may be combined with other claims without departing from the scope of the claims.

Claims (21)

A method for detecting a touch input using a touch sensing device for connecting N1 sensing electrodes selected among M sensing electrodes or N2 sensing electrodes selected from among M sensing electrodes to an input terminal of a sensing circuit using one or more MUXs,
A first step of acquiring a first output value from the sensing circuit by connecting the N1 sensing electrodes selected from the M sensing electrodes to the input terminal of the sensing circuit during a first time period;
A second step of connecting the N2 sensing electrodes selected from the M sensing electrodes to the input terminal of the sensing circuit during a second time period to obtain a second output value from the sensing circuit;
And a third step of calculating information about a touch input to one of the M sensing electrodes using the first output value and the second output value,
The N1 sensing electrodes and the N2 sensing electrodes are alternately arranged and distributed,
Wherein when the touch sensing device is in the standby mode, the touch sensing device detects the touch input through the first to third steps when the touch sensing device is in the normal mode, And the N2 sensing electrodes are connected to the input terminal of the sensing circuit. In the standby mode, the N1 sensing electrodes and the N2 sensing electrodes, which are connected by the MUX, And the consumption of standby power is reduced. first information comprising a definition of p time points (T_v); Using the second information including the definition of the sense electrode combination (TEC_v) defined corresponding to each of the p time periods (T_v) and composed of N_v number of sense electrodes selected from the plurality of sense electrodes, (Where p is an integer of 2 or more and v is an integer of 1 to p) to a sensing electrode of any one of the sensing electrodes,
(a) the different sensing electrode combinations belonging to the p sensing electrode combinations are composed of different combinations of sensing electrodes,
(b) connecting all the sensing electrodes belonging to the sensing electrode combination (TEC_v) to the input terminals of any touch sensing circuit during the time period (T_v) to obtain an output value (TO_v) from the arbitrary touch sensing circuit; And
(c) calculating information on a touch input to one of the plurality of sensing electrodes by using p output values TO_v,
The sensing electrodes of the different sensing electrode combinations belonging to the p sensing electrode combinations are alternately arranged and distributed,
One or more MUXs that can select one or all of the sensing electrodes of the adjacent sensing electrode combinations to be connected to the touch sensing circuit,
The touch input is detected through the steps of (a) to (c) when in the normal mode, and when the touch input is in the standby mode, the sensing electrodes of the different sensing electrode combinations connected to the one MUX are connected, Wherein the touch input information is used as a sensing electrode to reduce the consumption of standby power. The method of claim 2, wherein the plurality of sensing electrodes are p, the p is an integer of 3 or more, the N_v satisfies N_v = p-1, and the N_v is an integer of 2 or more. The method of claim 2 or 3, wherein the plurality of sensing electrodes are arranged in a matrix form. The touch input information calculation method according to claim 2 or 3, wherein the plurality of sensing electrodes are provided separately from the display panel and are disposed on the display panel. 6. The method of claim 5, wherein the display panel is one of a TFT panel and an IPS panel. The method of claim 2 or 3, wherein the plurality of sensing electrodes are a plurality of separate common electrodes used as a component of the display panel for operation of the display panel. 7. The method of claim 6, wherein the plurality of sensing electrodes are connected to input terminals of one or more touch input sensing circuits allocated in a predetermined manner during the p number of time periods T_v. The method according to claim 6, wherein the plurality of sensing electrodes are connected to a predetermined reference potential (Vref2) during at least a part of the time other than the p time periods (T_v). The method of claim 2 or 3, wherein the plurality of sensing electrodes are adjacent to each other. 3. The method of claim 2, wherein N_v is a constant independent of the v value. The method according to claim 2 or 3,
Wherein the first sensing electrode of the plurality of sensing electrodes comprises:
Wherein the sensing electrode is not adjacent to any of the plurality of sensing electrodes except the first sensing electrode,
Wherein all of the sensing electrodes adjacent to the first sensing electrode are not included in the plurality of sensing electrodes.
Method of calculating touch input information. The method according to claim 2 or 3,
When the arbitrary touch sensing circuit connected to all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v is denoted as TSC_v,
Wherein the touch sensing circuit TSC_a and the touch sensing circuit TSC_b are the same touch sensing circuit (note that a and b are different values, and a and b are integers from 1 to p, respectively)
Method of calculating touch input information. The method according to claim 2 or 3,
