JPH01163772A - Copying device - Google Patents

Abstract

PURPOSE:To color a background with the output of an image in an original in specific color by a simple operation by developing by means of one developing device which is selected and developing an electrostatic latent image of the original formed on a photosensitive body based on the number of times of transfer with color different from a coloring area. CONSTITUTION:Coordinates 44a and 44b of the original 41 are specified and inputted from a switch box 33. Then, a copying key is depressed, and based on erase data formed by a picture processing part 32, a device 9 fully projects laser beams on the whole part other than a dot coloring area on a photosensitive drum 6 which corresponds with the area formed by coordinates 44a and 44b, and further projects laser beams in the form of spot on a spot-coloring area. Then the original is dot-developed by a developing device. Next, duplicated image formation on two surfaces with respect to a spot erasing image output 51 is started. The electrostatic latent image of the original 41 is developed to a black-colored image, and black character images 52a and 52b are transferred and fixed to the refed output 51. Thus, the background of an image on the original is colored and outputted in specific color.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides a copying apparatus that recognizes different color image areas on a document from reflected light exposed to the document and forms images of different colors for each color region. It is related to.

[Conventional technology]

Conventionally, in this type of device, such as an analog copying machine, a latent image is erased by emitting light from, for example, an LED array onto an area specified by an erase area specifying means provided in an operation unit, such as a digitizer or numerical input. A model equipped with an erase function has been commercialized. In addition, in a digital copying machine, such as a laser beam printer, image information read from a reader is temporarily buffered in memory, and when masking processing is specified for area data specified from the operation panel, A model has also been commercialized that is configured to perform image processing to convert the image information stored at the address corresponding to the area data into white image information, and to easily erase the specified image and make a trimmed copy. ing.

Incidentally, recent image processing apparatuses are configured so that a plurality of development units can be exchangeably housed, and when performing trimming copying as described above, trimming copying can be performed in a desired copy color, There is an increasing demand for obtaining a well-designed or impressive copied image by multiple-transferring trimmed images of different colors onto a single transfer sheet.

[Problem that the invention seeks to solve]

However, in order to perform the color trimming copy described above with an analog copying device, a complicated key is required to specify the inside or outside of the color area to be copied in the original, and then repeat erase and development processing on the image for that area. There are operational problems in that the user is not able to fully utilize the functions, as it requires a lot of practice and waste of paper to obtain the optimum color cutout image.

This invention was made in order to solve the above-mentioned problems, and by irradiating light in a spot or all over the photoreceptor corresponding to a designated area and outside of this area, the image on the original is changed. It is an object of the present invention to provide a copying device capable of outputting a multicolor image with a colored background.

[Means for solving problems]

A copying apparatus according to the present invention includes an area specifying means for specifying a colored area of a specific color in a document, and an image area of a photoreceptor corresponding to a colored area of a specific color specified by the area specifying means in a spot shape. Developing an image area of the photoreceptor corresponding to the colored area of a specific color designated by the erasing means and the area specifying means by any one of the plurality of developing units, and The image forming apparatus is provided with a development control means for developing an electrostatic latent image of a document formed on a photoreceptor in a color different from that of a colored area based on the number of transfers.

(Operation) In the present invention, the eraser means spots-erases the image area of the photoreceptor corresponding to the colored area of a specific color specified by the area specifying means, and the development control means erases the area specified by the area specifying means. The image area of the photoconductor corresponding to the colored area of a specific color is developed by one of the development units selected from among the plurality of development units, and the image area of the original formed on the photoconductor is developed based on the number of transfers. The latent image is developed in a color different from the colored area.

