JPS62187925A - Position detector - Google Patents

Abstract

PURPOSE:To prevent a position detector from the generation of malfunction by canceling a signal due to hand touch, out of detecting signals of a vibration unit. CONSTITUTION:An I/O panel 1 is constituted of a touch panel 40 consisting of a vibration detecting unit 30 and a conductive plate arranged on a tablet 10 through a shielding plate 20. When the touch panel 40 is depressed by a magnetic generator 3, the interval between the 1st and 2nd plate materials 31, 32 constituting the unit 30 is changed, stress due to a projection part is applied to a vibration sensor and a signal is outputted. Since the plate materials 31, 32 are similarly vibrated by external vibration, the change of the interval is not generated and no signal is extracted. On the other hand, hand touch is detected from the touch panel 40 and a signal extracted from the vibration generated in the unit 30 at the time of hand touch is canceled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a position detection device capable of detecting coordinate values on a tablet indicated by a magnetic generator.

(Prior Art) In a conventional position detection device of this type, the input coordinate position on the tablet is 1J! As a means of specifying only the cover,
It is known that a position indicator is provided with a switch means and configured to send a timing signal when the switch means is turned on (or off) to a control device via a code or by using ultrasonic waves or infrared rays. There is. In addition, as another means C, a vibration sensor is provided on the human power surface, and the vibration that occurs when the position indicator is moved on the input surface is detected, and this is made into a timing signal and is configured to be sent to the control device 11. It is known that there is one.

(Problems to be Solved by the Invention) However, in the case where the timing signal is sent from the position indicator via a code, the code impairs the operability of the position indicator. The transmitter C must be equipped with these transmitters, signal generation circuits, batteries, etc. in the position indicator, which makes the configuration complicated and expensive, and it is also large and heavy. Operability deteriorates. In addition, b using a vibration sensor
In this case, the timing signal cannot be obtained unless the position indicator is moved on the input surface, and for example, it is not possible to manually input the coordinates of one point, and when inputting handwritten characters, the direction changes significantly midway. If one stroke is recognized as two (or more than three) strokes, and if the moving speed of the position indicator becomes slow, the frequency of vibration becomes lower and the size of the signal becomes smaller, so it can be used over a wide range. It is not possible to start the position indicator at a speed of 300 degrees, and it is also not possible to layer thick paper or the like to absorb vibrations, making it easy to malfunction due to vibrations from the outside.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a position detection device that detects a position on a tablet specified by a magnetic generator that generates a steady magnetic field. The first board is about the same size as the one on which the vibration sensor is installed, and the first board is about the same size as the tablet.
and a second plate member provided with a protrusion that presses the vibration sensor on one surface, and the vibration sensor and the protrusion are placed on the 7th floor.
7 fixed on top of each other, fixed to each other only at the - side and the other side opposite to it, and fixed to each other only on the other side opposite to this, with a vibration detection unit of t and a size almost the same as that of the tablet. A touch panel that senses contact; the touch panel detects the point in time when a hand touches the touch panel, and the output signal t'yl of the vibration sensor is used to detect the point in time when a magnetic generator or the like comes into contact with the first or second plate material, or when the magnetic generator or the like comes into contact with the first or second plate material. Detect the point in time when
A control circuit that generates a timing signal corresponding to the period during which the magnetic generator is in contact with the first or second plate material is provided, and the vibration detection unit is stacked on top of the tablet, and the vibration detection unit A touch panel was fixed on top.

(Function) According to the present invention, when the plate material above the vibration detection unit is suppressed by the magnetic generator or when this pressing force is removed,
When the distance between the first plate and the second plate changes, stress on the protrusion is applied to the vibration sensor and a signal is output, so when the magnetic generator etc. contacts the plate above the unit. It is possible to detect a time point away from J3, and on the other hand, when a single movement from the outside is applied, the first plate material and the second plate material
Since it vibrates in four different ways, there is no change in the interval, and therefore no signal is extracted.In addition, the touch panel detects the touch of the hand, and when the touch panel makes contact, the signal is extracted from the vibration generated in the vibration detection unit. No. 13 can be converted into a toyan cell, and the timing signal corresponding to the period when the magnetic generator is in contact with the upper plate can be correctly extracted.

(Example) Figure 1 shows the basic configuration of the present invention.
2 is an input/output panel, 2 is a υ1111 device, 3 is a magnetic generator for position designation, and 4 is a power supply device C.

As shown in FIGS. 1 and 2, the input/output cover panel 1 is provided with a vibration detection unit 30 and a touch panel, such as a conductive plate 40, on the tablet 10 via a shield plate 20.
are mounted, and these are housed integrally in a case 50 made of non-magnetic metal.

The fl, II control device 2 includes a tablet control circuit 5 for controlling the tablet 10, a timing 'a-control circuit 6 for extracting timing signals from signals from the vibration detection unit 30 and the conductive plate 40, as shown in FIG. and an electronic Wt 017 that centrally controls them.

IΩii! The I-designated magnetic FFI 4+ device (hereinafter referred to as the input pen) 3 has a pen shaft 301 made of synthetic resin and a pen holder 303 housed at one end 302 with a tapered tip as shown in FIG. has been done. In addition, a protective cover 304 made of plastic or the like is attached to the tip of the magnetic bar 71'1303.
IlJ is being done.

The power supply device 4 is a well-known rectifier or transformer, 1]C-1)
Consisting of a C converter, etc., the necessary power is controlled by the control device 2.
Supplies each circuit within.

FIG. 5 is a plan view showing the structure of the tablet 10, and FIG. 6 is a sectional view taken along the line Vl--Vl in FIG. In the figure, 11
are magnetostrictive transmission media, and a plurality of magnetostrictive transmission media are arranged substantially parallel to each other in the X direction and the Y direction. Magnetostrictive transmission medium 1
1 can be any ferromagnetic material, but in order to generate strong magnetostrictive vibration waves, a material with a large magnetostrictive effect, such as an amorphous alloy containing a large amount of iron, is particularly desirable. Further, it is preferable to use a material with a small coercive force that is difficult to magnetize even when a magnet is brought close to the material. Examples of amorphous alloys include Fe61Co
B S+ (atomic %),” 081B13.5
SiC (atomic %) or the like can be used. Magnetostriction transmission 3.52 The delivery medium 11 has an elongated shape, and its fragment is long IJ.
If the shape is a thin strip or a circular line is 1p, if it is a thin strip,
The width is about a few feet, and the thickness is about several μm to several tens of μm.
It is easy to construct and has good characteristics. Amorphous alloys! Due to the construction of lJ, a thin one with a thickness of 20 to 50 μm can be made, so it is sufficient to cut this into a thin plate shape or a linear shape. In this embodiment, a magnetostrictive transmission medium made of e81B13.53iC (atomic %) and having a width of 2 tm and a thickness of 3.52 0.02 as+ is used.

