JPH0241249A - Electrophotographic apparatus - Google Patents

Abstract

PURPOSE:To provide an electrophotographic apparatus having high operability and universality by providing an exposure optical system for introducing an image to a photosensitive unit with an input side disposed over the suitable length of a main scanning direction at part of the sub scanning direction of the screen of a display unit, and detachably providing an image processor, the optical system and a controller to the display unit. CONSTITUTION:An image processor 100 and an exposure optical system are provided in an apparatus body 20, and mounted on the top of a display unit 1 having a CRT 1a. In the optical system, one end of an optical fiber cable 2 is disposed oppositely to a section A over the whole width of a main scanning direction at the top end of the screen of the CRT 1a, a lens eye 3 is disposed at the other end, and the image of the section A is exposed to the surface of a photosensitive drum 4 through the eye 3. A controller 50a of the control system generates the output data of a microcomputer 60 as a video signal, the CRT 1a receives it and displays it on the screen. A controller 50b writes the output data of the microcomputer 60 in a VRAM 40, and reads it when it is displayed on the screen of the CRT 1a and printed, and applies a control signal to the processor 100.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrophotographic apparatus equipped in a device equipped with a raster scan type display device such as a CRT, such as a word processor or a computer.

[Prior art]

An optical printer is a type of printer installed in devices such as word processors or computers. This includes, for example, laser diodes and polygon scanners, LIE
The exposure section is a D array, a fluorescent lamp and an LCS array, or the like.

[Problem to be solved by the invention]

By the way, when using an optical printer, if you consider the display device as one light-emitting part, there are two light-emitting parts along with the exposure part of the optical printer, and each is used only for displaying or printing. I can't say that. Furthermore, if the display device and the image processing section are integrated, the image processing section will be located in front of the display device, that is, on the operator side, so only the display device will be used without printing operations. Poor workability. Furthermore, the image processing unit cannot be used for other display devices, resulting in very poor versatility.

The present invention has been made with this in mind, and aims to provide an electrophotographic device that has a single light emitting section that can handle both functions, and that is highly workable and versatile. do.

(Means for Solving the Problems) An electrophotographic apparatus according to the present invention is an electrophotographic apparatus that uses a part of the screen of a raster scan type display device as an exposure device, and includes a photoreceptor. an image processing unit that transfers and fixes an image developed and formed by exposure to a sheet of paper; The image processing section, the exposure optical system, and the control section are provided with an exposure optical system that guides an image of a portion to the photoconductor, and a control section that causes the operation of the image processing section to be performed in association with the scanning of the display device. It is characterized in that it is configured to be detachably attached to the display device.

[Effect]

When the image processing section, the exposure optical system, and the control section are attached to the display device, the exposure optical system is connected to an image processing section that guides an image of a part of the screen of the display device, which the incident side of the exposure optical system faces, to the photoreceptor of the image processing section. In this case, the control section performs an operation associated with the scanning of the display device, and the image displayed on the portion of the display device is exposed to the photoreceptor, developed, and transferred and fixed onto the paper.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on drawings showing embodiments thereof. FIG. 1 shows an electrophotographic apparatus (hereinafter referred to as
FIG. 2 is a schematic longitudinal cross-sectional view showing a state in which a display device (referred to as the device of the present invention) is attached to a display device. The apparatus of the present invention includes an image processing section 100 and an exposure optical system inside the apparatus main body 20, and a raster scan type display device equipped with a CRT la.
It is designed to be mounted on top of the machine. An optical fiber cable is used for the exposure optical system, and one end of the optical fiber cable 2, which is formed by arranging a plurality of optical fibers in a line corresponding to the main scanning width of the screen of the CRT la, is connected to the upper edge of the screen of the CRT la when attached. It is arranged so as to face a part A (electrophotographic exposure part) spanning the entire width in the main scanning direction of the part. The other end of the optical fiber cable 2 is
A lens array 3 is provided, which is made up of a plurality of convergent rod lenses aligned and extended to have a length approximately equal to the width of the parallel optical fibers. The light is focused on the surface of the photoreceptor drum 4 through the photoreceptor drum 4, that is, exposed to light. The configuration and operation of the image processing unit 100 are similar to those of a known electrophotographic apparatus, and the photosensitive drum 4 is driven to rotate in the direction of arrow a, and the rotation of the drum at the portion where light from the lens array 3 is focused is similar to that of a known electrophotographic apparatus. A charging charger 5 is disposed at a position on the upstream side in the direction of rotation, and a developing device 6 is disposed at a position on the downstream side in the same (rotational direction). An electrostatic latent image corresponding to the image of the portion A of the screen exposed by the optical fiber cable 2 and the lens array 3 is formed at that portion.The developing device 6 converts this electrostatic latent image into a toner image. Visualize.

