JPH03215100A - Electronic blackboard - Google Patents

Abstract

PURPOSE:To simplify the input in the case of drawing the same manuscript data by storing the image data from a manuscript data input means and/or a blackboard sheet data input means in an image memory means if necessary and selectively applying the same to at least one of a recording paper drawing means, a blackboard sheet drawing means and a transfer means. CONSTITUTION:The manuscript data from an image scanner 2 inputting manuscript data and/or the image data from a CCD line sensor 24 inputting the drawing data of a blackboard sheet 1 are stored in the desired frame memory of a memory 43 if necessary by operating the operation key of an operation panel 7. Further, the desired memory among the manuscript data from the image scanner 2, the drawing data of the blackboard sheet 1 from the CCD line sensor 25 and the drawing data stored in the memory 43 is selectively applied to a printer 3 and/or a recording head 25 and a transfer means 39 can be selectively operated. By this method, the drawing input in a case displaying the same drawing data on the blackboard sheet or in a case applying hard copy to recording paper can be simplified.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention forms an electrostatic latent image on an electrostatically recordable electronic display member using an electrostatic recording head, and then converts it into a visible image using toner. The present invention relates to an electronic blackboard on which images are displayed.

[Summary of the invention]

This invention stores the image information from the manuscript information input means or the blackboard sheet information input means in the image storage means as needed, and stores the image information from the manuscript information input means or the blackboard sheet information input means or the image storage means. By selecting at least one of the image information of In addition to simplifying input when drawing manuscript information on a blackboard sheet, the image quality does not deteriorate even if the drawings on the blackboard sheet are repeatedly added and corrected.

[Conventional technology]

Conventionally, the applicant has proposed an electronic blackboard that has a function of hard copying handwritten characters on a blackboard sheet, and also has a display function that can read manuscript information and write and display this manuscript information on the blackboard sheet. (Patent Application No. 157176/1982).

FIGS. 9 and 10 show the external structure and internal structure of a conventional electronic blackboard with a display function of this type. As shown in FIG. 9, the external appearance of this electronic blackboard is covered with a full force bar 100, and a blackboard sheet 101 made of an electrostatic recording medium is exposed from the front window of this cover 100.

An image scanner 102 is installed at the bottom of the front of the Caher 100.
is built-in. When reading an original and displaying the read original on the blackboard sheet 101, the original 105 is inserted into the original insertion slot 103, and the image scanner 102 reads the original information of the original 105.

When the document information is read, the document 105 is delivered to the ejection port 104.
is discharged from.

When making a hard copy of the drawing written on the blackboard sheet 101, the drawing written on the blackboard sheet 101 is recorded by the printer 106, and this recording paper 107 is ejected from the printout outlet 108.

A leg portion 100 is fixed to the lower end of the cover 100. Casters 109 are attached to the legs 100. The casters 109 allow the electronic blackboard to be moved freely.

FIG. 10 shows the internal structure of this electronic blackboard with display function. As shown in FIG.
1 is arranged to be endlessly transportable via a feed motor 112 and a drive roller 113.

Opposed to the blackboard sheet 101 is a recording head 116 consisting of a writing electrode or stylus electrode section 114 and a control electrode section 115, an AC static eliminator 117, a cleaning blade 118, and a CCD line sensor 120 equipped with a lens system 119. , and a reflecting mirror 121 are provided. Also,
A developing device 122 that supplies toner is provided.

When using this electronic blackboard normally, the blackboard sheet 101
Characters and the like are written on the writing surface of the 0 surface using, for example, a felt pen or the like. When copying the drawing written on the blackboard sheet 101, the blackboard sheet 101 is transferred, and on the back side of this device, the drawing written on the blackboard sheet 101 is copied to the reflection mirror 121 and the lens system 119.
is read by the CCD line sensor 120 via the CCD line sensor 120.

Then, the drawings written on the blackboard sheet 101 are recorded on a predetermined recording paper 107 by the printer 106 using the xerography method or the like. This recording paper 107 is discharged from a printout discharge port 108.

