JPH04134333A - projector - Google Patents

Abstract

PURPOSE:To enable a screen to be used at a light place and to copy and deliver a copied substance or the copied substance where a character on a blackboard is retouched on that occasion by forming the screen of a opalescent-color material. CONSTITUTION:The screen is formed of the opalescent-color material which is a light transmission type screen 36 where writing can be executed, and this projector is provided with projection means 42 and 47, first exposure means 48-51, a read means 40 which reads data on the concerned screen, a second exposure means 52 which exposes the read data and developing fixing means 56 and 70 which develope an exposed photosensitive recording medium. Thus, the character or a graphic written on a transmission type original can be projected on the screen 36 by light from a light source 42 from the back surface of the screen 36. Besides, it can be exposed on the photosensitive recording medium and the copy thereof is obtained by developing it.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to an overhead projector (hereinafter referred to as OH).
(referred to as P)・It relates to projectors and copy blackboards that project sheets and slides.

[Prior Art] In a conventionally known projector, as shown in FIG. The light was reflected by a reflecting mirror 24 and projected onto a screen 25 that was separate from the main body.

In the conventional copy blackboard, as shown in Fig. 6, when you write letters or figures on one side of the writing medium stretched out like a screen using a writing instrument such as a felt-tip pen, and then want to copy them, If you press the designated copy button (not shown),
This writing medium 1 is wound around a roller 3 by driving a motor 2.

At this time, the light source 4 is turned on and the light is irradiated onto the surface of the writing medium, and the irradiated light is received by the photoelectric conversion element 6 via one optical system 5. The image information detected by this photoelectric conversion element 6 is transmitted to the element peripheral circuit 7 and the control circuit 8.
The image data is stored in the image memory device 9 via the print control circuit 10, and is sent to the printing pad 11, where it is recorded on the recording paper 13 on the platen roller 12. Also, when you want to make multiple copies of the same content, you can specify the number of copies when you first operate the switch button, and the image information stored in the image memory device 9 can be transferred to the print via the control circuit 8. 11, and the required number of sheets are printed on 13 sides of the recording paper.

[Problems to be Solved by the Invention] However, the above-mentioned conventional projector requires two devices, a projector and a screen, and requires a large installation space. Not being able to see the screen clearly,
The disadvantages were that it could not be used in bright places and that the screen could not be moved while taking pictures.

Further, according to the conventional copy blackboard described above, a CCD image sensor is generally used as the photoelectric conversion element 6, but the pixel information detected by this sensor is simply output processed as a binary signal of white and black. color output is not possible.

Furthermore, when it comes to images with gradation, such as photographs, there is a drawback that even if dither is applied, the image becomes rough.

The present invention has been made in view of these conventional drawbacks, and its purpose is not only to be able to copy the contents of the projected original and the characters, figures, pictures, etc. added to the screen. To provide a projector that requires only a small installation space, allows everyone to see the screen clearly, can be used in a bright place, and allows the screen to be moved while taking pictures. be.

[Means for Solving the Problem] In order to achieve this object, a projector according to the present invention includes a light-transmissive writable screen, a light source that irradiates the screen with light, and a document that is projected onto the screen by the light source. a first exposure means for exposing the original onto a photosensitive recording medium; a reading means for reading data on the screen; and a second exposure means for exposing the read data onto the photosensitive recording medium. In the projector provided with a developing and fixing means for developing the exposed photosensitive recording medium, the screen is formed of a milky white material.

[Function] According to the projector of the present invention with such a configuration,
Since the screen is made of milky white material, characters and figures written on transmissive documents such as OHP paper can be projected onto the screen using light from a light source from the back of the screen, and characters and figures written on the surface of the screen can be projected onto the screen. You can see the shapes.

Further, the photosensitive recording medium is exposed to light by another light source on the back side of the original document, and is developed by a developing machine to obtain a copy thereof.

Furthermore, since the screen is made of a milky white material, it is possible to write on it from the surface of the screen, and the text, figures, and pictures added on the screen are read by the image scanner on the front right side and then reflected by the light source on the back side. Written on a photosensitive recording medium and exposed to light, developed by a developing machine,
You will get a copy of it.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 and 2 are perspective views of a projector according to an embodiment of the present invention seen from the front and back, and FIGS. 3 and 4 are schematic configuration diagrams seen from the side and back.

A screen 36 made of a milky white material and capable of being written on with a felt pen or the like is attached within the front frame of the panel frame 34 vertically supported by the legs 32. On the back side of the screen 36, an image reflecting mirror 38 is rotatably attached to the upper part of the panel frame 34, and is fixed in the open position by a stay 39. At one end of the front side of the panel frame 34, a scanner 40 is provided along the screen 36, which can read the image projected on the screen 36 and the characters written on the screen 36. , has a structure that allows scanning in the H direction.

