JPH0361979A - Electronic blackboard - Google Patents

Abstract

PURPOSE:To transfer an unmagnified image displayed on a blackboard display member on large plain paper by providing a mechanism which switches and displays an erecting image and a mirror image on the blackboard display member and mechanism which transfers the image on the plain paper at the time the mirror image is displayed. CONSTITUTION:An electrostatic recording medium 1 as the blackboard display member is disposed so as to be transmitted endlessly through a feeding mortor 2 and a driving roller 3. An electrostatic recording head 6, a cleaning member 8 and a developing device 12 are provided while facing to the electrostatic recording medium 1. The blackboard display member 1 is provided with the mechanism which switches and displays the electing image and the mirror image on the blackboard display member 1 and the mechanism which transfers the image at the time the mirror image is displayed. Thus, an original information is displayed on the blackboard display member as the electing image as the original blackboard display and the electing image can be switched to the mirror image to be displayed. And at the time the mirror image is displayed, the image is transferred on the plain paper by corotron, etc., to be used as an enlarged copy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention forms an electrostatic latent image on an electrostatically recordable blackboard 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]

In the present invention, after forming an electrostatic latent image based on document information on an electrostatically recordable blackboard display member using an electrostatic recording head,
This is an electronic blackboard that converts the image into a visible image using toner and displays it on the blackboard display member, and has the function of being able to switch between displaying a normal image and mirror image on the blackboard display member, and the function of transferring the image to plain paper when displaying the mirror image. By providing this, the image displayed on the blackboard display member can be transferred to large-sized plain paper at the same size.

[Conventional technology]

Conventionally, the present 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 display it by writing on the blackboard sheet ( Special application 1986-1
No. 57176).

In this electronic blackboard with a display function, as shown in FIG.
2) and drive rollers (3) so as to be endlessly transportable. This electrostatic recording medium (1) has a first
As shown in Figure 2, a base (1a) made of vinyl chloride
A conductive layer (1b) is formed by vapor-depositing aluminum or the like on the conductive layer (1b), and a dielectric layer (IC) made of polyvinylidene fluoride (PVDF) made white by containing titanium oxide is formed on this conductive layer (1b). It becomes. In this case, this dielectric layer (1
The surface of C) becomes the writing surface W.

A recording head (6) consisting of a write electrode, that is, a stylus electrode part (4) and a control electrode part (5), faces the electrostatic recording medium (1) arranged endlessly, and an AC static eliminator ( 7), cleaning blade (8), and lens system (
A CCD line sensor 10) having a CCD line sensor 9) and a reflecting mirror (11) are provided, and a developing device (2) for supplying toner is also provided.

The exterior of this electronic blackboard is entirely covered with a cover (not shown), and the electrostatic recording medium (1) exposed through the window at the front of this cover functions as a writing board. There is also a document insertion slot (14a) at the bottom front of this cover.
, an ejection port (14b), and an ejection port (15) for printing out written contents.

Furthermore, legs to which casters are attached are fixed to the lower end of the cover, allowing the electronic blackboard to be moved freely.

When this electronic blackboard is normally used, writing is performed on the writing surface W of the electrostatic recording medium (1) using, for example, a felt-tip pen. When copying, the electrostatic recording medium (1) is transferred, and the information written on the electrostatic recording medium (1) is transferred to the reflecting mirror (11) on the back side of the device.
, CCD line sensor (■0) via lens system (9)
Read with. Then, it is copied onto a designated recording paper using the xerography method, etc., and the output port (15)
taken from. Next, when inserting the original into the insertion slot (14a) and displaying the image using electrostatic recording, use the recording head (6
) records an electrostatic latent image on the writing surface W on the surface of the electrostatic recording medium (1), and while the electrostatic recording medium (1) is being transported, toner from the developing device (12>) adheres to the charged portion. A visible image (toner image) is displayed.The cleaning plate (8) on the back side of the device wipes away toner, ink, etc. written with a felt-tip pen, and then the AC static eliminator (
7), the charge is removed.

[Problem to be solved by the invention]

Conventional electronic blackboards configured in this way have a hard copy function that reads information written on an electrostatic recording medium (1) as a blackboard sheet using an optical system and copies it onto a small recording paper, and a hard copy function that copies the information written on the electrostatic recording medium (1) as a blackboard sheet. It was not possible to store information manuscripts as large hard copies only by having two functions: a blackboard display function for displaying on the electrostatic recording medium (1).

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide an electronic blackboard that enables large-sized hard copies of information manuscripts and also enables full-size hard copies of the blackboard display surface.