〔Example〕

FIG. 1 is a cross-sectional view illustrating the structure of a copying apparatus showing an embodiment of the present invention. Reference numeral 1 denotes an original table glass, on which a color original, which will be described later, is placed at a predetermined position. Reference numeral 2 denotes an original irradiation lamp composed of, for example, a halogen lamp, which exposes the original placed on the original table glass 1. Scanning mirrors 38 to 3C are housed in an optical scanning unit (not shown) and guide reflected light from the original to the CCD unit 4 while reciprocating in the main scanning direction. The CCD unit 4 includes an imaging lens 4a,
Equipped with a switching filter that separates the reflected light into colors based on the copy color information specified from the switch box described later.
For example, the image sensor 4b includes a COD image sensor, a non-filter image sensor 40, and the like. Reference numeral 5 denotes a folding mirror, which folds back the reflected light imaged by the imaging lens 4a onto the photosensitive drum 6. Reference numeral 7 denotes a pre-exposure lamp, which eliminates the charge on the photosensitive drum 6 in preparation for image formation. A charger 8 charges the photosensitive drum 6 uniformly. Reference numeral 9 denotes an eraser unit serving as the eraser means of the present invention, which is composed of, for example, a semiconductor laser, and is used to perform coloring specified and input from a coordinate information input means such as a switch box or digitizer, which will be described later, in parallel with the document exposure of the optical scanning unit. The image area of the photosensitive drum 6 corresponding to the area is irradiated with a laser beam in the form of a spot, and the formed electrostatic latent image is erased in the form of a spot. Note that if this erase processing is performed in parallel with the document exposure, a desired area can be erased without performing blisscanning.

1Q is a fixed type developing device, and stores black toner, for example. Reference numeral 11 denotes a replaceable developing unit, which is configured so that the user can easily set it in a predetermined position in the device. 11 is filled. 12a, 1
Reference numeral 2b denotes a paper feed cassette, in which the transfer sheet is fed into the device by driving each paper feed roller 13a, 13b, and is temporarily stopped at the position where the registration roller 14 is disposed, whereupon the transfer sheet is transferred to the image formed on the photosensitive drum 6. The position is timed and re-fed. A transfer charger 15 transfers the toner image developed on the photosensitive drum 6 onto a fed transfer sheet. 1
A separation charger 6 separates the transfer sheet after the transfer operation from the photosensitive drum 6. A conveyor belt 17 conveys the transfer sheet after the transfer process to the fixing device 18.

Reference numeral 19 denotes a flapper that controls the conveyance path of the transfer sheet that has undergone the fixing process in either the direction in which the paper discharge tray 20 or the intermediate tray 22 is disposed.

Feed rollers 21a to 21d feed the transfer sheet, which has undergone the fixing process once, to the intermediate tray 22 after being reversed (multiple) or non-reversed (double-sided).

Reference numeral 23 denotes a re-feeding roller which feeds the transfer sheet placed on the intermediate tray 22 again to the registration rollers 14 via the paper bus 24.
Transport it to the installation position. Reference numeral 25 denotes an exposure shutter that controls to block the image light scanned by the folding mirror 5 in accordance with the image area detected by the image sensor 4b and the no-filter image sensor 4c.

Note that image control and color conversion development processing are carried out by R provided in the control section C0NT which also serves as development control means of the present invention.
It is comprehensively controlled based on a control program stored in the OM.

FIG. 2 is an enlarged perspective view of main parts for explaining the configuration and control system of the eraser unit 9 shown in FIG.
Components that are the same as those in the figures are given the same reference numerals.

In this figure, 31 is a manuscript, for example, the letter P (red)
The image 31a is placed on the document table glass 1 with the image surface facing downward. 32 is an image area processing unit;
Switch box 33 that also serves as area specifying means of this invention
Specified copy color designation and erase area designation information (for example, erase data including spot erase area data consisting of diagonal coordinate values) are input from (provided on an operation unit not shown). 32 is an image processing unit that creates erase data for spot driving the eraser unit 9 based on copy color designation and erase area designation information designated from a switch box 33 (provided in an operation part, not shown), and creates erase data for spot-driving the eraser unit 9; to be memorized. For example, the image processing unit 32 uses the internal memory 32 during multiple one-sided transfer.
The drive of the eraser unit 9 is controlled while referring to the erase data stored in a. That is, in multiple one-sided transfer, the entire surface of the photosensitive drum 6 other than the spot erase area is irradiated with a laser beam, the spot erase area is irradiated with a laser beam on the spot, and in multiple two-sided transfer, the eraser unit 9 is irradiated with a laser beam. The drive stops.

