Position detection device and position detection method

Abstract

To provide a position detection device which allows the electromagnetic induction method and the capacitive coupling method to share an entire area of a sensor.SOLUTION: A position detection device is provided, comprising a plurality of first loop electrodes arranged in a first direction without overlapping each other, a plurality of second loop electrodes arranged in a second direction intersecting the first direction without overlapping each other, and a first detection circuit configured to simultaneously select multiple adjacent first loop electrodes from among the plurality of first loop electrodes when in electromagnetic inductive coupling with an indicator to detect a position indicated by the pointer.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a position detection device capable of detecting an indication position by an indicator using electromagnetic induction coupling and detecting an indication position by an indicator using electrostatic coupling using a common position detection sensor.

Background Art

[0002] There is known a position detection device that uses an electrostatic coupling type position detection sensor to detect an indication position by a stylus (electronic pen) compatible with the electrostatic coupling method and to detect a human finger touch position. However, in the case of this position detection device, when the human body such as a hand touches the position detection sensor surface during detection of the indication position by the stylus, there is a problem that it becomes difficult to accurately detect the indication position by the stylus.

[0003] In this regard, if the indication position by the stylus is detected by an electromagnetic induction type position detection sensor and the detection of the human finger touch position is performed by an electrostatic coupling type position detection sensor, the above problem can be solved.

[0004] However, if an electromagnetic induction type position detection sensor and an electrostatic coupling type position detection sensor are separately provided in the position detection device, there is a problem that the configuration becomes complicated.

[0005] Therefore, in order to solve this problem, Patent Document 1 (Japanese Patent No. 5702511) and Patent Document 2 (Japanese Patent No. 5819565) propose a position detection device that realizes position detection by an electromagnetic induction method and position detection by an electrostatic coupling method using one common position detection sensor.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, the position detection sensor of the position detection device proposed in Patent Document 1 is provided with a plurality of linear conductors (X-axis conductors and Y-axis conductors) extending in directions orthogonal to each other on the front and back surfaces of the substrate, and switch circuits are provided at one end side and the other end side of the X-axis conductors and the Y-axis conductors, respectively, to form a loop coil for electromagnetic induction coupling and to switch the loop coil, or to switch the X-axis conductors and the Y-axis conductors for electrostatic coupling applications. For this reason, there has been a problem that the configuration becomes complicated.

[0008] Further, in the position detection sensor of the position detection device proposed in Patent Document 2, a plurality of linear conductors (X-axis conductors and Y-axis conductors) extending in directions orthogonal to each other are provided on the front and back surfaces of the substrate, and each of the plurality of X-axis conductors and the plurality of Y-axis conductors is configured to be divided into those used in an electromagnetic induction method and those used in an electrostatic coupling method. For this reason, in the position detection sensor, an area that can be detected by the electromagnetic induction method and an area that can be detected by the electrostatic coupling method are separated from each other, and there has been a problem that the entire area of the position detection sensor cannot be shared by the electromagnetic induction method and the electrostatic coupling method.

[0009] An object of the present invention is to provide a position detection device capable of solving the above problems.

MEANS FOR SOLVING THE PROBLEM

[0010] To solve the above problems, a plurality of first electrodes arranged in a first direction A position detection device that simultaneously selects a plurality of the first electrodes adjacent to each other and detects an indication position by an indicator , A detection circuit having a first common terminal and a second common terminal connected to a part of the plurality of first electrodes, wherein when in a state of electromagnetic induction coupling with an indicator, first terminals of the plurality of first electrodes adjacent to each other are connected to the first common terminal, and second terminals of the plurality of first electrodes adjacent to each other are connected to the second common terminal; An amplifier circuit connected to the first common terminal and the second common terminal of the detection circuit, and obtaining an output corresponding to an induced current flowing due to electromagnetic induction coupling with the indicator in the plurality of first electrodes adjacent to each other; A position detection device characterized by comprising the above.

[0011] The position detection device having the above configuration is A plurality of first electrode From among them, a plurality of first electrode Adjacent to each other are simultaneously selected to detect the indication position by the indicator. Thereby finger The indicator can be detected efficiently.

Brief Description of the Drawings

[0012]

Figure 1

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[0013] [First Embodiment] FIG. 1 is a diagram showing a configuration example of a position detection device 1 according to a first embodiment of the present invention. In the position detection device 1 of this embodiment, it is possible to use an electronic pen (stylus) as an example of a first indicator and a human finger as an example of a second indicator, and the coordinates (X, Y) of the indicated position by each indicator can be detected whenever the position is indicated by any of the indicators.

[0014] In the position detection device of this first embodiment, the electronic pen 2, which is a first indicator of the detection target, has a coil 202 wound around a magnetic core 201 and is configured to transmit a signal from a signal generation circuit 203 to the position detection device 1 as electromagnetic induction energy through the coil 202, as shown in FIG. 2, in the example described below. Note that the electronic pen 2 includes a battery (not shown) for driving the signal generation circuit 203.

[0015] As shown in FIG. 1, the position detection device 1 of this embodiment includes a position detection sensor 10 and a signal processing circuit 20 connected to the position detection sensor 10. In this example, the position detection sensor 10 is configured as a transparent sensor disposed on the display screen of a display device such as a liquid crystal display.

[0016] That is, in the position detection sensor 10 of this example, when the lateral direction of a transparent substrate 11 such as a rectangular glass substrate is defined as the X-axis direction (an example of the first direction), the longitudinal direction orthogonal to the lateral direction of the transparent substrate 11 is defined as the Y-axis direction (an example of the second direction). A plurality of loop electrode groups are formed on the transparent substrate 11 at regular intervals by metal mesh electrodes combining ITO (Indium Tin Oxide) or thin wires of silver, copper, etc., such that the elongated loop electrodes do not overlap each other.

[0017] The loop electrode group has, for example, a two-layer structure including an X-loop electrode group 12 composed of a plurality of loop electrodes X as an example of the first electrode and a Y-loop electrode group 13 composed of a plurality of loop electrodes Y as an example of the second electrode. In this example, on the front surface side of the transparent substrate 11, a plurality of loop electrodes X with the Y-axis direction as the longitudinal direction of the elongated loop are arranged at regular intervals in the X-axis direction without overlapping each other, forming the X-loop electrode group 12. On the back surface side of the transparent substrate 11, a plurality of loop electrodes Y with the X-axis direction as the longitudinal direction of the elongated loop are arranged at regular intervals in the Y-axis direction without overlapping each other, forming the Y-loop electrode group 13. In this example, the X-loop electrode group 12 is composed of 40 loop electrodes X (X1 to X40), and the Y-loop electrode group 13 is composed of 30 loop electrodes Y (Y1 to Y30).

[0018] In the following description, when it is not necessary to distinguish each of the loop electrodes X1 to X40, only the loop electrode X will be described, and similarly, when it is not necessary to distinguish each of the loop electrodes Y1 to Y30, only the loop electrode Y will be described.

