JPS62288863A - Color copying device - Google Patents

Abstract

PURPOSE:To optionally select a monocolor having a delicate hue, by providing a monocolor mode and causing the hue to be selected optionally at the time of monocolor mode. CONSTITUTION:At the time of the monocolor mode, an optional hue is produced by respectively adjusting volumes 32-34 of red, green, and blue. When, for example, the volumes 32 and 33 of red and green are made equal to each other, yellow is obtained, but, by changing the levels of the volumes, different densities of yellow can be obtained. Moreover, when the volume 32 of red is set a little larger than the volume 33 of green, reddish yellow can be obtained. In order to easily determine the color of a monocolor, respective lamps 36-38 are turned on and adjusted in accordance with the values of the red, green, and blue volumes 32-34 and the hue of the monocolor is selected while the color of the monocolor is confirmed through a color generator.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Technical Field) The present invention relates to a color copying apparatus, and more specifically, a color copying apparatus having a monochrome mode that can be applied to color inkjet printers, color thermal transfer printers, etc. This invention relates to copying devices.

(Prior Art) Various color copying devices have been developed and put on the market, but in this type of color copying device currently on the market, the monochrome modes are yellow, magenta, cyan, red, green, and blue. It is limited to six colors, and there are still no other products that can produce subtle color tones.

(Objective) The present invention was developed in order to solve the above-mentioned problems, and an object of the present invention is to provide a color copying apparatus that can arbitrarily select monochrome colors with delicate tones.

(Structure) In order to achieve the above object, the present invention disposes a plurality of developing devices around the photoreceptor, separates the original into colors, forms a latent image for each color, and repeats development and transfer to obtain a color image. The color copying apparatus is characterized in that it has a monochrome mode, and the color tone in the monochrome mode can be arbitrarily selected.

Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

FIG. 1 is a schematic diagram illustrating the structure of a mechanical section of an embodiment of the present invention. In particular, this color copying apparatus separates an original image into colors using a scanner, reads image information for each of a plurality of color components, and reads the image information for each color component. The component image information is developed for each color based on the recorded image information for each recorded color.

In FIG. 1, 1 is an image scanner, 2 is an image processor and controller, and 3 is a plotter.

In the image scanner 1, 4 is a document, 5 is a platen, 6.7.8 is a first . Second and third mirrors, 9 a lens, 10 a dichroic mirror, 1). Reference numerals 12 and 13 are solid-state image sensors made of charge-coupled devices. In the plotter 3, 14 is a laser writing unit, 15 is a photoreceptor, 16 is a charger, and 17a to 17d are magenta (M
), cyan (C), yellow (Y) and black (B) developing devices, 18 is a transfer drum, 19 is a transfer corona unit,
20 is a sensor, 21 is a registration roller, 22 is a paper feed roller, 23 is a transfer paper, 24 is a charge eliminating corona unit, 25 is a fixing device, and 26 is a cleaning unit.

In the above configuration, the original 4 is placed on the platen 5 and illuminated by a fluorescent lamp for illuminating the original. The reflected light is reflected by the movable first mirror 6, second mirror 7, and third mirror 8, and passes through the imaging lens 9 to the dichroic mirror 1.
Enters 0. The dichroic mirror 10 separates the light into three wavelengths, namely red (R), green (G) and blue (B). ). It is incident on 12.13.

The output signals from these C0DII and 12.13 are subjected to the necessary processing by the image processor (image processing unit) 2, and the recorded color information of black (BK) and yellow (Y) is processed.
, magenta (M), and cyan (C) are converted into binary signals for recording activation. These signals are emitted by the laser writing unit 14 to the photoreceptor 15 as laser light.

On the other hand, the surface of the photoreceptor 15 is uniformly charged by a charging corona unit (charger) 16 and a latent image is formed by laser light. This latent image is developed into black by a black (B) developing device 17d, and is transferred by a transfer corona unit 19 onto a transfer paper 23 wound around a transfer drum 18. Photoreceptor 15
The residual toner on the top is removed by a cleaning unit 26.

These steps are cyan (C) and magenta (M).

Yellow (Y) is sequentially applied to create a color image on the transfer paper 23. The transfer paper 13 on which the color image was obtained is transferred to the transfer drum 18
The image is then separated, fixed by the fixing device 25, and discharged from the apparatus.

The transfer paper 23 is fed one by one from the paper feed roller 22 and comes into contact with the registration roller 21 . This registration roller 2
1 rotates at a predetermined timing and is clamped to the transfer drum 18 (the clamping mechanism is not shown). In FIG. If there is no transfer paper at a predetermined timing after rotation, it is determined that the paper is not being fed or there is a paper jam, and the developing roller and pumping roller (described later) are left in the counterclockwise direction of rotation and the developing function is stopped, or the device to stop.

As described above, each color is developed, so when one color is being developed, other developments must not be performed at all. FIG. 2 schematically shows an enlarged structure of the developing section in the above embodiment. In Figure 2,
The same parts as in FIG. 1 will be described with the same reference numerals. As described above, the magenta developer 17a is located around the bottom of the photoreceptor 15.

A cyan developer 17b, a yellow developer H17C, and a black developer 17d are arranged. 27a to 27d are developing rollers of each developing device; 28a to 28d are pumping rollers;
9a to 29d are paddles, 30a to 30d are doctors, 31
A to 31d are stirring screws.

