JPH0267583A - image display device - Google Patents

Abstract

PURPOSE:To arbitrarily switch the displaying state of the title device between a both-side and one-side displays by providing opening sections and means which expose or visually block a picture recording medium from the opening sections. CONSTITUTION:A carrying means 1 moves a picture recoding medium 5 in one direction from coloring matter adhering means 2-4. The means 2-4 arbitrary select whether the 2nd displaying picture is formed in the same vertical and lateral directions as the 1st displaying picture or in the opposite vertical and lateral directions after forming the 1st displaying picture on the surface of the medium 5 when the medium 5 is moved in one direction. Picture displaying sections A and B are provided with means 14a, 14b, 15a, and 15b which expose or visually block the medium 5. Therefore, switching between a both-side and one-side displays can be performed arbitrarily, and when the one-side display is made, the picture formed in the opposite directions on an undesired displaying screen can be mace invisible from the outside by visually blocking the undesired displaying screen.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image display device, and in particular, an image display device in which a colored substance corresponding to an image to be displayed is attached to an image recording medium on a flexible belt. The present invention relates to an image display device that forms and displays an image on the image recording medium.

[Prior Art] An apparatus comprising a medium, a conveyance means for moving the image recording medium in the longitudinal direction, and a means for depositing a colored substance on the moved image recording medium in accordance with the image to be displayed. , in the image display device configured to display an image on the recording medium, the conveyance means moves the image recording medium in one direction from the colored substance adhesion means, and the colored substance adhesion means When moving in the direction, the first
The application has been filed for an image display device configured to form a second display image that is vertically and horizontally opposite to the first formed image after forming a display image.

This image display device has viewing windows on both the front and back sides, making it possible to observe from both sides.A single-sided image display device has viewing windows on both the front and back sides, or only on one side. The only difference is that the other configurations are almost the same.

[Problems to be Solved by the Invention] However, in the image display device described in the above-mentioned conventional technique, the first formed image and the second formed image cannot be oriented vertically or horizontally, or can be oriented in the same direction. If the first formed image and the second formed image are oriented vertically and horizontally in the same direction, single-sided display can be easily performed. However, there is a problem in that when the second formed image is displayed on the front side due to the movement of the conveying means, the formed image 'i41 will be displayed upside down and horizontally on the back side.

The present invention attempts to solve these problems. That is, the present invention allows switching between double-sided display and single-sided display at will, and in the case of single-sided display, by visually blocking the other display surface, the upper and lower sides are placed on a surface that is not the desired display surface. It is an object of the present invention to provide an image display device that can prevent a formed image displayed in a reverse direction from being observed from the outside. [Means for Solving the Problem] In order to achieve the above object, The present invention provides a belt-shaped image recording medium, and a belt-shaped image recording medium that extends 8! llll transport means, and on the image recording medium to be moved,
In an image display device that displays an image on the recording medium and includes a coloring substance adhering means for adhering a coloring substance corresponding to an image to be displayed, the conveyance means the image recording medium is moved in one direction from a colored substance adhering means, and the colored substance adhering means forms a first display image on the surface of the image recording medium during movement in one direction, and then displays the first display image on the surface of the image recording medium. A first mode in which a second display image is formed in the same direction as the image, vertically and horizontally; and after forming the first display image, a second display image is formed in the opposite direction vertically and horizontally from the first display image. The apparatus further includes a selection means that can arbitrarily select between the first mode and the second mode.

[Function] According to the present invention, a belt-shaped image recording medium, a conveyance means for moving the image recording medium in the longitudinal direction, and a belt-shaped image recording medium that is arranged on the moving image recording medium in accordance with the image to be displayed. In an image display device that displays an image on the recording medium, the conveyance means moves the image recording medium in one direction from the coloring substance attachment means, and the image display device displays an image on the recording medium. The adhesion means forms a first display image on the surface of the image recording medium when moving in one direction, and then forms a second display image in the same vertical and horizontal directions as the first display image, or or a second display image is formed in the opposite direction vertically and horizontally from the first display image, or is configured to be optionally displayed, and the image display section is exposed or visually blocked. By providing the means, it is possible to arbitrarily switch between double-sided display and single-sided display, and in the case of single-sided display, by visually blocking other display surfaces, it is possible to switch between double-sided display and single-sided display. It is possible to make it impossible to observe the formed image displayed upside down from the outside.