When displaying a read original on the blackboard sheet l01 by electrostatic recording, the original 105 is inserted through the insertion slot 103, and the image scanner 102 reads the original information. An electrostatic latent image screen based on the read document information is recorded on the writing surface of the blackboard sheet 101 by the recording head 116, and while the blackboard sheet 101 is being transported, toner from the developing device 122 adheres to the charged portion. A visible image (toner image) is displayed.

Note that a cleaning blade 118 is installed on the back side of the device.
Toner, ink written with a felt-tip pen, etc. are wiped off by the AC static eliminator 117, and static electricity is removed by the AC static eliminator 117.

[Problem to be solved by the invention]

In this type of conventional electronic blackboard, it was not possible to store the drawing information of the blackboard sheet 101 read by the CCD line sensor 120 or the document information read by the image scanner 102.

Therefore, when displaying the same drawing information on the blackboard sheet 101 or when making a hard copy on recording paper using the printer 106, there is a problem in that original input must be performed each time. In addition, in this type of conventional electronic blackboard, for example, in a meeting lasting several days, additions and corrections are made to the drawings on the blackboard sheet 101, and the drawings with these additions and corrections are temporarily saved and used for the next meeting. When the drawing with these additions and corrections is used by drawing it on the blackboard sheet 101, there is a problem in that the drawing quality deteriorates significantly. In other words, conventionally, in this case, the drawing of the blackboard sheet 101 with additions and corrections is recorded on the CC.
It is read by the D line sensor 120 and sent to the printer 10.
6, make a hard copy on the recording paper 107 and save it temporarily.

Then, this hard-copied recording paper 107 is transferred to the document 10.
5 is read by the image scanner 102 and drawn on the blackboard sheet 101. Therefore, the information drawn on the blackboard sheet 101 is transmitted through three devices: a CCD line sensor 120 that reads the previous drawing on the blackboard sheet 101, a printer 106 that makes a hard copy onto recording paper, and an image scanner 102 that inputs the hard copy. There will be two inputs and outputs. When such input/output processing is repeated, image quality deterioration accumulates.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electronic blackboard with a display function that allows easy drawing input when displaying the same drawing information on a blackboard sheet or hard copying it onto recording paper.

Another object of the present invention is to provide an electronic blackboard with a display function that allows repeated additions and corrections to drawings on a blackboard sheet without deteriorating image quality.

[Means to solve the problem]

This invention includes a manuscript information input means 2 for inputting manuscript information, a blackboard sheet information input means 24 for inputting drawing information of the blackboard sheet 1, and an image storage means 4 for storing input image information.
3, recording paper drawing means 3 for drawing on the recording paper, and blackboard sheet drawing means 32, 33, 3 for drawing on the blackboard sheet 1.
4A, transfer means 32, 33, 36, 37, and 34B for transferring the drawing on the blackboard sheet 1 to transfer paper, selection control of input image information, control of image storage means 43, and selection control of output image information. The image information from the manuscript information input means 2 and/or the blackboard sheet information input means 24 is stored in the image storage means 43 as necessary, and the image information from the manuscript information input means 2 or the blackboard sheet information input means At least one of the image information from 24 or the image information stored in the image storage means 43 is selected, and the selected image information is transferred to the recording paper drawing means 3, the blackboard sheet drawing means 32, 33,
34A1 is an electronic blackboard in which at least one of transfer means 32, 33, 36, 37, and 34B is selectively provided with an image.

[Effect]

By operating the operation keys provided on the operation panel 7,
The image information from the image scanner 2 that inputs the original information and/or the image information from the CCD line sensor 24 that inputs the drawing information of the blackboard sheet 1 is stored in a desired frame memory of the memory 43 as necessary. be able to. Further, among the document information from the image scanner 2, the drawing information of the blackboard sheet l from the CCD line sensor 24, and the drawing information stored in the memory 43, the desired frame memory is transferred to the printer 3 and/or the recording head. 32 and the transfer means 39 can be selectively activated.

〔Example〕

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

The electronic blackboard to which this invention is applied has a function of hard copying characters drawn with a felt-tip pen or the like on a blackboard sheet onto, for example, A4 size recording paper, and a function of reading manuscript information and printing this manuscript information on the blackboard sheet. It has the function of writing and displaying on the blackboard sheet, and also has the function of transferring and recording the drawings on the blackboard sheet onto a large plain paper, for example, an Al plate, of the same size as the blackboard sheet.