[Means to solve the problem]

In order to achieve the above object, the electronic whiteboard according to the present invention has the following features:
A blackboard display member having a chargeable dielectric layer disposed so as to be endlessly transportable, a recording head disposed opposite to the blackboard display member, a cleaning member, and a developing device for supplying toner. In an electronic blackboard, the blackboard display member is provided with a function to switch between displaying a normal image and a mirror image, and a function to transfer the mirror image to plain paper when displayed.

[Effect]

According to the present invention, the original information can be displayed as a normal image on the blackboard display member, resulting in the original blackboard display, and can also be switched to a mirror image, and when this mirror image is displayed, it can be transferred onto plain paper using a corotron or the like and enlarged. It can be used as a copy.

Furthermore, it is also possible to make a hard copy at the same size after writing and correcting the image displayed as a normal image on the blackboard display member using a marker or the like.

[Example] Hereinafter, an example of the electronic blackboard of the present invention will be described with reference to FIGS. 1 to 10.

First, one embodiment will be described with reference to the overall schematic configuration diagram shown in FIG. 1. Members corresponding to the conventional example shown in FIG. do.

In FIG. 1, an electrostatic recording medium (
1) is arranged to be endlessly transportable via a feed motor (2) and a drive roller (3). Then, facing this electrostatic recording medium (1), there is an electrostatic recording head (6) formed from a write electrode, that is, a stylus electrode part (4), and a control electrode B (5), and an electrostatic discharge head (6) as an AC static eliminator. Laura (7)
and cleaning blade (8a,), (8a,)
and a cleaning roller brush (8b); and a CCD comprising a lens system (9).
A line sensor (10) and a reflecting mirror (11) are provided, and a developing device (12) for supplying toner is also provided.

On the front side of this developing device (12), there is an electrostatic recording medium (1).
A fixing flash lamp (16) is provided as a heat generating means extending in the width direction with the width direction dimension of The pressure roller (17) is connected to the cleaning blade (8).
a, ), (8a2) have guide rollers (18a,
).

(18a,) are arranged facing each other with the electrostatic recording medium (1) in between, and guide rollers (19) and (20) are in rolling contact with required parts of the electrostatic recording medium (1). .

Also in the electronic whiteboard of this example configured in this manner, a toner image of document information is displayed on the display surface of the electrostatic recording medium (1), as in the conventional example described above.

In this example, the electronic blackboard configured as described above is equipped with a transfer mechanism (21) using a transfer corotron or the like to transfer the image developed on the electrostatic recording medium (1) onto plain paper. This makes it possible to carry out the process and save it as a hard copy.

This transfer mechanism (21>) includes a winding frame (22) that holds the roll paper P, and a developing device (12) that transfers the paper P sent out from the winding frame (22) # to the developed portion of the electrostatic recording medium (1). Pressure roller (23a) to press the front part of
.

(23b), a transfer corotron (24) corresponding to the pressure bonding part of paper P, and a fixing flash lamp (25).
), paper feed member (26), and paper cutter (
27).

The transfer function (21) configured in this way is connected to the winding frame (22).
The roll paper P held by the roller and fed by the feeding member <26> is pressed against the developed surface of the electrostatic recording medium (1) on the blackboard by pressure rollers (23a) and (23b), and is electrostatically transferred by the transfer corotron (24). The toner image is transferred from the electrorecording medium (1) side.

After the toner image is transferred, the toner image is completely fixed on the paper P by the heat generated by the flash lamp for fixing (25). In this state, the paper P is sent by the feeding member (26) and is held at a predetermined position. A large-sized, for example, A1-sized hard copy, in which the image cut by the paper cutter (27) and developed on the electrostatic recording medium (1) is transferred at the same size, is obtained.

Next, a second embodiment of the transfer mechanism (21) will be described with reference to FIG.
The transcription corotron (24tl) is between (23tl) and (23tl).
), a peeling corotron (28) is disposed in the direction in which the paper P is transported.

In this example configured in this way, the paper P is pressed against the developing surface of the electrostatic recording medium (1) and the transfer corotron (
24>, the toner image is transferred.

At this time, when the distance between the wire of the transfer corotron (24) and the developed surface of the electrostatic recording medium (1) is 10 mm, the best transfer is performed when +4 KV is applied to the transfer corotron (24).

After this transfer, paper P and electrostatic recording medium (1)
In order to weaken the adhesion, an AC voltage of 4 to 5 KV is applied to the peeling corotron (28), and finally the toner transferred to the paper P is completely fixed by the heat generated by the fixing flash lamp (25).

Even after the toner image has been transferred to the paper P in this way, toner remains on the electrostatic recording medium (1), so it is scraped off by the cleaning blade (29) before it is exposed on the display surface. It is done like this.