Reference numeral 12 denotes an elongated cylindrical reinforcing member made of synthetic resin or the like, and each of the two front magnetostrictive transmission media 11 is accommodated therein.

Reference numeral 13 denotes a first coil in the Y direction, which is disposed on the reinforcing member 12 at one end of the magnetostrictive transmission medium 11 disposed in the X direction. This X-direction first coil 13 is twisted between adjacent reinforcements 4412 and wound in the opposite direction around the magnetostrictive transmission medium IHa, which is used as an adjacent reinforcement 4412, so that when current is passed through the coil 13, each ! i) When a magnetic flux generated from a portion corresponding to the magnetostrictive transmission medium 1 or a magnetic flux in one direction is applied to the coil 13, the voltage generated in each portion is in the opposite direction.

Therefore, pulse noise and external induction generated when a pulse current is passed through the coil 13 are weakened by canceling each other out between adjacent portions of the coil 13. In addition,
Although the number of turns is one in the illustrated example, it may be wound two or more times. This X-direction first coil 13 is for generating an instantaneous magnetic field fluctuation to avoid generating magnetostrictive vibration waves in each winding portion of the magnetostrictive transmission medium 11, and one end of the coil 13 is connected to the tablet control circuit 5. and the other end is grounded.

Further, 14 is a Y-direction first coil disposed on the reinforcing member 12 at one end of the kIa strain transmission medium 11, which is twisted between the adjacent reinforcing members 12, and the magnetostrictive transmission medium adjacent to each other. Every 11th wire is wound in the opposite direction. This Y
One end of the direction first coil 14 is connected to the tablet control circuit 5 similarly to the coil 13, and the other end is grounded. Note that the action is similar to that of the coil 13 and fiil.

15 is a bias magnetic generator, for example, a square magnet;
Direction: Winding of the first coil 13 [! i1 portion J3 J: This is for applying a bias magnetic field parallel to the longitudinal direction to the winding portion of the first coil 14 in the Y direction. The reason for applying the bias magnetic field in this manner is to enable generation of large magnetostrictive vibration waves with a small amount of current, and to specify the generation position of the magnetostrictive vibration waves. That is, the magnetostrictive transmission medium 11
The electromechanical coupling coefficient (a coefficient indicating the conversion efficiency from mechanical energy to electrical energy or from electrical energy to mechanical energy) is maximum at a certain bias magnetic field as shown in Fig. 7, for example. Therefore, by applying such a magnetic bias to the wound portions of the first coil 13 in the X direction and the first coil 14 in the Y direction, magnetostrictive vibration waves can be efficiently generated.

Reference numeral 16 denotes an X-direction second coil disposed on the reinforcement 4412 over a wide range of the magnetostrictive transmission medium 11 arranged in the X-direction e4. The coils 16 are all wound on each magnetostrictive transmission medium 11 in the 1iil -/-i direction (left-handed in this embodiment), and are connected in series so that the polarity of the connection is opposite between adjacent coils. (There is.

Therefore, when Ia flux in one direction is applied to all the coils 16, the electric property and direction of current generated in each fill 16, or the magnetic flux generated in each -1 coil 16 when current is passed through the entire coil 16. Coils that are 1ljl tangent have opposite directions, and JYJ and M sounds from the outside cancel each other out between adjacent coils and are weakened.

The winding pitch of the coil 16 is such that it is wound gradually densely from one end on the side close to the first coil 13 in the X direction to the other end on the opposite side. This compensates for the smaller size. Generally, in order to increase the induced electromotive force, it is preferable that the winding pitch be large.

This X-direction second coil 16 is for detecting the induced voltage due to one wave of IA strain propagating through the magnetostrictive transmission medium 11, and one end is connected to the tablet control circuit 5, and the other end is grounded. The rotated area becomes the position detection T4 area.

Further, reference numeral 17 denotes a Y-direction second
The coils 17 are all wound in the same direction (left-handed in this embodiment) on each magnetostrictive transmission medium 11, and are connected in series so that adjacent coils have opposite polarities. There is. Further, the winding pitch of this coil 17 is such that it is wound gradually more densely from one end on the side close to the first coil 14 in the Y direction toward the other end on the opposite side, and the one end is ni kuburets l-ajl a+
1 circuit 5, and the other end is grounded. It should be noted that the action is 'C' similar to the coil 16.

The above-mentioned X-direction position detecting section includes the X-direction magnetostrictive transmission medium 11, the reinforcing material 12, the X-direction first coil 13, and the X-direction second = first coil 16, and the Y-direction magnetostrictive transmission medium 11 and the reinforcing material. 12, X-direction first coil 14, and X-direction second coil 1
The X-direction position detecting section consisting of 7 and 7 are stacked so as to be orthogonal to each other, housed in the bottom of the case 50, and fixed together with adhesive or the like as necessary. The bias angle magnet 15 is housed and fixed at the bottom of the case 50 so as to face the end of the magnetostrictive transmission medium 11, but the magnetostrictive transmission 'i! i
They may be arranged in parallel above, below, or to the sides of the medium 11.

FIG. 8 is a circuit block diagram showing a schematic configuration of the tablet υ control circuit 5. As shown in FIG. Below, along with a description of each circuit block, the operation of (<lr detection) by the tablet 10 will be described in detail.

Now, the input/output cover panel 1 smells ζ, and the human pen 3 is on the conductor plate 40.
．． X of the tablet 10 through the vibration detection unit 30
Direction Distance I in the X-axis direction from the center of the coil surface of the first coil 13
On the magnetostrictive transmission medium 11 of IIIi11, also on the first
The magnetostrictive transmission medium 11-[ is located at a distance in the Y-axis direction from the center of the coil surface of the coil 14, and magnetism Ia, 15 is applied to the transmission medium 11 to the extent that the electromechanical coupling coefficient becomes large.