When the arbitrary touch sensing circuit connected to all the sensing electrodes belonging to the sensing electrode combination TEC_v during the time period T_v is denoted as TSC_v,
Wherein the touch sensing circuit TSC_a and the touch sensing circuit TSC_b are different touch sensing circuits wherein a and b are different values and a and b are integers from 1 to p,
Method of calculating touch input information. A plurality of sensing electrodes;
One or more touch sensing circuits; And
And a processing unit,
Wherein the processing unit comprises: first information including a definition of p time points (T_v); Using the second information including the definition of the sense electrode combination (TEC_v) defined corresponding to each of the p time periods (T_v) and composed of N_v number of sense electrodes selected from the plurality of sense electrodes, (Where p is an integer of 2 or more and v is an integer of 1 to p) to calculate the information about the touch input to any one of the sensing electrodes,
The different combinations of sensing electrodes belonging to the p sensing electrode combinations are composed of different combinations of sensing electrodes,
The sensing electrodes of the different sensing electrode combinations belonging to the p sensing electrode combinations are alternately arranged and distributed,
Wherein the processing unit includes one or more MUXs capable of selecting one or all of the sensing electrodes of the adjacent sensing electrode combinations to be connected to the touch sensing circuit,
In the normal mode,
Acquiring an output value TO_v from the arbitrary touch sensing circuit by connecting all the sensing electrodes belonging to the sensing electrode combination TEC_v to the input terminals of any touch sensing circuits during the time period T_v; And
calculating information on a touch input to one of the plurality of sensing electrodes by using p output values TO_v,
In the standby mode,
And the sensing electrodes of the different sensing electrode combinations connected to the one MUX are connected and used as one sensing electrode to reduce the standby power consumption. The touch input sensing apparatus according to claim 15, wherein the plurality of sensing electrodes are p, the p is an integer of 3 or more, N_v satisfies N_v = p-1, and N_v is an integer of 2 or more. 17. The touch input sensing device of claim 15 or 16, wherein the plurality of sensing electrodes are arranged in a matrix. 17. The touch input sensing device of claim 15 or 16, wherein the plurality of sensing electrodes are a plurality of separate common electrodes used as a component of the display panel for operation of the display panel. 17. The method according to claim 15 or 16,
Wherein the plurality of sensing electrodes are connected to the input terminals of the one or more touch sensing circuits allocated in a predetermined manner during the p number of time periods T_v,
Wherein the plurality of sensing electrodes are connected to a predetermined reference potential (Vref2) during at least a part of the time other than the p time points (T_v)
Touch input sensing device.
first information comprising a definition of p time points (T_v); Using the second information including the definition of the sense electrode combination (TEC_v) defined corresponding to each of the p time periods (T_v) and composed of N_v number of sense electrodes selected from a plurality of all sense electrodes, (Where p is an integer of 3 or more and v is an integer of 1 to p) to the touch electrode of any of the four sensing electrodes,
The different combinations of sensing electrodes belonging to the p sensing electrode combinations are composed of different combinations of sensing electrodes,
During the time period T_v, the sensing electrodes belonging to at least two sensing electrode combinations other than the sensing electrode combination TEC_v among the plurality of sensing electrodes are connected together to the input terminals of the arbitrary touch sensing circuit, Obtaining an output value TO_v from the circuit; And
and calculating information on a touch input to any one of the plurality of sensing electrodes by using p output values TO_v. A plurality of whole sensing electrodes;
One or more touch sensing circuits; And
And a processing unit,
Wherein the processing unit comprises: first information including a definition of p time points (T_v); Using second information including a definition of a sensing electrode combination (TEC_v) defined corresponding to each of the p time periods (T_v) and composed of N_v number of sensing electrodes selected from the plurality of total sensing electrodes, (Where p is an integer of 3 or more and v is an integer of 1 to p) to calculate the information on the touch input to any one of the plurality of sensing electrodes,
The different combinations of sensing electrodes belonging to the p sensing electrode combinations are composed of different combinations of sensing electrodes,
Wherein,
During the time period T_v, the sensing electrodes belonging to at least two sensing electrode combinations other than the sensing electrode combination TEC_v among the plurality of sensing electrodes are connected together to the input terminals of the arbitrary touch sensing circuit, Obtaining an output value TO_v from the circuit; And
and calculating information on a touch input to one of the plurality of sensing electrodes by using p output values TO_v.

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