Next, the color image recognition erase processing operation according to the present invention will be explained with reference to FIG.

FIG. 3 is a schematic diagram illustrating the color image recognition erase processing operation according to the present invention. Reference numeral 41 denotes a document, which is composed of, for example, a black character image 42 for the character "0" and a black character image 43 for the character "P," especially black characters. In the image 42, the area to be spot colored in red is located at a diagonal coordinate point 44a,
44b is conceptually shown. This coordinate point 44a, 4
4b is input from the switch box 33, for example.

51 is a spot erase image output, which is an area other than the erase spot data created by the image processing unit 32 based on the coordinate points 44a, 44b input from the switch box 33 and the area formed by the coordinate points 44a, 44b based on the erase data. The photosensitive drum 6 is irradiated with a laser beam over its entire surface, and the area formed by the coordinate points 44a and 44b is spot-irradiated with the laser beam. In the image output, a spot-shaped colored area 51a is the first in the area formed by the coordinate points 44a and 44b.
Formed and output during surface transfer.

When the fixing operation is completed, the spot erase image output 51 is transported toward the intermediate tray 22 by the operation of the flapper 19, and is transported to the position where the registration rollers 14 are arranged by the drive of the refeed roller 23. Ru.

52 is the second side image output, and spot erase image output 5
This corresponds to a state in which the black character images 42 and 43 of the original 41 are transferred to and output from the document 41.

The original 41 is placed at a predetermined position on the original platen glass 1 shown in FIG.
, 44b, the image area processing unit 32
The erase spot data and erase data are stored in the internal memory 32a.

When the copy key is pressed in this state, the image forming process on the first side starts, but the exposure of the original 41 is stopped. In this state, when the photosensitive drum 6 starts to rotate, the eraser unit 9 irradiates the entire area with a laser beam except for the area formed by the coordinate points 44a and 44b based on the erase spot data and the erase data, and
a.

For example, the developing unit 1
A spot erase image output 51 is obtained by developing with the red toner contained in 1. Note that since the electrostatic latent image developed by the developing unit 11 is formed in the form of a spot, it is developed into a pale red color (the developing bias or light amount is controlled as necessary).

Next, by driving the flapper 19, the spot erase image output 51 is transferred to the transfer bus to the intermediate tray 22, and by driving the paper refeed roller 23, it is transferred to the registration roller 14.
It is transported to the installation position and stopped at -1. Next, image formation on the multiplexed second side starts, the optical scanning unit starts scanning the original 41, and the reflected light of the original is applied to the photosensitive drum 6.
An electrostatic latent image based on the document 41 is formed.

The spot erase image output 51 is fed when the leading edge of the image is aligned with the photosensitive drum 6, and the black character images 42 and 43 developed in black by the developer 10 are transferred and fixed, as shown in FIG. The second side image output 52 is conveyed and discharged to the paper discharge tray 20 via the flapper 19.

As a result, a two-color copy is obtained in which the black character image 42 is transferred to the red spot-colored (background-colored) area.

Next, the color spot coloring processing operation according to the present invention will be explained with reference to FIGS. 4 and 5.

FIG. 4 is a flowchart illustrating the color spot coloring processing procedure according to the present invention. In addition, (1) to (5)
indicates each step, and each step procedure is stored in a ROM provided in the control unit C0NT that controls the copying apparatus.

First, specify and input the coordinate points 44a and 44b for the original 41 from the switch box 33 (1) 0. Next, wait for the copy key to be pressed. 2) When the copy key is pressed,
Based on the erase data and erase spot data created by the image processing section 32, the eraser unit 9 applies a laser beam to the entire surface of the photosensitive drum 6 other than the spot colored area corresponding to the area formed by the coordinate points 44a and 44b. At the same time, the spot colored area is irradiated with a laser beam in the form of a spot, and spots are developed by the developing unit 11 (3). Next, the red toner is transferred and fixed in spots on the transferred transfer paper.
It is conveyed toward the intermediate tray 22 by the flapper 19 .

