JPS63238760A - Displaying and copying device - Google Patents

Abstract

PURPOSE:To read and copy both the recording and the projected image with use of writing materials by displaying the projected image projected from the rear surface of a displaying plate body at the front surface of the displaying plate body and scanning the front surface of the displaying plate body with a reading mechanism. CONSTITUTION:A displaying plate body 1 is composed of a surface layer 5, a scattering layer 6 and a transparent body layer 7 to be able to write a recording (y) with writing materials and eliminate it arbitrarily. By the projecting from an overhead projector 4 to locate at the back of the displaying plate body 1, a projected image (x) is image-formed at the displaying plate body 1. The recording (y) is written with the writing materials on the front surface of the displaying plate body 1. The recording (y) and the projected image (x) can be watched from the front surface of the displaying plate body 1. When copying is executed, a reading mechanism 2 scans the front surface of the displaying plate body 1, reads the recording (y) and the projected image (x) and the recording (y) and the projected image (x) are copied on a paper with a copying mechanism 3.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a display-copying device called a so-called electronic blackboard, and particularly to a display-copying device capable of copying projected images. be.

[Prior art and its problems] A so-called electronic blackboard includes a display board body having a surface on which records can be recorded with a writing instrument or the like and the records can be arbitrarily erased, a reading mechanism (so-called sensor) for reading the displayed records, and a reading mechanism (so-called sensor) for reading the displayed records. This is a display-copying device consisting of a copying mechanism for copying recorded records. The display surface of the display board displays records such as characters 1 drawings 9 tables written with felt-tip pens, markers, chalk, and other writing instruments, and allows some or all of the records to be erased at will by wiping. materials (e.g. fluororesin) or surfaces treated with such materials.

Conventionally, there has been a problem that recording on a display board requires an extremely large amount of labor and time. For example, when writing large records or many records for easier viewing,
The effort and time required to record such information cannot be ignored. Although this problem can be alleviated to some extent by recording in advance before a meeting, etc., the number of recording surfaces on the display board is limited, and it is impossible to prepare many records in advance. It is.

As a means for displaying records prepared in advance, there is a method of displaying a projected image by a projection device such as an overhead projector. Therefore, by utilizing this, it is possible to display both a projected image and a record made by a writing instrument or the like on the display board. This method alleviates the problems associated with the recording described above. For example, by projecting the lines or standard characters on a table and writing the necessary characters on the projected image on the spot, the effort and time involved in writing can be reduced.

However, when a projected image is displayed, there is a major problem in that the projected image cannot be copied. In conventional devices of the type in which the reading mechanism is fixed and the recording surface of the display board is moved beneath it to read the recording, it is difficult to move the projected image together with the written recording. Further, even in this type of device, even in a device in which the reading mechanism runs along the surface of the display panel, the projected image becomes a shadow of the reading mechanism and cannot be read.

The present inventor previously demonstrated that a projection image is displayed on a display board by light projected from the front side (i.e., the front side) on which a record is written by a writing instrument, etc., and a reading mechanism running on the rear side of the display board is used to display a projected image on the display board. We have proposed a display-copying device that reads and copies the projected image and written records. This device has the feature that it is easy to handle because the light projecting device is located on the front side, but the following two problems were found. The first is that when writing a record on the display board while displaying a projected image or erasing a record on the surface of the display board, a shadow of a writing instrument or scribe is created and the display board disappears in the shadowed area. If the projected image of the part of the 0 display board in question where a record is to be written or erased disappears, the writing or erasing operation becomes extremely difficult. The second is that there are two contradictory performances required for the display board, and it is relatively difficult to fully satisfy both of them. In order to do this, a surface layer or an internal layer that diffusely reflects light is required. In order to make the projected image clearer, the diffused reflection rate of the diffused reflection layer must be made higher; on the other hand, the information written on the front surface of the display board by the reading mechanism running on the rear side of the display board. In order to read the records, the display board needs to be transparent. Therefore, if a diffused reflection layer is present between the surface of the display board on which records exist and the reading mechanism, the diffused reflection layer needs to be more transparent. Higher diffuse reflection properties and higher transparency required of a diffuse reflection layer are usually contradictory requirements, and it is difficult to fully satisfy both.

[Means for solving the problems and their effects] The present invention has the following features:
This is a display-copying device that can read and copy both recordings made with a writing instrument, etc., and projected images, which solves the above-mentioned problems. That is, the present invention provides a display board having a surface on which records can be recorded with a writing instrument or the like and the records can be arbitrarily erased, a reading mechanism for reading the displayed records, and a copying mechanism for copying the read records. In the copying apparatus, the display plate forms a projected image projected from the rear side and displays the projected image on the front side,
This is a display-copying apparatus characterized in that the reading mechanism is a reading mechanism that scans the front side of a display board to read a projected image and a record made by a writing instrument or the like.