FIG. 1 shows the internal structure of an electronic whiteboard to which the present invention is applied, and FIGS. 2A and 2B show the external structure of the electronic whiteboard to which the present invention is applied.

In FIG. 1, 1 is a blackboard sheet, 2 is an image scanner, and 3 is a printer.

As shown in FIG. 3, the blackboard sheet I is made by laminating white conductive polyurethane with an adhesive on a base IA made of polyethylene terephthalate (PET) to form a conductive layer IB. A dielectric layer IC is formed by similarly laminating transparent polyvinylidene fluoride (PVDF) on the IB. An adhesive layer IE is provided between each layer. In this case, the surface of this dielectric layer IC becomes the writing surface W. Note that, as shown in FIG. 4, a hard coat layer IF may be provided on the dielectric layer IC. Providing such a hard coat layer IF increases durability and improves erasability of the felt pen. In conventional electrostatic recording, the surface of the dielectric layer IC is required to have a roughness of 58 or more (surface roughness of 5 μm), but it is possible to make the surface of the dielectric layer IC smoother (for example, around Is). It has been confirmed through experiments that good recording can also be performed.

The entire electronic blackboard is covered with a cover 4, as shown in FIG. A window portion 4A is provided in the cover 4, and a portion of the blackboard sheet 1 is exposed through the window portion 4A. This cover 4
The portion exposed from the window portion 4A is the display area DP. Characters can be handwritten on the blackboard sheet 1 on the display area DP with a felt-tip pen or the like. The handwritten drawings can be erased with the eraser 5, and additions and corrections can be made easily. Further, the read drawing can be displayed on the blackboard sheet 1 on the display area DP. This drawing can be erased with the eraser 5 in the same way as a drawing drawn by hand with a felt-tip pen or the like.

The image scanner 2 is for inputting document information. As shown in FIG. 2, the image scanner 2 is removably mounted in a recess 6 on the upper surface of the front extension near the lower edge of the window 4A. FIG. 2A shows the state when the image scanner 2 is attached, and FIG. 2B shows the state when the image scanner 2 is removed. In this way, since the image scanner 2 is detachable, it is possible to input document information located away from the electronic blackboard, and it is also possible to input book documents.

In addition, it has good operability when used stand-alone. Note that an operating panel 7 is provided on the upper surface of this forward extending portion, and a storage tray 9 for storing the eraser 5 and felt ben 8 is also provided.

The printer 3 is for producing a hard copy of the drawing. As the printer 3, for example, an LED printer is used. As shown in FIG. 2, this printer 3 is built into the main body of the electronic whiteboard. Recording paper from the printer 3 is discharged from the discharge port 10. Note that a leg portion 12 to which casters 11 are attached is fixed to the lower end of the cover 4, so that the second electronic blackboard can be moved freely.

As shown in FIG. 1, the blackboard sheet 1 is moved by a feed motor 21
and drive rollers 22 so as to be endlessly transportable. On the back side of the electronic blackboard, this blackboard sheet 1
A CCD line sensor 24 equipped with a reduction lens system 23 and a reflection mirror 25 are disposed opposite to each other. Drawing information on the blackboard sheet 1 can be input using the CCD line sensor 24 and the reflecting mirror 25, which are equipped with the lens system 23. That is, the blackboard sheet 1 is transported in the direction of the arrow by the feed motor 21 and drive roller 22. During this transfer, drawing information on the blackboard sheet 1 is read by the CCD line sensor 24.

Also, on the back side of the electronic blackboard, facing blackboard sheet 1,
Cleaning blades 26A and 26B, a cleaning brush 27, and a static eliminating roller 28 are disposed.These cleaning blades 26A and 26B and the cleaning brush 27 remove the dust on the blackboard sheet 1 while the blackboard sheet 1 is being transported. Drawings made with felt-tip pens or toner are wiped away. Then, by the static eliminating roller 28,
The electrical charge on the blackboard sheet 1 is removed.

Also, on the back side of the electronic blackboard, facing blackboard sheet 1,
An electrostatic recording head 32 consisting of a write electrode or stylus electrode 3o and a control electrode 31 is provided. Furthermore, a developing device 33 for supplying toner is provided. A fixing flash lamp 34A for semi-fixing the toner on the blackboard sheet 1 is disposed in front of the electronic blackboard.

