JPS61130942A - Copying device - Google Patents

Abstract

PURPOSE:To obtain a distinct image by synchronizing a liquid crystal display driving means and an original scanner driving means so that a range illuminated by a light source of an original scanner is driven to display selectively, when a print of an image which has been brought to a liquid crystal display has been selected by a switching means. CONSTITUTION:In case when an image display onto a liquid crystal display 1 by an external signal has been selected by a selecting switch, as for the liquid crystal display 1, an image is displayed on the whole display area. In case a print of a display image has been selected, first of all, the right and left conversion of the image display is executed. At the time of a display, in case when 'ABC' as seen from above has been displayed onto the liquid crystal display as shown in a figure (a), it becomes an inverted image in case of seeing it from the lower face illuminated by an illuminating lamp of a scanner, and when copying is executed in this state, an inverted image is printed to a print to be transferred. Accordingly, in case a print is made by copying an image on the liquid crystal display, since it becomes an inverted image by seeing it from above as shown in a figure (b), the right and left conversion of the image is required. Subsequently, a copy control is started.

Description

[Detailed description of the invention] The present invention uses contact glass as a liquid crystal display,
The present invention relates to a multifunctional copying apparatus that has the functions of displaying images on a liquid crystal display in response to external signals, printing displayed images, and copying general originals.

If one machine can display an image corresponding to an image signal input from an external device such as a word processor or personal computer, print that image, and copy a general manuscript such as a handwritten manuscript, it can be done by one machine. It has increased utility, is economical, and is advantageous in terms of space.

In response to this demand, the inventors of the present invention have made the contact glass l of an ordinary electrophotographic copying machine into a liquid crystal display as shown in Fig. 1, which makes it possible to display images in response to external signals. By covering the upper surface with the pressure plate 12, the image on the liquid crystal display is illuminated by the light source lamp 41 of the exposure optical system 4, and the photosensitive drum 3 is exposed and scanned.
can be exposed to light to form a latent image 1, which can be used to make copies by normal electrophotographic processes; We have proposed a multifunctional copying device that can be used as a regular contact glass and can make regular copies of handwritten manuscripts.

In Fig. 1, 2 is a charger, 5 is a developing device, and 6 is a charger.
is a paper feed section, 7 is a transfer charger, 8 is a separation charger,
9 is a fixing device, 10 is a cleaning device, and 11 is a static eliminator. The operation of these devices is similar to that of ordinary copying machines. The liquid crystal display 1, which also serves as a contact glass, is the second
As shown in the figure, it is constructed by sandwiching regularly arranged liquid crystal cells 16 between two transparent glass plates 15 and providing a semi-transparent film 17 (half mirror) on the back side, and it becomes a reflective liquid crystal display and when not driven. The contact glass is made to have uniform translucency.

By the way, in a display device such as a display device used in the above-mentioned device in which a large number of display elements are arranged, the display elements are generally connected in a matrix and time-division driving is performed. When using the liquid crystal display used in the above devices as a display, it is necessary to drive the display over the entire displayable area of the display surface, but the image displayed on the liquid crystal display can be controlled by an external signal. When an exposure device for copying an original scans an image from one end to the other and exposes the photoreceptor to print, it is only necessary to drive the display in the area that is illuminated from time to time by the light source 41 of the original scanner. , it is not only unnecessary to constantly display the entire displayable area of the display, but it is also harmful to obtaining clear images because the area illuminated by the light source of the document scanner decreases the proportion of the display area. is 6
1.Object The present invention displays an image corresponding to an external image signal on a liquid crystal display that also serves as a contact glass, illuminates and scans the image with a light source of an original scanner, and produces a print using the same process as original copying. Provided is a copying machine which solves the above-mentioned problems regarding image illumination when printing an image displayed on a liquid crystal display in a copying machine, and which increases the ratio of illumination by a light source to the image display on the head and obtains a clear image. One purpose is to

”Sae ” In order to achieve the above objects, 1. The present invention is expressed in 1.

