JPH03144434A - Color image forming device - Google Patents

Abstract

PURPOSE:To perform color correction for a color image in a short time by providing a specifying means for selecting and specifying an original or a recording paper after forming the image and a correcting means for correcting the color of light reflected on the original so that each color may become the same based on the respective colors detected by a color sensor at the time of specifying the original and the recording paper by the specifying means. CONSTITUTION:The color sensor 36 constituted of a detecting part 36a, an original switch 36b and a copying switch 36c is connected to the main body of a copying machine 1 by a cable 37 for detecting the color of the original 4 and the color developing sheet 33 after forming the image. And when the original 4 or the recording paper 33 after forming the image is specified by the specifying means, the detection result by the color sensor 36 is fetched by the correcting means, and the light reflected on the original 4 is color- corrected so that each color may become the same based on the detected result which is fetched at the time of specifying the original and at the time of specifying the recording paper. Thus, the color correction of the light reflected on the original can be automatically performed, so that color correcting work for the color image can be easily performed by anyone.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color image forming apparatus that irradiates a document with light and forms a color image on recording paper based on the reflected light.

[Prior Art] In a conventional color image forming apparatus, a photosensitive material is exposed to light reflected from a document to form a latent image on the photosensitive material, and a color image is formed on recording paper based on the latent image. In addition, a color filter is provided on the optical path from the original to the photosensitive material to selectively transmit light depending on its color, and color correction of the formed image is performed by adjusting the insertion point of the color filter into the optical path. .

[Problems to be Solved by the Invention] However, with this type of device, the user can compare the colors of the original document, etc. and the recording paper, and adjust the insertion amount of the color filter based on the user's own judgment, thereby changing the formed image. Since color correction was performed, there was a problem in that color correction took time. Generally speaking, adjusting the amount of color filter insertion requires skill, so if the user is inexperienced with this adjustment, he or she must be able to form an image on recording paper and repeat the adjustment many times. However, color correction takes time.

Therefore, the present invention has been made with the object of providing a color image forming apparatus that can perform color correction of such a color image in a short time.

(Means for Solving the Problems 1) In other words, the present invention, which has been made to achieve the above object, irradiates an original with light, guides the reflected light from the original to a photosensitive material by the irradiation, and Color image formation comprising: an exposure means that forms a latent image according to the color of reflected light; and an image formation means that forms a color image on recording paper based on the latent image formed on a photosensitive material by the exposure means. In the device,
a color sensor for detecting the color of an object to be measured; a designating means for selecting and specifying an original or recording paper after image formation as an object for color detection by the color sensor; The present invention is characterized in that it is provided with a correction means for color correcting the reflected light from the document so that each color is the same based on the colors detected by the color sensors when paper is specified.

[Operation] In the color image forming apparatus of the present invention configured as described above, when the specifying means specifies an original or a recording paper after image formation, the correction means takes in the detection result by the color sensor and specifies the original. Based on the detection results taken when specifying the time and recording paper, the color of the reflected light from the document is corrected so that the winter mountains are the same.

[Example code] Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram of 18 configurations of a photosensitive and pressure sensitive copying machine to which a color image forming apparatus according to an embodiment of the present invention is applied. In addition,
Photosensitive paper (consisting of microcapsule paper and colored paper) that enables such copying has been proposed in Jibun Sho 58-88739, etc., and will not be described in detail here.

As shown in FIG. 1, the top plate of a photosensitive and pressure-sensitive copying machine (hereinafter simply referred to as the "copying machine") 1 is provided with a movable document table glass 2 and document table cover 3. , an original 4 is set face down on the original table glass 2. In the upper area of the copying machine 1, for example,
A light source 5, such as a halogen lamp, is provided. The light source 5 irradiates light in a line toward the original platen glass through a slit hole formed on the top surface of the copying machine 1, and causes the irradiated light to pass through the transparent original platen glass 2. ing. That is, the light emitted from the light source 5 is
It is reflected by the original 4 set on the original platen glass 2, and as the original platen glass 2 moves, the original 4
exposure scanning will be performed.

The filter unit 6 receives the light reflected by the original 4 and adjusts the color tone of the copied image, and then sends the light to the projection lens 7 . The projection lens 7 receives the light whose color tone has been adjusted by the filter section 6 and projects it onto a pair of reflecting mirrors 8 and 9.

