JPH0762775B2 - Copying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention provides a color copying machine which obtains a copied image by exposing a reflected light image of an opaque original to a photoconductor and has a copying function of a transmission enlarged projection image of a slide film. And a dual-purpose color copying machine.

[Conventional technology]

A dual-purpose color electrophotographic copying machine will be described with reference to the sectional view shown in FIG.

In FIG. 4, reference numeral 50 is a copying apparatus main body, 101 is a slide projector for enlarging and projecting the slide film 105, and is removable from the copying apparatus main body 50. The slide projector 101 is a halogen lamp with a reflecting mirror 102 and a condenser lens.
A slide film 105 having 103 and 104 and a projection lens 106.
Is for projecting the image of the image on the platen glass 4.
104 is a projection image receiving device, which is a reflection mirror 107 and a Fresnel lens.
108, it is mounted on the original table glass 4 of the copying apparatus main body 50 at the time of copying the enlarged projection image of the slide film, and can be detached from the copying apparatus main body. As shown in the perspective view of FIG. 5, the Fresnel lens 108 is composed of two cylindrical Fresnel lenses whose generatrices are orthogonal to each other. The Fresnel lens 108 is a copying apparatus for diverging the projected light flux transmitted through the projection lens 106 of the slide projector 101. The projection lens 8 of the main body is made to converge within the angle of view.

In the main body 50 of the copying apparatus, 4 is a platen glass, 6 is an illumination lamp, 5 is a first scanning mirror, and 7 is a second scanning mirror. Scan the image. Reference numeral 8 is a lens, 9 is a third mirror, 10 is a color separation filter, 11 is a fourth mirror, and 12 is a dustproof closed glass. Reference numeral 1 denotes an electrophotographic photosensitive drum having an insulating layer on its surface, which is rotatably supported by a shaft 2.

Around the drum 1, an AC corona discharger 14, a primary corona discharger 15, a secondary corona discharger 16, a full exposure lamp 17, a developing device 18, a transfer charger 25, and a cleaning device 31 are arranged in this order. . In addition, the developing device 18 is yellow, magenta,
It is composed of developing devices 181, 182, 183 having cyan toners. Reference numeral 13 is an exposure unit on which a document image is formed on the drum 1 by the above optical system. 33 is a transfer drum having the gripper 24, 26 is a separating claw, 27 is a conveyor belt, 28 and 29 are fixing rollers for fixing, and 30 is a tray for discharging paper. Also, 191,191 'is a cassette, 201,201' is a transfer paper, 211,21
1'is a paper feed roller, 221 is a first register roller, and 23 is a second register roller.

Next, in response to the copy command, the drum 1 starts to rotate about the shaft 2 in the direction of the arrow. When the drum 1 is rotated to a fixed position, the enlarged projection image of the slide film 105 formed on the original platen glass 4 is scanned by the first scanning mirror 5 and the second scanning mirror 7.

At this time, between the Fresnel lens 108 and the platen glass 4, as shown by 109 in the perspective view of FIG. 5, an opaque plate placed on the platen glass so as to surround the periphery of the enlarged projection image of the slide film. A white board frame is provided. The white plate frame 109 is illuminated by an illumination lamp 6 that is integrally formed with the first scanning mirror 5, and has a white border around the copied image of the slide. This edging is to prevent the frame portion or non-image portion of the slide film 105 from being copied and to give a sharp edging to the periphery of the copied image, thereby enhancing the appearance of the copied image.
It should be noted that characters such as title photographed data of the slide film document or patterns of various designs can be provided on the platen glass 4 side of the white plate frame 109 to copy together with the slide film document. Since the first scanning mirror 5 and the second scanning mirror 7 move at a speed ratio of 1: 1/2, the transmission magnified projection image is maintained while the optical path length between the surface of the platen glass 4 and the lens 8 is always kept constant. The scan is performed. The transmitted light image passes through the lens 8 and the third mirror 9, and then the color separation filter 10
Then, the image is separated on the drum 1 by the exposure unit 13 through the fourth mirror 11 and the dustproof closed glass 12. The drum 1 is neutralized by the AC corona discharger 14, and then charged by the primary corona discharger 15 to, for example, a positive polarity.
At 13, the image formed by the slide projector 101 and illuminated by the illumination lamp 6 is slit exposed. At the same time, for example, a negative polarity charge is applied to the secondary corona discharger 16
After that, the whole surface is exposed by the whole surface exposure lamp 17 to form a color separation latent image on the drum 1.