FIG. 3 shows yet another embodiment of the transfer mechanism, in which the toner image is transferred without using a corotron, and the roll paper P is transferred to the electrostatic recording medium (1). The pressure roller (23) is configured to apply a positive bias voltage to the pressure roller (23).
In step 3), the toner image can be transferred while the paper P is pressed against the electrostatic recording medium (1), and the structure is simplified compared to the embodiment described above.

In the above configuration, the pressure rollers (23a), (23b
) and 23) are arranged so as to be able to approach and separate from the electrostatic recording medium (1), and when not transferring to paper P, the pressure rollers (23a), (23b) and (23) are used for electrostatic recording. The pressure of the paper P is released by separating it from the medium (1), so that a display can be displayed on the display surface of the electrostatic recording medium (1), which is the original function of a blackboard.

As mentioned above, in order to transfer the electrostatic latent image to the paper P, when recording the electrostatic latent image on the electrostatic recording medium (1), the electrostatic latent image is either horizontally reversed or vertically reversed on the development surface. The toner image is configured to record and develop a mirror image of the toner image.

An example of the control circuit of the electronic blackboard constructed as described above will be explained with reference to FIG. 4. In the figure, (31> is an image league that reads the original, and supplies the original information as a read image signal to the frame memo!J- (33) through the binarization circuit (32>).Then, this frame memory (33) memory control circuit (3) based on the normal display command by operation of the system controller (34).
This frame memo is activated by 5>! J-(33)
The document information stored in the recording head drive circuit (34) is supplied to the recording head drive circuit (34).

This recording head drive circuit (34) is a recording head drive circuit (34).
It is connected to each stylus electrode and each control electrode of this recording head (6) in order to drive the frame memo!
Drive signals are supplied to each electrode of the recording head (6) based on document information supplied from J- (33). At the same time as this operation, the control circuit (37) of the blackboard mechanism is also operated, and each mechanism of the blackboard except the transfer mechanism (21) is driven. Through this operation, an electrostatic latent image is recorded on the electrostatic recording medium, which functions as an electronic blackboard on which a toner image is displayed as described above.

In addition, as mentioned above, in order to transfer to paper P, operate the system controller (34) to switch to transfer display, and then the frame memo 'J- (33) will be memorized by the signal from the memory control circuit (35). The document information is inverted and read out and supplied to the recording head drive circuit (36).

Then, the recording head (6) forms an electrostatic latent image on the electrostatic recording medium, which is an inverted version of the original image, by the drive signal supplied from the recording head drive circuit (36), and in this state, the paper P is printed. By bringing them into pressure contact and performing the transfer operation as described above, a normal toner image is transferred to the paper P at the same size as the image displayed on the electrostatic recording medium.

The image reversal method in this transfer operation is shown in Figures 5 and 7.
This will be explained with reference to the flowchart shown in the figure.

First, as an example of a method of horizontally reversing the image so that it becomes a mirror image, as shown in FIG. Assuming that there are 1600 bits, and bits 0 to 1599, information image A is output as shown in Fig. 6 by replacing bit 00 bit 1599 bit 14-+ bit 1598 bit 7990 bit 800 and outputting this. A mirror image A is formed on the electrostatic recording medium (1) as a left-right inverted mirror image, and by transferring this onto paper P, a transferred image A as a normal image is obtained.

On the other hand, as a method of vertically inverting the image, as shown in FIG. 7, the information image data is sequentially output from the lowest line to the highest line, so that the information image B is turned upside down as shown in FIG. is formed on the electrostatic recording medium (1) as an upside-down mirror image, and by transferring this onto paper P, a transferred image B as a normal image is obtained.

Note that when making a hard copy of the image developed on the blackboard display surface, that is, the display surface of the electrostatic recording medium (1), the electrostatic recording medium (1) is transported in the same manner as in the conventional example described above. The image is read by the CCD line sensor (10) on the back side, and this image is again written as an electric signal on the copy paper by the head.

FIG. 9 shows a specific configuration of main parts in the first embodiment shown in FIG. 1, and members corresponding to those shown in FIG. 1 are given the same reference numerals and their explanations are omitted. The transfer mechanism will be explained in detail.

Pressure roller (23a) of the transfer mechanism (21>) in this example
.

(23b) are pivoted parallel to each other at required intervals on a support frame (41), and this support frame (41) is attached to a base (42) installed below the front side of the blackboard so as to be movable towards and away from the blackboard. It is being That is, this support frame (41
) is a pair of plungers (43) arranged on the base (42)
.

