JPH10307673A - Coordinate input device and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the coordinate input device and its control method which enables automatic parallax correction in the process of normal input operation and improves the usability. SOLUTION: The coordinate value of an indicated input position is detected and on the basis of the detected coordinate value and a previously set input area, corresponding key data is outputted (steps S100, S101, and S102). At this time, the detected coordinate value is stored in a memory while made to correspond to the input area (step S103). When the number of coordinate values which are stored in the memory and correspond to the input area reaches a specific number, the position distribution of the coordinate values stored in the memory is calculated (steps S104 and S105). Here, the geometrical center of the coordinate values stored in the memory is found. Then the input area is so moved that the found geometric center comes to the center of the input area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate input device and a control method thereof, and more particularly to a coordinate input device for detecting coordinates of a position designated on a coordinate input surface and inputting information and a control method thereof. It is.

[0002]

2. Description of the Related Art Conventionally, pen input computers and pen input tablets have been realized as devices to which a coordinate input device is applied. In these devices, a digitizer that inputs coordinates by instructing a tablet to be pressed with an input pen has been put into practical use as a coordinate input device. further,
An input / output integrated type configuration in which a transparent tablet is placed on a display such as a liquid crystal has been put to practical use. According to such a configuration, by performing echo-back display at a position corresponding to the coordinate input position, it is possible to perform an input operation as if writing on paper.

By the way, when the above-mentioned input / output integrated type coordinate input device is constructed, a gap of about several mm exists between the tablet and the display. For this reason, parallax is generated depending on the viewing angle of the user, and it may not be possible to input coordinates to a desired position. The following is a method of calibrating parallax and a method of automatically correcting the parallax of the input / output integrated coordinate input device.

(1) Japanese Patent Application Laid-Open No. Sho 63-126027 has devised a method of performing parallax calibration by pressing an displayed point by an operator. In this method, parallax calibration is performed by displaying a dot pattern or the like at a predetermined position on the display surface, inputting coordinates at the display position, and calculating a correction coefficient from a difference between the coordinates of the display position and the actual input coordinates. Is what you do.

(2) Japanese Patent Application Laid-Open No. 2-206819 discloses a method of performing parallax calibration by attaching a calibration ruler. This is intended to eliminate errors due to parallax and camera shake in a conventional calibration method for indicating a fixed point, and to improve the accuracy of calibration. Specifically, the calibration is performed by mounting a calibration ruler at a position set as a reference of the exterior, and pressing a correct calibration point using the ruler.

(3) Japanese Patent Application No. Hei 5-209393 proposes a method of correcting the parallax by detecting the inclination of the apparatus. This aims to correct the difference in parallax between holding the device by hand and placing it on a desk. In other words, when held by hand, generally use the device tilted,
The relationship between the operator and the screen becomes almost vertical. On the other hand, when the apparatus is placed on a desk, the apparatus is used horizontally, and the operator views the screen from obliquely below. Therefore, when used on a desk, it is necessary to maintain the parallax between the screen and the input surface. Therefore, parallax correction is realized by detecting the inclination of the device with a mercury switch or the like and correcting the coordinate input when it is determined that there is no inclination.

As an example of applying a coordinate input device,
There are soft keyboard and soft switch functions. In these, a keyboard or switch pattern is displayed on a display, and a code corresponding to a coordinate input in an area on each key is output.

[0008]

However, in the above-mentioned conventional example, it is necessary to perform a calibration operation for accurate parallax correction, which is disadvantageous in that it is not easy to use. That is, in the above-described prior arts (1) and (2), it is necessary to switch to the parallax calibration mode each time the parallax is corrected, which is extremely inconvenient. Further, in the above-described related art (3), since the actual amount of parallax generation is not known, correction cannot be performed accurately. For example, if an operator uses a device placed on a desk so that the operator looks into it from above, the correction is performed even though no parallax has occurred, resulting in a shift between the input position and the display image. I was In particular, with respect to the soft keyboard function, if a "delete" key, a "cancel" key, or the like is erroneously pressed due to parallax, the damage to the user has been significant.

The present invention has been made in view of the above-mentioned conventional example, and provides a coordinate input device and a control method therefor which enable accurate parallax correction to be automatically performed in the course of a normal input operation and improve usability. The purpose is to do.

[0010]

A coordinate input apparatus according to the present invention for achieving the above object has the following ward administration. That is, detecting means for detecting the designated coordinate input position,
Output means for outputting corresponding data based on the coordinate input position detected by the detection means and a preset input area; and changing the input area based on the coordinate input position performed on the input area Means.