Next, the spot erase image output 51 shown in FIG.
4) Check whether the document has been conveyed to the intermediate tray 22, that is, wait for the completion of image formation on the first side. 4) Start multiple image formation on two sides of the conveyed spot erase image output 51, and confirm that the document has been exposed. The electrostatic latent image on the original 41 is developed into a black image by the developer 10, and the third sheet is re-fed.
The black character images 52a and 52b are transferred and fixed to the spot erase image output 51 shown in the figure (5), and the second side image output 52 is discharged to the paper discharge tray 20 via the flapper 19, and the process is completed.

FIG. 5 is a flowchart illustrating the erase processing procedure according to the present invention. Note that (1) to (8) indicate each step.

Original irradiation lamp 2. The optical system composed of the scanning mirrors 3a to 3C is advanced (1), and original exposure of the color original 41 placed on the original platen glass 1 is started. The image area processing unit 32 waits for the optical system to reach the document exposure start position, that is, the image edge 2), that is, the image edge signal that is output when the image edge sensor (not shown) detects a member of the optical scanning system. When the optical system reaches the image tip, the image sensor 4b starts detecting the image area in parallel with the exposure scanning of the optical system, and creates image area data for one line.3) , judge whether it is erased or not, that is, whether it is the first side of multiplexing 4), if No, return, YES
Then, the coordinate point 44 set from the switch box 33
Create erase data based on a, 44b, etc. 5)
, and stored in the internal memory 32a (6). Next, the eraser unit 9 is driven based on the erase data stored in the internal memory 32a to irradiate the erase position of the rotating photosensitive drum 6 with a laser beam over the entire surface or in a spot shape to execute the erase process (7).

Next, the end of the erase area is determined, that is, it is determined whether the erase position is the end of the image (8). If YES, the process ends; if NO, the process returns to step (3).

Note that the image end is determined by a timer that is driven for a certain period of time after the optical system is reversed.

〔Effect of the invention〕

As explained above, the present invention includes an area specifying means for specifying a colored area of a specific color in a document, and an image area of a photoreceptor corresponding to a colored area of a specific color detected by the area specifying means. Developing an image area of the photoreceptor corresponding to a specific colored area specified by the eraser means and the area specifying means by any one of the plurality of developing units selected from the plurality of developing units; We have developed a development control means that develops the electrostatic latent image of the original formed on the photoreceptor in a color different from the coloring area based on the number of transfers. The present invention has excellent advantages such as being able to output an image with a specific background color and, for example, easily outputting a color advertising image that requires impressiveness from a simple character manuscript.

[Brief explanation of the drawing]

FIG. 1 is a sectional view illustrating the configuration of a copying machine showing an embodiment of the present invention, and FIG. 2 is an enlarged perspective view of essential parts illustrating the configuration of the eraser unit shown in FIG. 1 and its control system. , FIG. 3 is a schematic diagram illustrating the color image color conversion processing operation according to the present invention, FIG. 4 is a flow chart illustrating the color spot coloring processing procedure according to the present invention, and FIG. 5 is a schematic diagram illustrating the erase processing procedure according to the present invention. It is a flowchart. In the figure, 4 is a COD unit, 4b is an image sensor, 4C is a non-filter image sensor, 9 is an erase unit, 32 is an image area processing section, 33 is a switch box, and 34 is a driver circuit. Figure 1. Figure 2 Figure 34 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] It has multiple developing units that develop electrostatic latent images formed on a photoconductor into multiple colors, and an original placed on a document table is exposed to light, and an image is formed on the surface of the photoconductor by the reflected light. In a copying apparatus that develops each electrostatic latent image in the developing unit and forms multiple transfers of the developed images on a conveyed recording sheet, an area specifying means for specifying a colored area of a specific color in the document; an eraser for erasing in a spot-like manner an image area of the photoreceptor corresponding to a colored area of a specific color specified by the area specifying unit; The image area of the photoreceptor is developed by any one of the plurality of developing units selected, and the electrostatic latent image of the document formed on the photoreceptor is colored based on the number of transfers. What is claimed is: 1. A copying apparatus comprising: a development control means for developing a region in a color different from that of the region.