[0019] The array pitch of the loop electrode X and the loop electrode Y is preferably, for example, 3 to 6 mm, which corresponds to the size of the contact area when touching the position detection sensor 10 with a finger. And, in order to efficiently receive the signal from the electronic pen 2, it is better that the width of the loop coil is wider. Therefore, as shown in FIG. 1, the interval between adjacent ones of the loop electrode X and the loop electrode Y is preferably as narrow as possible. Thus, in this example, adjacent ones of the loop electrode X and the loop electrode Y are in a proximate state. Therefore, the width of the loop in the arrangement direction of each of the loop electrode X and the loop electrode Y is slightly smaller than the array pitch.

[0020] In this example, the signal processing circuit 20 connected to the position detection sensor 10 includes a selection circuit 21 for selecting one loop electrode X from among the X loop electrode group 12, a selection circuit 22 for selecting one loop electrode Y from among the Y loop electrode group 13, a mode switching circuit 23 that can be switched between the detection of the first indicator by electromagnetic induction coupling and the detection of the second indicator by electrostatic coupling, a pen signal reception circuit 24 that constitutes an example of a first detection circuit for detecting the indication position by the first indicator in electromagnetic induction coupling, a touch detection control circuit 25 that constitutes an example of a second detection circuit for detecting the indication position by the second indicator in electrostatic coupling, and a processing control circuit 26 composed of a computer.

[0021] The selection circuit 21 is composed of two multiplexers 211 and 212. The start ends (X1a to X40a) of the respective windings of the plurality of loop electrodes X (X1 to X40) are connected to one multiplexer 211, and the end ends (X1b to X40b) of the windings are each connected to the other multiplexer 212. Then, by the two multiplexers 211 and 212 being selectively controlled in conjunction with the selection control signal SEx from the processing control circuit 26, the loop electrode X is sequentially selected one by one from within the X loop electrode group 12 by the selection circuit 21.

[0022] Then, one start end of the loop electrodes X within the X-loop electrode group 12 selected by the selection control signal SEx is selected by the multiplexer 211 and connected to the common terminal XA of this multiplexer 211, and the end end of the same loop electrode X is selected by the multiplexer 212 and connected to the common terminal XB of this multiplexer 212.

[0023] Also, the selection circuit 22 is composed of two multiplexers 221 and 222. The start ends (Y1a to Y30a) of a plurality of loop electrodes Y (Y1 to Y30) are respectively connected to one multiplexer 221, and the end ends (Y1b to Y30b) are respectively connected to the other multiplexer 222. Then, the two multiplexers 221 and 222 are selectively controlled in conjunction with each other by the selection control signal SEy from the processing control circuit 26, so that one loop electrode Y is sequentially selected one by one from within the Y-loop electrode group 13 by the selection circuit 22.

[0024] Then, one start end of the loop electrode Y within the Y-loop electrode group 13 selected by the selection control signal SEy is selected by the multiplexer 221 and connected to the common terminal YA of this multiplexer 221, and the end end of the same loop electrode Y is selected by the multiplexer 222 and connected to the common terminal YB of this multiplexer 222.

[0025] The mode switching circuit 23 includes switching switch circuits 23XA and 23XB for the loop electrode X and switching switch circuits 23YA and 23YB for the loop electrode Y. The common terminal XA of the multiplexer 211 is connected to the movable terminal of the switching switch circuit 23XA of the mode switching circuit 23, and the common terminal XB of the multiplexer 212 is connected to the movable terminal of the switching switch circuit 23XB of the mode switching circuit 23. Also, the common terminal YA of the multiplexer 221 is connected to the movable terminal of the switching switch circuit 23YA of the mode switching circuit 23, and the common terminal YB of the multiplexer 222 is connected to the movable terminal of the switching switch circuit 23YB of the mode switching circuit 23.

[0026] One fixed terminal P of one of the switching switch circuits 23XA, 23XB, 23YA, and 23YB of the mode switching circuit 23 is connected to the pen signal receiving circuit 24, and the other fixed terminal F is connected to the touch detection control circuit 25.

[0027] One fixed terminal P of the switching switch circuit 23XA of the mode switching circuit 23 is connected to one input terminal (in the example of the figure, the inverting input terminal) of the X-side differential input amplifier 24X of the pen signal receiving circuit 24. Also, one fixed terminal P of the switching switch circuit 23XB is connected to the other input terminal (in the example of the figure, the non-inverting input terminal) of the X-side differential input amplifier 24X. Further, one fixed terminal P of the switching switch circuit 23YA of the mode switching circuit 23 is connected to one input terminal (in the example of the figure, the inverting input terminal) of the Y-side differential input amplifier 24Y of the pen signal receiving circuit 24. Also, one fixed terminal P of the switching switch circuit 23YB is connected to the other input terminal (in the example of the figure, the non-inverting input terminal) of the Y-side differential input amplifier 24Y.

[0028] Although not shown in the figure, an X-axis signal receiving circuit and a Y-axis signal receiving circuit are respectively provided at the subsequent stages of the X-side differential input amplifier 24X and the Y-side differential input amplifier 24Y of the pen signal receiving circuit 24. These X-axis signal receiving circuit and Y-axis signal receiving circuit detect the reception level of the pen signal (the signal received from the electronic pen 2) detected by the loop electrode X and the loop electrode Y, and supply the information on the detected reception level to the processing control circuit 26. The processing control circuit 26 detects the coordinates (X, Y) of the indicated position on the position detection sensor 10 by the electronic pen 2 from the information from the pen signal receiving circuit 24.

[0029] Also, in this example, the other fixed terminal F of the switching circuit 23XA and the other fixed terminal F of the switching circuit 23XB are connected to each other, and the connection point is connected to the input terminal of the touch signal detection amplifier 251 of the touch detection control circuit 25. Also, the other fixed terminal F of the switching circuit 23YA and the other fixed terminal F of the switching circuit 23YB are connected to each other, and the connection point is connected to the output terminal of the transmission output driver 252 of the touch detection control circuit 25. Therefore, since both ends of the loop electrode X and the loop electrode Y are short-circuited, they operate as one electrode wire each.

[0030] An oscillation circuit 253 is connected to the previous stage of the transmission output driver 252, and a frequency signal of a predetermined frequency f from this oscillation circuit 253 is transmitted to the position detection sensor 10 through the transmission output driver 252. Also, a touch detection circuit (not shown) is provided at the subsequent stage of the touch signal detection amplifier 251 of the touch detection control circuit 25 to detect the level of the signal transmitted to the position detection sensor 10 through the transmission output driver 252 and received through the position detection sensor 10, and supply information on the detected signal level to the processing control circuit 26.

[0031] The processing control circuit 26 detects the coordinates (X, Y) of the indicated position on the position detection sensor 10 by the finger, using the fact that the level of the signal from the touch detection control circuit 25 changes at the position indicated by the finger.

[0032] The processing control circuit 26 detects the coordinates of the indicated positions of the respective indicating bodies as described above based on the received information from the pen signal receiving circuit 24 and the touch detection control circuit 25, and supplies a timing control signal to the pen signal receiving circuit 24 and the touch detection control circuit 25.