Further, a method for controlling a coordinate input device according to the present invention for achieving the above object has the following steps. That is, a detection step of detecting a designated coordinate input position on the coordinate input surface, and an output step of outputting corresponding data based on the coordinate input position detected in the detection step and a preset input area. Changing the input area based on the coordinate input position of the input area.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

[First Embodiment] The outline of the first embodiment is as follows.
The embodiment is directed to a soft keyboard input device that outputs a character code corresponding to an input position on a tablet. In the input of the soft keyboard, the position where the coordinates are input is stored for each key, and a correction process is performed when a predetermined number of inputs are made. The content of the correction processing is an operation of calculating the geometric center of the coordinate input position to the target key, and changing the setting of the input area so that the geometric center becomes the center.

<Explanation of Apparatus Configuration (FIG. 1)> In this embodiment, a coordinate input apparatus constituted by an input / output integrated personal computer in which an ultrasonic digitizer is superposed on a liquid crystal panel will be described. The form of the coordinate input device to which the present invention can be applied is not limited to this.

FIG. 1 is a block diagram showing a schematic configuration of the image processing apparatus of the present embodiment. In FIG. 1, reference numeral 1 denotes a CPU that controls the entire apparatus, and executes processing such as arithmetic and I / O control according to a program stored in a memory unit 3.
The CPU peripheral controller 2 is used as a set with the CPU 1, and has I / Os (serial communication, parallel communication SN, real-time clock, timer,
Interrupt control, DMA control, etc.). Memory part 3
Are a DRAM and a cache R as main memories of the CPU 1.
Includes memories such as AM and ROM. In the memory unit 3, an input area table and a coordinate storage area described later are provided.

Reference numeral 4 denotes a hard disk drive for storing user data, device settings, and image data. Reference numeral 5 denotes an FDD control unit, and reference numeral 6 denotes a floppy disk drive. Reference numeral 8 denotes a digitizer for detecting coordinates designated by the input pen, and reference numeral 7 denotes a digitizer control unit. In this embodiment, an ultrasonic digitizer is used, and the configuration will be described later.

In the display unit 9, reference numeral 10 denotes a display control unit, which sequentially reads display data from the VRAM 11 and transfers data to the liquid crystal panel 12 while performing gradation conversion and the like. In addition, the display control unit 10 controls the V
Access to RAM 11 and display unit 6 from VRAM 11
Arbitration of data transfer to In the present embodiment,
The liquid crystal panel 12 displays information on various files and also displays image data. The communication unit 13
, 15 is a communication interface, and 14 is a communication control unit. Communication standards include serial communication such as RS-232C and Ethernet, Centronics and SCSI.
Interface for inputting and outputting documents, command data, and the like.

<Description of Coordinate Input Process (FIG. 2)> The configuration of the ultrasonic digitizer will be described below with reference to FIG.
FIG. 2 is a block diagram illustrating a configuration of the ultrasonic digitizer according to the present embodiment.

In the drawing, reference numeral 38 denotes a tablet in which piezoelectric elements 36A, 36B, 36C and 36D, which are ultrasonic sensors, are arranged at the periphery of the input surface. Reference numeral 37 denotes an antireflection member that absorbs elastic waves and is arranged to surround the periphery of the tablet 38. An input pen 16 includes an ultrasonic transducer 34 and a pen tip 35. Reference numeral 32 denotes a vibrator driving circuit, which drives an ultrasonic vibrator provided on the input pen 16. 39 is a reception waveform detection circuit, and each sensor 36A-3
A waveform is detected (detection of arrival of vibration) by receiving an ultrasonic reception signal from 6D. 31 is MPU, ROM, RAM
And the like, and controls the entire digitizer. Reference numeral 33 denotes a timer for generating an interrupt signal at set time intervals.
1 connected. The setting of the time interval is performed by the arithmetic processing unit 31.

When the vibrator drive circuit 32 is operated by the start signal of the arithmetic processing unit 31, a pulse signal is generated. The pulse signal is applied to the ultrasonic vibrator of the input pen 16 via a cord, whereby the vibrator 34 is driven and the pen tip 35 emits ultrasonic waves. When the pen point 35 is pressed on the input surface of the tablet 38 in this state, the ultrasonic wave oscillated from the pen point 35 propagates on the tablet 38 as an elastic wave, and the ultrasonic vibration is transmitted to the sensor 36.
A to 36D. The delay time tg from when the elastic wave is received by each sensor until the elastic wave is received is measured by the reception waveform detection circuit 39 synchronizing with the start signal. The output of the reception waveform detection circuit 39 is calculated by the calculation processing unit 31,
The coordinate position of the designated point of the pen tip 35 is calculated. The coordinate position data is transmitted to the CPU 1 and used for echo back to a display screen, input processing of a key switch, and the like.