Print and original copy switching means allows you to change the display image
The present invention is characterized in that the liquid crystal display driving means and the original scanner driving means are synchronized so as to selectively drive the display approximately in the range illuminated by the light source of the original scanner when one digit is selected. .

Hereinafter, the present invention of F9 will be explained in detail based on the drawings showing the embodiments thereof.

FIG. 3 is a flowchart of an embodiment in which the present invention is applied to the copying apparatus shown in FIG. 1, and FIG. 4 is a control block diagram thereof.

When displaying an image on the liquid crystal display 1 using an external signal is selected by the selection switch, the entire display area of the liquid crystal display 1 is displayed as an image.

When printing a displayed image is selected, horizontal conversion of a single image display is first performed. The reason for this is explained with reference to FIG. 5. When rA'BCJ is displayed on the liquid crystal display 1 as shown in FIG. If copying is performed in this state, a reverse image will be printed on the completed print. Therefore, when creating a print by copying the screen on a liquid crystal display, it is necessary to perform horizontal conversion of one image so that it becomes an inverted image when viewed from above, as shown in Figure 5 (b). . Next, copy control starts.

In that case, as shown in the block diagram of Fig. 4, the synchronization signal controls the drive of the scanner and the liquid crystal display (LC, D).
The display range is controlled in synchronization with the drive control of the scanner so that the range illuminated by the illumination lamp of the scanner matches the range where the image is displayed on the liquid crystal display, and the display range moves along with scanning. ``Therefore, the ratio of the illumination area to the display area increases dramatically, and clear I
A W image is obtained.

When this copying apparatus is used as a normal copying machine for copying originals, the 1 display control "
Copy control starts immediately with print control rNOJ.

In addition, as shown in Figure 6, in order to make the display of the liquid crystal display easier to see, it is made to be able to stand upright around its front edge, and when displayed, it is held upright as shown in Figure (b), and when printing is made by copying the image. (a) Also when it is tilted to a horizontal position as shown in the figure.

When copying, it is necessary to flip the image horizontally.

However, as shown in Figure 7, when displaying by standing upright with the rear edge of the liquid crystal display as the axis, you will be looking at the bottom surface of the liquid crystal display when it is horizontal. There is no need to flip the image horizontally.

As described above, according to the present invention, when producing an external print (No. 3) by copying an image displayed on a liquid crystal display, the ratio of the illumination range by the light source lamp of the document scanner to the image display range is The image quality increases dramatically, making it possible to obtain clear images.

[Brief explanation of the drawing]

[Figure] is a sectional view showing the overall configuration of a copying machine to which the present invention is applied, Figure 2 is a sectional view of a part of the liquid crystal display, Figure 3 is a flow chart of an embodiment of the present invention, and Figure 4 is a sectional view showing the overall configuration of a copying apparatus to which the present invention is applied. Its control block diagram, FIGS. 5(a) and 5(b), is an explanatory diagram showing a state in which the display on the liquid crystal display is left and right reversed, and FIGS. 6 and 7 respectively show other control blocks to which the present invention is applied. FIG. 3A is a perspective view of an example of a copying apparatus showing the position of a liquid crystal display during copying, and FIG. 1.Contact glass and liquid crystal display 4.Exposure optical system (scanner) 111..Light source lamp agent Patent attorney Hisashi Ito Knee'-.vJG mortar (a) (b,)

Claims (1)

[Claims] The contact glass is a liquid crystal display, a liquid crystal display driving means displays an image according to an external image signal on the liquid crystal display, and the image displayed on the liquid crystal display is a light source of a document scanner driven by a document scanner driving means. A print corresponding to an external image signal is produced by illumination and exposure scanning, and the document can be copied using the non-driven liquid crystal display as a contact glass. In an electrophotographic copying apparatus having a switching means for selectively switching copying of an original, when printing of the image displayed on the liquid crystal display is selected by the switching means, the liquid crystal display driving means and the original scanner driving means are configured to A copying apparatus characterized in that a range illuminated by a light source of a document scanner is synchronized so as to selectively drive a display.