JPH0465964A - Electronic blackboard device - Google Patents

Abstract

PURPOSE:To prevent a written image from being miserased by providing the electronic blackboard device with the 2nd control part consisting of a circuit for detecting an uncopied picture and an alarm generating circuit for generating an alarm indicating the uncopied picture from an alarm generating means. CONSTITUTION:Data are written in a hand-writing screen A, the screen A is directly shifted to a hand-writing screen B without copying the screen A, data are written and copied in/from the screen B, and when a feed switch 12 is depressed to return the screen to the A, an output signal 143 from an OR circuit 43 is validated, the alarm generating circuit 35 is driven, and a voice message indicating the uncopied state of the screen A in the case of a voice LSI, or an alarm sound such as a chime or buzzer in the case of a frequency generator is generated from a speaker 50. Since the hand-writing screen in which data are to be written can be recognized as an unrecorded screen, a written image can be prevented from being miserased.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention optically reads images such as characters and figures written on a writing medium that functions as a blackboard, and based on the read image data. The present invention relates to an electronic blackboard device that records images on recording paper.

[Conventional technology]

FIG. 3 is a schematic block diagram showing an example of the configuration of a conventional electronic whiteboard device. Here, the electronic whiteboard device is equipped with an endless medium having two surfaces A and B for writing images. will be explained using an example.

In the figure, 1 is a sheet-like writing medium for writing images such as letters and figures with a writing implement such as a felt pen, and has two writing screens (image writing surfaces) A and B.
It is stretched endlessly by a pair of parallel cylindrical rollers 2.

3a and 3b are respective writing screens A of this writing medium 1.

This is a mark for screen recognition provided at a predetermined position of B. By detecting these marks 3a and 3b with the optical sensor 4, the mark detection signal 101 is enabled, and it is determined whether writing screen A or B is used for writing. Reading and recording (copying)
Recognize whether it is in operation.

5 is an image reading unit that optically reads the image written on the writing medium 1; 6 is a reading lens that focuses the image on the image reading unit 5; the image data read here is digital information; The data is sent to the memory 7 via the data bus 102 and stored therein.

Reference numeral 8 denotes a recording device that prints and records the image data sent from the memory 7 via the data bus 103 onto recording paper or the like.

Reference numeral 9 denotes a motor for rotationally driving the roller 2 on which the writing medium 1 is stretched. Connected to each operation button.

12 and 13 are a forward switch and a copy switch provided on the operation panel 11, and the forward switch 12 is an operation for moving the writing screens A and B of the writing medium 1 from the front side to the back side. When the operator presses this feed switch 12, a motor drive signal 104 for driving the motor 9 is enabled, and this signal causes the motor 9 to rotate the roller 2 in a predetermined direction to write. Feed the medium 1.

Further, the copy switch 13 is an operation switch for recording the image written on the writing medium 1 on recording paper, and when the operator presses this copy switch 13, the image written on the writing screen A or B can be copied. A valid ticket is rubbed with a trigger signal 105 for recording in the recording device 8. Then, the roller 2 is rotated in a predetermined direction via the motor 9 based on this signal, the writing medium 1 is fed, and the desired writing screen A or B is read by the image reading section 5 and recorded by the recording device 8.

Next, the internal configuration of the control section 10 will be explained. Note that signals are assumed to be positive logic circuits unless otherwise specified, and clock inputs to flip-flops are not shown, but IMH
It is assumed that a clock with a frequency of approximately z is used, and a power-on reset at power-on is used for the reset input.

21, 22, and 23 are flip-flops.

First, the flip-flop 21 receives a signal 1 that becomes valid under the logical sum condition of the presses of the feed switch 12 and the copy switch 13.
06 is held, and its output signal 107 becomes a trigger signal for starting the motor 9 and starting the operation of the image reading section 5.

Furthermore, the flip-flop 22 holds a signal 105 that becomes valid when the copy switch 13 is pressed, and its output signal is input to the delay circuit 24 .

Incidentally, both the flip-flops 21 and 22 are reset by the mark detection signal 1010 and the anti-light signal 108.

