Source: https://patents.google.com/patent/JP5094376B2/en
Timestamp: 2020-06-04 04:35:54
Document Index: 680078764

Matched Legal Cases: ['art 13', 'art 14', 'art 13', 'art 13', 'art 18', 'art 13', 'art 18', 'art 13', 'art 14', 'art 4', 'art, 5', 'art, 13', 'art, 14', 'art, 15']

JP5094376B2 - Position detection device - Google Patents
JP5094376B2
JP5094376B2 JP2007340099A JP2007340099A JP5094376B2 JP 5094376 B2 JP5094376 B2 JP 5094376B2 JP 2007340099 A JP2007340099 A JP 2007340099A JP 2007340099 A JP2007340099 A JP 2007340099A JP 5094376 B2 JP5094376 B2 JP 5094376B2
JP2007340099A
JP2009162538A (en
JP2009162538A5 (en
2007-12-28 Application filed by 株式会社ワコム filed Critical 株式会社ワコム
2007-12-28 Priority to JP2007340099A priority Critical patent/JP5094376B2/en
2009-07-23 Publication of JP2009162538A publication Critical patent/JP2009162538A/en
2010-09-09 Publication of JP2009162538A5 publication Critical patent/JP2009162538A5/ja
2012-12-12 Publication of JP5094376B2 publication Critical patent/JP5094376B2/en
The present invention relates to a position detection device that detects a coordinate position indicated by a position indicator or a human body (finger) by superimposing a capacitive detection unit and an electromagnetic induction detection unit.
Conventionally, a position detection device has been used as a device for performing position input in an information processing apparatus such as a personal computer device. In this position detection device, for example, a pointing operation or input information such as characters and drawings is input by a position indicator formed in a pen shape or input means including a human body (finger).
As an input method using a position indicator as an input means, the position indicator is provided with a resonance circuit that resonates with an electromagnetic wave of a specific frequency transmitted from a position detection device, and the position of a resonance signal generated by this resonance circuit is detected. There is an electromagnetic induction method in which a position is indicated to a position detection device by transmitting to the device. (For example, see Patent Document 1)
An input method using a human body as an input means includes a capacitance method as shown in FIG. FIG. 12 is an explanatory diagram schematically illustrating a capacitance type detection unit. As shown in FIG. 12, the detection unit 200 includes a flat detection electrode 201 and a capacitance measurement unit 202. The capacitance type detection unit 200 generates a capacitance between the human body (finger) and the detection electrode 201 when the human body (finger) approaches or contacts the detection electrode 201. Then, the capacitance measurement unit 202 measures the increase or decrease in capacitance generated between the human body and the detection electrode 201, thereby detecting the coordinates at which the human body (finger) approaches or contacts. At this time, since it is easier to detect if the capacitance generated between the detection electrode 201 and the human body (finger) is as large as possible, the detection electrode 201 is a planar electrode having a certain area.
In general, an electromagnetic induction type detection unit is suitable for inputting fine characters and drawings. On the other hand, since the capacitance method can use a human body (finger) as an input means, it can input easily. For this reason, a new type of position detection device has been devised and proposed that takes advantage of both the electromagnetic induction type detection unit and the capacitance type detection unit.
JP-A-7-302153
Therefore, a detection device that can use two detection methods of an electromagnetic induction method and a capacitance method in a common input area has been studied. Such a position detection device makes it possible to use a common input area by superimposing an electromagnetic induction type detection unit and a capacitance type detection unit, and to use both input methods without increasing the size of the coordinate input device. It is a thing. Hereinafter, an outline of such a position detection apparatus will be described with reference to FIG.
FIG. 13 is an explanatory diagram schematically showing a position detection device in which a first detection unit using an electrostatic capacitance method and a second detection unit using an electromagnetic induction method are overlapped. As shown in FIG. 13, a detection electrode 201 constituting a capacitance type detection unit is arranged above a loop coil 304 constituting an electromagnetic induction type detection unit.
However, in the position detection device having such a configuration, the magnetic flux G generated from the coil 27 of the position indicator 2 is orthogonal to the detection electrode 201 in the electrostatic capacity detection unit. Then, an eddy current I is generated in the detection electrode 201. The eddy current I generated by the detection electrode 201 generates a new magnetic flux in a direction (a direction opposite to the magnetic flux G) in which the magnetic flux G from the position indicator 2 is attenuated. Therefore, the magnetic flux G from the position indicator 2 is attenuated, thereby causing a problem that the magnetic flux G that can be detected by the electromagnetic induction type detection unit is reduced and the detection accuracy is lowered.