When the 7fi slave meter ti17J sends a measurement start command signal to the microprocessor 501 of the tablet control circuit 5, the microphone [1 processor 501 sends a switching signal for selecting x8 selections from among the X and Y switching signals to the multiplexer 5.
02 and 503, X-direction pulse current generation fixed 5
04 and the second coil 16 in the X direction,
The bird applies a pulse to the X-direction pulse current generator 504 through the multiplexer 502, and applies the pulse current to the X-direction first coil 13. The trigger pulse is also applied to a counter 506 via a monostable multi-vibrator (mono-multi) 505, and the counter 506 is reset to indicate that the milling has occurred 3! +07 starts the number of 0 pulses. The pulse repetition frequency of the clock pulse of the U-clock generator 507 is, for example, 100M1-lz.

When the X-direction pulse current v1 generator 504 operates and a pulse current is applied to the X-direction first coil 13, an instantaneous magnetic field fluctuation occurs in the X-direction first film 13, which causes &f
A magnetostrictive vibration wave is generated at the winding portion of the first coil 13 in the X direction of the strain transmission medium 11. This magnetostrictive vibration wave propagates along the longitudinal direction of the magnetostrictive transmission medium 11 at a propagation speed (approximately 5000 m/sec) specific to the magnetostrictive transmission screw 11. During this propagation, the magnetostrictive oscillatory wave is converted from IaVA energy to magnetic energy at the location of the existing magnetostrictive transmission medium 11, depending on the size of the electromechanical coupling coefficient at that location.
A conversion is performed, and therefore an induced electromotive force is generated in the second coil 16 in the X direction.

FIG. 9 illustrates an example of a temporal change in the induced electromotive force generated in the second coil 16 in the XZJ direction, assuming that the time when the pulse current is applied to the first coil 13 in the X direction is 1=0.

As shown in the figure, the amplitude of the induced electromotive force becomes large immediately after time 1=0 and around t1 to t2 seconds after time t, and becomes small at other times.

The amplitude of the induced electromotive force increases immediately after time 1-0 because
X-direction first coil 13 and X-direction second coil 1612S1
This is due to the electromagnetic WA conduction effect at time [-11 to t
The reason why the amplitude of one cycle of induced electromotive force (induced voltage due to magnetostrictive vibration waves) increases in No. 2 is because the magnetostrictive vibration waves generated in the winding portion of the first coil 13 in the X direction propagate through the Ia strain transmission medium 11. This is because the electromechanical coupling coefficient becomes large at that point as it reaches the vicinity directly below the input vent 3.

When the input ben 3 is moved along the longitudinal direction of the magnetostrictive transmission medium, the induced voltage due to the magnetostrictive vibration waves also moves on the time axis accordingly. Therefore, by measuring the time from time t0 to t""tz, the position in the X direction specified by the manual Ben 3, and the distance! 1 can be dedicated. For example, as shown in FIG. 9, the amplitude of the induced voltage due to the strain vibration is equal to the threshold value -El.
It is also possible to use the time point t3, which is smaller, the time point t4, which is larger than the threshold (IIIEl), or the zero cross point t5.

5 in the X-direction second coil 16 mentioned above? ! The induced electromotive force of 1 is sent to the amplifier 508 via the multiplexer 503 and amplified, and further =I comparator (comparator) 509
will be sent to. The comparator 509 calculates the induced electromotive force of Hoko! When the quasi-voltage, for example, the aforementioned threshold (compared with aEl, induced electromotive force)] becomes larger than the threshold E1, that is, when the positive polarity part of the voltage that induces magnetostrictive vibration waves is detected, the counter 50G is set. A stop pulse is sent to stop the counter 506 from counting.

At this time, the counter 506 records the value of the second coil 16 in the X direction from the time when the pulse current was applied to the first coil 13 in the X direction.
A digital value corresponding to the time it takes for an induced voltage to appear due to magnetostrictive vibration waves is obtained. Also, this value is based on the fact that the magnetostrictive vibration waves travel at a speed of 5000 m per second.
By 1 and according to 1. microprocessor 5
01 reads the count value of the counter 506 at this time, that is, the X direction position data.

Next, the microprocessor 501 sends a Y-direction switching signal to the multiplexers 502 and 503, selects the Y-direction pulse current generator 510 and the Y-direction second coil 17, and similarly switches the input ben 3 in the Y-direction. Read position n data.

The X coordinate value and Y coordinate value of the digital values obtained in this way are temporarily stored in the memory in the microbroselli 501 and sent to the electric rometer 7, but the measurement starts. The measurements as described above are repeated while the signal indicating (16 is updated).

The electronic meter 7 sends the X Jj J and Y coordinate values to the timing control circuit 6 and, if necessary, to a display device (not shown) or the like for display.

Furthermore, as will be described later, when a timing signal is sent from the timing control 11 circuit 6, X and Y at that time
Input the coordinate values as specified coordinate values.

In the embodiment described above, the X-direction first coil 13. The first coil 14 in the Y direction is used for generating magnetostrictive vibration waves, and the second coil 16 in the X direction is used for generating magnetostrictive vibration waves. Ta strain the Y-direction second coil 17! Although it is used for detecting the EtflJ wave, it may be used in the opposite manner. In that case, a CVa strain vibration wave will be generated directly under the input vent 3, and an induced voltage will be generated in the second coil 13, 14.

As shown in FIGS. 10 and 11, the vibration detection unit 30 includes first and second plates 31 and 32, and a plurality of (
(here, 12 pieces) swing a center number 33, a plurality of (here, 12 pieces) protrusions 34, and spacers 35a, 35b, 36
It consists of

Plate material 31.32 Beam I is made of an aluminum plate or the like having a size approximately the same as 1-10, and the plate material 31 has 5112 counterbore holes 31a and 4 horizontally, 3 m3 and 4 horizontally. J
: Through-holes 31b of small diameter are bored at approximately equal intervals. Further, on the upper surface of the plate material 31, there is an iM 3 for accommodating lead wires from each counterbore hole 31a to one side to the vibration sensor 33.
1c is provided, and a full 316 holes are provided on the lower surface from each counterbore hole 31a to the other side. Shake #j sensor 33
is a well-known piezoelectric vibrator having a flat disk shape, and outputs a voltage signal according to the magnitude of stress applied to the outside.

