JP2000037990A - Electronic writing board and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an electronic writing board enabling the load of a writer for scrolling the writing surface to be reduced by forming the writing surface in a manner being scrolled automatically in accordance with the writing position. SOLUTION: CPU operates to set position being moved downward at αin the Y-axis direction from the writing starting position when writing start is detected (S22: Yes) at a standard position (S24), and when detection is done (S28: Yes) in such that the writing region exceeds the standard position, the lapse of time T from that of the writing stop operation is counted (S30), and when detection is done (S34: Yes) in that it exceeds the setting time T1, a driving signal is outputted to the motor so that the writing surface is scrolled upward at a predetermined distance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an electronic blackboard and a storage medium storing a computer program for controlling the electronic blackboard.

[0002]

2. Description of the Related Art Conventionally, there is known an electronic blackboard having a scroll-type writing surface. This one is
A sheet-like writing surface, provided at an end of the electronic blackboard main body, provided with a roller for winding the writing surface, and a rotation mechanism provided with a handle for rotating the roller,
The writing surface is scrolled to a desired position by rotating the handle. There is also known a motor-driven scrolling operation while the operation switch is pressed.

[0003]

However, in the above-described conventional apparatus, the user has to rotate the handle or operate the switch every time the writing surface is scrolled, so that the operation is troublesome. Is burdensome.

Accordingly, the present invention provides an electronic blackboard that is configured to automatically scroll a writing surface in accordance with a writing position, thereby eliminating a burden on a writer for scrolling a screen, and an electronic blackboard thereof. It is an object to realize a storage medium in which a computer program for controlling a blackboard is stored.

[0005]

According to the present invention, in order to achieve the above object, a writing surface and a function of converting a locus drawn on the writing surface into digital data are provided. In the provided electronic blackboard, reference position setting means for setting a predetermined position on the writing surface as a reference position, and detection means for detecting that a writing area has exceeded a reference position set by the reference position setting means. And scroll means for scrolling the writing surface by a predetermined amount when the detection means detects that the writing area has exceeded the reference position set by the reference position setting means. Adopt technical means.

[0006] In the invention described in claim 2, the scrolling means includes an elapsed time measuring means for measuring an elapsed time since the writing is stopped, and an elapsed time measured by the elapsed time measuring means. Determining means for determining whether or not the time has passed, wherein the determining means determines that the elapsed time has exceeded the predetermined time, and the writing area is set by the reference position setting means by the detecting means. A technical means is employed in which the writing surface is scrolled by a predetermined amount when it is detected that the reference position has been exceeded.

According to a third aspect of the present invention, in the electronic blackboard according to the first or second aspect, the writing direction detecting means for detecting the writing direction, and the writing direction and the scroll direction are stored in association with each other. Storage means, and the scroll means, when the detection means detects that the writing area has exceeded the reference position set by the reference position setting means, the writing direction detection means And reading a scroll direction associated with the writing direction detected from the storage means, and scrolling the writing surface in the read scroll direction by a predetermined amount. .

According to a fourth aspect of the present invention, in the electronic blackboard according to any one of the first to third aspects,
Technical means is employed in which reference position changing means for changing the setting of the reference position is provided.

According to the present invention, a computer program for controlling an electronic blackboard provided with a writing surface and a function of converting a locus drawn on the writing surface into digital data is stored. In the medium, a predetermined position on the writing surface is set as a reference position, and when it is detected that the writing region has exceeded the set reference position, control is performed such that the writing surface is scrolled by a predetermined amount. The technical means that the scroll control program is stored is adopted.

According to a sixth aspect of the present invention, in the storage medium according to the fifth aspect, the scroll control program measures an elapsed time after writing is stopped, and the measured elapsed time is a predetermined time. And that the writing surface is scrolled by a predetermined amount when it is determined that the time has passed and the writing area has exceeded the reference position.

According to a seventh aspect of the present invention, in the storage medium according to the fifth or sixth aspect, the electronic blackboard is provided with storage means for storing a writing direction and a scroll direction in association with each other. The scroll control program detects the writing direction, and when detecting that the writing area has exceeded the reference position set by the reference position setting means, associates the writing direction with the detected writing direction. A technical means is employed in which the read scroll direction is read from the storage means, and the writing surface is scrolled by a predetermined amount in the read scroll direction.