<Description of Soft Keyboard Processing (FIGS. 3, 4, and 5)> FIGS. 3 and 4 show the relationship between the liquid crystal panel display and the tablet input area when performing the soft keyboard processing. The operation of the soft keyboard will be described with reference to FIG.

First, FIG. 3 is a diagram showing a display state of a soft keyboard of numeric keys. In the figure, reference numeral 40 denotes a key switch frame, and reference numeral 41 denotes a symbol corresponding to the switch, which is a pattern displayed on the liquid crystal panel 12. Reference numeral 42 denotes an input area corresponding to the key switch frame 40. When coordinates are input in the area of 42 on the tablet 38, it is determined that the input is to the key switch 40, and the character code of the symbol 41 is output.

FIG. 4 is a diagram for explaining how to determine whether a coordinate input has been made to the area 42. Xmin, Xmax, Y
min and Ymax are distances from the origin of the display surface and the tablet surface. The input coordinates on the tablet 38 are (X,
Y), when the condition of the following equation (1) is satisfied,
It is determined that the input is a coordinate input into the input area 42. When a plurality of keys are arranged as shown in FIG. 3, the minimum coordinates and the maximum coordinates of the input area are set for each key.
It is stored in the memory unit 3 as an input area table.

Xmin <X <Xmax and Ymin <Y <Ymax (1)

FIG. 5 shows a configuration example of the input area table.
Shown in FIG. 5 shows input areas of key switches from “1” to “5”, and Xmin, Xmax, Y
The values of min and Ymax are stored. This input area table is stored in the memory unit 3.

<Description of Input Area Change Processing (FIGS. 6, 7,
FIG. 8) >> A description will be given below of how to change the setting of the input area with reference to FIGS. FIG. 6A is a diagram showing how coordinates are input to the soft key switch. 3 and 4, reference numeral 40 denotes a key switch frame displayed on the liquid crystal panel, and reference numeral 42 denotes an input area corresponding to the key switch frame 40. Reference numeral 43 denotes a history of the position of the data whose coordinates are input by the input pen. One "x" mark indicates one coordinate input, and FIG. 7A shows the positions where this key switch has been pressed for the past 12 times. The input data history 43 in the figure is shifted to the lower left as compared with the key switch frame 40. This is due to parallax caused by the user using the device viewed from diagonally below.

FIG. 6B is a diagram showing a state in which the input area corresponds to the parallax. In the present embodiment, the geometric center of the input position is calculated, and the setting of the input area is changed so as to be centered on the geometric center. In the figure, 44 is the geometric center of the input data history 43, and 45 is a newly set input area. The position of the input area becomes 4 due to the setting change processing.
It is changed from 2 to 45. By such processing, even if the input coordinate position is deviated from the frame display, the input coordinate position is always located at the center of the input area. Therefore, it is possible to prevent other keys from being erroneously input or not being input.

FIG. 7 is a flowchart showing the flow of processing for changing the input area of the soft keyboard. Hereinafter, the input area change processing will be described with reference to FIG. In the present embodiment, in the soft keyboard input process, a process of calculating the geometric center of the input position to the target key every time a predetermined number of inputs are performed and resetting the input area so as to center on the geometric center is performed. .

Steps S100 to S102 are:
This is the input processing of the soft keyboard. Step S100
Then, coordinate input from the digitizer 8 is performed. Typically,
Although a coordinate sequence of several hundred points can be obtained from when the pen is moved down to the digitizer until the pen is moved up, in this embodiment, the last point that is pen-down is used as an input position. In step S101, it is determined which key switch has been pressed according to the procedure described in the previous section.
In a succeeding step S102, a code corresponding to the input key switch is output. In step S103,
The position where the coordinates were input is stored in the memory unit 3. In the memory unit 3, the coordinate storage area is provided separately for each key switch, and is stored in a storage area corresponding to the determination result in step S101. Also, the number of key inputs is counted for each key switch, and is stored similarly.

FIG. 8 shows a configuration example of the coordinate storage area. In the figure, coordinate input histories of key switches “1” to “3” are stored. For each switch, the 0th input coordinate is stored as (x0, y0) and the first input coordinate is stored as (x1, y1).

