JPH09179679A - Electrostatic capacity type tablet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrostatic capacity type tablet inexpensively constituted of the small number of parts though it has many detection parts. SOLUTION: The tablet has a detection board 1 constituted of plural row electrodes 2, 3,... including plural 1st electrode parts 2a, 2b,..., plural column electrodes 5, 6,... including plural 2nd electrode parts 5a, 5b,... and a counter electrode 8 opposed to the row and column electrodes, an electrostatic capacity detection circuit 9 for detecting a change in electrostatic capacity among the row electrodes, the column electrodes and the counter electrode 8 and a judging means 11 for judging which electrode out of plural row and column electrodes changes its electrostatic capacity in accordance with an output signal from the circuit 9. Plural detection parts Kaa, Kab,... each of which consists of the counter electrode 8, one of the 1st electrode parts and one of the 2nd electrode parts are constituted like a matrix and the means 11 decides which detection part out of the plural detection parts changes its electrostatic capacity in accordance with the output signal of the circuit 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information input device for inputting information to a personal computer, a game machine or the like, and more specifically, it has a plurality of detecting portions arranged in a matrix, and the detecting portion can be provided by a hand or a light pen. The present invention relates to an improvement in a capacitance type tablet that detects which one of a plurality of detection units is selected by touching.

[0002]

2. Description of the Related Art Conventionally, there has been a detector that uses an electrostatic sensor for detecting a change in electrostatic capacity in a detection portion constituting a tablet. As a first example, 4 of transparent electrodes with uniform surface resistance
There is an arrangement in which electrodes are arranged in the corners and the capacitance changes when a finger touches the transparent electrode, and the magnitude of the current flowing from the four electrodes differs due to the difference in the position.

As a second example, a plurality of electrodes of an electrostatic sensor are formed on a printed circuit board, and a circuit for detecting a change in electrostatic capacity is attached to each electrode to form a plurality of proximity switches. There is a device that obtains an off signal.

[0004]

SUMMARY OF THE INVENTION In the first conventional example,
Peripheral circuits such as the circuit for detecting the difference in current are complicated and costly, and are suitable for relatively large tablets, but are not suitable for joysticks of game machines or input devices for simple input. The second example is suitable for applications in which a small number of signals can be obtained, such as a mouse, a trackball, and a joystick, but when the number of electrodes increases, it becomes difficult to draw out the lead wires of the electrodes, and it is also necessary to keep each electrode static. Since it is necessary to provide a capacitance detector, the circuit scale becomes large, so it is difficult to use it for a multi-input tablet for character input.

[0005]

In order to solve the above problems, the present invention has a plurality of first electrode portions and a plurality of row electrodes arranged in one direction, and a plurality of second electrode portions. A proximity switch that has a plurality of row electrodes and a plurality of column electrodes arranged so as to intersect in a grid pattern, and detects a change in the capacitance between the row electrodes and the column electrodes and the counter electrode to turn on the proximity switch. A plurality of detecting portions are formed in a matrix by the first electrode portion, the second electrode portion, and the counter electrode at the intersection, and the capacitance of any one of the plurality of detecting portions changes. To provide a capacitance type tablet that is configured to detect whether or not it is capable of multiple inputs without significantly increasing the circuit scale.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A plurality of row electrodes having a plurality of first electrode portions and arranged in one direction, and a plurality of row electrode portions having a plurality of second electrode portions so as to intersect the plurality of row electrodes in a grid pattern. A plurality of column electrodes arranged in a row, and a detection plate composed of a row electrode and a counter electrode provided at a predetermined interval with respect to the column electrode and facing the row electrode and the column electrode, Capacitance detection circuit that is connected to each of the row and column electrodes and that detects a change in capacitance between the row and column electrodes and the counter electrode and outputs a signal, and the output of the capacitance detection circuit A detection unit that determines which of the plurality of row electrodes and column electrodes has changed its capacitance in response to the signal; and in the detection plate, the first electrode unit and the second electrode unit at the intersection A plurality of detection parts are configured by the electrode part and the counter electrode, and the determination means is capacitance detection. In accordance with the output signal of the road, it is configured to determine the capacitance of any of the detection unit of the plurality of detector that has changed. Preferably, the row electrodes and the column electrodes of the detection plate are arranged side by side or arranged in a laminated state. Preferably, a dielectric material is interposed between the row electrode and the column electrode and the counter electrode. Alternatively, the dielectric material is interposed between the row electrode and the column electrode, between the row electrode and the counter electrode, and between the column electrode and the counter electrode. Preferably, the capacitance detection circuit is a phase comparison type.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention. In FIG. 1, the row electrode 2 includes first electrode portions 2a, 2b and 2c electrically connected to each other, and extends in the lateral direction, that is, the so-called row direction. Row electrodes 3, 4
2 includes the first electrode portions 3a, 3b, 3c and 4a, 4b, 4c, and the row electrodes 2, 3, 4 are arranged in the vertical direction.