According to an eighth aspect of the present invention, in the storage medium according to any one of the fifth to seventh aspects,
The electronic blackboard is provided with a reference position changing means for changing the setting of the reference position, and the scroll control program is configured to write the reference position when the setting of the reference position is changed by the reference position changing means. A technical means is adopted in which the writing surface is scrolled by a predetermined amount when it is detected that the area has exceeded the changed reference position.

[0013]

According to the present invention, the reference position setting means sets a predetermined position on the writing surface as the reference position, and the detecting means determines that the writing area has exceeded the reference position. And scrolling means scrolls the writing surface by a predetermined amount when the detecting means detects that the writing area has exceeded the reference position. In other words, when the writing position exceeds the reference position, the writing surface can be automatically scrolled by a predetermined amount, so that there is no need to manually rotate the handle or wind the screen by operating the switch as in the related art. . Therefore, the burden on the scribe for scrolling the screen can be eliminated.

In particular, in the invention according to the second aspect, the elapsed time measuring means provided in the scroll means measures the elapsed time after the writing is stopped, and the determining means determines the elapsed time by a predetermined time. Is determined. The scrolling means scrolls the writing surface by a predetermined amount when the determining means determines that the elapsed time has exceeded the predetermined time and the detecting means detects that the writing area has exceeded the reference position. In other words, even when the writing area exceeds the reference position, the writing surface scrolls by a predetermined amount when a predetermined time has elapsed since the writing was stopped, so that the writing surface may scroll during the writing. Can be prevented. For example, if a scribe is writing,
By setting the time required to move from the end of the written sentence to the beginning of the next sentence to the predetermined time,
It is possible to prevent the writing surface from scrolling during writing.

According to the third aspect of the present invention, the writing direction detecting means detects the writing direction, and the storage means stores the writing direction and the scroll direction in association with each other. And
The scroll means, when the detection means detects that the writing area has exceeded the reference position, reads a scroll direction associated with the writing direction detected by the writing direction detection means from the storage means, and reads the scroll direction. The writing surface is scrolled by a predetermined amount in the scroll direction. That is,
In horizontal writing, scroll up and down. In vertical writing, scroll left and right.

Further, according to the invention described in claim 4, since reference position changing means for changing the setting of the reference position is provided,
The reference position can be changed corresponding to the writing start position. Therefore, the writing surface can be automatically scrolled in accordance with the individual difference in the writing start position, so that the writing position can always be maintained irrespective of the individual difference.

According to the fifth aspect of the present invention, a predetermined position on the writing surface is set as a reference position, and when it is detected that the writing area exceeds the set reference position, the writing surface is set to the predetermined position. The electronic blackboard according to any one of claims 1 to 4 can be realized by using a storage medium that stores a scroll control program for controlling scrolling by an amount equal to the number of times. That is, for example, as described in an embodiment of the invention described later, since the control of the electronic blackboard is performed by a CPU built in the electronic blackboard, a storage unit as the storage medium is built in the electronic blackboard. Thereby, the electronic blackboard according to any one of claims 1 to 4 can be realized.

Further, in the invention according to claim 6, the scroll control program measures an elapsed time after the writing is stopped, and determines that the measured elapsed time exceeds a predetermined time. 3. The electronic whiteboard according to claim 2, wherein the writing surface is scrolled by a predetermined amount when it is detected that the writing area has exceeded the reference position. Can be realized.

Further, according to the invention described in claim 7, the scroll control program detects a writing direction and, when detecting that the writing area exceeds a reference position, associates the writing direction with the detected writing direction. The read scroll direction is read from the storage means, and the writing surface is scrolled by a predetermined amount in the read scroll direction. An electronic blackboard can be realized.