Returning to FIG. 1, in steps S104 to S106, the input area is changed. Step S
At 104, it is determined whether or not the number of times the key has been input this time has reached a predetermined number. If affirmative, the process proceeds to step S105, and if negative, the process ends. In the next step S105, the coordinates stored in the storage area are extracted, and the geometric center of the coordinate data is calculated. Assuming that the coordinate value of the i-th stored data is di = (xi, yi) and the number of data points is n, the geometric center davg (xavg, yavg) is given by equation (2).
It is calculated according to equation (3).

Xavg = (Σxi) / n Equation (2) yavg = (Σyi) / n Equation (3)

In the following step S106, the geometric center dav
The input area 42 is changed so as to center on g. Assuming that the size of the input area is xwid × ywid, the minimum value and the maximum value of the input area are calculated according to equations (4) to (7).

Xmin = xavg−xwid / 2 Equation (4) xmax = xavg + xwid / 2 Equation (5) ymin = yavg−ywid / 2 Equation (6) ymax = yavg + ywid / 2 Equation (7)

The new minimum and maximum values of the input area are stored in the corresponding key switches in the input area table, the number of data in the coordinate storage area is cleared, and the process is terminated.

Through the above processing, the setting of the input area can be changed so as to center on the geometric center of the coordinate position input to each key.

As described above, according to the present embodiment,
By calculating the geometric center of the input coordinates corresponding to each key and changing the input area so that the geometric center is the center, accurate parallax correction can be performed without the user having to set each time.

The present invention is not limited to the above-described embodiment, but can be widely applied. For example, in the present embodiment, an example using an ultrasonic digitizer has been described, but it goes without saying that a digitizer of another type such as an electromagnetic induction type or a resistive film type, or a touch panel may be used.

[Second Embodiment] In the first embodiment described above, an example has been described in which a coordinate storage area is provided for each key switch and each key is independently set and changed. In the present embodiment, an example will be described in which coordinate storage of all key switches and bias correction are collectively performed. Note that the configuration of the device and the configuration of the digitizer of the second embodiment are the same as those of the above-described first embodiment, and a description thereof will be omitted.

<Description of input area change processing (FIGS. 7 and 8)
The following describes the input area change processing according to the present embodiment. In the present embodiment, parallax correction is performed by adding an offset value to the minimum value and the maximum value of the input area. When the number of times of coordinate input is accumulated and reaches a predetermined number, an operation of calculating the distribution state and changing the offset value is performed.

FIG. 10 is a diagram showing an example of the data structure of the coordinate storage area. In the second embodiment, the input histories of all key switches are stored together. In the figure, the past 4
The state of the key input coordinate at the time is shown. Reference numeral 80 stores information on which key switch has been pressed. An area 81 stores a coordinate position designated by each key input. The figure shows a state in which key inputs are performed in the order of “1”, “2”, “1”, and “5”. The first input is for the key "1" and the coordinate position is (x0, y0). The second input is for the key "2" and the coordinate position is (x1, y1).

FIG. 9 is a flowchart showing the flow of the input area changing process according to the second embodiment. In the figure,
Steps S100 to S103 are the same as those in the above-described embodiment, and a detailed description thereof will be omitted. In the second embodiment, after performing the processing of step S100,
Proceed to step S200. In step S200, an offset value for correcting parallax is added to the coordinate input value, and the process proceeds to step S101. The procedure for calculating the offset value will be described later. In step S101, it is determined which key switch has been designated. If the offset values used in step S200 are xoff and yoff, the key switch determination in this case is as shown in equation (8).

Xmin <X + xoff <Xmax and Ymin <Y + yoff <Ymax Expression (8) That is, the key switch is a key switch in which an input area satisfying the above expression (8) is designated.

In the following step S102, a code is output, and in step S103, the coordinate values are stored in the coordinate storage area. As the coordinate values to be stored, the values input from the digitizer without using the offset value in step S200 are used.

In step S201, it is determined whether or not the cumulative number of coordinate inputs since the previous correction process has been performed has reached a predetermined number. If affirmative, the process proceeds to step S202, and if negative, the process ends. In step S202, the coordinates stored in the storage area are taken out, and the geometric mean of the deviation amount of the coordinate data is calculated. Assuming that the key switch center position input at the i-th position is (x (i) ctr, y (i) ctr), the input coordinate position is (x (i), y (i)), and the number of data points is n, the input area is Is calculated according to the equations (9) and (10). The key switch center position can be obtained from the key switch history 80 from the input area table.
The coordinates corresponding to are searched and obtained.