On the other hand, a projector lens 47 is provided below the image reflection mirror 38, and an OHP
A light-transmissive document table 44 on which a sheet 46 is placed is arranged. Below it is a mirror 45 that reflects the light emitted from the projector light source 42 at right angles toward the document table 44.
is attached so that it can rotate in the directions of arrows E and F. The projector light source 42 is disposed at a position bent at a right angle to the document table 44 by a mirror 45, and is always cooled by a fan 43 while the projector light source 42 is turned on.

The copy portion 100 includes a document table 44 , a Fresnel lens 110 movably mounted below the document table 44 , a reflector 83 movably mounted on the document table 44 , and a mirror plate 83 mounted on the document table 44 . An exposure unit 50 consisting of a copy light source 48 movable in both directions A and B to scan and expose an OHP sheet 46, which is a copied original, and a plurality of folding mirrors 49, and a folding mirror 5 fixed to the main body side.
1 and an LED 52 that exposes the image read by the scanner 40.

The photosensitive recording medium 53 used in this apparatus is, for example,
The main material is a photocurable resin using a well-known photopolymerization initiator as shown in Publication No. 2-143044, and it has red,
Microcapsules containing a photocurable resin that hardens when exposed to light of green and blue wavelengths and cyan, magenta, and yellow dye precursors are coated on a base sheet. The photosensitive recording medium 53 is housed in a cartridge 54 so as not to be exposed to light. The photosensitive recording medium 53 includes an exposure table 5 for exposing the photosensitive recording medium 53 from within the cartridge 54 to form a color latent image.
5, through a pressure developing device 56, a separation roller 58 for separating the pressure-developed photosensitive recording medium 53 and the color developer sheet 60, and is routed to a take-up roller 59. The pressure developing device 56 is comprised of a photosensitive recording medium 53 on which a latent image is formed by exposure, and a pair of pressure rollers 57 for overlapping a color developer sheet 60 and developing it under pressure.

The color developer sheet 60 is constructed by applying a color developer disclosed in, for example, JP-A-58-88739 onto a base paper, and is placed in the cassette 61 so that the developer coated surface faces upward. It is set.

At the top of the cassette 61, a suction cup 62 for feeding the developer sheets 60 one by one is arranged.

The heat fixing device 70 includes a heat roller 71 having a built-in heater 75, an endless belt 74 installed between the heat roller 71 and the roller 72, and used for coloring and glossing the color developer sheet 60, A pressure roller 73 applies a predetermined pressure to the heat roller 71 so that the color developer sheet 60 and the endless belt 74 are brought into close contact with each other.
It is composed of. A paper discharge tray 76 is attached to the outside of the heat fixing device 70.

Next, the configuration of a control circuit for exposing data read by the scanner 40 to the LED 52 will be described with reference to FIG.

The electronic control circuit 91 includes a central processing unit 92 (hereinafter referred to as CPU) that processes various calculations, and a read-only memory 93 that stores data used for calculations and control in advance.
(hereinafter referred to as ROM), random access memory 90 (hereinafter referred to as R
AM), scanner 40 and panel switch 101
The input interface 9'4 receives input signals from the LED control circuit 102, and the output interface 95 outputs output signals to the LED control circuit 102.

The operation of the image recording apparatus configured as above will be explained.

When using it as a projector, as shown in FIG. Place the OHP sheet 46 on the document table 44 and turn on the power switch.Then, the mirror 45 is set at a predetermined position in the direction of arrow F, and the reflector 83 is retracted in the direction of the arrow.Then, the projector light source 4
The light emitted from the screen 2 is reflected by a mirror 45, transmitted through an original platen 44 and an OHP sheet 46, condensed by a lens 47, reflected again by an image reflection mirror 38, and projected onto a screen 36.

Furthermore, when making a copy of the OHP sheet 46 placed on the document table 44, the mirror 45 is rotated in the direction of the arrow E, and the reflector 83 is moved in the direction of the arrow. While pressing, move the Fresnel lens 110 in the N direction.Then, press the copy start button (not shown).
When pressed, the copy light source 48 lights up and the exposure unit 50 scans and exposes in the B direction, as shown in FIG. The reflected light from the OHP sheet 46, which is an original, is reflected by a folding mirror 49 and a fixed folding mirror 51 to expose a photosensitive recording medium 53. In synchronization with the scanning of the exposure unit 50, the photosensitive recording medium 53 is moved in the same direction. When the exposure for one screen is completed, the exposure unit 50 moves back in the six directions of the arrow and returns to its original position. On the other hand, a latent image of a desired color image is recorded on the photosensitive recording medium after exposure.