The flip-flop 23 is an AND circuit 2 which will be described later.
It holds the output signal 109 from 6 and outputs the signal 110. This output signal 110 is input to the memory 7 that stores image data and the recording device 8, and serves as a trigger signal to start data transfer from the memory 7 to the recording device 8.

25 is an AND circuit of the motor activation signal 104 caused by pressing the feed switch 12 and the copy switch 13 and the trigger signal 105 for recording image data;
Output. This output signal 106 is input to the flip-flop 21.

26 is an AND circuit of the mark detection signal 101 outputted by detecting the marks 3a, 3b on the writing medium 1 and the output signal 111 of the delay circuit 24, and outputs a signal 109. This output signal 109 is a signal indicating that the copy switch 13 has been pressed and the movement of the writing screen A or B to be copied has been completed, that is, the reading of the writing screen A or B to be copied has been completed.

As described above, this signal 109 causes the image data of the writing screen A or B of the writing medium 1 to be transferred to the recording device 8 via the memory 7, and when the recording of all data is completed in this recording device 8, the recording device A negative logic recording end signal 112 is output from 8, and this signal 112 resets the flip-flop 23, and as a result, the memory 7
The output signal 110 from the flip-flop 23, which is a trigger signal for starting data transfer from the recording device 8 to the recording device 8, is cleared.

Next, the recording operation will be explained using FIG. 4.

Here, an example of a series of operations will be described in which the forward switch 12 is pressed to rotate the writing screen A to the writing screen B, and the copy switch 13 is pressed to copy the writing screen B.

Fig. 4 is a timing chart of a conventional recording operation, with the horizontal direction indicating time, and after the power is turned on (on), writing on the writing screen A is not possible while the message "Writing screen A er" is displayed. Similarly, ``Writing screen B II
The period indicated by `` indicates that writing can be written on the writing screen B. Further, "Rotating l'" indicates that the screen is being moved from writing screen A to writing screen B or from writing screen B to writing screen A by pressing the feed switch 12 or copy switch 13. There is.

Now, turn on the power, write on writing screen A while it shows "Writing screen A fl", and when writing is finished, write on writing screen B without copying this writing screen A. , press the feed switch 12.

When the signal 104 is output by pressing the feed switch 12, the flip-flop 21 holds this signal 104 and sends the output signal 107 to the image reading section 5. memory 7,
Input to motor 9.

The roller 2 is rotationally driven by the activation of the motor 9, the writing screens A and B rotate and move, and the optical sensor 4 detects the writing screen B.
When the mark 3b is detected, the mark detection signal 101 becomes valid.

Then, the flip-flop 21 is reset at the timing of the inverted signal 108 of the mark detection signal 101, and the writing screen B becomes ready for writing.

Next, the operation of writing on the writing screen B and copying the writing screen B after the writing is completed will be described.

When the copy switch 13 is pressed, the flip-flop 2
1 and 22 maintain this state. The output of the flip-flop 21 rotates the roller 2 holding the writing medium 1 by activating the motor 9 in the same way as when the feed switch 12 is pressed, and the writing screen B is transferred to the image reading section. 5, and serves as a trigger signal to send the read image data to the memory 7 via the data bus 102 and store it therein.

Then, the mark detection signal 101 is reset by the inverted signal 108.

On the other hand, the output of the flip-flop 22 is delayed by a delay circuit 24, and the mark detection signal 101 is ANDed by an AND circuit 26.

The output signal 109 of the AND circuit 26 is held by the flip-flop 23 and serves as a trigger for data transfer to the memory 7 and recording device 8 via the data bus 103 and recording output.

When the recording output ends, the flip-flop 23 is reset by a recording end signal 112 output from the recording device 8.

In this way, the feed switch 12 and the copy switch 1
By pressing 3, the writing screen AB can be rotated, moved, and copied.

[Problem to be solved by the invention]

However, according to the above-mentioned conventional technology, for example, writing screen A (or B) on which an image has been written is moved to the next writing screen B (or A) without copying, writing is performed, and the original writing screen is returned again. When returning to A (or B),
There is a problem in that even though this writing screen A has not been copied yet, it is often forgotten and erased with an eraser.