Similarly, when magnetic flux is generated from the loop coil 304, an eddy current is generated in the detection electrode 201. As a result, the magnetic flux reaching the position indicator 2 is reduced, causing a problem that a sufficient induced electromotive force cannot be obtained in the resonance circuit of the position indicator 2.
Therefore, it is conceivable to reduce the area of the detection electrode in order to reduce the magnitude of the eddy current generated in the detection electrode. However, if the area of the detection electrode is reduced, the capacitance generated between the human body (finger) and the detection electrode is also reduced, so that there is a disadvantage that the detection accuracy in the detection unit of the capacitance type is lowered.
An object of the present invention is to prevent or suppress a decrease in detection accuracy in the first detection unit using the capacitance method in consideration of the above-described problems, and in the second detection unit using the electromagnetic induction method. An object of the present invention is to provide a position detection device capable of preventing or suppressing a decrease in detection accuracy.
Order to solve the above problems and achieve the object of the present invention, the position detecting device of the present invention includes a first detection portion by the electrostatic capacitance method for detecting a position where the pointer is indicated, the position indicator A second detection unit using an electromagnetic induction method for detecting a position indicated by the position indicator by receiving magnetic flux generated by the provided coil . The first detection unit and the second detection unit are superposed such that the first detection unit is disposed between the position indicated by the position indicator and the second detection unit. In the detection unit, a plurality of electrodes arranged in the first direction and a plurality of electrodes arranged in the second direction intersecting the first direction are arranged close to each other. The plurality of electrodes arranged in the first direction and the plurality of electrodes arranged in the second direction are electrically connected to each other, and the first direction and the second direction of the first detection unit Each of the plurality of electrodes provided in the direction is provided with a slit. Due to the action of the slit, the eddy current generated in each electrode is minimized, and when the second detector receives the magnetic flux generated by the coil provided in the position indicator, the eddy current due to the magnetic flux is reduced. The loss is reduced.
According to the position detection device of the present invention, the slit is provided in the detection electrode of the first detection unit using the capacitance method, thereby preventing or suppressing the generation of eddy current in the detection electrode. it can. Thereby, the fall of the detection accuracy of the 2nd detection part using an electromagnetic induction system can be prevented or controlled.
Hereinafter, embodiments of the position detection device of the present invention will be described with reference to FIGS. Here, FIG. 1 is a perspective view showing an embodiment of the position detection device of the present invention, FIG. 2 is a block diagram for explaining the configuration and operation of the position detection device, and FIG. 3 shows an input unit. FIG. 4 is an exploded perspective view, FIG. 4 is a plan view showing one surface of the first detection unit, FIGS. 5A and 5B are plan views showing detection electrodes according to the first detection unit, and FIG. FIG. 7 is an enlarged plan view showing the main part of the first detection unit, and FIG. 8 is a diagram for explaining the configuration and operation of the second detection unit. FIG. 9 is an explanatory diagram schematically showing a state in which the detection electrode is superimposed on the loop coil according to the second detection unit. In addition, the same code | symbol is attached | subjected to the common member in each figure. The present invention is not limited to the following form.
First, a schematic configuration of a position detection apparatus to which the present invention is applied will be described with reference to FIG. FIG. 1 is a perspective view showing a position detection apparatus to which the present invention is applied.
As shown in FIG. 1, a position detection device 1 according to an embodiment of the present invention (hereinafter referred to as “this example”) is connected to an external device (not shown) such as a personal computer or a PDA (Personal Digital Assistant). 10 is used as an input device for these external devices. Although not specifically illustrated and described, the position detection device 1 may be built in a personal computer or the like.
The position detection device 1 includes a first detection unit 13 that is a capacitive detection unit and a second detection unit 14 that is an electromagnetic induction detection unit, which will be described later. Furthermore, the position detection device 1 is used to input characters, drawings, and the like by a pointing operation via the position indicator 2 or a human body (finger).