The diameter size and depth of the counterbore hole 31a are approximately IFJ.
It is set so as to be able to accommodate the Jt7 server 33. Projection 34
is made of plastic or the like in the shape of a solid rod, and both ends thereof are formed into a flat shape.

The spacers 35a and 35b are made of a slightly flexible material such as soft plastic or hard rubber.
．． 32 or the other side opposite thereto. Also, space I
The slot 36 is made of soft rubber or the like and has a plate shape whose width is as narrow as the spacers 35a and 35b, and has 12 through holes 36a having the same diameter as the counterbore holes 31a, each provided at a corresponding position. There is.

1t each of the above! The motion sensor 33 is located at the counterbore 7L3 of the plate material 31.
Only the periphery of each protrusion 34 is fixed in the interior of the plate 1a with an adhesive or the like, and one end of each protrusion 34 is fixed approximately at the center of each vibration sensor 33, and the other end is fixed to the lower surface of the plate 32 with an adhesive or the like. Ru. Further, the plates 4431 and 32 are fixed with adhesive with spacers 35a and 35b sandwiched between the two sides and the other sides thereof. At this time, the spacer 36 is not fixed but held between the plates 31 and 32. In addition,
each! The ll1i output sensor 33 is connected in a matrix and is connected to the multiplexer of the timing control 11 circuit 6 for 1*i.

Thus, the vibration detection unit 30 is placed and fixed on the shield plate 20 of the tablet 10.

Normally, when nothing touches the plate material 32 and no external vibrations are applied, the vibration sensor 33 does not output anything. As shown in FIG. 12, when the input ben 3 comes into contact with the upper surface of the plate 32, the plate 32 is bent and vibrates, and this deflection and vibration forcefully push the vibration sensor 33 through the protrusion 34. . At this time, since a large stress acts on the vibration sensor 33, a large positive voltage No. 15 is generated. Next, leave the plate material 321. When the human powered Ben 3 is moved, a small positive or fl voltage signal is generated in accordance with the movement. After that, when the input ben 3 is lifted from the plate 4432, the plate 32
The deflection is restored and the vibration is also damped.

At this time, since the large response point i'+if mentioned above is removed from the vibration sensor 33, a large negative voltage signal is generated.

Jj, ffi + J32LtN number (7) pregnant! 11Jt
> fJ33 Jj J: Because it is supported by the protrusion 34, when vibration is applied from the outside, the stress applied to each vibration sensor °33 is dispersed, and any vibration
No voltage signal is generated from the sensor 33 either. In addition, the 12th
In the figure, for the sake of simplicity, #Renri33. Only one protrusion 34 is shown.

The conductor plate 40, as shown in FIGS. 13 and 14,
A plurality of insulating plates 41 made of plastic etc. (16 in this case)
The conductor 42 is made up of several strip-shaped conductors 42. , the substrate 41 has almost the same size as the plates 31 and 32 of the vibration detection unit 30.

The conductor 42 is made of a copper plate or the like with a width of 101IIRF1 degrees,
Near the inner surface 41a of the substrate 41 (between 0.5 and 1),
At a predetermined interval, for example! They are enclosed approximately parallel to the X-axis direction at a distance of about +m. The conductor plate 40 is mounted and fixed on the plate material 32 of the vibration detection knit 30.

Further, each of the front foot conductors 42 is individually connected to a tap detection circuit, which will be described later.

The configuration of the timing control circuit 6 is shown in FIG. In the figure, 601 is a microprocessor, 602 is an address decoder, 603, 604, and 605 are latch circuits, 606, 607, and 608 are multiplex controllers, and 602 is an address decoder.
0'l is differential amplification, 610 is tap detection circuit, 62
There is a 0 timing detection circuit. Here, the 12 pieces (D
Photography + HL? >Dwosoresole 33-1 to 33-12,
Further, 16 conductors are represented as 42-1 to 42-16, respectively.

As mentioned above, the tablet control circuit 5 outputs the electronic if
Through n l 7, the X and Y coordinates of human power Ben 3 1+
ff is Microb l-T l? When the data is sent to the tree GO1, the microprocessor 601 stores the position coordinates of the tablet 10 stored in advance, the positional relationship with each vibration sensor 33-1 to 33-12 of the vibration detection unit 30, and the conductor plate. From the positional relationship with each of the conductors 42-1 to /12-16 of 40, the coordinates of the input ben 3 are 1+ri IJ
Detects a vibration sensor nearby, for example 33-6, and also detects a conductor near the coordinate value A-1 of the input bench 3 (actually, if the hand holding the human-powered bench 3 is on the right side, the conductor is to the right of the coordinate value) , for example 4
2-10 and converts them into data (BCO code) corresponding to the vibration sensor of the vibration detection unit 30 and the position of the conductor of the conductor plate 40, and the latch circuit 603,
604, send to GO5. Note that this data is sent to each wrap circuit by the data bus, but at this time,
Address decoder 602 selectively stores predetermined data in each latch circuit.

The data sent to latch circuits 603, 604 and GOb are sent to multiplexers 60G and GO? , (i
08 r The selected one of the vibration sensors 33-1 to 33-12, that is, 33-6, is transferred to the differential amplifier 6.
09 to the timing detection circuit 620, and a selected one of the conductors 42-1 to 42-16, i.e. 4
2-10 is connected to the timing detection circuit 620 via the tap detection circuit 610.

The tap detection circuit 610 includes a set of CMO8h transistors G11, 012, diode lines 13, 614, resistors 615, 616, and ?M as shown in FIG. 16(a). 1
'C consists of a fixed resistor 617 and a capacitor 618, its input terminal IN is connected to the conductor 42, and its output terminal 011+t is connected to a timing detection circuit 620.

In the above circuit, when the conductor 42 is not touched, 1) Channel 1 - transistor 11 is turned off, N channel 11 channel transistor 612 is turned on, capacitor 618 is discharged, and the state becomes "0".
It is designed to output the low level No. 13 of v.