The present invention has been made in order to solve the above-mentioned problems, and eliminates the problem of erasing the image written on the writing screen A or B even though it has not been copied, and eliminates the error in the written image. An object of the present invention is to provide an electronic whiteboard device that prevents erasure.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention automatically detects uncopied screens and notifies the user of this with an alarm to prevent accidental deletion. In other words, the writing medium is made of a material on which images such as characters and figures can be written and erased, has a plurality of writing screens, and holds the writing screens in a movable manner; Each writing screen is forwarded by pressing the feed switch, and the image written on the writing screen is optically read by pressing the copy switch, and the recording device records the image from this read image data. In an electronic blackboard device equipped with a first control unit that controls the device to reduce the size and record it on recording paper, the writing screen on which the image is written is sent to the next screen in an uncopied state, and then the same writing is performed again. When the screen is returned to a writable state, there is a detection circuit that detects that the writing screen is an uncopied screen that has not been copied yet, and a detection circuit that detects that the writing screen is an uncopied screen that has not been copied yet. A second control section is provided which includes an alarm generation circuit that causes the alarm ordering means to generate an alarm indicating a certain fact.

[Function] According to the above-mentioned configuration, an image is written on a certain writing screen once, the image is moved to the next screen in an uncopied state, and on this next writing screen, the image is written and copied, or the image is moved to the next screen. send etc.

Then, when returning to the writing screen where the image has been written but not yet copied, the detection circuit detects that this writing screen has not yet been copied.

Based on this detection result, the alarm generation circuit generates an alarm sound indicating that the screen has not been copied via the alarm generation means.

With this alarm sound, the user recognizes that the writing screen that he was trying to erase is an uncopied screen. As a result, if an image has already been written on the writing screen that you are trying to erase, an alarm sound will tell you whether the image has not been copied yet, and you can avoid accidentally erasing an image that has not been copied yet. To prevent.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a control block diagram showing an embodiment of the present invention. As in the conventional example, an electronic blackboard device having two writing screens A and B and an endless writing medium will be described as an example.

In addition, in this FIG. 1, other than the control unit for preventing the occurrence of uncopied surfaces described below and the reset switch provided on the operation panel, in other words, the moving operation of the writing medium 1 and the copying operation of the writing screens A and B. Since the control blocks such as the above are almost the same as those in the conventional example shown in FIG. 3, their explanation will be omitted here.

In FIG. 1, 14 is a reset switch provided on the operation panel 11, and 15 is a second control unit equipped with a circuit for preventing the occurrence of erroneously erased surfaces. It is separate from the first control section 10 that controls the operation of reading images written on the writing screens A and B of the writing medium 1 and recording them on recording paper.

Moreover, the reset switch 14 resets the flip-flop inside the second control section 15 by pressing it.

The internal configuration of the second control section 15 will be explained below.

31 is a binary counter, which is counted up by the inverted signal 10B of the mark detection signal 101. In addition, in this example, the writing screen of the writing medium worker is A.

Since there are two sides of B, a binary counter is used, but if the writing screen is n-side, of course an n-ary counter is used.

The outputs of the binary counter 31 are signals 132 and 133,
When the signal 132 is valid, the writing screen A is in a writable state. Also, when the signal 133 is valid, the writing screen B
indicates a writable state.

32 is a flip-flop, and when the feed switch 12 is pressed down, the output signal 104 is held, and the reset is performed using the signal 108.

33.34 are flip-flops at J-, set by signals 136 and 137, respectively, and signals 135.13
Cleared by 8. Note that in the case of an electronic blackboard device having n writing screens, n flip-flops are required for this J-.

35 serves as a display means for generating an alarm sound or the like from a speaker 50 by detecting a signal 143 indicating that either writing screen A or B has not been copied, and informing the operator that the writing screen has not been copied. This is an alarm generation circuit. Although not shown, this alarm generation circuit 35 consists of a speaker drive circuit and an audio LSI or a frequency generator. In the case of an audio LSI, a predetermined message recorded in advance, such as "This page has not been copied yet. A voice alarm such as ""," or, in the case of a frequency generator, a chime or a buzzer sound is generated from the speaker 50 to notify the operator that the surface has not been copied.