A drawing can be recorded on the blackboard sheet 1 using the electrostatic recording head 32, the developing device 33, and the fixing flash lamp 34A.

In other words, the electrostatic recording head 32 includes a printer drive circuit 4.
A recording signal is supplied from 8. Based on this recording signal, the blackboard sheet 1 is charged, and an electrostatic latent image screen is recorded on the writing surface of the blackboard sheet 1. While the blackboard sheet 1 is being transported, toner from the developing device 33 is attached to the charged portion. As a result, a visible image (toner image) appears on the blackboard sheet 1. This toner image is semi-fixed on the blackboard sheet l by the fixing flash lamp 34A.

Note that the semi-fixed state is a fixed state in which the toner cannot be wiped away by touching it with hands or clothes, but can be wiped off by using an eraser.

Below the electronic blackboard, there is a winding frame 35 that holds the roll paper P, a transfer roller 36 that presses the paper P fed from the first frame 22 side onto the developing section surface of the blackboard sheet 1, and a press section for the paper P. A transfer corotron 37, a fixing flash lamp 34B, and a paper cutter 38 corresponding to the
and will be provided. A transfer mechanism 39 is constituted by the transfer roller 36, the transfer corotron 37, and the fixing flash lamp 34B.

That is, during transfer, the paper P and blackboard sheet 1 are brought into pressure contact by the transfer roller 36, high pressure is applied to the transfer corotron 37, and the fixing flash lamp 34B is turned on. The blackboard sheet 1 with toner attached to the charged portion is pressed against the paper P by the transfer roller 36, and the toner image is transferred from the blackboard sheet 1 side to the paper P side by the transfer corotron 37. be exposed. After the toner image is transferred, the toner image is completely fixed on the paper P by absorption of radiant heat generated by the light emitted from the fixing flash lamp 34B. Note that during transfer, when an electrostatic latent image is recorded on the blackboard sheet 1, the toner image is made to be a mirror image. This is because if the toner image is not made into a mirror image, the image after transfer will be reversed. This paper P has outlet 1
3 (FIG. 2) and cut at a predetermined position by a paper cutter 38.

In one embodiment of the present invention, as shown in FIG. 1, a system controller 41, an input control circuit 42, and a memory 4
3 and an output control circuit 44 are provided. memory 4
3 includes an image scanner 2 or a CCD line sensor 2.
The image information from 4 can be stored as needed. Further, the input/output relationship is controlled by an input control circuit 42 and an output control circuit 44. These controls are
By operating the operation switch 45 on the operation panel 7,
This is performed by the system controller 41.

In other words, the output of the image scanner 2 is
is supplied to and binarized. The output of this binarization circuit 46 is supplied to the input control circuit 42.

The output of the CCD line sensor 24 is supplied to a binarization circuit 47 and binarized. The output of the binarization circuit 47 is supplied to the input control circuit 42.

The input control circuit 42 is supplied with an input control signal from the system controller 41 . Based on this input control signal, the output of the binarization circuit 46 and/or the output of the binarization circuit 47 is supplied to the memory 43 and/or the output control circuit 44.

A memory control signal is applied to the memory 43 from the system controller 41 . The memory 43 includes, for example, ten frame memories 43I to 43Io. Frame memory 43 . 43,o, the necessary memory is specified, and its writing/reading is controlled. Note that by reversing the order of the write address and read address of the memory, it is possible to output image information that is a mirror image.

The output of memory 43 is supplied to output control circuit 44 . The output control circuit 44 is supplied with an output control signal from the system controller 41 . Based on this output control signal, the output of the output control circuit 44 is controlled.

The output of the output control circuit 44 is controlled by the printer drive circuit 4 days and/or
Alternatively, it is supplied to the printer drive circuit 49.

The output of the printer drive circuit 48 is supplied to the electrostatic recording head 32. The output of the printer drive circuit 49 is supplied to the printer 3.