The electrostatic latent image on the photosensitive drum 1 is then visualized as a toner image by the developing device 18. The developing device 18 is a yellow developing device 18.
It is composed of three developing units, a magenta developing unit 182 and a cyan developing unit 183. A developing unit designated corresponding to the color separation filter used for exposure works to obtain a toner image of a required color. .

The transfer paper 201 in the cassette 191 is fed into the machine by the paper feed roller 211, the first register roller 221 takes a rough timing, then the second register roller 23 takes an accurate timing, and the leading edge of the paper is transferred. It is gripped by the gripper 24 of the transfer drum 33. As the transfer drum 33 rotates, the drum 33
Transfer charger 25 and photosensitive drum 1 are transported while being wound around
While the transfer paper 201 passes through the space, the toner image on the photosensitive drum 1 is transferred onto the transfer paper. The transfer drum 33 rotates by the required number of rotations while holding the front end of the transfer paper 201 by the gripper 24, and the image of the required number of colors is transferred by scanning the document image the required number of times.

After the transfer is completed, the transfer paper is released from the gripper 24 and
It is guided to the conveyor belt 27 by 26, and the fixing roller pair 28,2
It is guided to 9 and fixed by pressing and heating, then tray 30
And a color copy image is obtained. The surface of the photosensitive drum 1 after transfer is cleaned by a cleaning device 31 composed of an elastic blade, and the process proceeds to the next cycle.

When copying an ordinary opaque reflective original, the projection image receiving device 140 is removed from the main body 50 of the copying machine, and an opaque original (not shown) is placed on the original table garum 4. After the copy command, the photosensitive drum 1 rotates about the axis 2 as a rotation center, and at some point, the first mirror 5 and the second mirror 7 move together with the illumination lamp 6 in the direction of the arrow in the figure, and the document illuminated by the illumination lamp 6 is moved. Scan the image. Thereafter, the same cycle as the above-described copying cycle of the transmission magnified projection image is performed to obtain a color copied image from an opaque original.

[Problems to be solved by the invention]

The above-mentioned dual-purpose color copying machine has the following problems.

The color temperature of the halogen lamp, which is the illumination lamp of the slide projector, is usually 3200 to improve the color rendering and to obtain high brightness.
Use a high one from ° K to 3500 ° K. On the other hand, the halogen lamp, which is an illumination lamp on the main body of the color copying apparatus, usually has a relatively low color temperature of 2800 ° K to 3000 ° K in order to obtain a long life.

Therefore, in a dual-purpose color copying machine, it is necessary to correct the color temperature of both halogen lamps. Conventionally, a color temperature conversion filter was installed in front of the projection lens of the slide projector,
The color temperature of the projection light was adjusted to the color temperature of the halogen lamp on the main body side. However, even if a color temperature conversion filter is used, it is very difficult to optimize the color balance of both the copy image of the reflection original and the copy image of the slide film. This is blue even if the color temperature conversion filter is used.
This is because the exposure amount for separating each color of green and red cannot be made exactly the same as when copying a reflection original. In addition to the problem of the type and characteristics of the color temperature conversion filter, the spectral reflection of the reflection original paper or ink There is also the problem of the difference between the reflectance and the spectral reflectance of the slide film base film and dye.

Furthermore, the reflection original is usually an appropriate image, and it is sufficient to faithfully reproduce the color of the reflection original. However, the color slide of the original itself may be out of color balance in the case of a color slide. There is a problem that must be optimized. As a similar problem, the color slide original has a problem that the brightness is adjusted in the copied image because the whole is dark or the whole is too bright even if the color balance is correct.

In order to deal with the above-mentioned problems, it was problematic to adjust the aperture of the lens, the exposure slit width, or the ND filter density in the optical path on the copying machine main body side for each color separation exposure when copying a color slide.

That is, as described above, when copying a color slide, the white plate frame is illuminated by the document illumination lamp on the main body side, and a white border (white frame) is provided around the copy image. When the amount is adjusted, the white frame may be fogged depending on the exposure amount.