Further, in the invention according to claim 8, the scroll control program determines that, when the setting of the reference position is changed by the reference position changing means, the writing area exceeds the changed reference position. Since the writing surface is scrolled by a predetermined amount when detected, the electronic whiteboard according to claim 4 can be realized by using the scroll control program.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of an electronic blackboard according to the present invention will be described below with reference to the drawings. FIG. 1A is an external view illustrating the main configuration of the electronic blackboard according to the embodiment of the present invention. The electronic blackboard 10 is provided with a frame 11, and under the frame 11, stands 13 and 13 are provided.
Is installed. A sheet 12 is stretched on the frame 11. On the surface of the sheet 12, a writing surface 12a for writing with a pen 14 is formed. A control box 20 for controlling the electronic blackboard 10 is provided below the frame 11. The upper and lower ends of the sheet 12 are provided with rollers 1 provided above and below the back surface of the frame 11, as shown in FIG.
6 and 16, and each roller 16 is connected to a motor 15. The rotation of the motor 15 in the direction indicated by the arrow F <b> 3 causes the sheet 12 to scroll in the direction indicated by the arrow F <b> 2. ing. Also, sheet 1
2 is provided with a touch panel 17 for detecting a locus of writing on the writing surface 12a. The touch panel 17 has a touch sensor (FIG. 2) for detecting that the pen 14 has pressed the writing surface 12a. 2 (B), indicated by the numeral 35) are arranged in a matrix. In this embodiment, a stepping motor is used as the motor 15. Further, the motor 15 can rotate in the reverse direction, and can scroll the sheet 12 in the opposite direction (downward) of the arrow F2.

Next, the configuration of the control box 20 will be described with reference to FIG. An operation panel 21 is provided on the front surface of the control box 20, and a power button 22 for turning on and off the power of the electronic whiteboard 10 is provided at the upper right of the operation panel 21. Further, on the left side of the control box 20, an automatic switching button 23 for automatically switching the scroll of the sheet 12 and a manual switching button 24 for manually switching are provided. On the right side of the manual switching button 24, a scroll button 24a pressed to manually scroll the sheet 12 upward, a scroll button 24b pressed to scroll downward, and a scroll button 24c pressed to scroll left. , A scroll 24d to be pressed when scrolling to the right. In this embodiment, as shown in FIG. 1B, since the sheet 12 scrolls up and down, the scroll buttons 24a and 24b for scrolling the sheet 12 up and down are used.
In the case of a configuration in which the sheet 12 scrolls left and right,
The scroll buttons 24c and 24d are used.

On the right side of the automatic switching button 23, a scroll width change button 25a pressed to change the set value of the scroll width for automatically scrolling, and a small button pressed to reduce the scroll width. 25b, and a large button 25c to be pressed to increase the scroll width are provided. Below the scroll width change button 25a, a scroll width setting button 25d to be pressed to set the changed scroll width is provided. I have. Below the reference position setting button 25d, the reference position 1 shown in FIG.
An automatic setting button 26a that is pressed when the position of 2b is automatically set as the writing start position is provided, and a reference position change button 26b that is pressed when the reference position is manually changed is provided on the right side thereof. A reference position setting button 26c to be pressed when setting the position to the reference position is provided. Here, the reference position 12b is a position serving as a reference on the writing surface 12a when the sheet 12 is automatically scrolled. When the writing area exceeds the reference position, the sheet 12 is automatically set to a predetermined position. It is designed to scroll width.

On the right side of the large button 25c, there is provided an LCD (Liquid Crystal Display) 27 for displaying the function of each button when the various buttons are pressed and the operation state of the electronic blackboard 10 by liquid crystal. Below, a clear button 28 for clearing the locus detected by the touch panel 17 and a print button 29 for printing the locus detected by the touch panel 17 on printing paper
Are provided. Further, a slit-shaped discharge port 29a for discharging printed printing paper is formed below the operation panel 21.

Next, the main electrical configuration of the control box 20 will be described with reference to FIG. In the control box 20, handwriting detection,
The CPU 30 for executing various controls and processes such as storage of handwriting, printout of handwriting, scroll control of the sheet 12, and change of the reference position 12b is incorporated. CPU
A ROM 31 stores a computer program for the CPU 30 to execute various controls and processes.
An EEPROM 32 for rewritably storing set values such as a set reference position 12b and a scroll width;
A RAM 33 for temporarily storing the computer program read from the ROM 31 during the operation of the U30 and for temporarily storing the trajectory is connected.

Here, regarding the contents stored in the ROM 31,
This will be described with reference to FIG. ROM31
The computer programs stored in the program include a handwriting detection program 31a for detecting handwriting and a scroll control program 3 for controlling scrolling of the sheet 12.
1b, a reference position change program 31c for changing the reference position 12b, a recording control program 31d for printing out handwriting, and a storage processing program 31e for storing handwriting and set values. I have.

Here, returning to the description of FIG.
A coordinate detection circuit 34 detects a coordinate of a trajectory based on a detection signal detected by the touch sensor 35.
A motor control circuit 36 for controlling the rotation of the motors 15, 15, the various buttons shown in FIG.
And the printer 37 are connected. Further, the control box 20 has a built-in power supply circuit 38 for supplying power to each block shown in FIG.