On the operation panel 7, as shown in FIG. 5, there are input selection keys 51A and 51B for making operation settings, memory selection keys 52, 52..., output selection keys 53A, 53B,
53C and an execution key 54 are provided. In addition, a scroll key 55 for scrolling blackboard sheet 1 is also provided.
, a stop key 56 for stopping scrolling
will be placed. Additionally, a numeric keypad 58 is provided for setting the number of sheets and the like. A display device 59 is also provided.

When the input selection key 51A is pressed, the binarization circuit 46
The input control circuit 42 is set to output the image signal from the image scanner 2 which has been binarized. When the input selection key 51B is pressed, the image signal from the CCD line sensor 24, which has been binarized by the binarization circuit 47, is set to be output from the input control circuit 42.

Depending on the setting status of the memory selection keys 52, 52...
Frame memory 43 of memory 43. ~43,.

A desired one is specified, and a state is set for reading/writing it.

When the output selection key 53A is pressed, the blackboard sheet planning state is set. That is, when the output selection key 53A is pressed, the image signal output from the output control m44 is applied to the electrostatic recording head 32 via the printer drive circuit 1.848 yen. The mechanism control circuit 50 controls the blackboard sheet 1.
The state is set such that a mechanism is operated to attach toner thereon, develop it with the developing device 33, and semi-fix it with the fixing flash lamp 34A.

When the output selection key 53B is pressed, the A4 size hard copy output mode is set. In other words, output selection key 5
When 3B is pressed, the image signal output from the output control 44 is set to be applied to the printer 3 via the printer drive circuit 49. The printer 3 forms a hard copy based on this image signal.

When the output selection key 53C is pressed, the state is set to an Al plate transfer hard copy output state. That is, when the output selection key 53C is pressed, the image signal output from the output control 44 is applied to the electrostatic recording head 32 via the printer drive circuit 48. The mechanism control circuit 50 sets a mechanism for applying toner onto the blackboard sheet 1 and using the developing device 33 to do so, and also presses the paper P onto the blackboard sheet 1 using the pressure roller 36. Transcription Trocolon 3
A high voltage is applied to 7, and the transfer mechanism 39 is set to operate.

Input selection keys 51A and 5 forming operation selection keys
1B1 memory selection keys 52, 52..., output selection keys 53A, 53B, 53C are self-illuminated switches with built-in LEDs, and each time the input selection keys 51A and 51B and the output selection keys 53A and 53B are pressed, For example, the light is turned on in three stages: no light, green light, and red light. Each time the memory selection keys 52, 52... are pressed, for example, a blank light,
It is smoked in four stages: green light, red light, and yellow light. You can check the setting status from these statuses. Basically, selected items are lit in green or red, and unselected items are not lit. The selected route can be determined by the keys lit in the same color. Although it is possible to set a plurality of routes at the same time, it is not possible to press the output selection keys 53A and 53C at the same time to select the blackboard drawing output state and the Al plate transfer hard copy output state at the same time. This is because the same recording head 32 is used for blackboard drawing and Al plate transfer hard copy. Further, the memory selection keys 52, 52, . . . are lit in yellow when a drawing is saved, and remain unlit when a drawing is not saved. Then, the key 52 corresponding to the selected frame memory lights up in green or red.

The execution key 54 is a self-illuminated switch with a built-in LED, and is illuminated in two stages, for example, no light and green light. The execution key 54 is illuminated in green while the operation is being executed, and becomes unlit when the operation is completed.

As shown in the flowchart in FIG.
Select input using 1A and 51B, and press memory selection key 5.
2, 52, . . . , output selection keys 53A, 53B, 53C, and pressing the execution key 54, the operation in the set state is executed.

For example, if one wants to obtain an A4 size hard copy of the drawing written on blackboard sheet 1, the user presses the input selection key 51B and the output selection key 53B, as shown in FIG. At this time, the input selection key 51B and the output selection key 53B are
It lights up in the same color (green). In this state, the execution key 54 is pressed. Then, the output of the CCD line sensor 24 is sent to the printer 3 via the binarization circuit 47, the input control circuit 42, the output control circuit 44, and the printer drive circuit 49.
A hard copy of the drawing is obtained from the printer 3.