On the other hand, when a hand touches the conductor 42, Buhei responds as shown in FIG.
), a 50Hl or 60H2 power supply hum is input, and 1 to Ranjistalo 11.612 are turned on alternately with the threshold level as the boundary. When the transistor 611 is on and the transistor 612 is off, the capacitor 618 is charged by the on-resistance (typically 200Ω) of the P-channel transistor 611 and the time constant of the capacitor 618, and the output voltage increases, and the transistor 611 turns off,]
-When Ranjistaro 12 is on, N f-tz channel 1-
Resistor 6 inserted in series with A's low hole of Ranjistaro 12
16 and the time constant due to the capacitor 618], the capacitor 618 slowly discharges, the output terminal 11 falls, and as a result, the high level (rV, o (here 5)) of v
i" Q is output 1".

The configuration of the timing detection circuit 620 is shown in FIG. In the same figure, 621 is a buffer noor amplifier, 622 is an amplifier, 623 and 624 are comparators, and 625 is an RS knob 2.
0 Tsubu, 6213.627 Ltl! 'li band filter (11+'3F), 628 and 629 are AND circuits,
630 is a waveform shaping circuit 11!1, 631 is a medium-stable multiplex circuit, and 632 is a circuit e.

The buffer amplifier G21 converts the output of the vibration sensor 33 into impedance and sends it to the amplifier 622.

Comparators 623 and 624 have input Ben 3 connected to board JtA3.
2 (strictly speaking, the conductor plate 40), it detects that it is 111 from J3 and the plate material 32, and amplification:! ! The output voltage of 1622 is compared with the predetermined threshold voltages v, 11 and -v111, respectively, and the comparator 623 outputs a high level signal when it is larger than the voltage (ft voltage vT11), and the comparator 624 outputs a high level signal when the voltage is higher than the threshold voltage vT11. ,,
, J, outputs a high level signal when it is small, and outputs a signal at LD- level at other times. Also, for comparison, the output signals of 5623 and 624 are from the AND circuit 62B.

629, it is sent to the cell I input and reset input of the RS flip 1 knob 625 via the OR circuit 632.

The output of the RS flip 70 knob 625 is output during the period when the input ben 3 is in contact with the vibration detection unit 30 (, No. 1 (
Hereinafter, it will be referred to as the Bendaun Ie. ) and C electrons 111 are sent to 117.

The high-pass filter 626t has a frequency of 817 and 1501-11, which eliminates the influence of low frequency vibrations generated by the vibration detection unit 30 when the input valve 3 contacts the plate 32. .

In addition, the high-pass filter 027 has a cutoff frequency of 50 Hz, and the input ben 3 is moving, but the stroke is - Even if the output voltage exceeds 1.1 or 11 due to a large change in the current, it is recognized that the input bend 3 is moving by the vibration blindness of 50i (2 or more), and the pen is brought down. This is to prevent the signal from turning off.

Furthermore, the monostable multivibrator 631 transmits the output signal of the touch detection circuit 610 described above to the multi-L plexer 608.
The receiving GJ generates a pulse signal with a predetermined time width (for example, about 0.5 seconds) via the waveform shaping circuit 630, and outputs it to the A circuit 6.
Sent on 32nd. When the hand touches the plate 32 (fI & conductor plate 40) from a state where the hand is completely away from the plate 32, the same result occurs as when the input ben 3 contacts the plate 32.
17 or more vibrations may occur, and in order to prevent the pen down signal from turning on, the flip 70 knob 625 should not be turned on for the predetermined time from the time when the hand touches the conductor plate/IO. is doing.

The hand holding the input ben 3 is connected to the aforementioned conductor 42 on the conductor plate 40.
-101-J, and further near the vibration sensor 33-6, push the tip of the input ben 3 onto the top surface of the conductor plate 40 to input, for example, a handwritten character, and then When 3 is lifted, a high level signal is obtained in the touch detection circuit 610 corresponding to the conductor 42-10, and a low voltage 33 Ifiqrr is generated from the vibration sensor 433-6 at 6.

The high level signal is input to the τ waveform shaping circuit 630 via the multiplexer 608, where it is shown in FIG. 18(a).
) is waveform-shaped into a signal as shown in 1° and sent to a monostable multiplexer 631. Monostable multiplexer G
311 is activated at the rising edge of (tj>"SA) and emits a signal 8 with a time width of 0.5 seconds.

On the other hand, the voltage signal from the 01 Shinri 33-6 is sent to the buffer amplifier 621 via the differential amplifier 609, where the impedance is converted, and the voltage signal is amplified by the amplifier 622. It is converted into signal C.

The signal C is compared with the threshold type JE V ru in the comparator 623, and compared with the dark value voltage -■Tll in the comparator 624, but the positive peak 01 in No. 16 C indicates that the hand is a conductor. 0) which touched the plate 40, and the beak C
2 connects the input ben 3 to the conductor plate 40, that is, the vibration detection unit 3.
This is the signal when pressed () to 0, and both Ia value voltage vT
Since the comparator 623 is larger than 11", the output from the comparator 623 is
) shows J, eel pulse transmission D1. D2 is output.

Also, the beak C3 of the mouth in the signal C is a threshold type at No. 13 when the input ben 3 is 14-higher than the conductor plate 40! ,t-V
When I is smaller than i++ by 8, the comparator 624 outputs a pulse signal E as shown in FIG. 18(C).

The pulse signal D1. D2 is sent to the set input of the flip knob 625 via the AND circuit 628, but since the pulse signal 13 is sent to the reset input of the flip knob 7625 via the A circuit 632, the pulse signal 1) It is not set at 1, and the pulse (ΔD
Pit due to 2. Further, the pulse signal E is sent to the reset input corner of the flip-flop 1" knob 625 via the AND circuit G29 and the 7I circuit 632, and is sent to the reset input corner of the flip-flop 1" knob 625.
The pen down signal 1: as shown in Figure 8 () is turned blue.

In addition, due to the difference in response between the knit 30 and the four-body plate 40, the pulse signal B is
If there is a risk that unnecessary 02
) may be used to prevent the flip-flop 625 from operating.

The bent down signal is electronic,? The electronic Ctti machine 7 side recognizes all the XJj and Y coordinate values sent from the tablet control circuit 5 as specified coordinate values while the pen down signal F is at a high level.

When inputting a figure so large that the conductor in contact with the hand holding the input pen 3 changes, the conductors 42-1 to 42-
The output of the IG will be switched and output, but in this case, the hand usually moves while touching the conductor plate 40, so the output of the multi-branch 608 is always at a high level, and therefore, in the middle of the movement, The signal B is never generated.