[0033] Further, the processing control circuit 26 supplies the selection control signal SEx to the multiplexers 211 and 212 of the selection circuit 21 to control the sequential selection of one loop electrode X from among the X-loop electrode group 12, and supplies the selection control signal SEy to the multiplexers 221 and 222 of the selection circuit 22 to control the sequential selection of one loop electrode Y from among the Y-loop electrode group 13.

[0034] Furthermore, the processing control circuit 26 supplies a mode switching signal MD to the mode switching circuit 23 to switch the movable terminals of the switching switch circuits 23XA, 23XB, 23YA, and 23YB between the state of being connected to the fixed terminal P (electromagnetic induction mode) and the state of being connected to the fixed terminal F (electrostatic coupling mode).

[0035] In this embodiment, the processing control circuit 26 alternately switches the mode switching circuit 23 between the fixed terminal P side and the fixed terminal F side at predetermined time intervals by means of the mode switching signal MD, so that the position detection device 1 switches between the electromagnetic induction mode and the electrostatic coupling mode in a time-division manner.

[0036] [Operation of the position detection device 1 according to the first embodiment] In this embodiment, the processing control circuit 26, during a predetermined long period of time, uses the mode switching signal MD to connect the movable terminals of the switching switch circuits 23XA, 23XB, 23YA, and 23YB of the mode switching circuit 23 to the fixed terminal P, and drives the pen signal receiving circuit 24 to perform switching control to the electromagnetic induction mode. Then, during this period of the electromagnetic induction mode, the processing control circuit 26 controls the multiplexers 211 and 212 of the selection circuit 21 to sequentially select all of the loop electrodes X one by one from among the X-loop electrode group 12, and controls the multiplexers 221 and 222 of the selection circuit 22 to sequentially select all of the loop electrodes Y one by one from among the Y-loop electrode group 13.

[0037] Then, in the position detection device 1 in the electromagnetic induction mode state, as shown in FIG. 2, both ends of one loop electrode X selected by the selection circuit 21 are connected to the inverting input terminal and the non-inverting input terminal of the X-side differential input amplifier 24X of the pen signal receiving circuit 24. Similarly, both ends of the loop electrode Y selected by the selection circuit 22 are connected to the inverting input terminal and the non-inverting input terminal of the Y-side differential input amplifier 24Y of the pen signal receiving circuit 24.

[0038] At this time, when the position is indicated by the electronic pen 2 on the position detection sensor 10, the induction currents induced in the loop electrode X and the loop electrode Y in response to the signal from the electronic pen 2 are amplified by the X-side differential input amplifier 24X and the Y-side differential input amplifier 24Y, and supplied to the subsequent X-axis signal receiving circuit and Y-axis signal receiving circuit, and their levels are detected.

[0039] The processing control circuit 26 detects the coordinates (X, Y) of the indicated position on the position detection sensor by the electronic pen 2 as described above, based on the switching timing by the selection control signal SEx of the multiplexers 211 and 212 of the selection circuit 21 and the selection control signal SEy of the multiplexers 221 and 222 of the selection circuit 22, and the reception detection output of the signal sent from the electronic pen 2 from the pen signal receiving circuit 24.

[0040] When the period of the electromagnetic induction mode ends, in this embodiment, the processing control circuit 26 connects the movable terminals of the switching switch circuits 23XA, 23XB, 23YA, 23YB of the mode switching circuit 23 to the fixed terminal F by the mode switching signal MD, and drives the touch detection control circuit 25 to perform switching control to the electrostatic coupling mode. Then, even during the period of this electrostatic coupling mode, the processing control circuit 26 switches the selection circuit 21 and the selection circuit 22 by the selection control signal SEx and the selection control signal SEy, and controls to sequentially select each of the loop electrodes X one by one from the X loop electrode group 12, and also controls to sequentially select each of the loop electrodes Y one by one from the Y loop electrode group 13.

[0041] In the position detection device 1 in this electrostatic coupling mode, as shown in FIG. 3, the common terminal XA with the start end connected and the common terminal YA with the end connected are selected by the selection circuit 22 and connected to each other to act as one electrode line. A signal of a predetermined frequency from the oscillation circuit 253 is sequentially supplied to the loop electrode Y through the transmission output driver 252 of the touch detection control circuit 25. Further, the loop electrode X in which the common terminal YA with the start end connected and the common terminal YB with the end connected are selected by the selection circuit 21 and connected to each other to act as one electrode line is connected to the input end of the touch signal detection amplifier 251 of the touch detection control circuit 25.

[0042] At this time, the signal transmitted to the loop electrode Y short-circuited through the transmission output driver 252 is received by the short-circuited loop electrode X, and its reception level is supplied to the touch signal detection amplifier 251. However, when the finger 3 touches the position detection sensor 10, a part of the signal transmitted to the loop electrode Y flows through the finger 3 and the human body, so the signal transmitted from the loop electrode Y to the loop electrode X at the finger touch position decreases. The processing control circuit 26 detects the coordinates of the finger touch position by detecting the change in the reception signal level from the touch detection control circuit 25.

[0043] When the period of the electrostatic coupling mode ends, in this embodiment, the processing control circuit 26 switches to the electromagnetic induction mode as described above by the mode switching signal MD. Hereinafter, in the same manner, the electromagnetic induction mode and the electrostatic coupling mode are repeated in a time-sharing manner.

[0044] As described above, in the position detection device 1 of the first embodiment described above, the coordinates of the indicated position by the electronic pen 2 can be detected by the electromagnetic induction method and the coordinates of the indicated position by the finger 3 can be detected by the electrostatic coupling method using the position detection sensor 10 in which the X loop electrode group 12 and the Y loop electrode group 13 are formed.

[0045] And in the position detection device 1 of this first embodiment, since the X-loop electrode group 12 and the Y-loop electrode group 13 are formed in the position detection sensor 10 instead of linear electrodes, there is no need to connect the linear electrodes at the ends to form loop electrodes. For this reason, the position detection device 1 can have a simple configuration using a selection circuit 21 and a selection circuit 22 that respectively select each of the loop electrodes X from among the X-loop electrode group 12 and each of the loop electrodes Y from among the Y-loop electrode group 13, and a mode switching circuit 23.

[0046] [Second Embodiment] In the position detection device 1 of the above-described first embodiment, in the selection circuit 21 and the selection circuit 22, the loop electrodes X and the loop electrodes Y are sequentially selected one by one in both the electromagnetic induction mode and the electrostatic coupling mode. However, in the electromagnetic induction mode, by simultaneously selecting a plurality of adjacent ones from among the X-loop electrode group 12 and the Y-loop electrode group 13, a wide loop coil can be equivalently configured to more efficiently detect the signal from the electronic pen 2. The second embodiment described below is the case where it is configured in this way. In the following description, since the operation in the electrostatic coupling mode is the same as that in the first embodiment, the operation mainly for the electromagnetic induction mode will be described.

[0047] <First Example of the Second Embodiment> FIGS. 4 to 7 are diagrams for explaining a configuration example of a position detection device 1A of a second embodiment configured to simultaneously select two adjacent ones of the loop electrodes X and the loop electrodes Y respectively.