Next, the contents of main control and processing executed by the CPU 30 will be described with reference to the flowchart of FIG. The CPU 30 includes a coordinate detection circuit 3
4 (step (hereinafter, referred to as S) 10) for detecting handwriting based on the coordinates detected by
Scroll control for controlling scroll 2 (S20)
And a reference position change process for changing the reference position 12b (S
60) and a recording process for printing out the handwriting (S8)
0) and storage processing for storing handwriting, setting values, and the like (S9
0).

Next, the flow of the scroll control executed by the CPU 30 in S20 will be described with reference to the flowchart of FIG. Here, it is assumed that the automatic setting button 26a has been pressed. CPU
When detecting that the writing by the pen 14 has been started based on the detection signal output from the coordinate detection circuit 34 (S22), the reference position 30b is set based on the coordinates indicated by the detection signal (S24). In the present embodiment, if the horizontal direction of the tablet 17 is the X axis, the vertical direction is the Y axis, and the detected coordinates are (X1, Y1),
Y = (Y1 + α) A line parallel to the X axis shown is a reference position 1
2b (see FIG. 1A). That is, the reference position 12b is set at a position vertically lowered by α from the detected coordinates (X1, Y1) in the Y-axis direction. Where α
Is a value slightly smaller than the width of one line when a character is written on the writing surface 12a, that is, a value estimated to be included in the writing area when the next line is written.

When the CPU 30 determines that the writing area has exceeded the reference position 12b, that is, that writing has been performed across the reference position 12b (S28: Yes), the CPU 30 starts the timer T (S30). This timer T is set to CP
It is built in U30, and counts the elapsed time since writing was stopped after it was determined that the writing area exceeded the reference position 12b. Subsequently, when writing is not detected (S32: No), the CPU 30 determines whether or not the elapsed time T has exceeded a preset time T1 (S34). The set time T1 is a time required from the end of writing on this line to the stop of writing until the start of writing on the next line, for example, 1 second. That is, the timing of scrolling is restricted so that the sheet 12 does not scroll during writing.

When the CPU 30 detects that the handwriting has been made (S32: Yes), the CPU 30 resets the timer T,
Again, the timer T starts counting (S30). If the CPU 30 determines that the elapsed time T has exceeded the set time T1 (S34: Yes), the motor control circuit 36
And outputs a driving command to the motor 1 from the motor driving circuit 36.
Drive signals are output to the motors 5 and 15, the motors 15 and 15 rotate in the direction indicated by the arrow F3 (see FIG. 1B), and the sheet 12 scrolls upward (in the direction indicated by the arrow F2) (S38). In the present embodiment, the width of scrolling is set to be slightly wider than one line in consideration of the width between lines. Then, the CPU 30 returns to the standby state for detecting the start of writing (S22), and starts writing (S2).
2: Yes), a new reference position 12b is set based on the writing start position (S24), and the same processing and control as described above are executed (S28 to S38). In this way,
The operation of scrolling the sheet 12, that is, the writing surface 12a upward by one line, is repeated every time one line of writing is completed.

As described above, when the electronic whiteboard 10 of the first embodiment is used, the writing surface 12a can be automatically scrolled. There is no need to operate with. Therefore, the burden on the writer for scrolling the writing surface 12a can be eliminated. In addition, when one-line writing is performed, the writing surface 12a can be automatically scrolled upward by one line, so that writing can always be performed at the same position as the writing start position. Can also reduce the fatigue of the scribe. When the print button 29 is pressed, the CPU 30 executes a recording process (S60 in FIG. 4), and the handwriting stored in the RAM 33 is printed on printing paper by the printer 37 (FIG. 2B), and the printed image is printed. Printed paper is discharged from the paper discharge port 29a (FIG. 2).
(A) is discharged outside.

Next, an electronic blackboard according to a second embodiment of the present invention will be described with reference to FIG. FIG. 6 is a flowchart showing a part of a process executed by a CPU built in the electronic blackboard of the second embodiment. The electronic blackboard of the second embodiment is characterized in that the scroll direction can be automatically changed depending on the writing direction. Note that the reference position 12b is set at the center of the writing surface along the X-axis direction. Further, the description of the same components as those in the first embodiment will be omitted, and the description will be focused on the portions having different configurations.