On the other hand, when copying a slide film, it is necessary to adjust the exposure amount for each color separation of the document illumination lamp on the main body side to the minimum exposure amount that does not cause fogging in the white frame of the copied image. This is because if the exposure amount is too large, the scattered light from the Fresnel lens on the platen glass becomes a non-negligible amount, which affects the image exposure as flare light and reduces the sharpness of the copied image.

In the past, when copying the slide film, the blinking control of the illumination lamp of the slide projector was manually performed.However, if the illumination lamp of the slide projector was turned on when the rotation of the photosensitive drum was stopped, the light was turned on to the photosensitive drum. A memory was generated, and a ghost image was easily generated in a copied image. Further, lighting other than during image exposure is not preferable because it raises the temperature of the platen.

The present invention solves the above-mentioned problems, and is designed to obtain the best copy image when a composite copy image of a transparent original and a reflective original is obtained. Further, the blinking control of the illumination light source of the color slide is optimized to obtain a good copy image without a ghost image.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a document placing transparent plate, a first light source that illuminates a transparent document, and a second light source that illuminates a reflecting document placed on the document placing transparent plate. And a document scanning unit that supports the second light source and moves in parallel with the document mounting transparent plate to scan the image light from the document mounting transparent plate side, and is illuminated by the first light source. In a copying apparatus capable of copying with the image light from the original, copying with the image light from the reflective original illuminated by the second light source, and composite copying with the image light from both the transparent original and the reflective original, When forming a composite image from both the original and the reflection original,
The first light source and the second light source are controlled to blink at substantially the same timing, and the first light source is turned on to illuminate the transparent plate with the image light from the transparent original. The image light is scanned while the second light source is turned on.

〔Example〕

The electrical control applied to the dual-purpose color copying machine of the present invention will be described with reference to the block diagram of FIG.

The configuration of the dual-purpose color copying apparatus of the present invention will be described with reference to the fourth illustrated apparatus. In the figure, 201 is a main body control CPU, 202 is a CPU control ROM, 203 is a CPU control RAM,
204 is an I / O for the controller of the slide projector 101, 205 is a D / A converter for converting the data from the I / O 204 for the projector controller into analog, and 103 is the D / A mentioned above.
A projector CVR that supplies a voltage controlled by an analog signal from the converter 205 to the halogen lamp 102, 204a is a control line for lighting the projector CVR, and 204b is a power source for the slide projector 101. Detecting line for detecting whether it is connected or connected, 206 is the I / O for CVR control of the device main body 50
O, 207 is a D / A converter for converting data to analog, 208 is a CVR for the device body to supply a predetermined voltage according to the D / A converted data to the halogen lamp 6, 209 is a sequence control for the device body 50 I / O, O-1 to On for each output group I-1 to In
Indicates each input group. 210 is an I / O for controlling each color control input of the halogen lamp operating voltage of the projector,
211 is an A / D converter that changes each color control input of the halogen lamp lighting voltage of the projector, 212 to 214 are analog switches that switch each color input data, R215 to R217 are variable resistors that input analog data, and 220 is the above projection CVR control input means for machine,
Reference numeral 221 denotes a CVR control input means for the apparatus body having the same configuration as 220.

SW1 in FIG. 1 is for manually turning on and off the halogen lamp of the projector. This is a white plate or a Fresnel lens on which the projected light image of the color slide, which is a transparent original, is placed between the platen glass and the Fresnel lens. It is provided to adjust the focus by projecting it on the white plate placed above.

Next, FIG. 2 shows a control sequence of the block diagram of FIG. In the figure, 301 is each input I / O SUB routine, the details of which are shown in FIG. Reference numeral 301-a in FIG. 3 performs read processing of each I / O. In 301-b, check whether the projector is connected. If it is not connected, it returns to the main routine, and if it is connected, it reads the projector data and processes it. Here, the reading process is performed by the control I / O2 in the projector CVR control input means 220 of FIG.
If the output O-Y212 for Y is output from 10 by color designation, the variable volume RY215 for Y is connected and the desired data is
I / O210 for digital conversion with the / D converter 211 and control
Read from the CPU 201, performs a predetermined process, and stores the data in the RAM 203. Similarly, the data is read in the order of M and C in sequence.