A transfer charger 7 is provided above the photoreceptor drum 4. The transfer charger 7 is inserted between this and the photoreceptor drum 4 through a paper feed port provided on the front side, and a paper feed roller 11 is inserted between the transfer charger 7 and the photoreceptor drum 4. Then, an electric field is applied from the upper surface of the paper sheet fed by the registration rollers R, and the toner image is transferred onto the paper sheet.

A cleaning device 8 is provided at a position on the downstream side of the transfer charger 7 in the rotation direction of the photoreceptor drum 4, and the cleaning device 8 uses a blade method to remove toner remaining on the surface of the photoreceptor drum 4.

An eraser lamp 9 is provided between the cleaning device 8 and the charger 5, and the eraser lamp 9 removes the charge remaining on the surface of the photoreceptor drum 4 by irradiating light in preparation for the next image processing. .

The paper to which the toner image was transferred in step 7 during transfer charging is
After the toner image is sent to the fixing roller 12 and melted and fixed by heat, it is ejected from the paper ejection port in the direction of the arrow and placed on the face-up tray 14.

FIG. 2 is a block diagram showing the configuration of a control system when printing is performed using the display bag Wl by the apparatus of the present invention.

First, I will explain the basic configuration that does not have a print function. This is the keyboard 70 shown outside the dashed line.
A keyboard 70 that performs input is connected to the microcomputer 60, and the microcomputer 60 connects the CRT la to the CRT la via the controller 50a for controlling the image display of the CRT la. Connect with. The controller 50a is a microcomputer 60
For example, if it is a character, a character pattern to be displayed as an actual character on the screen of the CRT la is generated as a video signal based on the data output by, for example a character code, and the CRT la receives this and displays the character on the screen. Display.

Now, when adding the control system of the device of the present invention shown within the dotted chain line in the figure, the controller 5 in the basic configuration described above
0a and CRT la are not directly connected, but the controller 5
0a is connected to a controller 50b provided to control the display system and image processing system of the CRT la, and this controller 50b and the CRT la are connected. A VRAM 40 having a storage area in one-to-one correspondence with the screen of the microcomputer 60 and CRT la is connected to the controller 50b, respectively.
b writes data corresponding to the output signal of the microcomputer 60 into the VRAM 40, and reads it when performing screen display and printing on the CRT la.

The controller 50b is also connected to the image processing section 100, and is configured to give a control signal to the image processing section 100.

Now, the operating procedure and operation when printing a document or the like created using the display device 1 using the apparatus of the present invention configured as described above will be explained.

First, when the operator commands the start of printing using the keyboard 70, the controller 50b sends the image data of the screen to be printed from the microcomputer 60 to V.
Data is written into the RAM 40 except for the portion corresponding to the electrophotographic exposure section A, and data to be displayed on the electrophotographic exposure section A of the CRT la is sequentially written into the portion of the VRAM 40 corresponding to the electrophotographic exposure section A. At the same time, the controller 50b operates the charger 5, developer 6, and transfer charger 7 of the image processing section 100, raises the temperature of the fixing roller 12 to a temperature at which good fixing can be performed, and further charges the fixing roller 12 by the operator. The paper is conveyed to registration rollers R and temporarily stopped.