In this developing mechanism section, during development, the developing roller 27a
~27d, pumping roller 28.1)~28d, and paddles 293~29d rotate clockwise, and the developing roller 27
Magnetic brushes are formed on a to 27d, while developing rollers 27a to 27d and a pumping roller 28a are used when not developing.
~28d counterclockwise to prevent magnetic brush formation. Such counterclockwise rotation causes the adjacent magnets inside the pumping rollers 28a to 28d to have the same polarity, and the developer is not pumped up. The pumping roller 28a is rotated clockwise, and the developing rollers 27b to 27d and pumping rollers 28b to 28d of the other developing Q units 17b to 17d are rotated counterclockwise.

In the color copying apparatus having the above-described configuration, the present invention enables setting of a monocolor mode in addition to the full color mode, and in this monocolor mode, red, green,
By adjusting each blue color, it is possible to create any desired color tone.

Next, adjustment of red, green, and blue in monochrome mode will be explained with reference to FIGS. 3 and 4. FIG. 3 shows a front view of the display device, and FIG. 4 shows its circuit diagram. In these figures, 32 is a red (R) volume, 33 is a green (G) volume, 34 is a blue (B) volume, and 3 is a red (R) volume.
5 is a transparent light plate, 36 is a red lamp, 37 is a green lamp, 38
is a blue lamp, and 39 is a reflecting mirror.

According to the display device with the above configuration, any color tone can be created by adjusting the red, green, and blue volumes 32 to 34, respectively. For example, red and green volume 3
Yellow can be obtained by setting the values of 2 and 33 to the same value, but even if the values are the same here, by changing the levels, it is possible to change the density of the same yellow.

Also, by setting the red volume 32 to a slightly larger value, a reddish yellow can be created. In this way, it is thought that there are many color tones and densities that can be created by each volume value of 1.32 to 34.

In order to easily determine this monochrome color, this display device uses lamps 36 to 38, respectively, according to the values of red, green and blue volumes 32 to 34, as shown in the circuit diagram of FIG. Adjust the lighting and install it as a color generator in the display device. In FIG. 3, this color generator shows only the transmitting light plate 35 and the lamp is omitted. Third
The display device shown in the figure can also be replaced with a liquid crystal panel.

FIG. 5 shows a block diagram of an image processing section for converting a document into monochrome color according to each volume value of the display device shown in FIGS. 3 and 4. In the figure, 32 is a red volume, 33 is a green volume, 34 is a blue volume, 40 is a complementary color synthesis unit, 41 is a monocolor detector, 423
~42d is a monocolor/full color switching section, 43 is a monochrome temporary line, 44 is a full color temporary line,
453 to 45c have cyan, magenta, and yellow values of V CXMN /64. VM XMN /64 and VyXM are circuit parts that change at l/64.

Furthermore, 101 is a shading correction circuit, 102 is a multiplexer, 103 is a γ correction circuit, 104 is a complementary color generation,
Black core circuit, 105 is an average data compression circuit, 106 is a masking processing circuit, 107 is a UCR processing circuit, 108
c, 108m, and 108y are buffer memories for cyan, magenta, and yellow, respectively; 109. is a gradation processing circuit, 1) 0 is a data selector, 1) 1 is a synchronization control circuit, 1) 2 is a laser driver, 1) 4 is a laser, 1) 5 is a peak detection circuit, 1) 6 is a binarization circuit , 1) 7 is an external interface circuit. Further, 201 is an input/output port, 201a is an input port of the input/output port 201, and 20
1b is its output port, 202 is the CPU, 203 is the RA
M, 204 is ROM.

205 is an input/output port, and 206 is an address, data, and control bus.

Regarding the image processing section having the above-described circuit configuration, only the essential parts of the present invention will be explained, and the explanation of other details will be omitted. The outputs of the monocolor/full color switching sections 423 to 42d pass through the line 43 to the monocolor detector 4 during monocolor switching.
Enter 1. This monocolor detector 41 is yellow (Y)
, magenta (M), cyan (C), and black (BX) are added and divided by 4 to obtain the average MN of 4 degrees for each of yellow, magenta, cyan, and black0.
Vc XMN for the following cyan, magenta, and yellow values
/ 64. VN xMs/64 and vv×~I
The circuit parts 45a to 45c that change at N/64 have the maximum density of MN as the color determined by the volumes 32 to 34, and are hereinafter referred to as M.
The values of yellow, magenta, and cyan are changed depending on the density of W.

According to the above embodiment, red, red,
By adjusting the volumes of green and blue, you can select a monochrome tone while checking the monochrome color using the color generator.

Although this embodiment has been described with respect to a color copying apparatus, it is obvious that the present invention can also be applied to color inkjet and thermal transfer printers.

(Effects) According to the present invention, it is possible to provide a color copying apparatus which has the effect of making an infinite number of monocolors on a container and arbitrarily selecting them in a monochrome mode. can.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the structure of a mechanical section of a color copying apparatus according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing an enlarged view of the developing section of FIG. 1, and FIG. 4 is a front view showing a monochrome display device of the copying apparatus, FIG. 4 is a circuit diagram of the display device of FIG. 3, and FIG. 5 is a circuit diagram showing an image processing section of the color copying device according to the present invention. 32...Red volume, 33...Green volume, 3
4... Blue volume, 40... Complementary color synthesis section, 41.
...Monocolor detector, 42a to 42d...Monocolor/full color switching section. Figure 1 Figure 2

Claims (2)

[Claims] (1) A color copying device that has multiple developing devices arranged around the photoreceptor, separates the original into colors, forms a latent image for each color, and repeats development and transfer to obtain a color image, which has a monocolor mode. A color copying apparatus characterized in that the color tone in the monochrome mode can be arbitrarily selected. (2) A color copying apparatus according to claim (1), further comprising a color display section that displays an arbitrarily selected color tone.