Next, at 301-d, the process of setting the projector connection flag is performed, and the process returns to the main routine.

Next, in FIG. 2, it is judged whether the copy is ON or not ((Flow 30
2) If the answer is NO, the routine returns to the input routine 301 to enter the standby state. If YES, 303 determines how many times the color sequence has been performed. Although not shown, this is determined by the color mode designated by the operation unit. For example, in the case of three full-color colors, it is determined whether or not the sequence has been performed three times. In 304, the color mode flag is set according to the order of the designated color mode, and the operation related to the unique color information is performed. For example, the preprocessing for initializing the photosensitive member such as pre-exposure is performed prior to the copy sequence in 305 such as switching of color filters. If the projector connection flag is checked at 306 and it is connected, the projector CVR control data is output from the RAM 203, which points to the data area for color specification, to the projector control I / O 204, and the digital data 205 is converted to an analog signal. Then, it outputs to the input terminal of the projector CVR103. This will set the voltage of the predetermined color mode,
In response to a command from the CPU 201, the CVR 103 is operated by the command line 204-a to turn on the halogen lamp 102. If not connected in the determination sequence of 306, the sequence 307 is skipped. Reference numeral 308 controls the main body CVR and high-voltage control where the main body control sequence is performed.

At 309, the post-copy processing such as post-exposure of the photoconductor is performed, at 310, the operation of the CVR for the main body and the projector is stopped, and after returning to the 303 sequence and performing a desired number of times, the sequence 301 is performed. Return.

Thus, in this embodiment, the halogen lamp 103 of the projector is used.
The blinking control of is set at substantially the same timing as the halogen lamp 6 of the apparatus body.

As a result, in this embodiment, a composite image of the slide film and the reflection original can be formed.

In addition, at this time, when the halogen lamp of the main body of the device has finished scanning and goes out, the halogen lamp of the projector also goes out,
It is possible to prevent a ghost from being generated in a copied image without causing a problem that extra light is input from the projector to the stopped photosensitive drum and an optical memory is generated in a part of the photosensitive drum.

[Effects of the Invention] As described above, according to the present invention, it is possible to form a good composite image of a transparent original and a reflective original without a ghost. Further, in both the case of combining a transparent original with a reflective original or the case of combining a reflective original with a transparent original, the blinking timing of the first or second light source is adjusted according to the position of the smaller original. Since it is not necessary to control, there is an effect that blinking control of the light source becomes very easy.

[Brief description of drawings]

FIG. 1 is an electric control block diagram of the dual-purpose color copying apparatus of the present invention, FIG. 2 is a control sequence diagram of the electric control block diagram of FIG. 1, and FIG. 3 is a subroutine diagram of the control sequence diagram of FIG. FIG. 4 is an explanatory view of a conventional combined type color copying apparatus to which the electric control of the present invention can be applied, and FIG. 5 is a perspective view of a Fresnel lens and a white frame used in the combined type color copying apparatus of FIG. In the figure, 6 is a document light source, 101 is a slide projection device, and 108.
Is an image receiving device for receiving the projection device, and 50 is a color copying device.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-57-100453 (JP, A) JP-A-60-252335 (JP, A) JP-A-60-32071 (JP, A) JP-A-52-1 121330 (JP, A) JP 59-137941 (JP, A) JP 58-86569 (JP, A) JP 56-117268 (JP, A) JP 58-78778 (JP, A) JP 60-51874 (JP, A) JP 60-28353 (JP, B2)

Claims (1)

[Claims] 1. An original placing transparent plate, a first light source for illuminating a transparent original, a second light source for illuminating a reflective original placed on the original placing transparent plate, and a second light source supported. And a document scanning unit that moves in parallel with the document mounting transparent plate and scans the image light from the document mounting transparent plate side, and makes a copy by the image light from the transparent document illuminated by the first light source. In a copying apparatus capable of copying with image light from a reflective original illuminated by the second light source and composite copying with image light from both a transparent original and a reflective original, both a transparent original and a reflective original are used. When forming a composite image,
The first light source and the second light source are controlled to blink at substantially the same timing, and the first light source is turned on to illuminate the transparent plate with the image light from the transparent original. A copying apparatus characterized in that image light is scanned while the second light source is turned on.