[0048] FIG. 4 is a diagram showing a configuration example of the position detection device 1A according to the second embodiment. In the position detection device 1A of this second embodiment, as shown in FIG. 4, instead of the selection circuits 21 and 22 in the position detection device 1 of the first embodiment, a selection circuit 21A and a selection circuit 22A are provided, and instead of the processing control circuit 26, a processing control circuit 26A is provided. Otherwise, the configuration is the same as that of the position detection device 1 of the first embodiment. In FIG. 4, the same parts as those of the position detection device 1 of the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

[0049] In this second embodiment, the selection circuit 21A is composed of a select switch 211A and a select switch 212A. As shown in FIG. 4, the select switch 211A and the select switch 212A are provided with switches corresponding to the number of loop electrodes X (X1 to X40). The start ends X1a to X40a of the respective loop electrodes X (X1 to X40) are each connected to one end of each switch of the select switch 211A, and the end ends X1b to X40b are each connected to one end of each switch of the select switch 212A.

[0050] Then, the other ends of the plurality of switches of the select switch 211A are commonly connected and connected to the common terminal XA' of the select switch 211A. Similarly, the other ends of the plurality of switches of the select switch 212A are commonly connected and connected to the common terminal XB' of the select switch 212A. The common terminal XA' of the select switch 211A is connected to the movable terminal of the changeover switch circuit 23XA of the mode changeover circuit 23, and the common terminal XB' of the select switch 212A is connected to the movable terminal of the changeover switch circuit 23XB of the mode changeover circuit 23.

[0051] Then, in the first example of the second embodiment, in the electromagnetic induction mode, the select switches 211A and 212A are controlled to select two adjacent loop electrodes X from among the X-loop electrode group 12 one by one in sequence while shifting them one by one, by the selection control signal SEMx from the process control circuit 26A.

[0052] FIG. 5 is a diagram for explaining the selection control of a plurality of switches of the select switches 211A and 212A in the electromagnetic induction mode in the position detection device 1A of the first example of the second embodiment. This FIG. 5 shows the on / off switching states of the switches to which each of the loop electrodes X1 to X40 of the X-loop electrode group 12 is connected in the select switches 211A and 212A in the order of the passage of time, where "1" means switch on and "0" means switch off. In the electromagnetic induction mode, the selection control shown in FIG. 5 is repeatedly performed by the selection control signals SEMx and SEMy.

[0053] That is, the select switch 211A and the select switch 212A of the selection circuit 21A sequentially select the same two adjacent loop electrodes X. First, the two switches to which the loop electrodes X1 and X2 are connected are turned on, and these loop electrodes X1 and X2 are connected to the common terminals XA' and XB'. Next, the two switches to which the loop electrodes X2 and X3 are connected are turned on, and these loop electrodes X2 and X3 are connected to the common terminals XA' and XB'. Further, while shifting the selected loop electrodes X one by one, such as loop electrodes X3 and X4, X4 and X5, X5 and X6, two loop electrodes X are connected to the common terminals XA' and XB'.

[0054] Since the common terminals XA' and XB' are connected to the X-side differential input amplifier 24X of the pen signal receiving circuit 24 through the fixed terminal P side of the mode switching circuit 23, the pen signal receiving circuit 24 detects the reception level of the pen signal for every two selected loop electrodes X.

[0055] When two adjacent loop electrodes X are selected simultaneously in this way, as shown in FIG. 6, the two coils are connected in parallel and supplied to the X-side differential input amplifier 24X. In this case, assuming that the currents induced by electromagnetic induction between the two adjacent loop electrodes Xn and Xn + 1 (where n = 1, 2, ···, 39) and the electronic pen 2 are i1 and i2 respectively, the X-side differential input amplifier 24X obtains an output α(i1 + i2) corresponding to the added value of the currents induced in these two loop electrodes Xn and Xn + 1.

[0056] As described above, by sequentially selecting two adjacent loop electrodes X in the order shown in FIG. 5 for the selection circuit 21A of the X-loop electrode group 12 for obtaining the X coordinate, detecting the signal from the electronic pen 2 is equivalent to a well-known detection method in the electromagnetic induction method of sequentially selecting the overlapping loop coils 14 with each other, as shown in FIG. 7. In the case of this example, by simultaneously selecting two adjacent loop electrodes, a loop coil with a width twice the array pitch of the loop electrodes can be formed.

[0057] The above has described the selection circuit 21A for the X-loop electrode group 12 for obtaining the X coordinate, but the selection circuit 22A for the Y-loop electrode group 13 for obtaining the Y coordinate can be configured in the same way.

[0058] That is, in this second embodiment, the selection circuit 22A is composed of a selection switch 221A and a selection switch 222A each having switches corresponding to the number of loop electrodes Y (Y1 to Y30). As shown in FIG. 4, the start ends Y1a to Y30a of the winding of each loop electrode Y (Y1 to Y30) are respectively connected to one end of each switch of the selection switch 221A, and the end ends Y1b to Y30b of the winding are respectively connected to one end of each switch of the selection switch 222A.

[0059] The other ends of the multiple switches of the selection switch 221A are commonly connected and connected to the common terminal YA' of the selection switch 221A. The other ends of the multiple switches of the selection switch 222A are commonly connected and connected to the common terminal YB' of the selection switch 222A. And the common terminal YA' of the selection switch 221A is connected to the movable terminal of the switching switch circuit 23YA of the mode switching circuit 23, and the common terminal YB' of the selection switch 222A is connected to the movable terminal of the switching switch circuit 23YB of the mode switching circuit 23.

[0060] And in the first example of this second embodiment, in the electromagnetic induction mode, the selection switches 221A and 222A are controlled to select two adjacent loop electrodes Y from the X-loop electrode group 12 described above, one by one, in the same manner as the selection control of two adjacent loop electrodes X, while sequentially shifting them one by one, under the selection control signal SEMy from the processing control circuit 26A.

[0061] Therefore, for the loop electrode Y, the operation is the same as that shown in FIG. 6, and an output α(i1 + i2) corresponding to the added value of the currents induced in the two loop electrodes Ym and Xm+1 (m = 1, 2, ···, 29) is obtained at the Y-side differential input amplifier 24Y of the pen signal receiving circuit 24. And for the Y-loop electrode group 13, it is equivalent to a well-known detection method in the electromagnetic induction method of sequentially selecting the overlapping loop coils.

[0062] As described above, in the electrostatic coupling mode, also in this second embodiment, the selection switches 211A and 212A, and the selection switches 221A and 222A are controlled to select one loop electrode X and one loop electrode Y at a time. Therefore, in the electrostatic coupling mode, from the processing control circuit 26A, SECx and SECy for turning on one of the multiple switches one by one are supplied to the selection switches 211A and 212A, and the selection switches 221A and 222A, respectively.

[0063] <Second Example of the Second Embodiment> In the above-described first example, in the electromagnetic induction mode, a plurality (two in this example) of adjacent loop electrodes X and loop electrode Y were selected simultaneously. However, it is also possible to simultaneously select two or more adjacent loop electrodes X and loop electrode Y. The second example is an example in that case, and the case of three will be described below.