First, the ROM 31 stores a direction table 31f shown in FIG. Direction table 3
1f is configured so that the writing direction and the scroll direction are associated with each other. When the writing direction is downward, that is, writing from left to right along the X axis, and then writing the next line below, the scroll direction is up, and vice versa, the writing direction is up Indicates that the scroll direction is down. CPU 30
Detects the start of writing (S22: Yes), detects the writing direction based on the coordinates output from the coordinate detection circuit 34 (S26). In the present embodiment, the writing area of the line where writing is completed is stored, and if the writing area of the next line is located below the stored writing area, the writing direction is set to be downward. If it is determined that it is located above the stored writing area, it is determined that the writing direction is upward.

When the CPU 30 detects that the writing area has exceeded the reference position 12b (S28: Ye)
s), the timer T is started (S30), and the non-written state continues (S32: No), and the elapsed time T is equal to the set time T.
If it exceeds 1 (S34: Yes), the direction table 31f
, The writing surface 12a is scrolled in the scroll direction associated with the writing direction detected in S26 (S38). In other words, when writing is performed downward from a position above the reference position 12b, scrolling is automatically performed upward, and when writing is performed upward from a position below the reference position 12b. Automatically scrolls down.

As described above, if the electronic blackboard 10 of the second embodiment is used, the scroll direction can be automatically changed to the optimum direction depending on the writing direction, and therefore, the writing position is hardly written by scrolling. It is possible to always maintain a position where writing can be easily performed while avoiding a situation where the position is changed.

Next, an electronic blackboard according to a third embodiment of the present invention will be described with reference to FIG. The electronic blackboard of the third embodiment is characterized in that the reference position can be changed. FIG.
9 is a flowchart showing a reference position changing process executed by a CPU incorporated in the electronic blackboard of the third embodiment to change the reference position. Since the configuration is the same as that of the first embodiment except for the reference position changing process executed by the CPU 30, the description of the same configuration will be omitted. Also, scroll buttons 24a and 24b are used as buttons for determining the reference position.

The CPU 30 has a reference position change button 26b
Is detected (S62: Yes), the current reference position is displayed on the LCD 27 as a graphic, a numerical value, or the like (S64). Subsequently, when an operation is performed by using the scroll button 24a or the scroll button 24b, the CPU 30 detects the operation amount (S66), and until the CPU 30 detects that the reference position setting button 26c is pressed (S6).
8: Yes), the reference position changed by the operation is displayed on the LCD
27 (S68: No). And CPU3
If 0 is detected that the reference position setting button 26c has been pressed (S68 Yes), the reference position is changed to the position operated in S66 (S70).

As described above, if the electronic blackboard 10 of the third embodiment is used, the writing surface can be automatically scrolled in accordance with the individual difference in the writing start position. Irrespective of this, it is possible to always maintain a position where writing is easy.

Next, an electronic blackboard according to a fourth embodiment of the present invention will be described with reference to FIG. The electronic blackboard of the fourth embodiment is characterized in that the scroll width can be changed. FIG. 8 is a flowchart showing a scroll width changing process executed by the CPU incorporated in the electronic whiteboard of the fourth embodiment to change the scroll width. The CPU 30
Since the configuration is the same as that of the above-described first embodiment except for the scroll width changing process executed by, the description of the same configuration is omitted.

The CPU 30 has a scroll width change button 2
When it is detected that 5a is pressed (S42: Yes),
The current scroll width is displayed on the LCD 27 as a figure or a numerical value (S44). Subsequently, the CPU 30 sets the small button 2
When the operation using the 5b or the large button 25c is performed, the operation amount is detected (S46), and until the scroll width setting button 25d is pressed (S48:
Yes), the change state of the scroll width by the operation is displayed on the LCD
27 (S48: No). And CPU3
When 0 is detected that the scroll width setting button 25d is pressed (S48 Yes), the scroll width is changed to the amount operated in S46 (S50).

As described above, since the scroll width can be changed by using the electronic blackboard 10 of the fourth embodiment, it is possible to correspond to the amount of the writing area to be displayed before scrolling. it can. For example, writing surface 1
When it is desired to scroll by half after writing in a half area of 2a, the reference position 12b is set at the center of the writing surface 12a, and the reference position 1b is shifted from a position above the writing surface 12a.
By writing toward 2b, when the writing area is exceeded, the upper half of the writing surface 12a can be scrolled upward, so that the written area can be displayed until scrolling.