Next, the controller 50b reads out the written data and sequentially displays the read data on the electrophotographic exposure section A of the screen of the CRT la. This display is shown in the electrophotographic exposure area A as shown in Figure 1.
The text is scrolled from the bottom of the characters at the end of the document in the direction of arrow C at a predetermined speed synchronized with the rotational speed of the photosensitive drum 4 over a predetermined number of lines (or only one line is fine). As a result, the photosensitive drum 4 is exposed to light via the optical fiber cable 2. Thereafter, the registration rollers R feed out the paper in synchronization with the image on the photosensitive drum 4 so that the image on the photosensitive drum 4 is transferred to a predetermined position on the paper. As a result, an image of the document is formed on the paper, and the paper on which the image has been formed is discharged onto the face-up tray 14 with the print side facing up and the tail of the document positioned on the front side.

Note that the document display start part and scroll direction in the display control described above are determined so that the printed paper can be ejected onto the face-up tray so that the operator in front can easily see the printed paper. It is not limited.

Further, although the above-described display control is configured so that the controller 50a is not used, the controller 50a may be used instead.
The screen to be printed using the video signal of a is CRT l
The controller 50b stores the data on the same screen in the VRAM 40.
It may also be configured such that the data is written to the screen, and the data is sequentially read out from the top of the screen and displayed on the electrophotographic exposure section A.

FIG. 3 is a schematic vertical cross-sectional view showing another embodiment of the device of the present invention mounted on the display device 1.
It is arranged opposite to the bottom of RT la,
The electrophotographic exposure section of the CRT la uses the lower end B of the screen. The exposure optical system uses a lens array 3a arranged with its entrance side facing the electrophotographic exposure section B, and the photosensitive drum 4a of the image processing section 100a is arranged on the exit side of this lens array 3a. The configuration of the image processing section 100a is the same as the first embodiment except that the arrangement of each component is different (the same numbers are appended with "a"), but the paper is provided at the lower front of the device main body 20a. The paper is loaded from the paper feed slot,
A conveyance path is formed such that the paper is discharged from a paper discharge port provided at the upper part thereof to the front side in the direction of the arrow with the printed surface facing upward, that is, face up. The configuration and operation of the control system are exactly the same as those shown in FIG.

In the two embodiments described above, the position of the electrophotographic exposure section on the screen of the display device is either the upper end or the lower end of the screen, but the present invention is not limited thereto.

〔·effect〕

As described above, in the electrophotographic apparatus according to the present invention, since a part of the screen of the display device installed in a device such as a word processor or computer is used as an exposure device, the display device can also be effectively used for printing. , it is possible to omit print head equipment such as a laser diode in an optical printer, and costs can be reduced. Furthermore, since the main body of the device is detachable from the display device, it does not impede workability when only the display device is used, and it is also possible to handle multiple display devices with one device of the present invention. , the present invention has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view showing how the electrophotographic device according to the present invention is mounted on a display device, FIG. 2 is a block diagram of its control system, and FIG. 3 is a schematic vertical cross-sectional view showing another embodiment. It is a front view. DESCRIPTION OF SYMBOLS 1... Display device 1a... CRT 2... Optical fiber cable 3... Lens array 4... Photosensitive drum 50a. 50b...Controller 100...Image Processing Department Agent Patent Attorney Noboru Kono 0a Figure 2 Portion 1

Claims (1)

[Scope of Claims] 1. An electrophotographic device that uses a part of the screen of a raster scan type display device as an exposure device, which is equipped with a photoreceptor and is capable of developing and forming an image by exposing the photoreceptor to light. an image processing unit that transfers and fixes the image onto the paper; and an exposure unit that directs the image of the part to the photoreceptor by exposing its incident side over a suitable length in the main scanning direction in a part of the screen of the display device in the sub-scanning direction. an optical system; and a control unit that causes the image processing unit to operate in association with scanning of the display device, and the image processing unit, the exposure optical system, and the control unit are configured to be detachably attached to the display device. An electrophotographic device characterized by: