JPH05189126A - Dotting input device - Google Patents

Abstract

PURPOSE:To enable exact dotting position detection by removing a noise signal caused by vibrating the main body of the device supporting table glass. CONSTITUTION:Around table glass 1 constituting a control panel, four sensors S1... are arranged for detecting vibrations and dotting positions and by specifying the dotting positions on the table glass detected by these sensors S1..., the vibrations on the main body side of the device are detected by vibration detection sensors N1... fitted to supporting plate metal 14 supporting the table glass 1 through a supporting member 15 corresponding to the sensors S1.... By subtracting detection signals from both of these sensors, even when the sensors S1... detect the vibrations on the main body side of the device, the detection signal caused by the vibrations is removed from the detection signal detected by the sensors N1... and the signal dotting the surface of the table glass 1 is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dot input device which detects a dot position on a board and enables an input corresponding to the position detection.

<Outline of the Invention> A hitting point input device according to the present invention detects a hitting point position on a board-like operation surface for inputting data and the like, and defines items such as numerical values and characters at the hitting point position. , Function (including designation of area)
This is a device that enables input of input information items such as.
In particular, the operation surface is struck with an input pen, and vibrations from the struck position at that time are received by a plurality of position detection sensors,
This is to detect the hitting point position by calculating the received signal. By grasping the input position (coordinate position) by this, input of the above-mentioned items previously assigned to the area of the coordinate position. Is possible. Therefore, without using the conventional complicated mechanism, high precision, low cost,
Moreover, the present invention relates to an input device having good operability, and is suitable for an information input device and a region input device of a copying machine.

[0003]

2. Description of the Related Art As a method for inputting items (various information),
Conventionally, various methods have been used.

For example, in an electronic device or the like, a keyboard or the like is used for keying information input, and a sensor (switch by electric contact or the like) for individually detecting an input is provided for each key. ing.

Further, in an image forming apparatus such as a copying machine, in addition to providing the keyboard as described above on the operation section,
An area input device used to specify an area to be copied or an area not to be copied is provided. The following are various conventional input methods for inputting a region.

(1) The copied image is superposed on a transparent sheet having grid-like scales beforehand, and the transparent sheet scales are X-axis and Y-axis.
A method in which the data is read separately in the axial direction and the operator inputs one point at a time using the numeric keypad.

(2) A method in which X-axis and Y-axis scales are provided on the platen, the scales are read in the same manner, and the data of the required points are input from the ten-key pad.

(3) A method in which switch rows are provided at regular intervals in each of the X-axis and Y-axis directions on the platen and corresponding coordinates are input by operating two switches.

(4) A method in which a sensor matrix array is formed in a planar shape on the upper surface of an original cover separately from the original table and the position is input with an input pen or the like.

As described above, if the area input methods (1) and (2) are adopted, the cost can be reduced, but the operability is extremely poor. If the method (3) is adopted, it is necessary to separately input the X-axis data and the Y-axis data, so that there is a drawback that the operability is poor.

According to the input method (4), the operability is improved, but the sensor matrix array is expensive, so that the entire input device is expensive. In addition, a table for reading a document such as a document table is required to have transparency and smoothness, and the sensor matrix array cannot be directly provided, and a dedicated table for placing the document and inputting a designated position is provided. There is a need. In this case, there is a drawback that the original must be replaced.

Therefore, the area input device described in Japanese Patent Laid-Open No. 63-244068 has been proposed. This is a device that uses the document table itself on which the document is placed, specifies the required area of the document to be placed on the document table with a dot, and specifies the area. In particular, by using a pen for inputting, incorporating a vibration source into this pen, providing at least three vibration detecting elements around the platen, and scoring on the platen with the input pen, the dot position can be determined. The hitting position is specified by receiving with three vibration detection elements and detecting the reception timing. Although the specific means and configuration for specifying the hitting point position are not specified in detail, the cost is reduced because the document table itself is used and the key input device and the matrix array are not required. Can be achieved.

[0013]

Problems to be Solved by the Invention JP-A-63-1440
According to the apparatus for inputting the area described in Japanese Patent No. 68, it is very convenient that the necessary area of the original can be designated by dot-writing on the original table itself on which the original is placed.

However, the main body of an apparatus such as a copying machine is a mass of vibration sources, and if a sensor detects vibration from a vibration source such as a drive motor, a solenoid, a clutch, etc., it will be erroneously detected, and an accurate spot position will be determined. You may not be able to understand and may make an incorrect input. That is, vibration (noise) from a vibration source different from the input pen is input, and this noise is erroneously detected as a hitting point position by the input pen.

The present invention effectively eliminates the above noise,
That is, an object is to provide a dot input device that is not affected by noise.

[0016]

The hitting point input device of the present invention comprises an operating surface having an area where dots can be entered, an input pen for hitting the operating surface, and a plurality of the pen are arranged at appropriate places on the operating surface. A dot position detection sensor that receives vibration from the dot position of the operation surface, a vibration detection sensor that is provided corresponding to each of the dot position detection sensors provided on the apparatus main body side that supports the operation surface, and the dot. The subtracting means for subtracting each signal from the vibration detecting sensor from each signal from the position detecting sensor, the signal processing circuit for detecting each time difference of the output of the subtracting means, and the input pen according to the time difference by the signal processing circuit. Computing means for computing the dot position,
Means for inputting according to the hitting point position calculated by the calculating means.

Further, another dot input device according to the present invention comprises an operation surface having an area where dots can be input, an input pen having a vibration source vibrating at a specific vibration frequency for dot on the operation surface, and A plurality of spotting position detection sensors that are arranged at appropriate places on the operation surface and receive vibrations from the spotting position on the operation surface,
A frequency band filter that receives a signal from the hit point position detection sensor and passes a band of the vibration frequency of the vibration source of the input pen, and a signal processing circuit that detects a time difference between signals output from the filter. The present invention is characterized in that it is provided with a calculating means for calculating a hitting point position by the input pen based on a time difference by the signal processing circuit, and a means for performing an input according to the hitting point position calculated by the calculating means.

[0018]

According to the hitting point input device of the present invention configured as described above, by hitting an arbitrary point on the operation surface with the input pen, a hitting position detection sensor arranged at a proper position on the operation surface. , The vibration is detected at different timings. With respect to the vibration from the detected hitting point position, the hitting point position is calculated by the timing difference when each sensor receives the vibration. At that time, the output signal from the vibration detection sensor provided on the apparatus main body side supporting the operation surface is subtracted from the detection signal of the hitting point detection sensor, and the time difference due to the subtracted signal is detected. Therefore, the noise due to the vibration on the apparatus main body side is removed by the subtraction process, and the vibration itself from the input pen is detected. Then, the hit point position on the operation surface is calculated from the time difference between the noise-removed detection signals, and the input corresponding to the position can be performed.

Further, according to another dot input device of the present invention, a dot at a desired position on the operation surface is hit by an input pen so that a dot position detection sensor arranged at a proper position on the operation surface. , The vibration is detected at different timings. This detection signal removes the detection signal from other vibration sources, that is, the noise signal, in order to pick up only the signal vibrating at the specific frequency provided in the input pen by the frequency band filter, and only the specific frequency component Output. The timing difference when this signal is received by each sensor is detected, and the arbitrary hitting point position at the time difference is calculated by the calculating means.
It is possible to input an item corresponding to the obtained hitting point position.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a top view showing an operation surface of a copying machine equipped with a dot input device according to the present invention. 2 is a cross-sectional view showing an arrangement state of a dot detection sensor constituting the dot input device of the present invention in FIG. 1 and an arrangement state of a vibration detection sensor provided to remove noise received by the dot detection sensor. Is.

In FIG. 1, reference numeral 1 is a table glass for placing an original constituting an operation surface made of a transparent glass plate which is arranged on the upper surface of the copying machine main body, and 2 is a copy original 3. This is an original placement area for placing, and an image of the original placed in the area can be copied. Reference numeral 4 indicates a designated area of the placed document, and two points 5-5 'are provided on the operation surface.
A square area having a diagonal line between them, 6 is a reference line for placing the original 3 with the leading edge of the original 3 as a reference, and 7 is a reference index of the original to be placed, for example, a center line in image formation of the original.

Reference numeral 8 arranged on the right side shows a part of the input operation area, which is an input section for performing various copy modes such as functions of the copying machine according to the present invention and other data input. The input unit 8 is, for example, a table glass 1
It is printed on the front or back side and is used to input items according to the print contents. The input unit 8 includes items A and B for specifying a region, items C to F for setting a processing mode when copying, and an item G for selecting various colors by setting a mode of a color designation F of an image. There is.

An input unit 9 for other input items required for input operation of the copying machine is provided below the table glass 1. This input unit 9 is also similar to the input unit 8 described above.
It is printed on the back surface or front surface of the table glass 1. The input unit 9 is also provided with a liquid crystal display unit 10. In particular,
Numerical value input section 9-1 for inputting numerical data, magnification setting section 9-2 for setting copy magnification, automatic exposure mode (A
E) or an exposure mode setting section 9-3 for setting a manual exposure mode (ME) and an operation start input section 9-4 functioning as a print switch for starting a copying operation are printed on the table glass 1 with each area determined. ing. Numerical data and the like input by the numerical input unit 9-1 are displayed on the liquid crystal display unit 10.

It should be noted that the liquid crystal display unit 10 not only displays the number of sheets, but also changes the display contents in various ways and strikes an arbitrary position of the liquid crystal display unit 10 with an input pen or the like according to the display contents. Thus, it is possible to input an item according to the display content of the liquid crystal display unit 10.

On the other hand, in order to detect the hitting point position on the table glass 1, the hitting point position detecting sensors S ₁ to S ₁ to 4 according to the present invention are provided at the substantially central portions of the four pieces of the table glass 1.
S ₄ is directly adhered to the back surface or the front surface of the glass 1. The hit point position detection sensors S _{1 to} S ₄ are connected to S ₁ -S ₃
The on X-axis, and the S ₂ -S ₄ on the Y-axis, thereby arranged to position the center point of the origin O (0,0), for example, a document placing area 2. These dot position detection sensors S
_{1 to} S ₄ are provided to detect the spotted position on the table glass 1, and are piezoelectric elements, for example, capable of detecting the vibration transmitted from the spotted position, and the reception timing of the piezoelectric element. To detect.

The dot for indicating the dot position on the surface of the table glass 1 is made with an input pen. The input pen 12 has a mounting portion 11 formed in a concave shape in the upper part of the copying apparatus on the left side of the document mounting area 2 as a predetermined position, and is placed at that position. This placing part 11
Is provided with a placement state detecting means (not shown) for detecting the placement state of the input pen 12. Such an input pen 1
2 includes a vibration source (not shown) for vibrating the tip 12-1, a switch for manually or automatically closing the electrical contacts when the tip 12-1 is pressed against the operation surface, a power source, and the like. When the contacts are closed, power is supplied to the vibration source to vibrate the tip 12-1.

That is, if one point on the table glass 1 is hit with the input pen 12, the vibration of the tip 12-1 of the input pen from the hitting position causes the hitting point detection centers S _{1 to} S.
Reach to ₄ . At this time, each dot position detection sensor S _{1 to} S ₄
Detects (receives) vibration according to the straight line distance from the hit point position. In this case, the time (timing) of reception differs depending on the linear distance from the hit point position. As a result, the origin O
The dotted coordinate position for (0,0) can be calculated. Therefore, if the printing point of the document placement area 2
It is possible to discriminate whether or not the hitting point is on the input unit 8 or 9. Further, in the input section 8 or 9, it is possible to discriminate which position of each input item and to input a signal for that item.

Next, the input operation will be described by taking as an example the image editing operation procedure in the copying machine equipped with the dot input device according to the present invention.

Within the copyable area 2 with the image surface of the original 2 facing upward, the original position reference index 7 is used as a mark for the center line, and the leading edge of the original 3 is placed along the reference line 6 together.

When the input pen 12 placed on the placing section 11 is held by hand, the input pen placement state detecting means provided at that position detects the input pen 12 and the copy condition input state mode is detected. Is set to. Therefore, the area of the start item A of the input section 8 is set with the input pen 10 so that the area can be designated for the original 3 placed in the procedure. A desired designated area 4 is designated from the image surface side of the original 3 by marking two designated points 5 and 5'which are diagonal lines.

When a plurality of areas are designated, the input can be made by repeating the above operation.

When the area designation is finished, the input position B is hit by the input pen 12 so that a plurality of position data designated in the procedure is signaled to the main body of the copying machine as a designated area.

The processing mode of the document whose area is designated is
Trimming, masking, centering, color designation, etc. are available, and can be entered by marking the inside of the areas C to F as necessary.

By the above operation, after the input by the area designation of the original and the copy processing mode etc. by the area designation, the operation for setting the copy conditions such as the number of copies, the magnification and the exposure mode with the input pen 12 is performed. Can be done together.

Therefore, the input pen 12 is placed at a predetermined position 11 and the print switch 9-4 is operated to perform the copying operation according to the various copying conditions input as described above. ..

Here, regarding the detection of the hitting point position on the table glass 1 by the input pen 12, the coordinates of the hitting point position are calculated by calculating the time differences T ₁ and T ₂ as shown in the time chart of FIG. Can be asked. In FIG. 4, by hitting a designated point on the table glass 1 with the input pen 12, a shock wave oscillating in a specific cycle passes through the table glass 1 to detect each hitting point position detection sensor S.
Reach _{1 to} S ₄ . At this time, t ₀ is a timing when a dot is struck by the input pen 12, and t ₁ to t ₄ are timings when signals from the respective sensors S _{1 to} S ₄ are detected. And, T ₁ and T ₂ are sensors S ₁ -S ₃
The time difference between, and shows the time difference between the sensor S ₂ -S _4. This time difference is detected, and from the time differences T ₁ and T ₂ , the coordinates (x,
y) can be obtained.

Regarding the calculation processing of the dot position at an arbitrary point with the time differences T ₁ and T ₂ detected by the dot position detection sensors S _{1 to} S ₄ , the applicant of the present application dated September 6, 1990. Filed in Japanese Patent Application No. 2-238788
The details are omitted here. 3 shows the manuscript cover 19 of the copying machine body.
FIG. 3 is an external view of the copying machine showing a state in which the printer is opened.

Next, one embodiment of noise removal according to the present invention will be described in detail.

In particular, the table glass 1 is arranged on the upper part of the main body of the copying machine as shown in FIG. As shown in FIG. 2, the table glass 1 is supported on a supporting metal plate 14 via a mounting member 15. Then, the dot position detection sensors S _{1 to} S ₄ are attached to the back surface of the table glass 1. In FIG. 2, only the hitting point detection sensor S ₁ is shown, but other sensors S 1
_{2 to} S ₃ are similarly arranged.

On the other hand, in order to perform the noise removal, the strike position detection sensor S ₁ to S ₄ sensor for removing noise of the same structure (vibration detection sensor) N ₁ to N ₄ is the sensor S ₁
Corresponding to ~ S ₄ , they are attached to the support sheet metal 14 side. The vibration detection sensors N _{1 to} N ₄ support the sheet metal, especially in order to detect the vibrations received from the vibration source on the copying machine main body side by the sensors S _{1 to} S ₄ via the support member 15. It is provided on the 14 side. for that reason,
From the detection signal by the strike position detection sensor S ₁ to S _4, a detection signal of the vibration detection sensors N ₁ to N _4, if Ke subtract, noise removal is performed, enabling accurate vibration detection from the input pen 12.

Therefore, the vibration detection sensors N _{1 to} N ₄ are
At the same time as detecting the vibration of the main body of the copying machine, the sensor S ₁
To allow the detected the copying machine main body side of the noise signal equivalent to a signal detected in to S _4, it is disposed corresponding to supporting plate 14 side in close proximity to the attachment position of the sensor S1 to S4. The support sheet metal 14 has an opening at least in that region in order to optically scan a document placed on the table glass 1. Further, the support member 15 is preferably a member that does not transmit the vibration of the main body of the copying machine, and is made of, for example, a member such as rubber that absorbs the vibration. However, since the vibration detection sensors N _{1 to} N ₄ are provided for removing noise, it is not necessary to absorb all vibrations.

A circuit diagram of FIG. 5 shows a specific example for removing noise in the spotting position detecting sensors S _{1 to} S ₄ and the vibration detecting sensors N _{1 to} N ₄ attached to the table glass 1 as described above. .. Figure 5 shows a circuit configuration of the noise removal in strike position detection sensor S1 and the vibration detecting sensors N _1, each sensor S ₁ ~
It is provided individually corresponding to S ₄ .

In FIG. 5, the detection signal from the sensor S ₁ is amplified at a predetermined level via an amplifier circuit (composed of a differential amplifier) 21, and is subtracted via a delay circuit 23 to form a noise removal circuit. It is input to the circuit 25. The detection signal amplified by the amplifier circuit 21 is input to the inverting input terminal (−input terminal) of the differential amplifier that constitutes the subtraction circuit 25.

The signal detected by the vibration detecting sensor N ₁ is amplified by the amplifying circuit 22 and then delayed by the delay circuit 24.
It is supplied to the non-inverted input terminal (+ input terminal) of the subtraction circuit 25 via.

The detection signal from the hitting point detection sensor S ₁ input to the subtraction circuit 25 and the vibration detection sensor N
_To balance the signal detected at ₁ , a volume VR is connected between both output ends. That is,
The volume VR divides both signals, which are input to the subtraction circuit 25, as necessary, and adjusts so that the noise-removed detection signal output from the subtraction circuit 25 has the highest S / N ratio. It is provided in.

Further, the delay circuits 23 and 24 have phase differences between the output waveforms of the hitting point detection sensors S _{1 to} S ₄ and the output waveforms of the vibration detection sensors N _{1 to} N ₄ when the phase difference exists. To correct. That is, if the phase difference is large, the effect of noise removal is weakened, so it is preferable to eliminate the phase difference. Therefore, the delay circuits 23 and 24 adjust the delay time of both output signals to change the phase and correct the phase difference to almost zero. If there is no problem with the phase difference, it is not necessary to provide the delay circuits 23 and 24.

Therefore, in the detection signal output from the subtraction circuit 25, the noise signal generated by the vibration source on the main body of the copying machine is removed, and the vibration generated by hitting the table glass 1 with the input pen 12 is detected. It becomes the signal O1. The output signal O1 is the output signal O2~O4 according to other sensors S ₂ to S _4, input to the signal processing circuit 40 at the circuit 40, the strike position detection sensor S ₁ ~
At S _4, the time difference between the received signals is measured (detected).
Details of the signal processing circuit 40 are shown in FIG.

In FIG. 6, the detection signals O1 to O4 from which noise has been removed by the circuit of FIG.
The signal is extracted as a signal of a certain level or higher at ~ 26-4. Each output of the comparator 26 is the one-shot multivibrator (flip-flop) of the next stage.
Set 27-1 to 27-4. In particular, in order to detect the time difference between the sensors S ₁ and S ₃ and the time difference between the sensors S ₂ and S ₄ , the set signal from the flip-flop 27 is sent to the exclusive OR gates 28-1 and 28-2.
To enter. In short, the gates 28-1 and 28-2 become outputs "H" according to the difference between the rising times of the set signals from the flip-flops 27-1 and 27-3 and the flip-flops 27-2 and 27-4. ..

Therefore, by inputting the outputs of the gates 28-1 and 28-2 to the AND gates 29-1 and 29-2 and supplying the clock signal to the other input terminal of the AND gate 29, the clock signal Is output from the AND gate 29 when the output of the gate 28 is "H". Therefore, by counting this clock signal by the counters 30-1 and 30-2, the time difference T ₁ between the sensors S _{1 and} S ₃ ,
Time difference T ₂ of the between the sensor S ₂ -S ₄ is to be detected. Sensor S counted by this counter 30
The time difference T ₁ between _{1 and} S ₃ is input to the CPU 41, and the CPU 41 calculates the position hit by the input pen 12 together with the time difference T ₂ between the sensors S _{2 and} S ₄ . After this calculation, although not shown in the figure, the CPU 41 outputs a signal for resetting each flip-flip 27 and the counter 30. Next, the control block diagram of the copying machine of the present invention shown in FIG. 7 will be described.

The microcomputer (CPU) 41 has a signal processing circuit 40 shown in FIG. 6 based on the timing signal measured after noise removal from the sensors S _{1 to} S ₄ detected in FIGS. 5 and 6. By inputting a signal from the input unit, a calculation program for calculating the position of the hitting point 4 and data necessary for copying are input from the input units 8 and 9, and the copying apparatus operates according to the input. ROM 42 storing the control program, sensor S
RAM 43 for temporarily storing the detection timing of _{1 to} S ₄ , the calculation result of the specified point, the copying condition of the copying machine, the copying state of the copying machine, the number of input / output terminals of CPU 41, and the like to assist the control. I / O (input / output port) 44
Etc. are connected. The I / O 44 drives various sensors 45, a keyboard 46, a plurality of drive elements 47, a plurality of control elements 48, and a voice transmitter 49 which are necessary for controlling the drive of the optical system of the copying machine and the conveyance control of copy sheets. The driver 50 and the display device (the liquid crystal display unit 10) 51 are connected.

According to the circuit configuration shown in FIG. 7, the CPU 41 calculates the position where the dot is made with the input pen 12, and the input item corresponding to the coordinates of the dot position, for example, if the document placement area, the area designation 1 Ascertaining that each is a point, the respective information is input in the input units 8 and 9. This is performed according to the program stored in the ROM 42. Further, C1 -C4 is a circuit according to the noise removal processing strike position detection sensor S ₁ to S ₄ shown in FIG.

In addition to the specific example in which the vibration detecting sensors N _{1 to} N ₄ for removing noise shown in FIG. 2 are attached,
It may be arranged as shown in FIG. FIG. 8 shows the support member 1.
In FIG. 5, the hitting point position detecting sensors S _{1 to} S ₄ and the vibration detecting sensors N _{1 to} N ₄ are arranged so as to be sandwiched therebetween. This is effective in making the detection states of both sensors almost the same.

Next, another embodiment for removing noise will be described with reference to FIG. In this embodiment, the sensor S ₁
Regarding points attached to the table glass 1 of S ₄ to S ₄ , for example, they are attached to the back surface of the table glass 1 as shown in FIG.

Then, the vibration frequency of the vibration source at the tip of the input pen 12 is set to, for example, about 500 KHz. Therefore, the vibration of the input pen 12 is detected by the sensors S ₁ to S _{1.
When the 4} receives, especially if the signal of 500 KHz is mainly detected, the signal processing can be performed in a form in which the noise signal due to the vibration from the other vibration source is removed.

Therefore, as shown in FIG. 9, for example, the detection signal from the sensor S ₁ is amplified by the amplifier 31 at a predetermined level, and the amplified detection signal is passed through the frequency band filter (bandpass filter) 32. , 50
Only the frequency component of 0 KHz is passed, and the other frequency components are cut. This frequency band filter 32
Constitutes a noise removing circuit, whereby a signal passing through the frequency band filter 32 is detected as a signal when the input pen 12 is hit, and a noise signal generated by another vibration source is removed.

The signal output from the frequency band filter 32 is subjected to a signal processing circuit 40 similar to that shown in FIG. ₃ between the sensors S ₁ -S _{3 and} between the sensors S ₂ -S _4.
The time difference between them is detected and input to the CPU 41.

The time difference measured as described above is the CP that controls the main body of the copying machine in the block diagram of FIG.
Input to U41, the CPU 41 is
The position of the dot on the table glass 1 is calculated by the input pen 12.

[0058]

[Effect] According to the dot input device of the present invention, when the dot is input by the input pen and the vibration is detected by the sensor,
Since the signal from the noise removal sensor is removed, the influence of noise signals from other vibration sources can be prevented.
Therefore, it is possible to accurately detect the hitting point position and perform stable input.

Further, by identifying the vibration frequency by the input pen and providing a filter through which the specific frequency of the signal detected on the sensor side passes, noise signals from other vibration sources can be removed. It is possible to accurately detect the hitting point position.

[Brief description of drawings]

FIG. 1 is a top view showing details of the vicinity of a document placing area showing an example of a copying apparatus including a dot input device according to the present invention.

FIG. 2 is a cross-sectional view showing an example of attachment of a hit point position detection sensor and a vibration detection sensor for noise removal in FIG.

FIG. 3 is a perspective view showing the appearance of FIG.

4 is a time chart showing a state in which a shock wave is transmitted through the table glass and reaches each sensor when a designated point on the table glass in the dot input device of FIG. 1 is hit with an input pen.

FIG. 5 is a circuit diagram showing a specific example of noise removal according to the present invention.

6 is a circuit diagram showing an example of a signal processing circuit for measuring a time difference (reception timing) of detection signals in FIG.

FIG. 7 is a block diagram illustrating a circuit outline of a signal input device and a copying device applied to the present invention.

FIG. 8 is a cross-sectional view showing another specific example of the arrangement example of the hitting point position detection sensor and the vibration detection sensor according to the present invention.

FIG. 9 is a circuit diagram showing another specific example of noise removal according to the present invention.

[Explanation of symbols]

1 Table Glass 2 Copyable Area 3 Original Document 8, 9 Input Section 12 Input Pen 14 Supporting Member 15 Support Sheet Metal 25 Subtraction Circuit (Noise Removal Circuit) 32 Frequency Band Filter (Noise Removal Circuit) 40 Signal Processing Circuit (For Detection of Time Difference) ) 41 CPU 42 ROM S _{1 to} S ₄ Dot position detection sensor N _{1 to} N ₄ Vibration detection sensor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuyuki Ueda, 22-22 Nagaike-cho, Abeno-ku, Osaka, Osaka Prefecture (72) Inventor Kazunori Aida 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka (72) Inventor Kazunori Iwasa 22-22 Nagaike-cho, Abeno-ku, Osaka City, Osaka Prefecture

Claims (2)

[Claims] 1. An operation surface having an area where dots can be input, an input pen for dot-forming the operation surface, and a plurality of dots arranged at appropriate positions on the operation surface for receiving vibrations from the dot position of the operation surface. A position detection sensor, a vibration detection sensor that is provided on the side of the main body of the device that supports the operation surface, and is arranged corresponding to each of the dot position detection sensors, and a vibration detection sensor based on the signals from the dot position detection sensor. Means for subtracting each of the signals, a signal processing circuit for detecting each time difference of the output signals of the subtraction means, an operation means for calculating the hitting point position by the input pen by the time difference by the signal processing circuit, and the operation A dot input device comprising: means for inputting in accordance with the dot position calculated by the means. 2. An operation surface having an area where dots can be input, an input pen having a vibration source that vibrates at a specific vibration frequency that hits the operation surface, and a plurality of input pens are arranged at appropriate positions on the operation surface. A dot-spot position detection sensor for receiving vibrations from the dot-spot position on the operation surface; a frequency band filter for inputting a signal from the dot-spot position detection sensor to pass a vibration frequency band of a vibration source of the input pen; A signal processing circuit for detecting a time difference between the signals output from the filter, a calculating means for calculating a hitting position by the input pen based on the time difference by the signal processing circuit, and a calculating means for calculating a hitting position calculated by the calculating means. A dot input device comprising: means for inputting.