I moved the input ben 3! If the conductor plate 40 is moved up and down at a certain point, the electronic meter 01 is sent from the control circuit 5 to the tablet 1.
The coordinate value sent to 7 will be a value of -., and it is also possible to input one specified coordinate value.

In addition, this unspecified ta value can be used as it is, or after being processed by a predetermined program processing PP, in the same manner as above for the display device. 7 can also be displayed.

FIG. 19 shows another example of the tablet. A shield plate 71 is attached to the tablet 70 from above as shown in the figure.
0a1 magnetic plates 720a, 720b.

Conductor plates 730a, 730b, magnetic plate 720c
, 720d.

Conductor plates 730G, 730d, magnetic plate 720e
, 720f.

It consists of 12W1 of the shield plate 710b.

The shield plates 710a and 710b are made of glass evo:
A printed circuit board is used in which a copper plate 712 is attached to one side of an insulating 3-substrate board 711 made of Niji or the like.

The magnetic plates 7208 to 720r have a plurality of (eight in the illustrated example) long magnetic bodies 721 arranged almost in parallel, and two
It is sandwiched between two sheets of insulating substrates made of glass epoxy or the like and integrated with heat-pressed bamboo or the like. Here, the magnetic material 721 is made of material 44, which is difficult to magnetize even when a magnet is brought close to it, has a small I5 coercive force, and has a high magnetic permeability (μ), for example, an aluminum material with a circular cross section and a diameter of about 0.1 s+. ? Sway%t is used.

As the amorphous wire, for example (F C1-xC
Ox) 758! 1oB 1s (atomic %) (x indicates the ratio of Fe and CO and takes a value of 0 to 1.

) etc. are suitable.

The conductor plates 730a to 730d are made by etching a printed circuit board with a copper plate attached to one side of an insulating lj board such as Glass Evo 4 Niji, and have a plurality of (17 in the illustrated example) land holes at both ends. It is formed by forming a conductor.

Questions about the magnetic plates 720a and 720b? 20c.

The substrates 720d and 720e and 720r are brought close to each other and fixed by heating, and the other substrates are approached and fixed via an adhesive sheet. At this time, the magnetic plate 720a.

The magnetic bodies of 7200 and 720e are in the Y direction, and the magnetic body plate 7
The magnetic materials of 20b, 720d, and 7201 are
+N salient arranged along the direction, conductor plate 730a,
730c (r) The conductors are arranged in a direction not intersecting the Y direction, and the conductors of the conductor plates 730b and 730d are arranged in a direction perpendicular to the X direction.

Na J3, other y! As the J''Ili method, two magnetic plates are heated and pressed together so that the magnetic bodies are perpendicular to each other.
A printed circuit board is approached and fixed on both outsides, and a conductor is formed by erosion and etching.
The shield plate 7100, the magnetic plates 720a, 7
20b, FJ body plate 130a navy blue, conductor 11i 730
b, magnetic plates 720c, 720d, conductor plate 73
0C group, conductor plate 730d, magnetic plate 720c
, 720f.

A dark blue shield plate 710b is made, and these are further placed and fixed. The actual thickness of the tablet 70 is about 3 to 5 mm, but only the thickness direction is shown enlarged in the drawing.

Moreover, in the tablet 70, the magnetic plate 720a.

720b, 720e, 72QfG, the magnetic material γ21 therein forms a path for the magnetic flux generated around the excitation line, and J is for obtaining greater electromagnetic induction, and there is no particular design. t3 is fine. Further, the shield plates 710a and 710b are for preventing the incorporation of normal noise from the outside and the discharge of the induction box Δ to J3 and the outside, and may not be provided in particular.

Each of the conductors of the conductor plates 730b and 730d is arranged such that the upper and lower conductors are aligned with each other, and the upper and lower conductors are through-hole processed at the land hole at one end.
X-direction excitation lines 7408 to 740i and detection tlA 75Ga to 750h are alternately connected and wound around the magnetic body 721 in the magnetic plate 720d.

The other end of the excitation ta lines 74Qa to 740 on the conductor plate 130b side is connected to the adjacent l1llJv11 lines 7408 to 740.
i (7) Connected to the other end of the four-body plate 730d side, connected in series, and connected to the other end of the excitation line 740a and the excitation line 74
The other end of 01 is connected to the drive current source in the position detection circuit 9 in 19). Also, each detection line 750a ~ 7!1 inch)>! IIA board? The other end on the 3Ob side is connected to the multiplex + Noah 80 respectively, and the detection lines 750a to 7
The other end of conductor 50h on the IN 730d side is grounded to J (through).

Conductor plate? 30a? Each of the conductors 30c is connected vertically to each other by through-hole processing at a land hole at one end, and an excitation wire 160a in the Y direction winds around the magnetic material 721 in the magnetic material plate 720C. 760i and detection lines 770a to 770h are formed at an intersection 71. encouragement
The other end of the conductor plate 730a side of the a-line 760a to 7130i is connected to the 41 of the adjacent conductor plate 760a to 760i.
4If is connected to the other end on the 1730c side, that is, connected in series, and excitation vAF! 7eOa) Other end and encouragement (iltf) 7
60i (7) (t!! end 1; is connected to the drive current source. Also, the conductor 11ii of each detection line 710a to 770h
The other end on the 730a side is connected to the multiplexer 790, and the conductor plate 730 of the detection lines 770a to 770t).
The other end on the C side is commonly grounded.

FIG. 20 shows tablets i and I corresponding to tablet 70.
2 is a circuit block diagram showing a specific configuration of the Iti11 circuit 9. FIG. Hereinafter, the operation will be explained in detail together with a description of each circuit block.

When the tablet control circuit 9 is powered on, the tablet 70's excitation Ii line 7408~? 40i, 760a
A sine wave alternating current is caused to flow by the drive current source 901 until ~760ikt. At this time, the detection lines 750a to 750h and 770a to 770h are
8-7401 and 7GO) An induced voltage is generated by electromagnetic induction based on the alternating current flowing through 1-7601. This electromagnetic induction is caused by the magnetic material 72 of the magnetic material plates 720a to 7201'.
1, the higher the magnetic permeability of the magnetic body 721, the larger the electric current 1 of the induction phase 11 becomes.