It is connected to the movable iron cores (43a) and (44a) of (44) via interlocking pieces (45) and (46), and is moved toward and away from the blackboard by the operation of plungers (43) and (44). It is done like this.

This movement of the support frame (41) is controlled by the interlocking piece (45) so that the pressure roller (23b) located on the feeding side of the paper P is pressed against the paper P before the pressure roller (23a) located on the feeding side. 46〉 is pivotally supported at its intermediate portion by a pivot pin (47) on the base (42〉) in a cross-like manner, and the support frame (41
) side, the interlocking piece (46) on the side corresponding to the pressure roller (23b) on the feeding side is made longer.

In addition, the transfer corotron (24) is connected to a pressure roller (23a).
The support frame (4) is located between and (23b).
1> is installed.

A fixing flash lamp (25), a feeding member (26), and a paper cutter (27) are sequentially arranged in the feeding direction from the feeding side pressure bonding roller (23a).

A xenon flash lamp can be used as the fixing flash lamp (25), and this lamp house (
A reflector plate (49) is attached within the spacer 48 to efficiently reflect light as a heat source and radiate the required heat.

The feeding member (26> is a bell) (5) by the motor (50).
1) and a pinch roller (53) that is pressed against the feed roller (52) by the elasticity of a spring.
The paper P is conveyed by being pinched by a drive roller (52) and a pinch roller (53). A paper cutter (27) disposed adjacent to the feeding member (26) is configured to automatically operate to cut the paper P after the paper P has been fed a predetermined length.

Further, in the transfer mechanism (21) placed at the bottom of the tank, a cleaning blade (54) is arranged behind (downward in the figure) the flash lamp (16) for fixing the blackboard electrostatic recording medium (1). , this cleaning blade (
A receiver 54> is attached to the edge of the box (55>), and an elastic receiver piece (56) is attached to the edge facing the cleaning blade (54).

The base end of the box (55) is connected to the movable iron core (57a) of the third plunger (57), and the middle part is pivotally supported on the base (42) side by the shaft pin (58). The arm (59) is attached to the tip of the shaft pin (59) by the action of the plunger (57).
), the cleaning blade (54) and receiver piece (56) are rotated around the electrostatic recording medium (
1) so as to be brought into contact with and separated from the surface.

In addition, the reel (22) of the paper P is mounted on a bracket bearing (6).
The bracket bearing (60) is supported by the bracket bearing (60), and a holding piece (6) which elastically presses against the shaft (22a) of the winding frame (22) is attached.

In addition, in the case of a blackboard, the motor (2) for transporting and driving the electrostatic recording medium (1) is a stepping motor and is connected to a drive roller (3) and a belt (62). Supply box (6
3) are installed in succession.

In the figure, (64) is a scanner for reading manuscripts;
5> is a cooling blower.

In the electronic blackboard of this example, which is placed at the bottom of the tank in this manner, when the transfer mechanism (21) is not in operation, the pressure rollers (23a) and (23b) are pressed into place as shown in FIG. (
43) With the off operation of (44), the movable iron core (43a), (
44a) is projected and connected to the interlocking piece (45)
, (46) is in a state where one interlocking piece (45) is rotated counterclockwise and the other interlocking piece (46> is rotated clockwise about the pivot supported by the shaft pin (47). By moving the support frame (41) in a direction away from the electrostatic recording medium [1], the electrostatic recording medium (1)
more isolated.

The cleaning blade (54) and the receiver are pieces (5).
6), when the third plunger (57) is turned off, the movable iron core (57a) is protruded, and the arm (57a) connected to it is
59> is rotated counterclockwise around the pivot supported by the pivot pin (58), so that the receiver is moved in a direction away from the electrostatic recording medium (1) via the box (55). be.

When the transfer mechanism (21) is inactive, the electrostatic recording medium (
Toner from the developer (12) adheres to the electrostatic latent image recorded by the recording head (6) on the writing surface of the electrostatic recording medium (1), and a visible image is displayed as a normal image. 1
) during the transfer of the fixing flash lamp (16).
The toner image is semi-fixed by the heat generated by the light emission, and the toner image is displayed without being scattered by wind or the like.

In addition, when transferring the toner image displayed on the electrostatic recording medium (1) to plain paper, the transfer mechanism <21> is operated and the paper P is pressed onto the electrostatic recording medium (1) by the pressure roller (23a).
) and (23b). That is, the transfer mechanism (
When 21〉 is operated, the plungers (43) and (44)
The movable iron cores (43a) and (44a) are retracted by the ON operation of , and one of the interlocking pieces (45) is thereby rotated clockwise and the other interlocking piece (46>) is rotated counterclockwise. The support frame (41) is moved in the direction of the electrostatic recording medium (1), and the movement of the support frame (41> causes the pressure rollers (23a) and (23b) to press against the paper P, thereby transferring the conohape P to the electrostatic recording medium. (1).