The position indicator 2 indicates the position to the position detection device 1 by an electromagnetic induction method. That is, the position indicator 2 has a resonance circuit including a coil and a capacitor that resonates with respect to an electromagnetic wave having a specific frequency transmitted from the position detection device 1. The position detection device 1 is instructed to transmit a position by transmitting a resonance signal detected by the resonance circuit to the position detection device 1.
The position detection device 1 includes an input unit 4 to which input information is input, a case 5 having a hollow thin and substantially rectangular parallelepiped shape having the input unit 4 and the like. The housing 5 has an upper case 7 having an opening 6 for exposing the input surface of the input unit 4, and a lower case (not shown) superimposed on the upper case 7. The upper case 7 has a rectangular opening 6 that exposes the input surface of the input unit 4, and the input unit 4 is fitted into the opening 6.
Next, an outline of a circuit configuration of the position detection apparatus to which this example is applied will be described with reference to FIG. As illustrated in FIG. 2, the position detection device 1 includes an input unit 4, a capacitance measurement unit 22, an electromagnetic induction detection unit 23, and a processing circuit 25. The input unit 4 includes a cover 12 that is an insulator, a first detection unit 13 that uses an electrostatic capacitance method, and a second detection unit 14 that uses an electromagnetic induction method. The 1st detection part 13 detects the approach or contact of a human body (finger) etc., and detects the coordinate of the point which approached or contacted. On the other hand, the second detection unit 14 is for detecting the coordinates of the point indicated by the position indicator 2.
The capacitance measuring unit 22 is a circuit for measuring a change in capacitance at a detection electrode provided on the first detection unit 13, and is connected to the first detection unit 13 and the processing circuit 25. Has been. The electromagnetic induction detection unit 23 is a circuit for detecting the position of the point indicated by the position indicator 2 by the electromagnetic induction method, and is connected to the second detection unit 14 and the processing circuit 25. The processing circuit 25 is a circuit for calculating, as coordinate data, a point detected by the human body or the position indicator 2 detected by the capacitance measuring unit 22 or the electromagnetic induction detecting unit 23. Then, the processing circuit 25 outputs the calculated coordinate data to an external device (not shown) (for example, a personal computer or a PDA), a central processing unit (MPU) of a personal computer incorporating the position detection device 1 or the like. It has become.
Next, the configuration of the input unit 4 of the position detection device 1 of this example will be described with reference to FIG. The input unit 4 has a thin flat plate shape, and includes a cover 12 that is an insulator, a first detection unit 13 having a detection region 16 on one surface, and a second detection unit having a plurality of loop coils 24. 14. The input unit 4 is arranged so that one surface of the cover 12 and one surface of the first detection unit 13 face each other. And the 2nd detection part 14 is arrange | positioned so that the other surface of this 1st detection part 13 may be opposed. Thus, in the input unit 4, the cover 12, the first detection unit 13, and the second detection unit 14 overlap each other.
Next, the structure of the 1st detection part 13 of the position detection apparatus 1 of this example is demonstrated with reference to FIGS. First, as shown in FIG. 4, the first detection unit 13 includes a substantially rectangular substrate 13a and a substantially rectangular detection region 16 provided at a substantially central portion of one surface (hereinafter referred to as a surface) of the substrate 13a. It consists of and. The detection region 16 detects the approach or contact of a human body (finger) or the like, and detects the coordinates of the point that has approached or contacted. The detection region 16 includes a plurality of detection electrodes 15. The detection electrodes 15 arranged on the outer periphery of the plurality of detection electrodes 15 constituting the detection region 16 have a substantially triangular shape, and the detection electrodes 15 arranged on the inner side have a substantially rectangular shape. Yes.
Next, details of the detection region 16 will be described with reference to FIGS. 5 and 6. The detection region 16 is composed of a first detection electrode group 16A shown in FIG. 5A and a second detection electrode group 16B shown in FIG. 5B.
As shown in FIG. 5A, the first detection electrode group 16A is a plurality of rows of detection electrodes 15 connected at a predetermined interval in parallel with the short side direction (hereinafter referred to as the Y-axis direction) of the substrate 13a. The first detection electrode array 15a. The first detection electrode group 16A includes a plurality of first detection electrode arrays 15a with a predetermined interval in a longitudinal direction (hereinafter referred to as X-axis direction) orthogonal to the Y-axis direction of the substrate 13a. It is formed side by side. In the first detection electrode row 15a, the detection electrodes 15 adjacent in the Y-axis direction are electrically connected to each other by connecting the vertices facing each other by the connecting portion 18a.