Xoff = (Σ (x (i) ctr−x (i))) / n Equation (9) yoff = (Σ (y (i) ctr−y (i))) / n Equation (10)

In step S203, the offset value is stored in the memory unit 3, and the counter for accumulating the number of times of coordinate input is reset, and the process ends.

With the above processing, it is possible to control the change of the offset value such that the center of the input area becomes the geometric center of the input coordinates.

As described above, according to the second embodiment, exactly the same effects as in the first embodiment can be obtained. Further, in the second embodiment, since the difference between the coordinate input positions of all keys is collectively determined, it is possible to perform quicker and faster parallax correction.

It should be noted that the present invention is not limited to the above-described embodiment, but can be widely applied. For example, in the second embodiment, the geometric center is used as a method of estimating the bias of the input coordinates. However, a center of gravity, a deviation, or the like may be used, or any method including a statistical method and a non-statistical method may be used. Can be used. In the first and second embodiments, the coordinate data is added equally, but each data may be weighted. For example, by performing weighting so that newly input coordinate data has a larger value, correction closer to the state of use can be performed.

In the second embodiment, the offset values xoff and yoff act on the coordinate input values. However, the offset values xoff and yoff may act on Xmax, Xmin, Ymax and Ymin representing the input area of each key. In this case, the semi-fixed formula in step S101 is as follows: Xmin + xoff <X <Xma + xoff and Ymin + yoff <Y <Ymax + yoff (11), and the processing in step S200 becomes unnecessary.

As described above, according to each of the above embodiments, the deviation of the coordinate data input into the input region of each key is detected, and the input region is changed so that the deviation center becomes the center. Thus, accurate parallax correction can be performed without requiring the user to set each time, and usability can be greatly improved.

Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), an apparatus (for example, a copier, a facsimile, etc.) comprising one device. Device).

Another object of the present invention is to supply a storage medium storing a program code of software for realizing the functions of the above-described embodiments to a system or apparatus, and to provide a computer (or CPU) of the system or apparatus.
And MPU) read and execute the program code stored in the storage medium.

In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

As a storage medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD
-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS (Operating System) running on the computer based on the instructions of the program code. ) May perform some or all of the actual processing, and the processing may realize the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instruction of the program code, It goes without saying that the CPU included in the function expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0059]

As described above, according to the present invention,
Accurate parallax correction can be automatically performed during the normal input operation, and the usability is significantly improved.

[0060]

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of an image processing apparatus according to an embodiment.

FIG. 2 is a block diagram illustrating a configuration of an ultrasonic digitizer according to the present embodiment.

FIG. 3 is a diagram showing a display state of a soft keyboard of numeric keys.

FIG. 4 is a diagram for explaining how to determine whether a coordinate input has been made to an area 42;

FIG. 5 is a diagram illustrating a configuration example of an input area table.

6A is a diagram illustrating a state of inputting coordinates to a soft key switch, and FIG. 6B is a diagram illustrating a state where an input area is made to correspond to parallax.

FIG. 7 is a flowchart illustrating a flow of processing for changing an input area of a soft keyboard.

FIG. 8 is a diagram illustrating a data configuration example of a coordinate storage area according to the first embodiment.

FIG. 9 is a flowchart illustrating a flow of an input area change process according to the second embodiment.

FIG. 10 is a diagram illustrating a data configuration example of a coordinate storage area according to the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 2 Peripheral controller 3 Memory part 4 Hard disk drive 5 FDD control part 6 Floppy disk drive 7 Digitizer control part 8 Digitizer 9 Display unit 10 Display control part 11 VRAM 12 Liquid crystal display 13 Communication unit 14 Communication control part 15 Communication interface

Claims (21)