At the same time as obtaining an A4 hard copy of the drawing written on blackboard sheet 1, the image scanner 2 reads the manuscript,
If it is desired to display this drawing on the blackboard sheet 1 while storing this manuscript information in the frame memory 432, the operation is performed as shown in FIG. That is, the input selection key 51B
and press the output selection key 53B. Then, the input selection key 51B and the output selection key 53B light up in the same color (green). Then, the user presses the input selection key 51A, presses one of the memory selection keys 52 marked "2", and presses the output selection key 53A. Then, the input selection key 51A, the memory selection key 52 with the number "2" displayed, and the output selection key 53A light up in the same color (red).

In this state, the original is placed on the image scanner 2, and the execution key 54 is pressed. Then, the COD line? The output of the sensor 24 is sent to the printer 3 via a binarization circuit 47, an input control circuit 42, an output control circuit 44, and a printer drive circuit 49, and a hard copy of the drawing on the blackboard I is obtained from the printer 3. At the same time, the document information read by the image scanner 2 is supplied to the frame memory 43■ via the binarization circuit 46 and the input control circuit 42, and is also supplied to the recording head via the output control circuit 44 and the printer drive circuit 48. 32.

As a result, a hard copy of the drawing on the blackboard sheet 1 is obtained from the printer 3, and the document information read by the image scanner 2 is stored in the frame memory 43g, and this document information is drawn on the blackboard sheet 1. Ru.

Note that the input control circuit and the output control circuit can be realized using one CPU together with the system controller.

〔Effect of the invention〕

According to this invention, the input operation selectively inputs document information from the image scanner 2 that inputs document information and/or image information from the CCD line sensor 24 that inputs drawing information of the blackboard sheet 1. be able to. Furthermore, since the memory 43 is provided, this drawing information can be stored in a desired frame memory of the memory 43 as needed. Then, by the output operation, image information from the image scanner 2, image information from the CCD line sensor 24, and image information stored in a desired frame memory of the memory 43 are selectively sent to the printer 3 and/or the recording head 32. and the transfer mechanism 39
can be activated selectively.

Therefore, the following effects occur.

When displaying the same manuscript information multiple times on a blackboard sheet, there is no need to input the manuscript each time.

Multiple hard copies can be made from a single blackboard sheet drawing. Furthermore, a plurality of transfer hard copies can be obtained from one drawing on a blackboard sheet.

Even if the drawings on the blackboard are repeatedly added to and corrected, the image quality does not deteriorate.

Further, according to the present invention, the operation selection key is a self-illuminated switch with a built-in LED, and the selected route is illuminated in the same color. Therefore, it is possible to recognize at a glance where image information is output from which input.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the internal structure of an embodiment of the present invention, FIGS. 2A and 2B are perspective views showing the external structure of an embodiment of the invention, and FIG. 3 is a block diagram showing the external structure of an embodiment of the invention. FIG. 4 is a cross-sectional view of another example of the structure of the blackboard sheet, FIG. 5 is a plan view showing the structure of the operation panel in one embodiment of the present invention, and FIG. Flowcharts used to explain one embodiment FIGS. 7 and 8 are plan views used to explain the use of one embodiment of the present invention, FIG. 9 is a perspective view showing the external configuration of an example of a conventional electronic blackboard, and FIG. The figure is a perspective view showing the internal configuration of an example of a conventional electronic whiteboard. Explanation of main symbols in the drawings 1: blackboard sheet, 2: image scanner, 3: printer, 41: system controller. 43: Memory.

Claims (2)

[Claims] (1) A manuscript information input means for inputting manuscript information, a blackboard sheet information input means for inputting drawing information on a blackboard sheet, an image storage means for storing input image information, and a recording paper drawing means for drawing on recording paper. A blackboard sheet drawing means for drawing on the blackboard sheet; A transfer means for transferring the drawing on the blackboard sheet to a transfer paper; Selection control of input image information, control of the image storage means, and selection control of output image information. control means for storing image information from the manuscript information input means and/or blackboard sheet information input means in the image storage means as necessary; or the image information stored in the image storage means, and transfer the selected image information to at least one of the recording paper drawing means, the blackboard sheet drawing means, and the transfer means. An electronic blackboard that selectively gives information to one person. (2) The electronic blackboard according to claim 1, further comprising display means for indicating the selected route.