Similarly, as shown in FIG. 5B, the second detection electrode group 16B includes a plurality of second detection electrodes which are a row of a plurality of detection electrodes 15 connected at predetermined intervals in parallel with the X-axis direction of the substrate 13a. It consists of an electrode array 15b. The second detection electrode group 16B is formed by arranging a plurality of second detection electrode rows 15b at predetermined intervals in the Y-axis direction of the substrate 13a. In the second detection electrode row 15b, the detection electrodes 15 adjacent in the X-axis direction are electrically connected by connecting the opposing vertices with the connecting portion 18b.
Then, the first and second detection electrode groups 16A and 16B are filled with the gaps between the detection electrodes 15 in the first and second detection electrode groups 16A and 16B as shown in FIG. A detection region 16 is configured. As described above, the detection region 16 is arranged so as to fill the gaps between the detection electrodes 15 in the first and second detection electrode groups 16A and 16B, so that the human body (finger) is placed on the first detection unit 13. When approaching or contacting, the human body (finger) is structured to face both detection electrodes 15 of the first and second detection electrode groups 16A and 16B.
And the connection part 18a in the 1st detection electrode row | line | column 15a connects adjacent detection electrodes 15 to the other surface (henceforth a back surface) side of the 1st detection part 13, as shown in FIG. Yes. On the other hand, the connection part 18b in the 2nd detection electrode row | line | column 15b has connected adjacent detection electrodes 15 on the surface side of the 1st detection part 13. FIG. As a result, as shown in FIG. 4, when the first and second detection electrode groups 16A and 16B are arranged, the connection portion 18a of the first detection electrode group 16A and the connection portion of the second detection electrode group 16B. 18b is prevented from contacting.
As shown in FIG. 6, a plurality of lead wires 17 are provided on the back surface of the first detection unit 13. The first and second detection electrode groups 16 </ b> A and 16 </ b> B are connected to the capacitance measuring unit 22 through the lead wires 17.
In addition, the size of the individual detection electrodes 15 constituting the detection region 16 is different from that of each of the first and second detection electrode groups 16A and 16B when a human body (finger) approaches or contacts the input unit 4. Thus, it is preferable that at least two detection electrodes 15 have such a size as to face the human body (finger). As a result, at least two detection electrodes 15 face the human body (finger) in the X-axis direction and the Y-axis direction, and therefore approach or contact the input unit 4 due to the difference in capacitance between the two detection electrodes 15. The position of the human body (finger) can be detected more accurately.
Next, the shape of the detection electrode 15 will be described with reference to FIG. As shown in FIG. 7, the detection electrode 15 is formed in a substantially square shape (the detection electrode 15 located on the outer periphery is a substantially triangular shape), and a plurality of slits 19 are formed. The plurality of slits 19 are provided in parallel to each other and at substantially equal intervals. The plurality of slits 19 are formed in six lines on both sides symmetrically about a line connecting the vertices to which the connecting portions 18a and 18b are connected. Further, the slit 19 extends from the outer edge to the inner side of the detection electrode 15, opens at the outer edge of the detection electrode 15, and closes inside the detection electrode 15. As a result, the detection electrode 15 has a comb shape as a whole. The slit 19 is formed by etching the detection electrode 15.
Further, in this detection electrode 15, for example, the length of the diagonal line from the vertex to the opposite vertex is set to 5 mm, and the width of the slit 19 is set to about 0.1 mm. Thus, the opening area of the slit 19 is set to be sufficiently smaller than the area of the detection electrode 15. For this reason, the area of the detection electrode 15 of this example having the slit 19 is almost the same as the area of the conventional detection electrode not having the slit 19. Thereby, it can be said that the detection accuracy of the first detection unit 13 based on the electrostatic capacitance method used in this example can be maintained at substantially the same accuracy as that of the conventional device having no slit.