In the present invention, since the projected image is generated by light emitted from the rear side of the display board, there is no risk of the projected image disappearing due to the shadow of a writing instrument or scribe being cast on the display board. Since it is on the front surface, a reading mechanism operating on the front side can directly read the record.

Therefore, the diffuse reflection layer on which the projected image is formed may be opaque as long as the projected image is visible from the front side (that is, visible to both the display viewer and the reading mechanism), making the projected image clearer. When the reading mechanism scans the surface of the display panel, the display may be obscured by the reading mechanism, but this is only partially and temporarily, and is unlikely to cause any problems.

The display board in the present invention has a layer capable of forming a projected image projected from the rear surface side, that is, a diffuse reflection layer. Moreover, the projection image formed on the diffused reflection layer is displayed on the display panel on the front side (that is, it is visible from the front side).
This means that part of the diffusely reflected light is transmitted to the front side.

A material in which a projected image produced by projecting light onto one surface can be seen from the other surface is known, and hereinafter this material will be referred to as a transmission screen. One example of a transmissive screen is "frosted glass."

That is, a projected image produced by projecting light onto the ground surface of "ground glass" can be seen not only from the ground surface side but also from the smooth surface side. The ground surface of the "frosted glass" is the scattering layer. Even if this scattering layer is opaque, the projected image can be viewed from a smooth surface. This is because the scattered light is not only scattered in the direction in which the light is projected by the scattering layer, but also in the opposite direction (in the case of "frosted glass", the direction toward the smooth surface). Another typical example of a transparent screen is shoji paper. Even though shoji paper is opaque at first glance, the projected image created by light shining onto one surface is visible from the other surface.

The display board in the present invention is a transmissive screen, and like the conventional device, the display surface is a surface on which recording can be made with a writing instrument or the like and the recording can be arbitrarily erased. Examples of materials constituting the surface (i.e., the front surface) include fluororesin, non-adhesive fluororesin treated to impart adhesion, highly adhesive synthetic resin treated to reduce adhesion, There are enamel, glass, etc. These materials are made of sufficiently transparent materials, except when they are scattering layers themselves.The scattering layer of the display panel is located on the front surface, rear surface, or inside the display panel.

The display board is made of a material that is sufficiently transparent (it may be colored and transparent) except for the scattering layer of the display board.For example, the display board is made of a material such as a scattering material such as thin paper or cloth, and a material such as synthetic resin or glass. Transparent bodies that are laminated with transparent bodies, transparent bodies that have fine irregularities formed on their surfaces like "frosted glass," transparent bodies that have opaque particles dispersed in them, and transparent bodies that have scattering layers formed on their surfaces by printing or coating. and so on. The surface on which the record is written may also be the surface of the scattering layer,
In this case, there is a risk that the erasability of the recording will be reduced. Therefore, it is preferable to use a display board whose surface on which records are written is made of a transparent film or sheet, and a scattering layer is provided on the back surface, or the scattering layer is further covered with a transparent material. The body preferably has a certain level of rigidity so that it is easy to write on.

When using the device of the invention, the projection device is usually located on the rear side of the device of the invention. However, if there is no space between the device of the present invention and the projection device, there is a risk that restrictions on the installation location will become greater. A device for displaying and copying projected images can be installed near the wall of the room and does not require space on the rear side. It is preferable to use one reflecting plate provided integrally with the device of the invention, and to reflect the light from the light projecting device by this reflecting plate and then project the light onto the display board. Thereby, the projection device can be positioned on the left and right sides, the top and bottom sides, or the front side of the display panel, and the space on the rear side can be reduced. Furthermore, in order to make the projected image clearer, it is also possible to cover the space between the device of the present invention and the projection device with a dark box or the like to prevent light from entering from outside.

The display/copying device of the present invention can also be used for the purpose of displaying/copying only written records, similar to conventional devices. That is, when a projected image is not displayed, it can be used for the same purpose as a conventional display-copying apparatus. Furthermore, depending on the case, a plurality of surfaces may be used to display written records, regardless of the presence or absence of a projected image. For example, the surface layer (4) in the first embodiment described below may be formed of a long film, and by winding up the film at the end, a plurality of recording surfaces can be formed on the display board. Furthermore, the laminate of the surface layer (5) and the scattering layer (6) (or further the transparent layer (7)) is similarly configured to be movable,
It is also possible to have a plurality of display board surfaces. In addition, the display board configured according to the present invention and the display board that displays only written records (a display board similar to the conventional display board that can display projected images but cannot copy them) are configured to be interchangeable, and the purpose of the present invention is to It is also possible to use one of the display boards depending on the situation.