A pair of anti-ohm mirrors 8 and 9 are attached to a mirror mounting plate, and the optical path length and focus are adjusted by sub-adjusting the mounting position of the mirror mounting plate. A pair of reflection mirrors 8 and 9 receive the light projected by the projection lens 7, change the direction of the light as shown in the figure, and reflect the light onto a long microcapsule paper 11 located along the exposure table 10. An image is formed on the site. Note that the heat generated by lighting the light source 5 is discharged to the outside by the cooling blower 12.

As shown in the figure, the microcapsule paper 11 is wound into a roll, and is housed in the main body of the copying machine together with the bent cartridge 15. One end of the microcapsule paper 11 is connected to the feeding port 21a and the guide roller 2.
゜1b, dancer roller 21C1 pressure development installation 22. Feed roller 21d.

It reaches the winding shaft 23 via the separation 1121e and the universal roller 2'lf. microcapsule paper coming out of the discharge port 15a of the cartridge 15] 1 is guided by a feed roller 21a and a guide roller 21b and passes below the exposure table 10, and then is supplied to the pressure developing device 22 via a dancer roller 21C. be done. Here, the dancer roller 21c is urged toward the lower left in the drawing, and the microcapsule paper 11 is stretched over the exposure table 10. Next, the microcapsule paper 11 that has passed through this pressure developing device 22 is
Feed roller 21d1 separation mechanism 216 and guide roller 2
After being guided to 1f, it is wound onto the winding shaft 23. The unexposed microcapsule paper 1 after leaving the cartridge 15 is maintained in an unexposed state by the light shielding cover 24. The conveying speed of the microcapsule paper 11 is controlled to match the moving speed of the document table glass 2.

Therefore, latent images of predetermined lines of the document 4 are sequentially formed on the microcapsule paper 11 as it passes through the exposure table 10.

Below the pressure developing device 22, a paper feed cassette 31 is detachably attached to the main body of the copying machine, and a suction cup-type paper feed mechanism 32 that sucks paper using negative pressure suction is provided. There is. A color developer paper 33 is stored in the paper feed cassette 31 as a recording paper. The developer paper 33 is taken out one by one by the paper feed mechanism 32, conveyed by a feed roller 34a and a pinch roller 34b, and then transferred to a developer paper roller 34c.
.

After the leading end is aligned by the resist gate 34d and the resist gate 34e, it is carried into the pressure developing device 22.

Through the process described above, the microcapsule paper 11 and the color developer paper 33 are supplied to the pressure development mounting 22 in a state in which they are in close contact with each other and are integrated. In this pressure developing device 22, the microcapsule surface of the microcapsule paper 11 on which the latent image is formed and the developer coated surface of the color developer paper 33 are brought into contact with each other on the inside and are integrated into a pressure roller 22a. It is sandwiched between the backup rollers 22b and pressure is applied. This pressure destroys the unexposed microcapsules and forms a visible image on the color developing paper 33.

After the microcapsule paper 11 and the color developer paper 33 that have come out of the pressure developing device 22 are separated by a separator #Pi21e,
After color development of the developing paper 33 is promoted by the dryer 35a of the heat fixing device 35 and an image is formed, the developing paper 33 is carried out to the paper discharge tray 36 by the heat fixing paper discharge roller 35b. Note that the separated microcapsule paper 11 is wound up on the winding shaft 23 as described above.

Furthermore, the copying machine 1 includes a detection unit 36a for detecting the colors of the original 4 and the color developing paper 33 after image formation.

A color sensor 36 consisting of an original switch 36b and a copy switch 36C is connected to the main body of the copy FA1 via a cable 37. The detection section 36a detects the color of the object to be detected and converts it into an electrical signal, and uses a well-known color discrimination element that is a combination of three primary color filters and a photodiode. Further, when the original switch 36b detects the color of the original 4, the copy switch 36G detects the color of the color developing paper 33 after image formation.
These are operated when detecting the color of each color, and an automatic return contact switch that is turned ON when operated is used.

Next, as shown in FIG. 2, the filter section 6 includes three types of color filters that selectively transmit light depending on its color, namely, a yellow filter 61f, a mapping filter 62f, and a cyan filter 63f. A rack is attached to the side quotient, and the amount of insertion into the optical path can be adjusted by filter drive motors 61m, 62m, and 63m. The filter drive motors 61m to 63m are stepping motors driven by an output signal from a color correction control circuit 70, which will be described later.
1f to 63f are driven in the horizontal direction, and the color filter 61f
The color tone of the reflected light from the original 4 is adjusted by changing the amount of light inserted into the optical path.