In addition, although the example which formed the shape of the detection electrode 15 in the substantially square shape was demonstrated in this example, it is not limited to this. For example, the detection electrode may be formed in a hexagonal shape or a circular shape. Here, when the shape of the detection electrode is hexagonal, it is preferable to arrange a plurality of detection electrodes in a honeycomb shape. Further, although the number of slits 19 is six on each side, it is not limited to this, and the number of slits 19 may be seven or more, or five or less on both sides. Furthermore, although the example which formed by etching the slit 19 was demonstrated above, the formation method of the slit 19 is not limited to this. Needless to say, the slit 19 may be formed by means other than etching.
Next, the operation of the first detection unit 13 will be described. The capacitance measuring unit 22 applies a predetermined voltage to the plurality of detection electrodes 15. When the human body (finger) approaches or comes into contact with the detection electrode 15, the human body (finger) is regarded as a grounded body. Therefore, the human body (finger) and the detection electrode 15 between which the human body (finger) approaches or contacts The capacitance changes. The capacitance measuring unit 22 identifies the detection electrode 15 in which the capacitance has changed, performs a calculation process based on the position, the degree of change in the capacitance, and the like, so that the human body (finger) makes contact. The detected position is detected.
Next, configurations and operations of the second detection unit 14 and the electromagnetic induction detection unit 23 will be described with reference to FIG. In the second detection unit 14, a plurality of loop coils 24 are arranged on the surface opposite to the back surface of the first detection unit 13, and the plurality of loop coils 24 are connected to the electromagnetic induction detection unit 23. ing.
As shown in FIG. 8, the second detector 14, for example, a forty loop coils 24X 1 ~24X 40 that are arranged side by side in the X-axis direction, 40 pieces of loop coils arranged in the Y-axis direction 24Y 1 to 24Y 40 . The loop coils 24X 1 to 24X 40 and the loop coils 24Y 1 to 24Y 40 are connected to the selection circuit 106 of the electromagnetic induction detection unit 23 that selects each loop coil 24. In this embodiment, the number of loop coils 24 is 40, but the present invention is not limited to this.
The electromagnetic induction detection unit 23 includes a selection circuit 106, a transmission / reception switching circuit 107, an amplifier 108, a detection circuit 109, a low-pass filter (LPF) 110, and a sample hold circuit 112. The selection circuit 106 is connected to a transmission / reception switching circuit 107, and an amplifier 108 is connected to the reception side of the transmission / reception switching circuit 107. The amplifier 108 is connected to a detection circuit 109, and the detection circuit 109 is connected to a sample hold circuit 112 via a low-pass filter (LPF) 110. Further, the sample hold circuit 112 is connected to an analog / digital conversion circuit (AD conversion circuit) 113, and this analog / digital conversion circuit 113 is connected to a CPU (central processing unit) 114. The CPU 114 supplies control signals to the selection circuit 106, the sample hold circuit 112, the analog / digital conversion circuit 113, and the transmission / reception switching circuit 107 described above.
The electromagnetic induction detection unit 23 is provided with an oscillator 116 that generates an AC signal having a frequency f 0 and a current driver 117 that converts the AC signal into a current. The current driver 117 is connected to the transmission side of the transmission / reception switching circuit 107. It is connected to the. That is, when the contact of the reception switching circuit 107 by a control signal supplied from the CPU114 is switched to the transmission side, the magnetic field from the loop coils 24X 1 ~24X 40 and loop coils 24Y 1 ~24Y 40 of the second detection unit 14 occurs To do.
When the position indicator 2 approaches the input unit 4, the resonance circuit built in the position indicator 2 resonates and an induced voltage is generated. Thereafter, when the contact of the transmission / reception switching circuit 107 is switched to the reception side by the control signal supplied from the CPU 114, the second detection unit 14 of the input unit 4 does not supply the magnetic field to the position indicator 2. Then, a magnetic field is generated from the coil built in the position indicator 2 by the induced voltage generated at the time of reception. And the 2nd detection part 14 detects the position of the position indicator 2 by detecting the magnetic field which the coil incorporated in this position indicator 2 generate | occur | produced.
With the position detection device 1 having such a configuration, it is possible to perform an input operation using an electrostatic capacity method and an electromagnetic induction method, and operability can be improved. When performing an input operation with the position indicator 2, there is a possibility that a hand holding the position indicator 2 may come into contact with the input unit 4. Therefore, when the position indicator 2 and a human body (finger) approach or contact the input unit 4 at the same time, the position of the position indicator 2 may be detected with priority.