By the way, the magnetic permeability of the magnetic body 721 changes considerably depending on the magnetic bias applied from the outside. The rate of change varies depending on the composition of the magnetic material, the frequency of the alternating current, or the addition of heat treatment to the magnetic material.
Here, I added a slight bearish bias of 1 to Figure 21! Assume that 1,1 has a large hu value, and that it decreases as more shell surface air bias is added.

When the tip of the human-powered magnet 3 is placed above the magnetic body 721, the magnetic flux emitted from the bar magnet 302 is directly below the tip of the magnetic body 721.
21, and on both sides, the magnetic material 1 gradually increases.
21. The magnetic bias force applied to the magnetic body 121 increases as the angle at which the magnetic flux and the magnetic body 721 intersect decreases, so it is smallest just below the tip of the input ben 33 and increases as it moves away from here. It gradually becomes larger.

Therefore, when the tip of the input pen 3 is applied to the input surface normally formed on the upper part of the tablet 70, the magnetic bias applied to the magnetic body 721 directly under the tip is set to the slight magnetic bias M. death.

Distance # of the tip of the input ben 3 from the detection line 750a in the X direction
Ix is the distance ys in the Y direction from the rice detection line 770a [
] When pressed against the separated input surface position, for example, the X direction detection FA750a to 7bOrl 1. : As shown in Fig. 22, the voltage value generated on the detection line closest to the position where the input vent 3 is placed (specified position) is set as the maximum 116,
Induced call voltages V1 to V8 are generated that gradually decrease as the distance from the specified position increases. In FIG. 22, the horizontal axis represents the positions of detection lines 750a to 750h, respectively.
8, the coordinate position in the X direction is shown, and the vertical axis shows the voltage value.

On the other hand, at this time, when the electronic sieve machine 7 sends a measurement start command signal to the arithmetic processing circuit 902 in the same manner as described above, the arithmetic processing circuit 902 outputs an output buffer? A control signal is sent to the multiplexer 780 via the X-direction detection line 750a.
The induced voltages of ˜750F1 are sequentially input to the amplifier 904. Each of the induced voltages is amplified by an amplifier 904 and a detector 9
05 (converted to DC voltage, and then analog voltage)
It is converted into a digital value by a digital (A/D) converter 906 and sent to an arithmetic processing circuit 902 via an input buffer 901.
will be sent to.

In the processing circuit 902, each induced voltage (digital value)
are temporarily stored in the memory 908, and the coordinate value X in the X direction is determined from these.

Various methods can be considered for the 0 output of the tfA pin Lecture! Find a function that is close to 11 m J voltage, and find the maximum 1 of that function.
There is a method to find the coordinates ((1° [X). Here, 191 epo, each detection line 750a to 75
If the interval of 0tl is set to 4× and the distance from coordinate Well, from the voltage and coordinates of each detection line (llf, V = a (x
S−x, ) +b −・−(1)V4=a (x
4-x,) +b ・・・−・−(2)v −a
(X5-xS)]-b...(3). Here, a and b are constants (a<O).

Also, x4−x3=Ax −−−−−−(
4) xS-X3=2Δx −・−・−(
5). Substituting equations (4) and (5) into equations (2) and (3) and rearranging, x = X3 +Ax/2 ((3V3-4V4 +V5
)/(V3-2V4-+V5))・・・・・・(
6) becomes. Therefore, the detection line is 750G in the above equation (6).

750d, 750e 1. : m 1? tflc
V, V4. V5, coordinate value X of rice detection line γ50c
By substituting and calculating 3 (known), the X coordinate value
, can be found.

The arithmetic processing circuit 902 first selects the induced voltage 81 having the maximum value (in this case, the maximum voltage 1iri) from among the induced voltages.
Detects voltage ■. Furthermore, the dedicated processing circuit 902 extracts the Vg voltage k and the induced voltages v and 2 before and after it from the memory 908, and converts them into the voltage v3°V in the equation (6), respectively. V
, , perform the calculation process of equation (6), and obtain the X coordinate value X,
seek.

Next, the arithmetic processing circuit 902 outputs
Control the multiplexer 790 (send the 1"i number, manually apply the 14 conductive voltages of the detection lines 770a to 770t1 in the Y direction in sequence, and perform the same process I!I! as in 41) to determine the Y coordinate value y,
seek.

The X and Y coordinate values of the digital values obtained in this manner are temporarily stored in the electronic meter 908, and
However, while the signal indicating the start of measurement is being sent out, the above-mentioned measurement J3 and peak performance are repeated at predetermined intervals, and the values thereof are updated.

Similarly to the above, the electronic sieve machine 7 sends the X and Y coordinate values to the timing control circuit 6 and, if necessary, to a display device or the like for display. Further, as described above, when the timing signal is sent from the timing control circuit 6, the X and Y coordinate values at the point in time are input as designated coordinate values.

FIG. 23 shows a specific example of the drive current source 901. In the same figure, reference numeral 9018 is an integrating circuit, which takes the clock pulse (or the pulse obtained by frequency-dividing the clock pulse) of the processing circuit 902 as a signal wave 3, integrates it, and converts it into a triangular wave signal 15. 901b is a band pass filter that converts the triangular wave signal into a 1r string wave (No. 1). 901C
is a power driver, which consists of an operational amplifier and a current amplifier, which amplifies the sine wave (f) with current and generates an excitation signal.
740i to line 740a.

160a to 1601. J3.3. The reason why one pulse is used by the S quasi (input) signal is to synchronize the tablet control circuit 9.

It should be noted that the number of magnetic materials, excitation I4 & J: and detection lines in the embodiment is just one example, and it goes without saying that the number is not limited to this. Furthermore, it has been confirmed through experiments that position detection can be performed with relatively high accuracy if the distance between the detection lines is approximately 2 to 6 m. Magnetic generators for the first place trade designation are not limited to bar magnets, and may be plates, rings, square bars, etc., or even electromagnets.

In the above-mentioned embodiment -3, the spacer 36 is provided to prevent the upper plate 32 from bending more than necessary and to prevent the vibration sensor 33 from being damaged.
Instead of , shake it as shown in Figure 24(a)! FJIt7
The area around the IJ-33 is made of hard plastic, etc.
Attach the protective ring 37 that protects the specified n'i:s! When the input pen 3 is pressed 1 [on the board 4432]
As shown in 1)), it is also possible to prevent the bending beyond a predetermined position.