[Embodiment] FIG. 1 shows a first embodiment of the present invention, which is configured to display images on both the front and back sides, and includes a belt-shaped image recording medium and the image recording medium. It is equipped with a conveying means for moving the image recording medium in the longitudinal direction, and a colored substance applying means for depositing a colored substance on the moved image recording medium in accordance with the image to be displayed, and its features are as follows. In the image display section, a writing medium having a transparent area and an opaque area is arranged on the entire surface of the recording medium, and the transparent area and the opaque area of the writing medium are moved according to a display mode.

In FIG. 1, 1 is a toner, 4 is a recording electrode, 5 is an image recording medium, 8 is a magnetic brush roller which is a cleaning member, 10 is a toner container, 11 is a support roller which is a recording medium support member, 12 is a main body frame, 13 is a recording control unit, 14a
.

14b is a transparent plate attached to the opening of the main body frame 12.

In the above configuration, an image is formed on the image recording medium 5 by adhering or not toner 1 depending on the signal voltage from the recording electrode 4. For example, an image is formed through a process in which toner 1 adheres to the recording medium 5 when a signal voltage of 60 V is applied from the recording control section 13, and does not adhere when it is Ov. An image is formed with the toner 1, and after the recording medium 5 is conveyed in the direction of the arrow and displayed, it is erased by the magnetic brush roller 8, which is a cleaning member, and is again ready for the next recording.

In addition, the image display section is covered with transparent plates 14a and 14b in order to prevent the toner 1 inside the device from leaking to the outside and to prevent the image formed on the image display section from being destroyed by some external action. .

In this first embodiment, the belt-shaped image recording medium 5 has three parts.
It is placed on two supporting rollers 11, and is moved in the longitudinal direction using one of them as a driving roller.

There are various methods for attaching a colored substance to an image, but in this first embodiment, the method described in Japanese Patent Publication No. 51-46707
A so-called magnetic stylus method described in the above publication was used. As shown in FIG. 5, this method uses a conductive magnetic toner 1 as a coloring substance, transports it over a non-magnetic cylinder 3 by a rotating magnet 2, and transfers it to a recording electrode 3.
A voltage is applied to the recording electrode 4 at the position corresponding to the image signal to cause the recording electrode 4 to adhere to the image recording medium 5 composed of an insulating layer 6 and a conductive layer 7 to obtain an image.

Other examples include an electrostatic recording method in which a static latent image of an image pattern is created in advance on a recording medium, and then colored particles are attached to the recording medium by passing through a developing device, and an electrostatic recording method in which colored particles are attached to the recording medium by passing through a developing device, and Means for supplying toner to the recording medium and applying a signal voltage according to the image pattern between the recording medium and the recording electrodes can be used.

As the image recording medium 5, an endless belt-shaped medium is used, in which an insulating layer or a resistive layer is provided on the surface of a conductive support or a support provided with a conductive layer. Since it is difficult to create a large-area image recording medium seamlessly, the image recording medium 5 is used with one or two seams. If the thickness of this seam is thicker than the distance between the tip of the recording electrode 4 and the image recording medium 5, when passing through the seam,
The non-magnetic cylinder 3 is moved to prevent contact between the recording electrode 4 and the joint portion.

In this first embodiment, the means for conveying the 11 image recording media 5, that is, the three support rollers 11, are replaced by the means for attaching the colored substance, that is, the rotating magnet 2, the non-magnetic cylinder 3, the recording electrode 4
Then, the image recording medium 5 is moved in the direction of the arrow to a circuit that applies an image signal to the recording electrode 4, and an image is formed by the above-mentioned colored substance adhering means.

Further, transparent plates 14a and 14b are fitted in the image display sections A and B, and a medium 15a has a transparent area and an opaque area on the entire surface of the transparent plates 14a and 14b.

15b are arranged respectively.

FIG. 2 is a diagram of the first embodiment viewed from the A side or the B side, and since both the A side and the B side have basically the same configuration, in FIG. 2, the transparent plate 14a, 14b with code 14
The media 15a and 15b are represented by 15, and only one side thereof will be explained.