[0064] That is, also in the case of this second example, the configuration of the position detection device uses the configuration of the position detection device 1A shown in FIG. 4 as it is. And in the position detection device of this second example, the selection control signals SEMx and SEMy supplied from the processing control circuit 26A to the two select switches 211A and 212A of the selection circuit 21A and the two select switches 221A and 222A of the selection circuit 22A in the electromagnetic induction mode are different from those in the first example.

[0065] FIG. 8 is a diagram for explaining the selection control of a plurality of switches of the select switches 211A and 212A in the electromagnetic induction mode in the position detection device 1A of the second example of this second embodiment.

[0066] In this example, the select switch 211A and the select switch 212A of the selection circuit 21A sequentially select the same three adjacent loop electrodes X. First, the three switches to which the loop electrodes X1, X2, and X3 are connected are turned on, and these loop electrodes X1, X2, and X3 are connected to the common terminals XA' and XB'. Next, the three switches to which the loop electrodes X2, X3, and X4 are connected are turned on, and these loop electrodes X2, X3, and X4 are connected to the common terminals XA' and XB'. Further, while shifting the loop electrode X to be selected one by one, such as loop electrodes X3, X4, and X5, X4, X5, and X6, X5, X6, and X7, the three loop electrodes X are connected to the common terminals XA' and XB'.

[0067] When three adjacent loop electrodes X are selected simultaneously in this way, as shown in FIG. 9, the three loop electrodes X (coils) are connected in parallel and supplied to the X-side differential input amplifier 24X. In this case, when the currents induced by the electromagnetic induction coupling with the electronic pen 2 in each of the three adjacent loop electrodes Xn, Xn+1, and Xn+2 (where n = 1, 2, ···, 38) are i1, i2, and i3, an output α(i1 + i2 + i3) corresponding to the sum of the currents induced in these three loop electrodes Xn, Xn+1, and Xn+2 is obtained at the X-side differential input amplifier 24X.

[0068] As described above, by setting the select switches 211A and 212A to sequentially select three adjacent loop electrodes X in the order shown in FIG. 8 to detect the signal from the electronic pen 2, as shown in FIG. 10, it is equivalent to a well-known detection method in the electromagnetic induction method of sequentially selecting the loop coils 15 arranged overlapping each other. In the case of this example, by selecting three adjacent loop electrodes simultaneously, a loop coil with a width three times the array pitch of the loop electrode X can be formed.

[0069] The selection circuit 22A for the Y loop electrode group 13 for obtaining the Y coordinate can be configured in the same way, and the three coils are connected in parallel and supplied to the Y-side differential input amplifier 24Y.

[0070] [Third Embodiment] In the position detection device 1A of the second embodiment described above, in the electromagnetic induction mode, in the selection circuits 21A and 22A, as shown in FIGS. 6 and 9, a plurality of loop electrodes X and a plurality of loop electrodes Y are connected in parallel and selected. However, the selection circuit can also be configured so that the loop electrodes (coils) are connected in series when a plurality of adjacent loop electrodes X and a plurality of loop electrodes Y are selected. The third embodiment is an example in that case.

[0071] FIG. 11 is a diagram for explaining a configuration example of the position detection device 1B according to the third embodiment. In the following description, the operation of the position detection device 1B according to the third embodiment in the electromagnetic induction mode will be mainly described.

[0072] In the position detection device 1B according to the third embodiment, as shown in FIG. 11, instead of the selection circuits 21 and 22 in the position detection device 1 according to the first embodiment, a selection circuit 21B and a selection circuit 22B are provided, and instead of the processing control circuit 26, a processing control circuit 26B is provided. Otherwise, the configuration is the same as that of the position detection device 1 according to the first embodiment. In FIG. 11, the same parts as those of the position detection device 1 according to the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted. In FIG. 11, the pen signal reception circuit 24 and the touch detection control circuit 25 are not shown.

[0073] In the third embodiment, the selection circuit 21B is composed of multiplexers 211B and 212B having the same configuration as the multiplexers 211 and 212 in the first embodiment, and a plurality of, in this example, 39 three-terminal switches SX1 to SX39, which is one less than the number of loop electrodes X (X1 to X40). The three-terminal switch has three terminals, namely, a first terminal, a second terminal, and a third terminal, and is a switch that can be set to connect between any two of these three terminals by a setting control signal.

[0074] The end-of-winding ends X1b to X39b of the loop electrodes X (X1 to X39) are each connected to the first terminal of each three-terminal switch SX1 to SX39, and the start-of-winding ends X2a to X40a of the loop electrodes X (X2 to X40) are each connected to the second terminal of each three-terminal switch SX1 to SX39. The third terminal of each three-terminal switch SX1 to SX39 is connected to the multiplexers 211B and 212B. However, the start-of-winding end X1a of the loop electrode X1 is directly connected to the multiplexer 212B, and the end-of-winding end X40b of the loop electrode X40 is directly connected to the multiplexer 211B.

[0075] In this embodiment, in addition to the mode switching signal MD, the processing control circuit 26B sends a setting control signal CTx for controlling the setting of each of the 3-terminal switches SX1 to SX39, a selection control signal SExA for the multiplexer 211B, and a selection control signal SExB for the multiplexer 212B.

[0076] For example, when connecting two adjacent loop electrodes X in series, first, the 3-terminal switch SX1 with the end X1b of the winding of the loop electrode X1 connected to the first terminal is set and controlled so that the first terminal and the second terminal are connected, and the 3-terminal switch SX2 with the end X2b of the winding of the adjacent loop electrode X2 connected to the first terminal is set and controlled so that the first terminal and the third terminal are connected. Then, the multiplexer 211B selects the 3-terminal switch SX2, and the multiplexer 212B is controlled to select the start end X1a of the winding of the loop electrode X1.

[0077] Next, the 3-terminal switch SX1 is set and controlled so that the first terminal and the third terminal are connected, the adjacent 3-terminal switch SX2 is set and controlled so that the first terminal and the second terminal are connected, and the further adjacent 3-terminal switch SX3 is set and controlled so that the first terminal and the third terminal are connected. Then, the multiplexer 211B selects the 3-terminal switch SX3 with the first terminal and the third terminal connected, and the multiplexer 212B is selection-controlled to select the 3-terminal switch SX1 with the first terminal and the third terminal connected in the same way.

[0078] Next, sets of three adjacent three-terminal switches SXn to SXn+2 are sequentially shifted and controlled one three-terminal switch at a time. Among the three adjacent three-terminal switches SXn to SXn+2, the three-terminal switches SXn and SXn+2 at both ends are controlled such that the first terminal is connected to the third terminal, and the central three-terminal switch SXn+1 is controlled such that the first terminal is connected to the second terminal. Then, the multiplexers 211B and 212B are controlled to select the three-terminal switches SXn+2 and SXn at both ends.