Further, the conductor plate 40 can be used as it is as the upper plate material of the vibration detection unit I.

FIG. 25 shows a preferred example of the vibration sensor 33. In the figure, 33a is a disc-shaped ceramic resonator with a diameter of 25 m and a P3i size of 50 μm, 33b, 33
C is a brass plate with a diameter of 44 m and a thickness of 50 um. Fixed. Further, both sides of the adult element 33a are bonded to brass plates 33b and 33c with conductive adhesive.
The brass plates 33b and 33c each constitute two electrodes.

(Effect of the Invention) As described above, according to the present invention, the touch panel detects the touch of the hand, while the vibration detection unit detects the vibration accompanying the contact of the magnetic generator or the like, and the vibration unit 4:5'i due to hand contact is canceled out from the detection signal of Therefore, an input pen equipped only with a magnetic generator can be used and can be operated with a natural feeling like a normal writing instrument. Furthermore, the timing signal is not interrupted even if the input pen is not moved on the unit.
There is no risk that one stroke of a handwritten character will be recognized separately, and the coordinate value of a single point can be extracted, and the timing signal can also be extracted even if thick paper is placed on the unit. Moreover, it has the advantage of being able to operate the magnetic generator without moving over a wide range of speeds.

[Brief explanation of drawings]

Drawing G shows one embodiment of the input device according to the first invention, in which FIG. 1 is a perspective view showing a plant-like structure, FIG. 4 is a sectional view of the input pen 3, FIG. 5 is a plan view of the structure of the tablet 10, and FIG. 6 is taken along line Vl-Vl in FIG. A cross-sectional view, Figure 7 is a characteristic diagram of electrical bias versus electromechanical coupling coefficient, and Figure 8 is
The figure is a block diagram of tablet a, II i11 circuit 5,
9 is a diagram showing an example of a temporal change in the induced electromotive force generated in the second coil 16 in the X direction, FIG. 10 is an exploded perspective view of the vibration detection unit 30, and FIG. 11 is a diagram showing an example of the temporal change in the induced electromotive force generated in the second coil 16 in the X direction.
0, FIG. 12 is a tli plane view showing the operating state of the vibration detection unit 30, FIG. 13 is a partially cutaway plan view of the conductor plate 40, and FIG. 14 is a diagram of FIG. A cross-sectional view in the direction of the line arrow, FIG. 15 is timing 1IIIt.
111 circuit 6, FIG. 16(a) is a circuit diagram of the touch detection circuit 610, FIG. 16(b) is an input and output waveform diagram of the touch detection circuit 610, and FIG. 17 is a block diagram of the timing detection circuit 620. , Fig. 18(a)(b)
(c) (d) (c) is a waveform diagram of each part in Figure 171 (No. 3 waveform diagram, Figure 19 is a diagram showing the specific structure of other tabs and reds 1-70, Figure 20 is a diagram showing other tablets) 11379 of the control circuit 9, and FIG. 21 are characteristic diagrams of magnetic bias and magnetic permeability, FIG. 22 is a σ graph showing an example of the induced voltage generated on each detection line in the X direction, and FIG. is the driving current source 90
24(a) and 24(b) are cross-sectional views showing other embodiments of the vibration detection unit, and FIG. 25 is a vibration detection unit shown in FIG. FIG. 2 is an exploded perspective view of a specific example of a lancer. 1... Input/output panel, 2... Control device, 3... Human pen, 4... Power supply device, 5... Tablet!・Regulation
2+1 circuit, 6...timing control circuit, 7...electronic meter) dawn, 10...tablet, 30...vibration detection unit, 31.32...1st. Second plate material, 33
...Vibration sensor, 34...Protrusion, 40...Conductor plate, 41...Insulating substrate, 42...Conductor. Patent applicant: W-LM Co., Ltd. Patent attorney Yoshi 1) Takashi Sei 1 Okizo, 2 Figure 4 Figure 5 Figure 6 Figure 7 Magnetic noise (Oe) Figure 8 Figure 9 Fig. 10 Fig. 11 Fig. 12 Fig. 16 (a) (b) Touch-off Touch-off Fig. 20 Fig. 21 Fig. 22 (Method) May 8, 1986 “1”

Claims (5)

[Claims] (1) A position detection device that detects a specified position on a tablet using a magnetic generator that generates a steady magnetic field, which has approximately the same size as the tablet and has a vibration sensor on one side. A first plate member and a second plate member having approximately the same size as the tablet and having a protrusion that presses the vibration sensor on one surface thereof are fixed to each other so that the vibration sensor and the protrusion are fixed to each other. a vibration detection unit that is stacked on top of each other and fixed to each other only at one side and the other side opposite to the vibration detection unit; a touch panel that is approximately the same size as a tablet and that senses the touch of a hand; detects the time when the magnetic generator etc. contacts the touch panel, and detects the time when the magnetic generator etc. contacts or leaves the first or second plate material from the output signal of the vibration sensor, and from these, the magnetic generator etc. or a control circuit that generates a timing signal corresponding to the period in which the tablet is in contact with the second plate, the vibration detection unit is superimposed on the tablet, and a touch panel is fixed on the vibration detection unit. Characteristic position detection device. (2) Using a vibration detection unit in which a plurality of vibration sensors and a plurality of protrusions that press the vibration sensors are arranged at predetermined intervals, a vibration sensor near the coordinates whose position has been detected among the plurality of vibration sensors is used. 2. The position detecting device according to claim 1, wherein the point in time when the magnetic generator or the like comes into contact with or leaves the first or second plate is detected from the output signal. (3) Claims characterized in that a conductor plate having a conductor arranged on an insulating substrate is used as a touch panel, and the point of contact with the hand is detected based on the level of power supply hum induced in the conductor. The position detection device according to item 1 or 2. (4) A conductor plate made up of a plurality of conductors arranged at predetermined intervals is used, and the point in time when a hand touches the conductor plate is detected from among the conductors near the coordinates whose position has been detected. A position detection device according to claim 3, characterized in that: (5) Place the touch panel on the first or second vibration detection unit.
The position detection device according to any one of claims 1 to 4, characterized in that it is used as a plate material.