The photosensitive recording medium 53 is conveyed by rollers 81 and 82 to the pressure roller 57 of the pressure developing device 56, and is stopped when the leading edge of the latent image reaches the pressure roller 57.

In synchronization with the movement of the photosensitive recording medium 53, the developer sheet 60 is fed out from the cassette 61 by a suction cup 62 until the tip of the developer sheet 60 corresponds to the tip of the latent image on the photosensitive recording medium 53. After being transported, it stops.

Next, the pressure roller 57 of the pressure developing device 56 is rotated in the direction of the arrow and pressed against the roller 57 by a well-known driving device (not shown). Then, the photosensitive recording medium 53 is sent while being pressed while being overlapped with the color developer sheet 60, and the uncured microcapsules on the photosensitive recording medium 53 are destroyed by the pressure, and the latent particles on the photosensitive recording medium 53 are destroyed. A color image corresponding to the image is developed on the developer sheet 60.

The color developer sheet 60 is separated from the photosensitive recording medium 53 by the separation roller 58 and guided toward the heat fixing device 70 .

In the heat fixing device 70, the color developer sheet 60 is pressed against the endless belt 74 by a heat roller 71 and a pressure roller 73, and is brought into close contact with the heater 75.
is heated to accelerate the development of color images. At the same time, the binder polymer (binder resin) for fixing the color developing medium to the base paper of the color developer sheet 60 is thermally melted, and the surface becomes smooth and the surface of the color developer sheet 60 has a moderate gloss. can get. The color developer sheet 60 that has been subjected to color development and gloss treatment is separated from the endless belt 74 by the curvature of the roller 72 and is discharged to a paper discharge tray 76 .

Further, when copying an image projected on the screen 36 or characters written on the screen 36, a scanner 40 provided on the right side of the front of the screen 36 is used.

If monochrome is acceptable, the screen 36 is scanned once in the direction of arrow G. The read data such as images and characters is temporarily stored on the RAM 90, which is taken in through the input interface 94 shown in FIG. The stored data is sent to the LED control circuit via output interface 95.

The LED 52 corresponds to red, green, and blue wavelengths, and the photosensitive recording medium 5 is connected according to the transmitted data.
3 to form a monochrome latent image.

If you want to output in full color, scan it through red, green, and blue filters, store the data corresponding to red, green, and blue on the RAM 90, and then
This is obtained by sequentially transmitting the data to the D control circuit.

If you want multiple copies, specify the number from the operation panel and you will receive copies for the specified number of schools.

Note that the light source for exposing the data read by the scanner 40 is not limited to an LED, but may be an LCD, a laser, or the like.

Furthermore, the image added on the screen 36 can be immediately OH
It is also possible to copy it onto a P sheet, create an OHP sheet on the spot, and project it on the screen 36.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention,
When used for pre-sensation, it can be used in bright places, the screen angle can be changed or the location can be moved while the image is displayed on the screen, and
The effectiveness of presentations can be greatly improved, such as by being able to make and distribute copies of OHP sheets and copies of OHP sheets with added text on the blackboard on the spot.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a copy blackboard with a projector seen from the side according to an embodiment of the present invention, Fig. 2 is a perspective view of the copy blackboard with a projector seen from the back, and Fig. 3 is a schematic configuration of the copy blackboard with a projector seen from the side. 4 is a schematic configuration diagram of the same as seen from the back side, FIG. 5 is a block diagram showing the electrical configuration, and FIG. 6 is a block diagram showing the schematic configuration of a conventional copy blackboard.
FIG. 7 is a schematic diagram of a conventional OHP. In the figure, 36 is a screen, 48 is a copy light source, 42 is a projector light source, 45 is a mirror, 44 is a document table, 46 is a lens, 38 is an image reflection mirror 50 is an exposure unit, 4
0 is a scanner, 52 is an LED, 56 is a pressure developing device, 7
o is a heat fixing device.

Claims (1)

[Claims] 1. A light-transmissive writable screen, a light source that irradiates the screen with light, a projection unit that projects an original onto the screen from the light source, and a method for exposing the original onto a photosensitive recording medium. a first exposure means for reading the screen; and a second exposure means for exposing the read data onto the photosensitive recording medium.
What is claimed is: 1. A projector comprising: an exposure means; and a developing and fixing means for developing the exposed photosensitive recording medium, wherein the screen is formed of a milky white material.