JPS62116982A - Image forming device - Google Patents

Abstract

PURPOSE:To provide not only an image forming function, but also an overhead projector function by forming an image of a liquid crystal panel provided to an image forming device upon an external screen through an image forming lens provided outside an image forming device. CONSTITUTION:When a copying machine is used as an overhead projector, a platen 1 is moved to a left-side home position. A light transmission type liquid crystal panel 18 is fixed above then copying machine body and when an operator operates keys of a keyboard 31 to send an image signal, a desired image is formed on the liquid crystal panel 18. An illumination lamp for the overhead projector is provided in the copying machine body below the liquid crystal panel 18, and the lamp 16 is turned on to irradiate the entire surface of the liquid crystal panel 18 with light through a diffusing lens 17, so that the image of the liquid crystal panel 18 is formed on the screen 22 through the image forming lens 20 and a mirror 21.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus configured as a copying machine, a printer, or the like.

Image-forming devices such as copying machines and printers have been widely used in the past, but in addition, for example, in lectures, lectures, conferences, etc., predetermined image information is projected onto a screen using an overhead projector. It is also widely practiced. In this case, a person who needs both an overhead projector and an image forming device must purchase each of them and install them at a predetermined location, which requires a large installation space for two devices.

l carp The present invention has been made based on the above recognition.

The objective is to provide an image forming device that is equipped not only with an image forming function but also with an overhead projector function, and can project image information input through an input device onto a screen.

In order to achieve the above object, the present invention provides a liquid crystal panel on which an image is formed in the main body of the image forming apparatus, and an imaging lens for forming the image on the liquid crystal panel on an external screen is provided outside the main body of the image forming apparatus. We propose the configuration of an image forming device.

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

1 to 4 show an example of an image forming apparatus according to the present invention configured as an electronic copying machine. When this copying machine is used in normal copying mode, there is no difference from conventional copying machines. That is, as shown in FIG. 1, a platen 1 is supported at the top of the copying machine main body so as to be movable in the left-right direction of the figure, and a document for copying (not shown) is placed on top of the platen 1. Press by 2. The platen 1 is moved from the home position shown in FIG. 1 toward the right in the figure, and at this time the light source 3 is turned on to illuminate the surface of the document.

The reflected light passes through an imaging lens 4 for copying and reaches the surface of a photoreceptor 5 whose surface has been charged in advance by a charger 6 and which is driven to rotate clockwise. As a result, the original image is formed on the surface of the photoreceptor to form an electrostatic latent image, and this latent image is visualized by toner when it passes through the developing device 7.

This visible image is transferred by a transfer charger 11 onto a transfer paper 10 fed from a paper feed cassette 9 by a paper feed roller 8 . After the transfer, the surface of the photoreceptor is cleaned of residual toner by a cleaning device 12, and is then moved to a static elimination charger 1.
The transfer paper, on which the visible image has been transferred after being subjected to the static elimination action by the fixing device 3, is discharged onto the paper discharge tray 15 after the visible image is fixed by the fixing device 14.

The illustrated copying machine includes various elements constituting an overhead projector in addition to the above-mentioned image forming elements. That is, as is clear from FIG.
An image signal is input to 8 from a keyboard 31 connected to the main body of the copying machine via a connection cord 30, whereby a predetermined image is formed on the liquid crystal panel 18. In addition, a lighting lamp for an overhead projector (hereinafter referred to as an OHP lamp) is installed inside the copying machine body below the liquid crystal panel 18.
16 is fixed, and this OHP lamp 16 and liquid crystal panel 1
An illumination diffusion lens 17 is fixed between the light source 8 and the light source 8. Furthermore, as is clear from FIGS. 2 to 4, an imaging lens 20 and a mirror 21 are provided outside the copying machine main body, and the imaging lens 20 and mirror 21 are supported by the copying machine main body via a support member 32. or supported on the floor or the like separately from the main body of the copying machine. ○The O
The position of the HP lamp 16 is set.

The illustrated copying machine displays the image on the liquid crystal panel 18 mentioned above and the original for the overhead projector (hereinafter referred to as "copying machine").

An image of an HP manuscript) can be projected onto an external screen 22, and this can be used as an overhead projector when holding meetings, lectures, or the like. When using the copier as an overhead projector in this way, move the platen 1 to the position shown in Figures 1, 3, and 4 (in this example, the home position) instead of the position shown in Figure 2. put.

When projecting an image on the liquid crystal panel 18, the upper surface of the liquid crystal panel 18 is exposed to the outside as shown in FIGS. 1 and 3, and the operator sends an image signal to the liquid crystal panel by operating keys on the keyboard 31. panel 18
form the desired image. At this time, the liquid crystal panel 18
The light passes through the imaging lens 20, is reflected by the mirror 21, and reaches the external screen 22, so that the image on the liquid crystal panel 18 is formed on the screen 22. At that time, the OHP lamp 16 is turned on, and the light is spread through the diffusion lens 17 to cover the entire surface of the liquid crystal panel 18, as in a conventional projector.
By irradiating the light from the HP lamp 16, a bright and clear image can be projected on the screen 22.