The medium 15 is stretched in a plane between rollers 17 and 18, and one end is wound around the roller 17, and the other end is wound around a roller 19 via a roller 18. Near the roller 18, the medium 15 is placed on the roller 1.
A light source (not shown) and a mirror 20 are provided for reading the image written on the medium 15 when the medium 15 is wound onto the medium 15. As described in the publication, the information is read by a reading element such as a CCD and recorded by a printer. This configuration is similar to the configuration of the board recording device disclosed in Japanese Patent Application No. 81-45792, which was previously filed by the present applicant.

As described above, the medium 15 has a transparent area and an opaque area, and is moved by the rollers 18 and 19 so that the area covering the image display part becomes a transparent area and becomes an opaque area.

The display adhering means forms a first surface image on the surface of the image recording medium 5 when it moves in the direction of the arrow, and after the first display image is formed, it forms a first surface image on the surface of the image recording medium 5. a first display mode in which a second display image is formed in the same direction as the first display image, vertically, horizontally, and after forming the first display image;
A second display mode is provided in which a second display image is formed upside down, left and right, and the first display mode and the second display mode can be arbitrarily selected by a switch. It is configured as follows.

Next, the operation of the above device will be explained step by step.

After forming the first display image, a mode in which a second display image is formed in the same direction as the first display image, up, down, left and right, is defined as a first display mode. For example, when displaying an image, the image recording medium 5 stops and displays the image on the A side. In this case, if the medium 15a covering the transparent plate 14a is moved to the transparent area, the displayed image can be observed from side A, but if the medium 15b covering the transparent plate 14b is moved to the opaque area, the displayed image can be examined from side A. The displayed image cannot be observed from the front.

When rewriting an image, the image recording medium 5 is conveyed in the direction of the arrow, and recording of the first image starts when the leading edge of the image forming position reaches the position of the recording electrode 4 in relation to the seam. The first image is recorded from the top end of the image so that it is in a normal state when viewed from the A side.

Although the position where the second image is formed has no particular relation to the position where the first image is formed, recording is performed from the upper end of the image. A magnetic brush roller 8 is provided to erase the image.

The first display image and the second display image are oriented vertically and horizontally in the same manner as in a normal image display device.

After forming the first display image, a second display mode is defined as a mode in which a second display image is formed in the opposite direction to the first display image, vertically and horizontally. In this case, the medium 15b covering the transparent plate 14b
By moving the screen so that it becomes a transparent area, the displayed image can also be observed from the B side.

The image recording medium 5 stops when displaying an image and closes the transparent plate 14a.
, 14b. When rewriting an image, the image recording medium 5 is conveyed in the direction of the arrow, and recording of the first image starts when the leading edge of the image forming position reaches the position of the recording electrode 4 in relation to the seam. The first image is A
When viewed from the side, the image is upside down, horizontally and vertically reversed, and recording is performed from the bottom edge of the image so that it is in the normal position on the B side.

The image forming position of the second image is determined so that when the first image stops at the regular position on the B side, it will be at the regular position on the A side, and recording is performed from the upper end of the image. This allows images to be displayed on both the A side and the B side. 1st
The image and the second image may be the same image or different images. A magnetic brush roller 8 is used to erase the image.
is provided.

The first display image and the second display image can be reversed vertically and horizontally in the following manner.

There are various sources of human power for images, but in the case of images stored in semiconductor memory, reading from the top or bottom can be performed relatively freely. When displaying a document printed on paper, it is necessary to read it with a photographing element, but the read signal can also be directly led to a display device. In this case, the image reading device is synchronized with the display device, and first scans the document from the top edge to the bottom edge to display the first side, then stops at the end and displays the second side. To do this, read and scan in the opposite direction, vertically and horizontally. This method synchronizes the data read out by the CCD sensor with the clock pulse (CL) and inputs the data into the shift register, and the output is stored in the RAM in order.When the RAM is full, the CPU Parallel-to-serial conversion is performed simultaneously with the address (ADR) designation, and the image is reversely shifted, so that the output is applied to the above-mentioned recording electrode 4 through the driver circuit.

In this first embodiment, in the case of single-sided display, the image is displayed on side A, and the medium 148 is placed in the transparent area and the medium 14a is placed in the opaque area. Of course, the medium 14a may be moved to the opaque area and the medium 14b may be moved to the transparent area. In this case, it is sufficient to write the image from the top.

Furthermore, this display mode is set as the third display mode and the first
It may also be used in conjunction with the second display mode and arbitrarily selected using a switch.