Moreover, the switching of the detection method in the input part 4 is not limited to what was mentioned above. For example, a detection switch for allowing the user to arbitrarily switch the detection method of the input unit 4 between the first detection unit 13 and the second detection unit 14 may be provided. Alternatively, the detection method may be switched to the first detection unit 13 or the second detection unit 14 for each region in which the position indicator 2 and the human body (finger) are approaching or in contact with the input unit 4.
Next, a state when the position of the position indicator 2 is detected by the second detection unit 14 will be described with reference to FIG.
When the position indicator 2 approaches the loop coil 24 constituting the second detection unit 14, as described above, the resonance circuit incorporated in the position indicator 2 resonates and an induced voltage is generated. Thereafter, when the contact of the transmission / reception switching circuit 107 shown in FIG. 8 is switched to the reception side, the magnetic field is not supplied to the position indicator 2. As a result, a magnetic field is generated from the coil 27 built in the position indicator 2 by the induced voltage generated at the time of reception.
Here, as shown in FIG. 9, a detection electrode 15 as the first detection unit 13 is disposed between the loop coil 24 and the position indicator 2. Therefore, when the magnetic flux G is generated from the coil 27 built in the position indicator 2, the magnetic flux G from the position indicator 2 is applied to the detection electrode 15, and the magnetic flux G is reduced on the surface of the detection electrode 15. Eddy current is generated.
However, as described above, the detection electrode 15 is provided with a plurality of slits 19 at substantially equal intervals. The plurality of slits 19 are formed by notching from the outer edge to the inner side of the detection electrode 15. For this reason, the detection electrode 15 is partially divided by the plurality of slits 19, so that a large eddy current does not occur. Thus, by minimizing the eddy current generated in the detection electrode 15, it is possible to prevent the generation of the magnetic flux opposite to the magnetic flux G generated by the eddy current. As a result, it is possible to prevent or suppress the magnetic flux G from the position indicator 2 from being attenuated.
Although the magnetic flux from the coil 27 of the position indicator 2 has been described with reference to FIG. 9, the magnetic flux output from the loop coil 24 provided in the second detection unit 14 to the coil 27 of the position indicator 2 is also described. Similarly, it can be prevented or suppressed from being attenuated. Thereby, since it can prevent or suppress that the magnetic flux from the position indicator 2 and the loop coil 24 attenuate | damps in the detection electrode 15, the fall of the induced electromotive force in the position indicator 2 can be prevented or suppressed.
Next, another embodiment of the detection electrode will be described with reference to FIGS. FIG. 10 is a plan view showing another embodiment of the detection electrode according to the position detection apparatus of this example, and FIG. 11 is a plan view showing still another embodiment of the detection electrode.
The detection electrodes 35 shown in FIG. 10 are formed so that the open ends of the slits 39 are staggered from the apex to which the connecting portion 18 is connected. Further, the slit 49 in the detection electrode 45 shown in FIG. 11 is formed from one outer edge to the other side of the line connecting the apexes to which the connecting portions 18 are connected, and one side is open and the other side is closed. Yes. Such detection electrodes 35 and 45 can provide the same effects as those of the detection electrode 15 described above.
The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention described in the claims. In addition, although the case and the input unit have been described as a quadrangle, the shape of the case and the input unit may be a circle, a triangle, a hexagon, an octagon, or the like. Furthermore, although the example which formed the slit linearly with respect to the detection electrode was demonstrated, it is not limited to this, You may form a slit so that it may waved in the curve shape.
It is a perspective view which shows embodiment of the position detection apparatus of this invention. It is a block diagram which shows the structure of the position detection apparatus of this invention. It is a disassembled perspective view which shows the input part which concerns on the position detection apparatus of this invention. It is a top view which shows the 1st detection part which concerns on the position detection apparatus of this invention. FIG. 5A is a plan view showing a first detection electrode group, and FIG. 5B is a plan view showing a second detection electrode group, showing a detection electrode group according to the coordinate surface projection apparatus of the present invention. It is a top view which shows the other surface of the 1st detection part which concerns on the position detection apparatus of this invention. It is a top view which expands and shows the principal part of the 1st detection part which concerns on the position detection apparatus of this invention. It is a block block diagram for demonstrating the structure and operation | movement of a 2nd detection part which concern on the position detection apparatus of this invention. It is explanatory drawing which shows typically the state which overlap | superposed the detection electrode on the loop coil which concerns on the 2nd detection part of this invention. It is a top view which shows other embodiment of the detection electrode which concerns on the position detection apparatus of this invention. It is a top view which shows another example of embodiment of the detection electrode which concerns on the position detection apparatus of this invention. It is explanatory drawing which shows typically the detection part of the conventional electrostatic capacitance system. It is explanatory drawing which shows typically the conventional position detection apparatus which piled up the 1st detection part of an electrostatic capacitance type, and the 2nd detection part of an electromagnetic induction system.