The column electrode 5 includes second electrode portions 5a, 5b and 5c electrically connected to each other and extends in the vertical direction, that is, the so-called column direction. The column electrodes 6 and 7 are the same as 5 and each is a second electrode.
The column electrodes 5, 6, 7 including the electrode portions 6a, 6b, 6c and 7a, 7b, 7c are arranged in the lateral direction. Row electrodes 2, 3,
4, the column electrodes 5, 6, 7 intersect in a grid pattern.

The counter electrode 8 is arranged at a predetermined distance from the row electrode and the column electrode, and a capacitance is formed between the row electrode and the column electrode and the counter electrode.

One first electrode portion and one second electrode portion, which are arranged close to each other, that is, at the intersection of the row electrode and the column electrode, form one detection portion Kxy together with the counter electrode. FIG. 4 is a diagram showing the arrangement of the detectors showing the relationship between the suffixes of the rows and columns and the codes of the detector Kxy. Here, x is a suffix (a, b, c) indicating a column in which each of the first electrode portions is located, and y is a suffix (a, b, c) indicating a row in which each of the second electrode portions is located. is there. For example, the detection unit constituted by the first electrode unit 2a and the second electrode unit 5a surrounded by the alternate long and short dash line in FIG. 1 is called a detection unit Kaa. Since the drawing becomes complicated, the reference numerals of the other detectors are shown in FIG.
Although not shown in FIG. 4, as shown in FIG. 4, the detection unit composed of the first electrode unit 3c and the second electrode unit 7b is a detection unit Kc.
b, and the detection unit including the first electrode unit 4a and the second electrode unit 5c is the detection unit Kac.

The detection plate 1 is composed of the row electrodes 2, 3, 4, the column electrodes 5, 6, 7 and the counter electrode 8 described above, and as a result, has nine detection portions Kxy (hereinafter, the detection portions will be collectively referred to as "detection portions"). In this case, it will be referred to as the detecting unit K).

The capacitance detection circuits 9a, 9b, 9c are connected to the row electrodes 2, 3, 4 respectively, and the capacitance detection circuit 9 is connected.
The d, 9e, and 9f are connected to the column electrodes 5, 6, and 7, respectively, and as an example, a phase comparison type electrostatic capacitance detection circuit as shown in FIG. 2 is used. The capacitance detection circuit of FIG. 1 is generically called the capacitance detection circuit 9.

In this embodiment, the capacitance detection circuit 9
Uses a phase comparison type in which the output of the pulse generating circuit is branched into two and the output of each is delayed to perform phase discrimination as disclosed in Japanese Utility Model Publication No. 63-36246. .

The output signal S0 of the pulse generator 10 is connected to the first input terminals of all capacitance detection circuits. In addition, output signals Sn (n = 2 to 2) of each row electrode and column electrode
7) is connected to the second input terminal of each capacitance detection circuit 9.

FIG. 2 is a circuit diagram showing an embodiment of the electrostatic capacitance detection circuit 9. In FIG. 2, each capacitance detection circuit 9
BUN and variable resistor VRA for independent
n, the resistor R1n, and the capacitors C1n and C2n are connected to each other, and the electrostatic capacitance CXn is generated in the row electrode or the column electrode. The combined capacitance of the capacitor C1n and the capacitance CXn is C1Xn. The above n is a value (n corresponding to the output signal Sn (n = 2 to 7) of each row electrode and column electrode.
= 2 to 7) (same below).