FIG. 3 shows a second embodiment of the present invention, in which the first embodiment
Although the second embodiment is basically the same as the first embodiment, the characteristics of this second embodiment are that a transparent sheet is used as the recording medium, and the image display areas on the front and back sides are covered with two half mirrors, respectively. Illumination means for illuminating the image display sections on the two sides are provided inside the device, and the illumination means for illuminating the image display sections on the front and back sides do not illuminate the other side.

In FIG. 3, the reference numerals are the same as in the first embodiment.

21a is a fluorescent lamp on the A side, 21b is a fluorescent lamp on the B side, 22a and 22b are semitransparent plates, and 24a and 24b are half mirrors on the A side and B side, respectively. A partition 23 is provided between the A side and the B side, so that the light emitted by the fluorescent lamp 21a does not leak to the B side, and the fluorescent lamp 2
The light irradiated by 1b is designed not to leak to the A side.

Note that a sealing member or the like is provided between the partition 23 and the support roller 11 to prevent light from leaking. In addition, since the image recording medium 5 is transparent, the semi-transparent plates 22a and 22b
Fluorescent light 21 passes through the image recording medium 5 when viewing the display surface.
It is provided so that a and 21b cannot be seen. The color of the plates 22a and 22b is different from that of the toner 1, such as white.

In the above configuration, an image forming method, a cleaning method,
The means for conveying the image recording medium is the same as in the first embodiment.

The colored substance adhering means forms a first display image on the surface of the image recording medium 5 when the image recording medium 5 moves in the direction of the arrow;
After this first display image is formed, a first
A first mode in which a second display image is formed in the same direction as the display image, vertically and horizontally; and after forming the first display image, a second display image is formed in the opposite direction, vertically and horizontally, from the first display image. a second mode in which the first mode and the second mode are formed;
The mode is configured such that the mode can be arbitrarily selected using a switch.

Next, the operation of the above device will be explained step by step.

After forming the first display image, a mode in which a second display image is formed in the same direction as the first display image, up, down, left and right, is defined as a first display mode. For example, the image recording medium 5 stops when displaying an image and displays the image on the A side. In this case, if the fluorescent lamp 21b is turned off, the half mirror 24
Since it becomes a mirror, the image information of the previous page of side A, which is displayed upside down on side B, cannot be observed from the outside.

The image recording medium 5 is stopped when displaying an image, and the fluorescent light 21a is turned off.
is turned on, and the irradiated light passes through the translucent plate 22a, the transparent image recording medium 5, and also the half mirror 24a, so that the image formed on the image recording medium 5 can be observed from the outside.

When rewriting an image, the image recording medium 5 is conveyed in the direction of the arrow, and recording of the first image starts when the leading edge of the image forming position reaches the position of the recording electrode 4 in relation to the seam.

Note that when the image recording medium 5 is being transported, the fluorescent lamp 2
1a is turned OFF, and half mirror 24a is used as a mirror.
The image being formed cannot be observed from the outside.

The first image is recorded from the top end of the image so that it is in a normal state when viewed from the A side.

Although the position where the second image is formed has no particular relation to the position where the first image is formed, recording is performed from the upper end of the image. A magnetic brush roller 8 is provided to erase the image.

The first display image and the second display image are oriented vertically and horizontally in the same manner as in a normal image display device.

After forming the first display image, a second display mode is defined as a mode in which a second display image is formed in the opposite direction to the first display image, vertically and horizontally.

The image recording medium 5 is stopped when displaying an image, and the fluorescent light 21a is turned off.
, 21b are turned on, and the translucent plate 22a is turned on.

22b1 Image recording medium 5, half mirror 24a, 24b
Display images through.

When rewriting an image, the image recording medium 5 is conveyed in the direction of the arrow, and recording of the first image starts when the leading edge of the image forming position reaches the position of the recording electrode 4 in relation to the seam. The first image is upside down and horizontally upside down when viewed from side A, and
Record from the bottom edge of the image so that it is in the correct position on the front side.

The image forming position of the second image is determined so that the first image is at a predetermined position on the B side, and recording is performed from the upper end of the image. This makes it possible to display images on both the A-side and B-side. The first and second images may be the same image or different images. Note that while the image recording medium 5 is being conveyed, the fluorescent lights 21a and 21b are turned off, and the half mirrors 24a and 24b serve as mirrors, making it impossible to observe the image being formed from the outside. By doing so, when the first image passes through the A side, the upside-down, left-right, and upside-down images cannot be visually seen from the outside.