[0079] When the selection circuit 21B is selected and controlled in this way, as shown in FIG. 12, two loop electrodes X (coils) are connected in series and supplied to the X-side differential input amplifier 24X, and an output corresponding to the added value of the currents induced in the two loop electrodes X is obtained at the X-side differential input amplifier 24X.

[0080] Note that it is not limited to connecting two at a time in series. It is also possible to connect three adjacent loop electrodes X in series and control the sets of the three loop electrodes X to be shifted one by one. In the case of three or more, the start ends of the winding of the loop electrodes X at both ends are connected to the multiplexers 211B and 212B, and the loop electrodes X sandwiched between both ends are connected to each other, but the end of the winding and the start end of the winding are connected. Each of the three-terminal switches to which the plurality of loop electrodes X are connected is controlled.

[0081] The above is the description of the X loop electrode group 12. The selection circuit 22B for the Y loop electrode group 13 is similarly configured, and it is possible to control to connect a plurality of loop electrodes Y in series in the same way. That is, the selection circuit 22B includes multiplexers 221B and 222B having the same configuration as the multiplexers 221 and 222 of the first embodiment, and 29 three-terminal switches SY1 to SY29, which is one less than the number of loop electrodes Y (Y1 to Y30) in this example.

[0082] Then, these multiplexers 221B and 222B of the selection circuit 22B and the three-terminal switches SY1 to SY29 are controlled by the selection control signals SEyA and SEyB and the setting control signal CTy from the processing control circuit 26B, so that, in the same manner as in the case of the X-loop electrode group 12, a plurality of adjacent loop electrodes Y can be sequentially connected in series and selected.

[0083] Note that, in the electrostatic coupling mode of this third embodiment, in the same manner as in the second embodiment, the individual loop electrodes X and loop electrodes Y are selected by the selection circuit 21B and the selection circuit 22B.

[0084] [Other Embodiments] In the above-described embodiment, the position detection sensor 10 forms the loop electrode X and the loop electrode Y with a substantially transparent conductive material such as a metal mesh electrode in which fine lines of ITO, silver, copper, etc. are combined on the transparent substrate 11. For this reason, the electrode lines constituting the position detection sensor 10 are formed as a pattern having a predetermined width of about 1 millimeter, for example. When such a position detection sensor using electrode lines is used for the touch detection operation, the inner portions of the widths of the loop electrode X and the loop electrode Y become electrically hollow, so that the capacitance with a human body such as a finger decreases at the central portions of the loop electrode X and the loop electrode Y, and it becomes difficult to accurately obtain the indicated position by the finger.

[0085] In order to solve such a problem, protrusions protruding from the inside of the width of the loop electrode X and the inside of the width of the loop electrode Y may be formed from the pattern of the electrode lines constituting the loop electrode X and the loop electrode Y. FIGS. 13(A) and (B) are examples of protrusions protruding from the inside of the width of the loop electrode X and the inside of the width of the loop electrode Y from the pattern of the electrode lines constituting the loop electrode X and the loop electrode Y.

[0086] As shown in FIGS. 13(A) and (B), in the position detection sensor, since the loop electrode X and the loop electrode Y are arranged so as to be orthogonal and intersect, a rectangular cavity region 16 is formed by the widths of the loop electrode X and the loop electrode Y.

[0087] In the example of FIG. 13(A), from the electrode line pattern of the loop electrode X, at a position toward the center of the rectangular cavity region 16, two opposing protrusions 17a and 17b are formed so as to protrude in a direction intersecting orthogonally to the electrode line pattern. Also, from the electrode line pattern of the loop electrode Y, at the center position of the rectangular cavity region 16, two opposing protrusions 18a and 18b are formed so as to protrude in a direction intersecting orthogonally to the electrode line pattern.

[0088] Also, in the example of FIG. 13(B), protrusions 17c and 17d are formed so as to protrude in a direction intersecting orthogonally to the electrode line pattern of the loop electrode X. In this example, these protrusions 17c and 17d are formed so as to face away from each other toward a position shifted from the center of the rectangular cavity region 16. Similarly, protrusions 18c and 18d are formed so as to protrude in a direction intersecting orthogonally to the electrode line pattern of the loop electrode Y. In this example, these protrusions 18c and 18d are formed so as not to face each other toward a position shifted from the center of the rectangular cavity region 16.

[0089] According to the position detection sensor configured with the electrode pattern as shown in FIGS. 13(A) and (B) above, even when a finger touches the rectangular cavity region 16, since the protrusions 17a, 17b and the protrusions 18a, 18b or the protrusions 17c, 17d and the protrusions 18c, 18d exist in the cavity region 16, the finger will substantially contact the loop electrode X and the loop electrode Y, making it easier to detect a finger touch.

[0090] Even if projections 17a, 17b and projections 18a, 18b or projections 17c, 17d and projections 18c, 18d are provided inside the loop electrodes X and Y in this way, since the magnetic field radiated from the electronic pen is radiated over a region sufficiently wider than the line width of the projections, the projections 17a, 17b and projections 18a, 18b or projections 17c, 17d and projections 18c, 18d hardly affect when receiving the magnetic field signal from the electronic pen during the reception operation of the pen signal.

[0091] [Other embodiments or modifications] Note that in the above-described embodiment, in the electrostatic coupling mode, each of the loop electrode X and the loop electrode Y is configured to connect the start end and the end end to short-circuit, but one of the start end and the end end may be open (open end), and the other may be an end for connecting to the touch detection control circuit 25.

[0092] Also, in the above-described embodiment, the position detection sensor 10 is configured as a transparent sensor in which the loop electrode X and the loop electrode Y are formed by a metal mesh electrode combining thin lines such as ITO, silver, and copper on the transparent substrate 11. However, for applications other than the application of arranging on the display screen of the display device, an opaque sensor configuration may of course be used.

[0093] Also, in the above-described embodiment, the amplification circuits for the X-side input and the Y-side input of the pen signal receiving circuit 24 are configured as differential amplifiers, but one end of each of the loop electrode X and the loop electrode Y may be connected to a fixed potential, and the other end may be supplied to an amplifier with a single input.

[0094] Also, in the above-described embodiments, the position detection devices 1, 1A, and 1B are switched to execute the electromagnetic induction mode and the electrostatic coupling mode in a time-sharing manner by the mode switching signal MD from the processing control circuits 26, 26A, and 26B. However, of course, the switching between the electromagnetic induction mode and the electrostatic coupling mode may be manually switched by the user. In that case, the position detection device is provided with a changeover switch or a push button switch that can be switched by the user. For example, the processing control circuit switches between the electromagnetic induction mode and the electrostatic coupling mode according to the switching state of the changeover switch or the push button switch.

[0095] Also, when the position detection device is in a state of receiving a signal from the electronic pen through the position detection sensor, the position detection device may be switched to the electromagnetic induction mode, and when the signal from the electronic pen is not received through the position detection sensor, it may be switched to the electrostatic coupling mode.