37 to 40 are AND circuits, and the respective signals, that is, the AND circuit 37, the signals 131 and 132, and the AND circuit 3
8 is the signal 132 and 134 . The AND circuit 39 receives the signal 133
and 134, and the AND circuit 40 receives the signals 134 and 131.
The logical product of the signals 135 and 13 is taken in order.
6. Output 137138.

41. 42 is a three-person AND circuit, which receives signals 132, 139, and 144, and signals 133, 140, and 144, respectively.
, and outputs signals 141 and 142.

Further, 36 and 43 are OR circuits, and one OR circuit 36 outputs the output signal 105 when the copy switch 13 is pressed.
and the output signal 130 by pressing the reset switch 14,
The other logical sum circuit 43 is the three-person logical product circuit 4.
The output signals 141 and 142 of 1 and 42 are ORed.

Next, signals will be explained.

The signal 131 is a signal that becomes valid via the OR circuit 36 when the copy switch 13 or the cent switch 14 is pressed, and is input to the AND circuit 37 or 40.

The signal 134 is the signal 10 indicating that the feed switch 12 is pressed.
4 is held by the flip-flop 32,
135 is its inverted signal. And this signal 135
becomes effective when the copy switch 13 or the reset switch 14 is pressed while the writing screen A is in a writable state.

Conversely, the signal 138 becomes valid when the copy switch 13 or the reset switch 14 is pressed when the writing screen B is in a writable state.

The signal 136 is a signal that becomes valid when the writing screen A is in a writable state and the feed switch 12 is pressed.
Conversely, the signal 137 is a signal that becomes valid when the feed switch 12 is pressed when the writing screen B is in a writable state.

Signal 141 is a signal that becomes valid via the three-man logical AND circuit 41 when writing screen A is uncopied and becomes ready for writing again.Similarly, signal 142 is a signal that becomes valid when writing screen B is uncopied. When this is the case, this is a signal that becomes valid via the three-man logical AND circuit 42 when the write is enabled again.

Further, a signal 143 is a signal indicating the logical sum of the signals 141 and 142, and is input to the alarm generating circuit 35.

Next, the operation of this embodiment will be explained with reference to the timing chart of this embodiment shown in FIG. Note that this operation follows the operation sequence explained in the conventional example, that is, first, the writing screen A
, move to writing screen B without copying writing screen A, continue writing on writing screen B, copy writing screen B, and then move to writing screen A again. Returning to , when the operation when the writing screen A is in a writable state is executed, the operation of generating an alarm from the speaker 50 indicating that the writing screen A has not been copied is shown.

In FIG. 2 as well, the horizontal axis shows the passage of time as in the conventional case, and the vertical direction shows the operation from the feed switch 12 to the data bus 103, that is, from turning on the power to copying the image. The series of operations is similar to the conventional one shown in FIG.

A control operation for detecting an uncopied surface and generating an alarm will be described below.

When the feed switch 12 is pressed down, the output signal 134 of the flip-flop 32 becomes valid and is reset by the mark detection signal 101 via the inverter circuit 27 with the inverted signal 108 .

The flip-flop 33 at J- is also set at this timing, and the output signal 139 to the three-person AND circuit 41 becomes valid and held.

Then, when the writing on the writing screen B is completed and the copy switch 13 is pressed to copy it, the operation of outputting the image data of the writing screen B from the recording device 8 is as follows.
The operation is similar to that described in the conventional example.

Therefore, when the feed switch 12 is pressed to return to the writing screen A again, the output signal 134 of the flip-flop 32
becomes valid and is reset at the timing of the mark detection signal 101. At this time, the output signal 1 of the binary counter 31
32 is rQ because writing screen B is ready for writing.
, that is, it is invalid, but when the writing medium 1 rotates and moves and the writing screen A becomes a writable state, it becomes "1", that is, valid.

As a result, the output signal 141 of the three-person logical product circuit 41
is the output signal 132 from the binary counter 31 and 1. J
Since the output signal 139 from the -K flip-flop 33 and the output signal 144 from the flip-flop 32 are all valid, they become valid and are input to the OR circuit 43.