The method of turning the first display image and the second display image upside down, left and right, may be performed in the same manner as in the first embodiment.

In addition, each of the fluorescent lamps 21a and 21b can be turned on manually.
It may also be possible to turn it off. It is possible to arbitrarily select whether or not to display each of the A side and the 8th side on the image recording medium 5.

And, of course, when the device is not powered on,
The fluorescent lights 21a and 21b are turned off, and the half mirror 2
4a and 24b act as mirrors by reflecting light from outside the device.
The image recording medium 5 can no longer be observed from the outside. This second
According to the embodiment, when no image is displayed on the image display section, the image display device can also be used as a mirror.

You can also manually turn on and off the fluorescent lights 21a and 21b.
By making it possible to display the image on the image recording medium 5, you can arbitrarily select whether or not to display the image on the image recording medium 5. Images can be displayed or hidden from view.

In addition, the fluorescent lamp 21a,
If you turn off 21b, the half mirror will not work during that time.
24a and 24b serve as mirrors to reflect light from outside the device. For example, if such a sequence is incorporated into a system that transmits image information to an image display device by means of communication, it will be possible to determine whether or not image information has been transferred, since the half mirrors 24a and 24b are normally mirrors. It's obvious at a glance. After viewing the transferred image information, turn on the fluorescent light 2.
If 1a and 21b are manually turned off, half mirrors 24a and 24b become mirrors again.

[Effects of the Invention] As explained above, according to the present invention, a belt-shaped image recording medium, a conveyance means for moving the image recording medium in the longitudinal direction, and a belt-shaped image recording medium are provided on the image recording medium to be moved. In an image display device that displays an image on the recording medium and includes a coloring substance adhering means for adhering a coloring substance corresponding to an image to be displayed, the conveyance means the image recording medium is moved in one direction from a colored substance adhering means, and the colored substance adhering means forms a first display image on the surface of the image recording medium during movement in one direction, and then displays the first display image on the surface of the image recording medium. The second display image is configured to be able to arbitrarily select whether to form the second display image in the same direction as the image, or to form the second display image in the opposite direction from the top, bottom, left and right to the first display image. However, by providing an opening on the front and other sides and a means for exposing or visually blocking the image recording medium from the opening, it is possible to switch between double-sided display and single-sided display at will. In the case of single-sided display, by visually blocking the other display surface, it is possible to make it impossible to observe the formed image displayed upside down on a surface other than the desired display surface.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a perspective view of the main part of FIG. 1, FIG. 3 is a sectional view showing a second embodiment of the invention, and FIG. FIG. 2 is an explanatory longitudinal cross-sectional view showing the principle of the image forming means shown in the figure. 1... Toner 3... Non-magnetic cylinder 4...
-Recording electrode 5...Image recording medium 8...Magnetic brush roller 11...Support roller 13...Recording control section 15.15a, 15b--Medium 20...Mirror 22a, 22b... Translucent plates 24a, 24b...Half mirror 1O...Toner container 12...Body frame 14.14a, 14b--Transparent plate 17.18.19...Rollers 21a, 21b--Fluorescence Akira and 4 others

Claims (1)

[Scope of Claims] 1. A belt-shaped image recording medium, a conveying means for moving the image recording medium in the longitudinal direction, and a colored substance corresponding to the image to be displayed on the moving image recording medium. In the image display device for displaying an image on the recording medium, the conveyance means moves the image recording medium in one direction from the coloring substance attachment means. , and after forming a first display image on the surface of the image recording medium when moving in one direction, the colored substance adhering means forms a second display image in the same direction as the first display image, vertically and horizontally. a first mode of forming a display image; and after forming the first display image;
a second mode in which a second display image is formed vertically and horizontally opposite to the first surface image, and the first mode and the second mode can be arbitrarily selected. An image display device comprising a selection means. 2. The image display device according to claim 1, further comprising a blocking means for visually blocking the image display section. 3. The image display device according to claim 2, wherein in the first mode, one image display section is visually exposed and the other image display section is visually blocked. 4. The image display device according to claim 2, wherein in the second mode, both image display sections are visually exposed.