[0096] Also, for example, a short-range wireless communication circuit of the Bluetooth (registered trademark) standard may be provided in both the electronic pen and the position detection device. When the short-range wireless communication circuit of the position detection device receives a signal from the electronic pen, the position detection device may be switched to the electromagnetic induction mode, and when the signal from the electronic pen is not received, it may be switched to the electrostatic coupling mode.

[0097] In the above-described embodiments, the second indicator to be detected in the electrostatic coupling mode is the finger of the human body, but it may be a passive electrostatic type electronic pen. It may also be an active electrostatic coupling type electronic pen. In the case of an active electrostatic coupling type electronic pen, instead of the touch detection control circuit 25, a circuit for receiving a signal from the active electrostatic coupling type electronic pen for each of the loop electrodes X and Y and detecting its level is provided.

[0098] Also, in the above-described embodiment, in the electromagnetic induction mode, the indicated position by the electronic pen 2 is detected by receiving a signal from the electronic pen 2 including an oscillation circuit. However, the present invention is not limited to this, and as the electronic pen, one including a resonance circuit composed of a coil and a capacitor may be used. In the electromagnetic induction mode, an AC signal is transmitted to the electronic pen by electromagnetic induction coupling from a position detection device, and the indicated position by the electronic pen is detected by receiving a signal fed back through the resonance circuit of the electronic pen. In this case, as the means for transmitting an AC signal to the electronic pen, the X loop electrode group 12 and the Y loop electrode group 13 may be used, or a loop coil may be separately provided for transmission.

Explanation of Signs

[0099] 1, 1A, 1B... Position detection device, 2... Electronic pen, 3... Finger, 10... Position detection sensor, 11... Transparent substrate, 12... X loop electrode group, 13... Y loop electrode group, 17a, 17b, 17c, 17d... Protrusion, 18a, 18b, 18c, 18d... Protrusion, 21, 21A, 21B... Selection circuit of X loop electrode, 22, 22A, 22B... Selection circuit of Y loop electrode, 23... Mode switching circuit, 24... Pen signal reception circuit, 25... Touch detection control circuit

Claims

1. A position detection device that simultaneously selects a plurality of the first electrodes adjacent to each other from a plurality of first electrodes arranged in a first direction and detects an indication position by an indicator, having a first common terminal and a second common terminal connected to a part of the plurality of first electrodes, and when in a state of electromagnetic induction coupling with an indicator, a first terminal of a plurality of the first electrodes adjacent to each other is connected to the first common terminal, and a second terminal of the plurality of the first electrodes adjacent to each other is connected to the second common terminal; a detection circuit, an amplification circuit that is connected to the first common terminal and the second common terminal of the detection circuit and obtains an output corresponding to an induced current flowing due to electromagnetic induction coupling with the indicator in a plurality of the first electrodes adjacent to each other, The position detection device is characterized by comprising the above.

2. The amplification circuit obtains an output corresponding to an added value of induced currents flowing due to electromagnetic induction coupling with the indicator in a plurality of the first electrodes adjacent to each other The position detection device according to claim 1, characterized by the above.

3. In a sensor having a plurality of the first electrodes arranged in the first direction, at a first timing, in order to detect an indication position of the indicator in a state of electromagnetic induction coupling with the indicator, a K-th first electrode and a (K + 1)-th first electrode adjacent to each other are simultaneously selected from the plurality of first electrodes, at a second timing, in order to detect an indication position of the indicator in a state of electromagnetic induction coupling with the indicator, a (K + 1)-th first electrode and a (K + 2)-th first electrode adjacent to each other are simultaneously selected from the plurality of first electrodes The position detection device according to claim 1, characterized by the above.

4. A plurality of first electrodes arranged in a first direction, a detection circuit that simultaneously selects a plurality of the first electrodes adjacent to each other from the plurality of first electrodes and detects an indication position by the indicator when in a state of electromagnetic induction coupling with the indicator, a sensor having the plurality of first electrodes arranged in the first direction, a signal processing circuit coupled to the sensor for detecting various positions indicated by a plurality of the indicators on the sensor, a selection circuit for selecting the plurality of first electrodes, Comprising the above, The selection circuit selects the first electrode so that an induced current is induced in the first electrode so as to detect the indicated position by the first indicator on the sensor by electromagnetic induction coupling between the first indicator and the sensor. The selection circuit selects the first electrode so that no induced current is induced in each of the first electrodes, and detects the indicated position by the second indicator by electrostatic coupling between the second indicator on the sensor and the sensor. A position detection device characterized by the above.

5. In the sensor, each of the plurality of first electrodes is formed as a loop electrode. Each of the plurality of first electrodes has a protrusion protruding toward the inside of the loop electrode. The position detection device according to claim 4, characterized by the above.

6. The protrusion increases the electrostatic coupling with the indicator. The position detection device according to claim 5, characterized by the above.

7. When selecting the first electrode, both ends of the loop electrode composed of the first electrode are short-circuited, and the position by the second indicator on the sensor is detected by using the electrostatic coupling between the second indicator and the sensor. The position detection device according to claim 4, characterized by the above.

8. When selecting the first electrode, one end of the loop electrode composed of the first electrode is an open end, and the indicated position by the second indicator on the sensor is detected by using the electrostatic coupling between the second indicator and the sensor. The position detection device according to claim 4, characterized by the above.

9. A plurality of first electrodes arranged in a first direction, A detection circuit that simultaneously selects a plurality of adjacent first electrodes from the plurality of first electrodes when in a state of electromagnetic induction coupling with an indicator to detect the indicated position by the indicator. A sensor in which the plurality of first electrodes are arranged in a first direction and a plurality of second electrodes are arranged in a second direction intersecting the first direction, and a signal processing circuit connected to the sensor for detecting individual positions indicated by a plurality of indicators on the sensor. The first electrode and the second electrode are each formed as a loop electrode. The signal processing circuit includes a selection circuit that selects the plurality of first electrodes and the plurality of second electrodes. The selection circuit selects the first electrode and the second electrode so that an induced current is induced in each of the first electrode and the second electrode, whereby an indication position on the sensor by the first indicator is detected by utilizing electromagnetic inductive coupling between the first indicator and the sensor. The selection circuit selects the first electrode and the second electrode so that an induced current is not induced in each of the first electrode and the second electrode, whereby an indication position on the sensor by the second indicator is detected by electrostatic coupling between the second indicator and the sensor. A position detection device characterized by the above.

10. A plurality of first loop electrodes composed of the plurality of first electrodes arranged so as not to overlap each other in the first direction, and a plurality of second loop electrodes composed of the plurality of first electrodes arranged so as not to overlap each other in a second direction intersecting the first direction. The position detection device according to claim 1, claim 4, or claim 9, characterized by comprising the above.

11. A control device for controlling a position detection device, wherein the position detection device simultaneously selects a plurality of the first electrodes adjacent to each other from the plurality of first electrodes arranged in the first direction to detect an indication position by an indicator. It has a first common terminal and a second common terminal connected to a part of the plurality of first electrodes, and in a state of electromagnetic inductive coupling with an indicator, the first terminals of the plurality of first electrodes adjacent to each other are connected to the first common terminal, and a detection electrode connection circuit in which the second terminals of the plurality of first electrodes adjacent to each other are connected to the second common terminal. An amplification circuit that obtains an output corresponding to an induced current flowing due to electromagnetic inductive coupling with the indicator in the plurality of first electrodes adjacent to each other connected to the first common terminal and the second common terminal of the detection electrode connection circuit. A control device characterized by comprising the above.