The liquid crystal panel 18 includes an input device (keyboard 3 in the example shown).
Since an image is formed by the image signal input from 1), editing and modification of this image can be easily performed. In addition, if it is possible to store image information by using an input device with a memory function, it can be alarmed and displayed on the screen when necessary.
It can be projected onto 2. Generally speaking, when an HP original is projected onto a screen, its resolution is low and the image tends to be unclear, but images on LCD panels have high resolution and are clear, as can be seen from LCD TVs. , a clear projected image can be projected onto the screen 22. Further, if a color liquid crystal panel is used as the liquid crystal panel, a color image can be formed on the screen 22, and if the input device has a variable magnification function, it is natural that the magnification of the projected image on the screen 22 can be easily changed.

When projecting an image of an OHP original, use the OHP lamp 16.
On the liquid crystal panel 18 located in the optical path from to the imaging lens 20, an OHP[1i119 is placed as shown clearly in FIG. 4 and indicated by the chain line in FIG. As the OHP original 19, a transparent or translucent base material such as a synthetic resin film on which a predetermined image is formed is used.

When an OHP document 19 is placed on the liquid crystal panel 18 and the OHP lamp 16 is turned on, the light is spread by a diffusion lens and transmitted through the light-transmissive liquid crystal panel 18 to display the OHP document 19.
The entire surface of the OHP original 19 is illuminated, and the light passes through an imaging lens 20 and a mirror 21 and reaches a screen 22, where an image of the OHP original 19 is formed.

In addition to being able to selectively project images on the liquid crystal panel 18 and the OHP original 19 as described above, the image can also be formed on the liquid crystal panel 18 and the OHP original 19 can be placed on top of the image to create an OHP display.
By lighting the lamp 16, a composite image of both images can be projected onto the screen 22.

The imaging lens 20 is supported movably in its front axis direction, and by adjusting its position, focus adjustment during image projection can be performed.

As mentioned above, since the copying machine itself has an overhead projector function, the user does not need to purchase both the copying machine and the overhead projector and install them separately, reducing purchase costs and saving installation space. can be achieved.

Furthermore, using this copying machine, an OHP document 19 made of film or the like can be created through a normal copying process, and the resulting OHP document can be immediately placed on the liquid crystal panel 18 and projected onto the screen 22. Therefore, it is possible to immediately check the completed status of an OHP manuscript, or to conduct lectures, meetings, etc. efficiently.

Imaging lens 20 and mirror 21 provided outside the copying machine main body
If these supporting devices are made independent of the copying machine body in advance or are detachably connected to the copying machine body, the lens 20, mirror 21, etc. can be attached to the copying machine body when the function of the overhead projector is not required. This prevents them from interfering with copying operations.

In addition, the imaging lens 20 and mirror 21 can be purchased in a so-called optional format, so that users who do not need the overhead projector function can purchase the lens 20 and the mirror 21 at a later date as needed.
By making it possible to purchase the mirror 21, the burden on the user can be reduced.

The present invention can be applied to copying machines other than those shown in the drawings and to various image forming apparatuses 1 other than copying machines; however, as in the shown copying machine, the copying lens 4 is fixed and the platen 1 and pressure plate 2 are moved. When applied to V4 type imaging, when the platen 1 and pressure plate 2 are brought to the position shown in FIG. 1, l! I
The right side of the copier body will be largely exposed, so
Even without making the main body of the copying machine particularly larger than before,
Elements for the overhead projector, such as a liquid crystal panel, can be placed in this space on the right, making it possible to save space or achieve a compact design.

It goes without saying that any suitable device other than a keyboard may be used as an input device for the liquid crystal panel, and that an image signal may be input from a remote location to form an image on the liquid crystal panel.

According to the present invention, since the image forming device itself has an overhead projector function, it is possible to expand the functions of one image forming device, and moreover, it is possible to expand the functions of one image forming device, and moreover, it is not necessary to arrange the image forming device and the overhead projector separately as in the conventional case. It is possible to save installation space compared to the case where Furthermore, since the image on the liquid crystal panel can be projected, it has become possible to obtain a clear image on the screen.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view showing the usage state of an image forming apparatus configured as a copying machine, with the keyboard shown in a perspective view, FIG. 2 an external perspective view of the copying machine, and FIG. The figure is a perspective view showing a situation in which an image on a liquid crystal panel is projected onto a screen, and FIG. 4 is a perspective view showing a situation in which an OHP original is projected onto a screen. 16... Illumination lamp 18... Liquid crystal panel 19
...Original 2o...Imaging lens 22...
・Screen diagram φ

Claims (2)

[Claims] (1) An image forming apparatus characterized in that a liquid crystal panel on which an image is formed is provided in the image forming apparatus main body, and an imaging lens for forming the image on the liquid crystal panel on an external screen is provided outside the image forming apparatus main body. . (2) An illumination lamp for an overhead projector is provided in the main body of the imaging device, the position of the illumination lamp is set so that the liquid crystal panel is located in the optical path from the lamp to the imaging lens, and the overhead projector is placed in this optical path. The image forming apparatus according to claim 1, wherein the image forming apparatus is configured to be able to place a document for use on the image forming apparatus.