The paper P of these pressure rollers (23a) and (23b)
As mentioned above, the pressure roller (23b) on the feed side of the paper P presses the paper P first, and then the pressure roller (23a) on the feed side presses it. ) is pressed against the electrostatic recording medium (1) under tension without loosening.

Further, when the third plunger (57) turns on, the movable iron core (57a) is pulled in, thereby causing the arm (59
> is rotated clockwise and the cleaning blade (54
> and the receiver piece (56) are moved through the receiver box (55) and their respective tips are brought into contact with the electrostatic recording medium (1).

On the other hand, as described above, an electrostatic latent image is recorded on the electrostatic recording medium (1) by the recording head (6) in response to the transfer switching signal, and the electrostatic latent image is inverted horizontally or vertically. The visible image is displayed as a mirror image due to toner adhering to the electrostatic recording medium (1), and the mirror image toner is transferred to the pressure contact portion of the paper P transferred by the feeding member (26) of the transfer mechanism (21) during the movement of the electrostatic recording medium (1). The image is transferred by the corotron (41), and then this toner image becomes a normal image by this transfer, and is fixed on the paper P by heat generated by light emission from the fixing frassine lamp (25) on the transfer mechanism (21> side).

The paper P on which the toner image has been transferred as a normal image in this way is held between the feeding member (26) of the transfer mechanism (21), that is, the feeding roller (52> driven by the motor (50) and the pinch roller (53)). After being transported and sent to a predetermined length, it is cut with a paper cutter (27) to obtain a hard copy of a predetermined size, for example, A1 size, on which the image is transferred.

Furthermore, even after the toner image is transferred to the paper P in this way, some toner that is not transferred remains on the electrostatic recording medium (1), but this residual toner is removed when the paper P is pressed against the electrostatic recording medium (1). The scraped toner is scraped off by a cleaning blade (54) that comes into contact with the rear part, and the scraped toner is received by a tray piece (56), which is housed in a box (55) and displayed on the display surface. from occurring.

Although the present invention has been described in detail above, the present invention is not limited to these embodiments, and can be modified in various ways without departing from the spirit of the present invention.

〔Effect of the invention〕

As described above, according to the present invention, by adding the transfer function of copying at the same size to the original document information display function of the electronic blackboard, it is possible to save images on large-sized plain paper, for example. Creation of large posters using A4 manuscripts, and corrections to images once displayed on the blackboard display surface.
The scope of use of electronic blackboards is significantly expanded, as it becomes possible to save hard copies with notes added, and large copies can be made and distributed to a large number of people.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an example of the electronic whiteboard of the present invention, FIGS. 2 and 3 are configuration diagrams of main parts of other examples, and FIG. 4 is a configuration of an example of a control circuit applied to the electronic whiteboard of the present invention. 5 is a flowchart of an example to explain the example in FIG. 4, FIG. 6 is an explanatory diagram of image transfer as an example, and FIG. 7 is a flowchart of another example to explain the example in FIG. FIG. 8 is an explanatory diagram of another example of image transfer,
FIG. 9 is a side sectional view of a specific embodiment of the electronic blackboard of the present invention;
Figure 10 is a side view showing the operating state in Figure 9;
FIG. 1 is a block diagram of a conventional electronic whiteboard, and FIG. 12 is an enlarged sectional view of an electrostatic recording medium. In the figure, (1) is an electrostatic recording medium as a blackboard display member, (
6) is a recording head, (8) is a cleaning member, (12)
〉 is the developing device, (21〉 is the transfer mechanism, (22〉 is the winding frame, (
23a). (23b) is a pressure roller, (24) is a transfer corotron, (26) is a paper feeding member, and (27) is a paper cutter P is a roll paper. l: Electrostatic recording medium body (devil-like stone) Fig. 2 2. Compound 'It> The mouth of rest Fig. 3 Fig. 11 W Fig. 12 Fig. 5 Figure 6 Flowchart of I't' now 1 Figure 1 Hiin 1 Langsan I? 2 Transcription explanation Figure 8

Claims (1)

[Scope of Claims] A blackboard display member having a chargeable dielectric layer disposed in an endlessly transportable manner, a recording head disposed opposite to the blackboard display member, a cleaning member, and a toner supplying member. What is claimed is: 1. An electronic blackboard having a developing device, characterized in that the blackboard display member has a function of being able to switch between displaying a normal image and a mirror image, and a function of transferring the mirror image to plain paper when it is displayed.