In each of the above embodiments, the electronic blackboard of the present invention has been described as having a configuration in which the writing surface 12a is scrolled in the vertical direction. It goes without saying that the invention can be applied. In each of the above embodiments, the configuration in which the sheet 12 is provided so as to be scrollable on the tablet 17 is described as a representative. However, by using a large-sized liquid crystal tablet, both the vertical and horizontal directions can be scrolled. It is also possible to adopt a configuration in which the horizontal scrolling is performed automatically (when one character is written and then the next character is written in the horizontal direction), and the vertical scrolling is performed to the right. Furthermore, in each of the above embodiments, the case where one reference line 12b is set has been described, but a plurality of reference lines 12b may be set.

The step S24 executed by the CPU 30 functions as the reference position setting means according to the first aspect of the present invention.
8 functions as detection means, and S30 to S38 function as scroll means. In addition, S executed by the CPU 30
30 functions as elapsed time measuring means, S34 functions as determining means, and the set time T1 corresponds to a predetermined time. Further, the ROM 31 corresponds to the storage medium described in claim 5, and the direction table 31f stored in the ROM 31 corresponds to storage means described in claim 3. The scroll buttons 24a and 24b, the reference position change button 26b, and the reference position setting button 26c correspond to the reference position change unit according to the fourth embodiment.
S62 to S70 executed by the function of the reference position change means.

[0045]

As described above, claims 1 to 8 are as described above.
According to the invention described in the above, reference position setting means for setting a predetermined position on the writing surface as a reference position, detection means for detecting that the writing area has exceeded the reference position, and the writing area Scroll means is provided for scrolling the writing surface by a predetermined amount when it is detected that the writing surface has been exceeded, so that when the writing position exceeds the reference position, the writing surface can be automatically scrolled by the predetermined amount. Therefore, as usual, you can manually rotate the handle to wind up the screen,
Since there is no need to perform a switch operation, the burden on the scribe to scroll the screen can be eliminated.

In particular, according to the second aspect of the present invention, it is determined that the elapsed time from the stoppage of writing has exceeded a predetermined time, and that the writing area has exceeded the reference position. A scroll means for scrolling the writing surface by a predetermined amount, even when the writing area exceeds the reference position, the writing surface is scrolled by a predetermined amount when a predetermined time has elapsed since the writing was stopped. Can be done. Therefore, it is possible to prevent the writing surface from scrolling during writing.

According to the third aspect of the present invention, when it is detected that the writing area has exceeded the reference position, the scroll direction associated with the writing direction detected by the writing direction detecting means is determined. Since the scroll means for scrolling the writing surface by a predetermined amount is provided, it is possible to avoid a situation where the writing position is difficult to write and to maintain a position where writing is easy.

Further, according to the fourth aspect of the present invention,
Since the reference position changing means for changing the setting of the reference position is provided, the reference position can be changed corresponding to the writing start position. Therefore, the writing surface can be automatically scrolled in accordance with the individual difference in the writing start position, so that the writing position can always be maintained irrespective of the individual difference.

According to the fifth aspect of the present invention,
A scroll control program for setting a predetermined position on the writing surface as a reference position, and controlling to scroll the writing surface by a predetermined amount when detecting that the writing region has exceeded the set reference position is stored. Since the configuration is a storage medium, the electronic blackboard according to any one of claims 1 to 4 can be realized by using the storage medium.

According to the invention described in claim 6, the scroll control program measures an elapsed time from when writing is stopped, and determines that the measured elapsed time exceeds a predetermined time. And a scroll control unit configured to scroll the writing surface by a predetermined amount when it is detected that the writing area has exceeded the reference position. An electronic blackboard can be realized.

Further, according to the invention described in claim 7,
The scroll control program detects a writing direction,
When it is detected that the writing area has exceeded the reference position, the scroll direction associated with the detected writing direction is read from the storage means, and the writing surface is scrolled by a predetermined amount in the read scroll direction. With such a configuration, the electronic whiteboard according to the third aspect can be realized by using the scroll control program.

According to the present invention, when the reference position is changed by the reference position changing means, the scroll control program causes the writing area to exceed the changed reference position. Since it is configured to scroll the writing surface by a predetermined amount when detecting that
By using the scroll control program, the electronic blackboard according to claim 4 can be realized.