Therefore, the output signal 143 from the OR circuit 43 becomes valid, the alarm generation circuit 35 operates, and in the case of the audio LSI, a voice message indicating that the writing screen A has not been copied is sent to the frequency generator. In this case, an alarm sound such as a chime or buzzer is generated.

This alarm sound makes the user of the electronic whiteboard device aware that the writing screen A has not been copied yet.

Accordingly, when the user presses the reset switch 14 provided on the operation panel 11, the generation of the alarm sound is reset, and when the writing screen A is to be copied, the user presses the copy switch 13 to copy.

This copying operation is the same as the copying operation of writing screen B described in the prior art and is unpaid.

In the above-described embodiment, the case where the writing screen A has not been copied has been described, but the same applies even if the writing screen B has not been copied. In other words, when the uncopied writing screen is B, the signal 133 from the binary counter 31 becomes valid, and the output signal 14 of the flip-flop 34 is applied to J-.
0, the output signal 144 of the flip-flop 32 is also valid, and as a result, the output signal 14 of the three-person AND circuit 42
2 becomes valid, and the signal 143 of the OR circuit 43 generates an alarm sound indicating that the writing screen B has not been copied.

Furthermore, although the above-mentioned reset switch 14 is a switch for canceling the alarm sound from the speaker 50, the present invention is not limited to this. It is also possible to set the generation time of the alarm sound, and then automatically stop the alarm sound after the set time has elapsed.

In addition, although the description has been made assuming that there are two writing screens, A and B, if there are n writing screens, the binary counter should be changed to an n-ary counter, and J-
This can be handled by providing n flip-flops.

[Effects of the Invention] As explained above, according to the present invention, there is provided a writing medium having a plurality of movable writing screens, and an image written on the writing medium is optically read and recorded on recording paper by a recording device. In an electronic whiteboard device equipped with a first control unit that controls the device for recording, the writing screen on which an image has been written is sent to the next screen in an unrecorded state, and then the same writing screen is made ready for writing again. A detection circuit detects that the writing screen is an unrecorded screen that has not been recorded yet when it is returned, and a second detection circuit generates an alarm to indicate that it is an unrecorded screen when it is detected that it is unrecorded. It was decided to provide a second control section consisting of an alarm generating circuit which is generated by the alarm generating means.

As a result, the user of the electronic whiteboard device can hear the alarm sound and recognize that the writing screen on which he or she was trying to write is an unrecorded screen, and an image has already been written on the writing screen on which he or she was trying to write. In this case, it is possible to provide an excellent electronic blackboard device that can record all images without error, without accidentally erasing the image as in the conventional case.

[Brief explanation of the drawing]

FIG. 1 is a control block diagram showing one embodiment of the present invention, and FIG.
3 is a schematic block diagram showing a configuration example of a conventional electronic blackboard device, and FIG. 4 is a timing chart of a recording operation in the conventional example. 33, 3 37-4 41, 4 B...Writing screen 0...First control section 2...Forward switch 3...Copy switch 5...Second control section 1...2 Advance counter 2...Flip-flop 4...Flip-flop 5...Alarm generation circuit 3...OR circuit 0...AND circuit 2...AND circuit 0...Speaker

Claims (1)

[Claims] 1. A writing medium made of a material on which images such as characters and figures can be written and erased, has a plurality of writing screens, and holds the writing screens in a movable manner, and is operable. An electronic blackboard comprising a first control unit that optically reads an image written on the writing screen by operating a switch, and controls a device to record the read image data on recording paper using a recording device. In the device, when a certain writing screen on which an image has been written is sent to the next screen in an unrecorded state, and then the same writing screen is returned to a writable state, the writing screen becomes an unrecorded screen where no image has been recorded yet. a second control unit comprising a detection circuit that detects that the screen is unrecorded; and an alarm generation circuit that generates an alarm indicating that the screen is an unrecorded screen from the alarm display means when the detection circuit detects that the screen is unrecorded. An electronic whiteboard device characterized by being provided with.