12. The position detection device includes a sensor having the plurality of first electrodes arranged in the first direction. At a first timing, in order to detect an indication position of the indicator in a state where the indicator and the sensor are in electromagnetic inductive coupling, the K-th first electrode and the (K + 1)-th first electrode adjacent to each other are simultaneously selected from the plurality of first electrodes. At the second timing, in order to detect the indicated position of the indicator when the indicator and the sensor are in an electromagnetic induction coupling state, the (K + 1)-th first electrode and the (K + 2)-th first electrode adjacent to each other are simultaneously selected from the plurality of first electrodes. The control device according to claim 11, characterized in that.

13. A control device for controlling a position detection device, The position detection device includes a plurality of first electrodes arranged in a first direction; a detection circuit that detects an indicated position by an indicator in an electromagnetic induction coupling state with the indicator by the plurality of first electrodes; a sensor having the plurality of first electrodes arranged in the first direction; a signal processing circuit coupled to the sensor for detecting various positions indicated by a plurality of the indicators on the sensor; a selection circuit for selecting the plurality of first electrodes; and is provided with when detecting the indicated position, a plurality of the first electrodes adjacent to each other are simultaneously selected from the plurality of first electrodes, and the selection circuit selects the first electrodes so that an induced current is induced in the first electrodes, whereby the position indicated by the first indicator on the sensor is detected by electromagnetic induction coupling between the first indicator and the sensor. The first electrodes are selected by the selection circuit so that no induced current is induced in each of the first electrodes, and the indicated position by the second indicator is detected by electrostatic coupling between the second indicator on the sensor and the sensor. A control device characterized by that.

14. When selecting the first electrode, by short-circuiting both ends of the loop electrode formed by the first electrode, the indicated position by the second indicator on the sensor is detected by using the electrostatic coupling between the second indicator and the sensor. The control device according to claim 13, characterized in that.

15. When selecting the first electrode, by making one end of the loop electrode formed by the first electrode an open end, the indicated position by the second indicator on the sensor is detected by using the electrostatic coupling between the second indicator and the sensor. The control device according to claim 13, characterized in that.

16. a sensor in which a plurality of first electrodes are arranged side by side in a first direction; a signal processing circuit coupled to the sensor for detecting positions indicated by a plurality of indicators on the sensor; and a selection circuit for selecting the plurality of first electrodes, comprising, in a state where the indicator and the sensor are in electromagnetic induction coupling, the K-th first electrode and the (K + 1)-th first electrode adjacent to each other among the plurality of first electrodes are simultaneously selected at a first timing, a position detection device that detects an indication position by an indicator by simultaneously selecting the (K + 1)-th first electrode and the (K + 2)-th first electrode adjacent to each other among the plurality of first electrodes at a second timing, the selection circuit selects a first electrode so that an induced current is induced in the first electrode, whereby an indication position by the first indicator on the sensor is detected by electromagnetic induction coupling between the first indicator and the sensor, the first electrode is selected by the selection circuit so that an induced current is not induced in the first electrode, and an indication position by a second indicator on the sensor is detected using electrostatic coupling between the second indicator and the sensor A position detection device characterized by the above.

17. comprising a detection circuit, the detection circuit simultaneously selects a plurality of the first electrodes adjacent to each other from the plurality of first electrodes in a state where the indicator and the sensor are in electromagnetic induction coupling to detect an indication position by the indicator The position detection device according to claim 16, characterized by the above.

18. the detection circuit includes a first common terminal and a second common terminal connected to a part of the plurality of first electrodes, in a state where the indicator and the sensor are in electromagnetic induction coupling, a first terminal of one of the plurality of first electrodes adjacent to each other and a first terminal of another one of the electrodes are connected to the first common terminal, and a second terminal of the one electrode and a second terminal of the another one of the electrodes are connected to a second common terminal The position detection device according to claim 17, characterized by the above.

19. comprising an amplification circuit that amplifies individual currents induced by electromagnetic induction coupling in a plurality of the first electrodes selected simultaneously The position detection device according to claim 18, characterized by the above.

20. comprising a detection circuit having a first common terminal and a second common terminal, the first common terminal and the second common terminal of the detection circuit are respectively connected to the first terminals and the second terminals of the plurality of first electrodes in a state where the indicator and the sensor are in electromagnetic induction coupling The position detection device according to claim 16, characterized by the above.

21. In the sensor, each of the plurality of first electrodes is formed as a loop electrode, each of the plurality of first electrodes has a protrusion protruding toward the inside of the loop electrode The position detection device according to claim 16, characterized in that.

22. The protrusion increases the electrostatic coupling with the indicator The position detection device according to claim 21, characterized in that.

23. When selecting the first electrode, both ends of the loop electrode formed by the first electrode are short-circuited, and the indicated position by the second indicator on the sensor is detected by using the electrostatic coupling between the second indicator and the sensor The position detection device according to claim 16, characterized in that.

24. When selecting the first electrode, by making one end of the loop electrode formed by the first electrode an open end, the indicated position by the second indicator on the sensor is detected by using the electrostatic coupling between the second indicator and the sensor The position detection device according to claim 16, characterized in that.

25. A sensor in which a plurality of first electrodes are arranged side by side in a first direction is provided, In a state where the indicator and the sensor are electromagnetically inductively coupled, the Kth first electrode and the (K + 1)th first electrode adjacent to each other among the plurality of first electrodes are simultaneously selected at a first timing, A position detection device that detects the indicated position by the indicator by simultaneously selecting the (K + 1)th first electrode and the (K + 2)th first electrode adjacent to each other among the plurality of first electrodes at a second timing, The plurality of first electrodes are arranged in a first direction, and a sensor in which a plurality of second electrodes are arranged in a second direction intersecting the first direction, and a signal processing circuit connected to the sensor for detecting individual positions indicated by a plurality of indicators on the sensor, The first electrode and the second electrode are each formed as a loop electrode, The signal processing circuit includes a selection circuit that selects the plurality of first electrodes and the plurality of second electrodes, The first electrode and the second electrode are selected by the selection circuit so that an induced current is induced in each of the first electrode and the second electrode, thereby detecting the position indicated by the first indicator on the sensor by using the electromagnetic inductive coupling between the first indicator and the sensor, The selection circuit selects the first electrode and the second electrode so that induced current is not induced in each of the first electrode and the second electrode, whereby the position indicated by the second indicator on the sensor is detected by electrostatic coupling between the second indicator and the sensor. The position detection device according to the above-described feature. Claim 26 A plurality of first loop electrodes composed of the plurality of first electrodes arranged so as not to overlap each other in the first direction, and a plurality of second loop electrodes arranged so as not to overlap each other in a second direction intersecting the first direction. The position detection device according to claim 16, comprising:

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