[First Embodiment] FIG. 1 is an explanatory view showing one example of the device of the present invention, and FIG. 2 is an enlarged cross section of a display board. FIG. 3 is an explanatory diagram of the display board. The device of the present invention includes a display board (1), a reading mechanism (
2) and a copying mechanism (3), the display board (
A projected image (X) is formed on 1), and a record (y) is written on the front surface (left side in FIG. 1) of the display board (1) using a writing instrument or the like. The record (y) displayed on the display board (1) and the projected image (ri) can be seen from the front side. When copying, the reading mechanism (2) scans the front side of the display board (1). , read the record (y) and the projected image (X).The copying mechanism (
3) copies the record (y) and the projected image (x) onto paper or the like based on the electric signal from the reading mechanism (2). In addition, the record (
y) and the projected image (x) have substantially no thickness, but are shown as thick for the sake of illustration. Second
As shown in the figure, the display board body (1) has a surface layer (5) made of a material such as transparent fluororesin, which has a surface on which records (y) can be written and can be arbitrarily erased, and a surface layer (5) made of a material such as paper or cloth. This is a transmission type screen composed of a scattering layer (8) such as a transparent material, and a transparent layer (7) such as a transparent plastic material. As shown in FIG. 3, the display board (1) displays a projected image such as a line and a record (te) such as characters in a composite state, and this display is also copied.

[Second Embodiment] FIG. 4 is a plan view showing another example of the device of the present invention. The display board (1) is the same display board as in the first embodiment. Display board (1).

A reading mechanism (2) that scans the front side of the display board (1)
, and a copying mechanism (3) not shown. A reflection plate (8) is attached to this display plate body (1), and the light emitted from a projection device (not shown) (indicated by a dotted line) is reflected by this reflection plate (8), and then the light is reflected on the display plate (8). The image is formed on the body (1). In the device of the second embodiment, the space on the rear side (right side in the figure) of the display board (1) can be shortened. Furthermore, if the reflector plate (8) can be overlapped with the display plate body when not displaying a projected image, almost no space on the rear side will be required when not displaying a projected image.

[Third Embodiment] FIGS. 5 and 6 are a perspective view and a plan view excluding the upper surface of a dark box, which will be described later, showing another embodiment of the apparatus of the present invention (however, the copying mechanism is not shown).

This device of the present invention includes a display board (1), a reading mechanism (2
), and a copying mechanism (not shown), and since the projected image (4) and the device of the present invention are covered by a dark box (10), the projection device (4) is covered by the dark box (10). Because of this, the projected image (11) becomes clear. In addition, a shielding plate (
11) It is also possible to temporarily erase the projected image by inserting it into the rear side.

[Fourth Embodiment] FIGS. 7 and 8 are a perspective view and a sectional view showing still another example of the device of the present invention. Similar to the third embodiment, the device of the present invention includes a display board (1), a reading mechanism (2), and a copying mechanism (not shown), and the device and the projected image (4) are connected to a dark box (10). It is integrated by Further, a reflection plate (12) is provided in the dark box (lO), and the light from the projection device (4) is reflected by this reflection plate (12) and then focused on the display board (1).

[Brief explanation of the drawing]

1 to 3 are diagrams showing the device of the present invention of the first embodiment, FIG. 1 is an explanatory view, FIG. 2 is an enlarged sectional view of the display board, and FIG. It is. FIG. 4 is an explanatory diagram showing the apparatus of the present invention according to the second embodiment, and FIG. 4 is a plan view showing the apparatus according to the second embodiment. Figures 5 and 6 are the third
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view and a plan view showing an embodiment of the present invention apparatus. 7th
FIG. 8 is a perspective view and a sectional view showing a fourth embodiment of the apparatus of the present invention. 1-Surface plate, 2: Reading mechanism, 3: Copying mechanism, 4: Projection device, 5: Surface layer, 6: Scattering layer, 7: Transparent layer, 8: Reflector, 2: Projected image, y: Recording Record. Figure 1 Figure 2 Feeling 3 Figure 4 Figure! f Figure @b Street

Claims (1)

[Claims] (1) In a display-copying device having a display board having a surface on which records can be recorded with a writing instrument or the like and the records can be arbitrarily erased, a reading mechanism for reading the displayed records, and a copying mechanism for copying the read records. , the display plate body forms a projected image projected from the rear side and displays the projected image on the front side, and the reading mechanism scans the front side of the display plate body to display the projected image. 1. A display-copying device characterized by a reading mechanism for reading records made by a writing instrument or the like.