Next, the color correction control circuit 70, as shown in FIG.
U71. ROM72. It is configured as a logic operation circuit centered around RAM 73, etc., and has input/output ports via a common bus 74.
It is connected to the door 5 and performs input/output with the outside. The input/output capo door 5 includes a color correction switch 41, a gloss mode changeover switch 42, and a gloss mode changeover switch 42 provided on the operation panel 40 of the copying machine 1. Photo/print changeover switch 431 inputs signals from detection section 36a, original switch 36b, and copy switch 36c provided in color sensor 36, and outputs drive signals to filter drive motors 61m to 63m. In addition, the detection unit 3
The input from 6a is a signal corresponding to the intensity of light of each of the three primary colors.

In the color correction control circuit 70 configured in this manner, color correction control of a copied image is executed according to the flowchart 1- shown in FIG. Note that this control is performed by the color correction switch 41.
It is started by operating .

As shown in Figure 4: When this process starts, first 5
At step 110, it is determined whether or not the original switch 36b is in the ON state, thereby waiting until the original switch 36b is operated.

Here, when the original switch 36b is operated and turned on, the process shifts from 3110 to 3120.

At 3120, the color data sent from the detection unit 36a is read as document color data. Next, at 3130, the state of the gloss mode changeover switch 42 is read, and further, S
After reading the status of the photo/print changeover switch 43 at step 140, the process moves to step 150. 3150, the print mode changeover switch 42, and the photo/printing changeover switch 4.
3, that is, whether or not the original 4 is glossy;
The document color data is corrected depending on whether the document is a photograph or a printed matter.Next, in Sl 60, the copy switch 36c is adjusted by determining whether the copy switch 36c is in the ON state.
Wait until it is operated. Here, copy switch 3
When 6c is operated, 5170 reads the color data sent from the detection unit 36a as copy data, and 51
Move to 80.

At step 5180, the deviation between the original color data corrected at step 5150 and the copy color data is determined, and at step <3190, the filter drive motors 61m to 63 are based on the deviation of each color data.
Calculate the number of driving steps of m. Then, in step 5200, the filter drive motors 61m to 63m are driven by the calculated number of drive steps, and the process ends.

As explained above, in the copying machine 1 of this embodiment,
By sequentially operating the original switch 36b and the copy switch 36G, the color data detected by the detection unit 36a is read as the color data of the original image and the copied image, and the filter drive motor 61m is activated based on the deviation of each color data.
~63m is driven. Therefore, by applying the detection part 36a to the original image and operating the original switch 36b, and then applying the detection part 36a to the copy image of the color developing paper 33 and operating the copy switch 36c, each of the filters 61f to 6
The insertion amount of 3f is automatically adjusted so that the color of the original image and the color of the copied image are the same, and the color correction of the copied image can be quickly performed with a simple operation.

Further, in this embodiment, a gloss mode changeover switch 42 and a photo/print changeover switch 43 are provided, and the color data of the document detected by the detection unit 36a is corrected according to the state of each switch. Color correction can be performed satisfactorily even when the reflected light becomes strong due to the glossiness of the drum 4 or when the document image is formed by the drums 1 to 4.

[Effects of the Invention] As detailed above, the color image forming apparatus of the present invention has a
3. By detecting the color of the original and the recording paper after image formation using a color sensor, the color correction of the light reflected from the original is automatically performed, so anyone can easily perform color correction work for color images. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of the photosensitive pressure-sensitive copying machine of the embodiment, FIG. 2 is an explanatory diagram showing the configuration of the filter section, FIG. 3 is a block diagram showing the configuration of the color correction control circuit, and FIG. 4 is the color correction control circuit. 3 is a flowchart showing color correction control performed by a correction control circuit. 6... Filter section 11... Microcapsule paper 33... Color developer paper 36... Color sensor 36a... Detection section 36b... Original switch 36c... Copy switch 4]... Color correction Switch 42...Gloss mode selector switch 43...Photo/print selector switch 61m62m, 63m...Filter drive motor 61f
, 62f, 63f...color filter 70...color correction control circuit

Claims (1)

[Scope of Claims] Exposure means for irradiating a document with light, guiding reflected light reflected from the document by the irradiation to a photosensitive material, and forming a latent image on the photosensitive material according to the color of the reflected light; An image forming device that forms a color image on recording paper based on the latent image formed on the photosensitive material by the exposure device; A color image forming device that includes: a color sensor that detects the color of the object to be measured; a designation means for selecting and designating an original or a recording paper after image formation as an object to be measured on which the color sensor performs color detection; A color image forming apparatus comprising: a correction means for color correcting the reflected light from the document so that each color is the same.