Output signal O of D flip-flop FFAn
n is a variable resistance V for the output pulse Pan of the buffer BUn.
The signal Pbn delayed by the first integrating circuit composed of RAn and the electrostatic capacitance C1Xn changes the pulse Pan to the resistance R1n.
When it is ahead of the signal Pcn delayed for a predetermined time by the second integrator circuit including the capacitor C2n, it is low level (hereinafter referred to as L), and when delayed, it is high level (hereinafter referred to as H). Now, when no object is approaching the detection plate 1, the signal P is detected in each capacitance detection circuit 9.
bn is advanced from the signal Pcn, and the signal Pbn is adjusted by the variable resistor VRAn so as to be delayed from the signal Pcn when a finger or the like approaches the detection plate 1. That is, in the initial state, since no object is approaching the detection plate 1, the signals On are all L.

The judging means 11 examines the output levels of the output signals O2 to O7 of the respective capacitance detecting circuits 9 to determine which one of the nine detectors Kaa to Kcc has changed in capacitance. It is determined and the signal SG is output. The signal SG may be, for example, a 4- to 5-bit binary signal.

Next, the structure of the detection plate 1 of this embodiment will be described with reference to FIG. FIG. 3A is a partial plan view of the detection plate 1, and a surface BB excluding the plate 30 of FIG. 3B described later.
2 is a diagram of the upper left portion of the detection plate 1 of FIG. 1 in detail. FIG. 3B shows an AA cross section of FIG. Also in the following examples, the relationship between the plan view and the sectional view is the same.

The plate 30 is provided on the detection plate 1 in order to prevent the finger or the like from directly touching each electrode portion and to display the position of the detection portion K. The printed circuit board 39 has a predetermined thickness, and has the first electrode portions of the row electrodes 2 to 4 and the second electrode portions of the column electrodes 5 to 7 on one surface, and the counter electrode 8 on the other surface. . As mentioned above, 2
a, 2b, 3a, 3b are first electrode portions, and 5a, 5
Reference numerals b, 6a and 6b are second electrode portions, which are the counter electrode 8 and the detection portion Kaa by the counter electrodes 2a and 5a, the detection portion Kba by 2b and 6a and the detection portion Kba by 3a and 5b.
, And 3b and 6b form a detection unit Kbb. Since the row electrodes and the column electrodes are formed on the same surface, the electrodes 2 of the column electrodes are connected to each other in the areas Ea, Eb, Ec where there is no electrode on the surface of the printed circuit board 30 where the counter electrode is formed. Conduction is established by the through-holes H, H, ... Provided in the working patterns La, Lb, Lc and the projecting portions of the electrode portions 5a, 5b, 6a, 6b.

With the above structure, each row electrode and each column electrode face the counter electrode 8 with a predetermined area and a predetermined distance with the dielectric material of the printed circuit board 39 sandwiched therebetween, so that the respective electrodes have substantially the same capacitance ( CXn) in FIG. 2 occurs.

Next, the operation will be described. When the detection unit Kaa on the plate of the detection plate 1 of FIG. 3 is touched with a finger, for example, the electrostatic capacitance between the first electrode unit 2a and the counter electrode 8 increases, and also between the second electrode unit 5a and the counter electrode 8. Also increases, so the total capacitance CX2 of the row electrode 2a and the total capacitance CX5 of the column electrode 5a increase. As a result, the capacitance C1X2 of FIG. 2 increases, so that the signal Pb2
Is delayed from the signal Pc2, the flip-flop FFA
The output signal O2 of 2 changes from L to H. Similarly, since the capacitance C1X5 of FIG. 2 increases and the signal Pb5 lags behind the signal Pc5, the output signal O5 of the flip-flop FFA5 also changes from L to H. Judgment means 1 of FIG.
1 detects that the output signal O2 of the electrostatic capacity detection circuit 9a and the output signal O5 of the electrostatic capacity detection circuit 9d have become H, and judges that the electrostatic capacity of the detection unit Kaa has changed, and The output signal SG is changed to a predetermined value.

Similarly, when the area of the detecting portion Kbb is touched with a finger, the capacitances of the signals S3 and S6 increase, and the output signal O3 of the capacitance detecting circuit 9b and the capacitance detecting circuit are increased. Detecting that the output signal O6 of 9e has become H, it is determined that the capacitance of the detection unit Kbb has changed, and the output signal SG is changed.

The shapes of the first electrode portion and the second electrode portion may be complicated shapes that enter the respective regions. That is, the second embodiment of the present invention shown in FIG. 5 is different from the first embodiment in that the shapes of the first electrode portion and the second electrode portion constituting the detection portion are changed. 2 electrode part 56a
Is formed in a comb shape so that even if the finger touching the detection portion is slightly displaced, the capacitance of both electrode portions can be surely changed.

Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the structure of the detection plate 1 is changed from that of the first embodiment. Like FIG. 3, FIG. 6 shows the detection plate 1 of FIG.
3 is a detailed drawing of the upper left part of FIG. 6A is a cross-sectional view of the detection plate 61 as seen from the BB plane, and FIG. 6B is a cross-sectional view taken along AA. In FIG. 6, the row electrodes 62 and 63 are respectively the first
Electrode portions 62a, 62b, ... And 63a, 63b,
, And is formed on one surface of the substrate 69a.

The column electrodes 65 and 66 are the second electrode portions 6 respectively.
5a, 65b, ... And 66a, 66b, ... And are formed on the intermediate surface between the substrate 69a and the substrate 69b. The first electrode portions 62a, 62b, 63a, 63b ...
Are the second electrode portions 65a, 65b, 66a, 6 respectively.
6b ...
62ba, 63aa, 63ba ... Are provided. The counter electrode 68 is formed on the surface of the substrate 69b. As the substrates 69a and 69b, the substrate 69a may be a double-sided substrate in which the first electrode portion and the second electrode portion are provided on opposite sides, and the substrate 69b is a single-sided substrate provided with a counter electrode, which may be bonded to each other. The first electrode part, the second electrode part,
You may comprise using the board | substrate of 3 layers which has a counter electrode on one side, respectively. Similar to the first embodiment, the first electrode portion and the second electrode portion
Nine detection units Kaa to Kcc as shown in FIG. 4 are configured by combining the electrode units. For example, the electrode portion 62a
The electrode section 65a and the counter electrode 68 form a detection section Kaa. Also in the above configuration, capacitance is generated between each first electrode portion and the counter electrode or between each second electrode portion and the counter electrode, and its size is changed by bringing a finger or the like close to or touching each detection portion. In this case, since the first electrode portion is provided on the surface of the detection plate, the change in capacitance when a finger approaches is larger than that of the second electrode portion. The portions are arranged in the center so that the capacitance can be surely changed in both electrode portions when a finger touches the center of the detection portion. The operation is the same as in the first embodiment, and will be omitted.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, the structure of the detection plate 1 is changed from that of the first embodiment. Like FIG. 6, FIG. 7 shows the detection plate 1 of FIG.
6 is a detailed drawing of the upper left part of FIG. In FIG. 7, the row electrode 7
2, 73 are first electrode portions 72a, 72b, ...
And 73a, 73b, ..., And is configured on one surface of the substrate 79a. The column electrodes 75 and 76 have second electrode portions 75a, 75b, ... And 76a, 76, respectively.
., and is formed on the intermediate surface between the substrate 79a and the substrate 79b. First electrode parts 72a, 72b, 73
a, 73b ... are the second electrode portions 75a, 75, respectively.
b, 76a, 76b ... The area is smaller than that of b, 76a, 76b.

Similar to the first embodiment, by combining the first electrode portion and the second electrode portion, nine detecting portions K as shown in FIG. 4 are obtained.
aa to Kcc are configured. For example, the electrode 62a, the electrode 65a, and the counter electrode 68 form a detection unit Kaa. Also in the above configuration, capacitance is generated between each first electrode portion and the counter electrode or between each second electrode portion and the counter electrode, and its size is changed by bringing a finger or the like close to or touching each detection portion. In this case, since the first electrode portion is provided on the surface of the detection plate, the change in capacitance when a finger approaches is larger than that of the second electrode portion. Therefore, the area of the first electrode portion is set to the second electrode portion. By arranging the first electrode part so that it is sufficiently smaller than the area, and arranging the first electrode part so as to be displaced from the center, it is possible to ensure that the capacitance changes in both electrode parts when a finger touches the center of the detection part. ing. The operation is the same as in the first embodiment, and will be omitted.

Next, a fifth embodiment of the present invention will be described with reference to FIG. In this embodiment, the structure of the detection plate 1 is changed from that of the first embodiment, and the same symbols as those in FIG. 7 represent the same components. In FIG. 8, the row electrodes 82 and 83 are respectively the first electrode portions 82a, 82b, ... And 83a, 83b ,.
., And is formed on one surface of the substrate 79a.
The column electrodes 85 and 86 are the second electrode portions 85a and 85, respectively.
, and 86a, 86b, ..., and are formed on an intermediate surface between the substrates 79a and 79b. First
The electrode portions 82a, 82b, 83a, 83b ... Have a smaller area than the second electrode portions 85a, 85b, 86a, 86b .. No electrode 85 in the area facing the
aa, 85ba, 86aa, 86ba ... Are provided.

Similar to the first embodiment, by combining the first electrode portion and the second electrode portion, there are nine detection portions K as shown in FIG.
aa to Kcc are configured. Also in the above configuration, each first
Capacitance is generated between the electrode portion and the counter electrode or between each second electrode portion and the counter electrode, and its size is changed by bringing a finger or the like close to or touching each detection portion. In this example, since no electrode is formed in the region (85aa) of the second electrode portion (for example, 85a) facing the first electrode portion (82a), the influence on the row electrode should be made smaller than that in the fourth embodiment. You can Next, a sixth embodiment of the present invention will be described with reference to FIGS.
1 will be described. FIG. 9 is a block diagram similar to FIG. 1, and the same reference numerals as those in FIG. 1 represent the same elements. In FIG. 1, each of the capacitance detection circuits 9a to 9f has a resistor R1.
Although a second integrating circuit composed of n and C2n is included, this embodiment is intended to reduce the number of parts in this portion.

The capacitance detection circuit 99 (99a-9a) of FIG.
9f) has the circuit configuration shown in FIG. 10, and has a third input terminal Pn (n = 2 to 7). 1st, 2nd
The input terminals of are the same as those described in FIG. The delay circuit 91 of FIG. 9 is for generating the signal Pc0 which is obtained by delaying the output signal S0 of the pulse generation circuit 10 for a predetermined time, and FIG. 11 shows the circuit configuration. In FIG. 11, the buffer BUA is for separating the signal S0 from the input terminal of each capacitance detection circuit 99. The buffer BUB is for generating a signal Pc0 obtained by delaying the signal S0 by a predetermined time by an integrating circuit including a variable resistor VRB and a capacitor C3. The signal Pc0 is connected to the Pn terminal of each capacitance detection circuit 99.

Similar to FIG. 1, flip-flop FFAn
Of the output signal Pan of the buffer BUn
Is delayed by the first integrator circuit including the variable resistor VRAn and the electrostatic capacitance C1Xn.
If it is ahead of the output signal Pc0, it becomes L, and if it is behind, it becomes H. Now, when no object is approaching the detection plate 1, the signal Pbn is advanced from the signal Pc0 in each capacitance detection circuit 99, and the detection plate 1 is detected.
When the finger or the like approaches the variable resistances VRan and VR, the signal Pbn is delayed from the signal Pc0.
Adjusted by B.

The operation for detecting which of the detecting units has changed its capacitance is the same as that of the first embodiment, and therefore its explanation is omitted.

According to the above construction, since it is not necessary to have the second integration circuit in each capacitance detection circuit 99 when the number of detection units K increases, the number of parts can be reduced, and an inexpensive tablet can be obtained. It is configurable.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the first embodiment, as shown in FIG. 3, a distance w1 between the first electrode portion and the second electrode portion, which constitutes each detection portion, for example, the electrode portion 2a and the electrode portion 5a, and a distance between the adjacent detection portion, for example, Although the size of the interval w2 between the electrode part 5a and the electrode part 3a is different, the size may be the same.

Further, in FIG. 1 of the first embodiment, the determination means 11 touches the fingers between the detection portions, for example, across the second electrode portion 5a and the first electrode portion 3a, and the electrostatic charges of the signals S3 and S5. It is detected that the capacitance has increased and the output signal O3 of the electrostatic capacitance detection circuit 9b and the output signal O5 of the electrostatic capacitance detection circuit 9d have become H to detect the middle of the rows of the detection unit Kaa and the detection unit Kab. Different signals may be output by determining that the capacitance has changed in the part.

Further, in FIG. 1 of the first embodiment, if only one of the outputs O2 to O7 of the capacitance determination circuit becomes H, the detection unit cannot be specified. The determination means 11 may output a predetermined warning signal to the signal SG in order to inform the user.

Further, in the above embodiment, the number of row electrodes and the number of column electrodes are three in order to simplify the description, but the number may be any number. Assuming that the number of row electrodes is g and the number of column electrodes is r, the number M of detection units configured is M = g × r, and the required number Z of capacitance detection circuits is Z = g + r.
For example, when a tablet having 20 detection units is configured, 20 capacitance detection circuits are required in the conventional method, but according to the present invention, by setting g = 4 and R = 5, for example, Z = 4 + 5 = 9, that is, the number of capacitance detection circuits is nine.

In the above embodiment, the first electrode portion and the second electrode portion are shown as rectangular or circular, but this shape may be arbitrary.
Each electrode portion may be configured as a set of small electrodes connected to each other, or may have a mesh shape. Further, each electrode part may be composed of a single-layer or multi-layer printed circuit board, or a structure in which a plate made of a dielectric material having a predetermined dielectric constant is inserted between electrodes made of a metal plate. Good.

In the above embodiments, the row electrodes and the column electrodes are orthogonal linear electrode groups, but the present invention is not limited to this, and the rows and columns of the electrodes may be arranged at an arbitrary angle, such as an arc shape. May be arranged in a curved line.

[0040]

According to the present invention, the detection plate has a plurality of detection portions, each of which is composed of a part of the row electrodes and a part of the column electrodes, arranged in a matrix and is connected to the row electrodes and the column electrodes. According to the output signal of the capacitance detection circuit, it is configured to determine which of the plurality of detection units has been selected, so even if the number of detection units increases, the lead wire from each electrode Since the number of drawers is small and the configuration is simple, and therefore the configuration of the capacitance detection circuit can be simplified, an inexpensive capacitance type tablet can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a circuit diagram showing a capacitance detection circuit of the above.

FIG. 3 is a diagram showing a configuration of a detection plate of the above.

FIG. 4 is a diagram showing an arrangement of detection units of the above.

FIG. 5 is a diagram showing a shape of an electrode of a detection unit according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of a detection plate according to a third embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a detection plate according to a fourth embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a detection plate according to a fifth embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a sixth exemplary embodiment of the present invention.

FIG. 10 is a circuit diagram of a capacitance detection circuit of the above.

FIG. 11 is a circuit diagram of the above delay circuit.

[Explanation of symbols]

1, 61, 71, 81 Detection plates 2, 3, 4 Row electrodes 5, 6, 7 Column electrodes 2a-2c, 3a-3c, 4a-4c 1st electrode part 5a-5c, 6a-6c, 7a-7c No. 2 electrode parts 8 and 68 counter electrode 9 (9a-9f) electrostatic capacitance detection circuit 99 (99a-99f) electrostatic capacitance detection circuit 11 determination means

Claims (6)

[Claims] 1. A plurality of row electrodes having a plurality of first electrode portions and arranged in one direction, and a plurality of second electrode portions so as to intersect with the plurality of row electrodes in a grid pattern. A detection plate composed of a plurality of column electrodes arranged and a counter electrode provided at a predetermined distance from the row electrode and the column electrode and facing the row electrode and the column electrode. A capacitance detection circuit that is connected to each of the row electrodes and column electrodes and that detects a change in capacitance between the row electrodes and column electrodes and a counter electrode and outputs a signal; According to the output signal of the detection circuit, the plurality of row electrodes and column electrodes, having a determination means for determining which electrode capacitance has changed, the detection plate, the intersection of the intersection Detection by the first electrode portion, the second electrode portion, and the counter electrode A plurality of units, and the determination unit is configured to determine which of the plurality of detection units the capacitance has changed according to the output signal of the capacitance detection circuit. Capacitive tablet that is characterized. 2. The electrostatic capacity type tablet according to claim 1, wherein the row electrode and the column electrode are arranged side by side. 3. The capacitance type tablet according to claim 1, wherein a dielectric material is interposed between the row electrode and the column electrode and the counter electrode. 4. The electrostatic capacity type tablet according to claim 1, wherein the row electrodes and the column electrodes are arranged in a stacked state. 5. The dielectric material according to claim 1, wherein a dielectric material is interposed between the row electrode and the column electrode, between the row electrode and the counter electrode, and between the column electrode and the counter electrode. Characteristic capacitive tablet. 6. The capacitance type tablet according to claim 1, wherein the capacitance detection circuit is a phase comparison type.