DESCRIPTION OF SYMBOLS 1 ... Position detection apparatus, 2 ... Position indicator, 4 ... Input part, 5 ... Housing | casing, 6 ... Opening part, 13 ... 1st detection part, 14 ... 2nd detection part, 15, 35, 45 ... detection Electrode, 16A: First detection electrode group, 16B: Second detection electrode group, 18: Connection unit, 19, 39, 49 ... Slit, 22 ... Capacitance measurement unit, 23 ... Electromagnetic induction detection unit, 24 ... Loop coil 27 ... Coil G ... Magnetic flux
A first detection unit based on a capacitance method for detecting a position indicated by an indicator;
A second detector by an electromagnetic induction method for detecting a position indicated by the position indicator by receiving a magnetic flux generated by a coil provided in the position indicator ;
The first detection unit and the second detection unit are superimposed so that the first detection unit is disposed between the position indicated by the position indicator and the second detection unit ,
In the first detection unit, a plurality of electrodes arranged in a first direction and a plurality of electrodes arranged in a second direction intersecting the first direction are arranged close to each other,
The plurality of electrodes arranged in the first direction and the plurality of electrodes arranged in the second direction are electrically connected to each other,
By providing a slit in each of the plurality of electrodes provided in the first direction and the second direction of the first detection unit, eddy currents generated in the plurality of electrodes are minimized, and the position indication is performed. the magnetic flux generated by a coil provided in the vessel at the time of receiving said second detection section, and so as to reduce the loss of eddy current due to the magnetic flux, the position detecting device.
The position detection device according to claim 1, wherein the plurality of electrodes used in the first direction and the second direction of the first detection unit are circular or polygonal.
The position detection device according to claim 2, wherein the plurality of electrodes includes a triangular electrode disposed on an outer periphery of the detection region and a quadrangular electrode disposed on the other detection region.
One end of the slit provided in the plurality of electrodes is located at an outer edge of the plurality of electrodes, and the slit extends inward from the outer edge of the plurality of electrodes. The position detection apparatus in any one of .
When detection of a change in capacitance by the first detection unit and detection of magnetic flux by the second detection unit are performed at the same time, the processing by the second detection unit is preferentially performed. The position detection device according to claim 1, wherein
JP2007340099A 2007-12-28 2007-12-28 Position detection device Active JP5094376B2 (en)
JP2007340099A JP5094376B2 (en) 2007-12-28 2007-12-28 Position detection device
TW97148025A TWI423085B (en) 2007-12-28 2008-12-10 Position detection device
KR1020080128525A KR101147020B1 (en) 2007-12-28 2008-12-17 Position detecting device
EP08022437.1A EP2077489B1 (en) 2007-12-28 2008-12-23 Position detecting device
IL196180A IL196180A (en) 2007-12-28 2008-12-25 Position detecting device
CN2008101895189A CN101470562B (en) 2007-12-28 2008-12-29 Position detecting device
US12/345,582 US8228312B2 (en) 2007-12-28 2008-12-29 Position detecting device
JP2009162538A JP2009162538A (en) 2009-07-23
JP2009162538A5 JP2009162538A5 (en) 2010-09-09
JP5094376B2 true JP5094376B2 (en) 2012-12-12
ID=40427113
JP2007340099A Active JP5094376B2 (en) 2007-12-28 2007-12-28 Position detection device
US (1) US8228312B2 (en)
EP (1) EP2077489B1 (en)
JP (1) JP5094376B2 (en)
KR (1) KR101147020B1 (en)
CN (1) CN101470562B (en)
IL (1) IL196180A (en)
TW (1) TWI423085B (en)
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