[Brief description of the drawings]

FIG. 1A is an external view illustrating a main configuration of an electronic blackboard according to an embodiment of the present invention, and FIG. 1B is an explanatory view illustrating a winding mechanism of a sheet 12;

FIG. 2A is an explanatory diagram illustrating a configuration of a control box 20, and FIG. 2B is an explanatory diagram illustrating a main electrical configuration of the control box 20.

FIG. 3A is an explanatory diagram showing storage contents of a ROM 31, and FIG. 3B is an explanatory diagram showing a configuration of a direction table.

FIG. 4 is a main flowchart showing main processing executed by a CPU 30.

FIG. 5 is a flowchart illustrating scroll control executed by a CPU 30 according to the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating scroll control executed by a CPU 30 according to a second embodiment of the present invention.

FIG. 7 is a flowchart showing a reference position changing process executed by a CPU 30 according to a third embodiment of the present invention.

FIG. 8 is a flowchart illustrating a scroll width changing process executed by a CPU 30 according to a fourth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 electronic blackboard 12 sheet 12a writing surface 12b reference position 14 pen 15 motor 16 roller 17 tablet 20 control box 21 operation panel 25a scroll width change button 26b reference position change button 27 LCD 30 CPU 31 ROM 31f direction table (storage means) 34 coordinates Detection circuit

Claims (8)

[Claims] 1. An electronic blackboard provided with a writing surface and a function of converting a locus drawn on the writing surface into digital data, a reference position setting for setting a predetermined position on the writing surface as a reference position. Means, detecting means for detecting that the writing area has exceeded the reference position set by the reference position setting means, and the detecting means has caused the writing area to exceed the reference position set by the reference position setting means. And a scroll means for scrolling the writing surface by a predetermined amount when this is detected. 2. The scroll means comprises: an elapsed time measuring means for measuring an elapsed time since writing is stopped; and an elapsed time measured by the elapsed time measuring means.
Determining means for determining whether or not a predetermined time has been exceeded, wherein the determining means determines that the elapsed time has exceeded the predetermined time, and the detecting means sets the writing area to the reference position setting means. 2. The electronic whiteboard according to claim 1, wherein the writing surface is scrolled by a predetermined amount when it is detected that the reference position set by the user has exceeded the reference position. 3. A writing direction detecting means for detecting a writing direction, and a storage means for storing the writing direction and a scroll direction in association with each other, wherein the scroll means is configured to perform the writing by the detecting means. When it is detected that the region has exceeded the reference position set by the reference position setting means, the scroll direction associated with the writing direction detected by the writing direction detection means is read from the storage means. 3. The electronic blackboard according to claim 1, wherein the electronic writing board is configured to scroll the writing surface by a predetermined amount in the read scroll direction. 4. The electronic blackboard according to claim 1, further comprising a reference position changing means for changing a setting of the reference position. 5. A storage medium storing a computer program for controlling an electronic blackboard provided with a writing surface and a function of converting a locus drawn on the writing surface into digital data, wherein: A predetermined position of the reference position is set as a reference position, and when it is detected that the writing area exceeds the set reference position, a scroll control program for controlling the writing surface to scroll by a predetermined amount is stored. A storage medium characterized by the above-mentioned. 6. The scroll control program measures an elapsed time since writing is stopped, determines that the measured elapsed time exceeds a predetermined time, and determines that the writing area is at the reference position. The storage medium according to claim 5, wherein the writing surface is configured to scroll the writing surface by a predetermined amount when it is detected that the number of characters exceeds the limit. 7. The electronic blackboard is provided with storage means for storing a writing direction and a scroll direction in association with each other, wherein the scroll control program detects the writing direction and sets the writing area to the reference. When it is detected that the reference position set by the position setting means has been exceeded, a scroll direction associated with the detected writing direction is read from the storage means, and the writing surface is read in the read scroll direction. 7. The electronic blackboard according to claim 5, wherein the electronic blackboard is configured to scroll by a predetermined amount. 8. The electronic blackboard includes a reference position changing unit for changing the setting of the reference position, wherein the scroll control program changes the setting of the reference position by the reference position changing unit. 8. In the case, when the writing area is detected to have exceeded the changed reference position, the writing surface is configured to scroll by a predetermined amount. The storage medium according to any one of the above.