[Claims] 1. A detecting means for detecting a designated coordinate input position; an output means for outputting corresponding data based on a coordinate input position detected by the detecting means and a preset input area; A coordinate input device comprising: a change unit configured to change the input area based on a coordinate input position set in the input area. 2. The method according to claim 1, wherein the change unit includes: a storage unit configured to store a plurality of coordinate input positions provided in the input area; and a moving unit configured to move the input area based on the plurality of coordinate input positions. The coordinate input device according to claim 1, wherein: 3. A plurality of input areas are provided,
3. The apparatus according to claim 2, wherein the storage means and the movement means are provided independently for each of the plurality of input areas.
2. The coordinate input device according to 1. 4. The moving means calculates a geometric center of the coordinate input position stored by the storage means, and moves the input area so that the geometric center becomes the center of the input area. 4. The coordinate input device according to claim 2, wherein 5. The apparatus according to claim 1, wherein the change unit changes the position of the input area based on a difference between a coordinate input position made in the input area and a predetermined position in the input area. Coordinate input device as described. 6. A storage unit for storing a plurality of coordinate input positions made in the input area, a change center based on a difference between a geometric center of the plurality of coordinate input positions and a center of the input area. The coordinate input device according to claim 5, further comprising a moving unit configured to move a position of the input area. 7. The method according to claim 1, wherein the change unit corrects the coordinate input position detected by the detection unit based on a difference between a coordinate input position made in the input area and a predetermined value in the input area. The coordinate input device according to claim 1. 8. The storage device according to claim 1, wherein the change unit stores a plurality of coordinate input positions provided in the input area, and a change center based on a geometric center of the plurality of coordinate input positions and a center of the input area. The coordinate input device according to claim 7, further comprising: a correction unit configured to correct a coordinate input position detected by the detection unit. 9. The storage device according to claim 9, wherein the set input area includes a plurality of input areas, the change unit stores a pair of the input area corresponding to the coordinate input position detected by the detection unit, and the storage unit Calculating means for calculating an average value of a difference between a coordinate input position and a center position of a corresponding input area obtained from each of the plurality of stored pairs; and detecting means using the average value calculated by the calculating means. The coordinate input device according to claim 7, further comprising a correction unit that corrects the coordinate input position detected in (1). 10. The coordinate input device according to claim 1, wherein said detection means is arranged such that a display screen and a coordinate input surface are overlapped. 11. The display device according to claim 10, wherein the detection unit performs a display indicating a position of the input area on a display screen.
2. The coordinate input device according to 1. 12. A detecting step of detecting a coordinate input position designated on a coordinate input surface, and outputting corresponding data based on the coordinate input position detected in the detecting step and a preset input area. A control method for a coordinate input device, comprising: an output step; and a changing step of changing the input area based on a coordinate input position performed on the input area. 13. The changing step includes: a storing step of storing a plurality of coordinate input positions made in the input area in a memory; and a moving step of moving the input area based on the plurality of coordinate input positions. The control method for a coordinate input device according to claim 12, wherein: 14. The apparatus according to claim 13, wherein there are a plurality of set input areas, and the storing step and the moving step are executed substantially independently for each of the plurality of input areas. The control method of the coordinate input device described. 15. The moving step includes calculating a geometric center of the coordinate input position stored in the memory by the storing step, and moving the input area so that the geometric center becomes the center of the input area. 11. The method according to claim 11, wherein:
3. The control method of the coordinate input device according to 2. 16. The method according to claim 12, wherein the changing step changes the position of the input area based on a difference between a coordinate input position made in the input area and a predetermined position in the input area. The control method of the coordinate input device described. 17. The method according to claim 17, wherein the changing step includes a step of storing a plurality of coordinate input positions made in the input area in a memory; and a step of calculating a difference between a geometric center of the plurality of coordinate input positions and a center of the input area. 17. The method according to claim 16, further comprising: a moving step of moving a position of the input area based on the input information. 18. The method according to claim 18, wherein the changing step corrects the coordinate input position detected in the detecting step based on a difference between a coordinate input position made in the input area and a predetermined value in the input area. The method of controlling a coordinate input device according to claim 12. 19. The changing step includes: storing a plurality of coordinate input positions in the input area in a memory; and calculating a difference between a geometric center of the plurality of coordinate input positions and a center of the input area. 19. The control method for a coordinate input device according to claim 18, further comprising: a correction step of correcting a coordinate input position detected in the detection step based on the detection step. 20. A method according to claim 19, wherein the input area includes a plurality of input areas, and the changing step includes: storing a pair of input areas corresponding to the coordinate input position detected in the detecting step in a memory; A calculating step of calculating the average value of the difference between the coordinate input position and the center position of the corresponding input area, obtained from each of the plurality of pairs stored in the memory, and the average value calculated in the calculating step. 19. The method according to claim 18, further comprising a correction step of correcting a coordinate input position detected in the detection step. 21. A storage medium for storing a control program for controlling a coordinate input device, wherein the control program detects a coordinate input position instructed by a computer, and the control program detects the coordinate input position. Output means for outputting corresponding data based on a coordinate input position and a preset input area; and functioning as changing means for changing the input area based on a coordinate input position made on the input area. Storage medium.