JPH0286468A - Image output control method - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application) The present invention relates to an image output control device, and particularly to an image output control method for outputting a mixed color image in a multicolor printer.

[Conventional technology]

Conventionally, when forming a color image in this type of printer device, for example, a laser beam printer, electrostatic alternating images are sequentially or multiple-formed on a photoconductor according to image data of each color, thereby forming yellow, magenta, cyan, etc. Generally, a color image is formed on a conveyed recording paper by so-called subtractive color mixing, which is developed with a color developer such as .

[Problem to be solved by the invention]

However, each developer used for development, that is, the color component toner, has different characteristics for each color, so each bias (development bias, etc.) in the image forming process for each color (based on a known electrophotographic method) is finely adjusted. different.

For this reason, even if a color image is formed using color developers that are sequentially transferred, there are problems such as the correct color mixture cannot be reproduced on recording paper.

This invention was made to solve the above problems, and aims to provide an image output control method that can reproduce a correct mixed color image by transferring different developers to both sides of a transparent film being transported. shall be.

(Means for Solving the Problems) The image output control system according to the present invention includes a reversal process of reversing a transparent film being conveyed, and a recording medium applied to each side of the transparent film by each developing means in parallel with this reversal process. This method consists of a transfer process in which a monochrome developed image is sequentially transferred in monochrome.

[Function] In the present invention, the monochromatic developed image developed on the recording medium by each developing means is sequentially monochrome-transferred onto each side of the transparent film which is conveyed while being sequentially reversed.

〔Example〕

FIG. 1 is a perspective view illustrating an image output control system according to an embodiment of the present invention. Reference numeral 1.2 denotes a photosensitive drum serving as a recording medium, which is rotated in the direction of the arrow by a driving means (not shown). Reference numeral 3 denotes a transparent film, on which the monochrome image formed on the photosensitive drum 2 is sequentially transferred and outputted on a different image surface from the monochrome image surface transferred by the photosensitive drum 1 in the order shown by the arrows in the figure. Note that a reversing mechanism is constituted by the photosensitive drum 1.2, a charger, a static eliminator, etc. (not shown), and after the image transfer to the photosensitive drum 1 is completed, the conveyance of the transparent film 3 is controlled so that the transfer surface becomes the back surface. .

Reference numeral 4 denotes an exposure element composed of, for example, a semiconductor laser, which modulates on/off based on blue development color data output from a host (not shown), and horizontally scans the photosensitive drum 1 to develop an electrostatic image into a blue image. Form a latent image. Note that the electrostatic latent image formed on the photosensitive drum 1 is transferred to a developing device (not shown).
(consisting of a toner hopper and a developing roller) with a blue developer, and the developed blue developer is transferred onto one side of the transparent film 3. Reference numeral 5 denotes an exposure element composed of, for example, a semiconductor laser, which modulates on/off based on red development color data output from a host (not shown), and horizontally scans the photosensitive drum 1 to develop an electrostatic image into a red image. Form a latent image.

The electrostatic latent image formed on the photosensitive drum 1 is developed with a red developer by a developing device (not shown) (consisting of a toner hopper and a developing roller), and the developed red developer is applied to one side of the transparent film 3. transcribed.

Next, the operation will be explained. Note that the image data is input from a host (not shown) and is loaded into the image memory by color.

When the image forming sequence is started, the exposure element 4 is activated based on, for example, blue image data captured in the image memory.
horizontally scans the photosensitive drum 1 while being modulated on/off to form an electrostatic latent image.

Next, the electrostatic latent image formed on the photosensitive drum 1 is developed by a developing device (not shown), and is transferred onto the surface of the transparent film 3 fed from a paper feeding section (not shown) of the printer device. Next, the red developer developed on the photosensitive drum 2 is transferred to the back side of the transparent film 3 that is being conveyed while being reversed by the same process as described above, and a single color developer is transferred to each side of the transparent film 3. are transferred in a single color to form a color image by subtractive color mixing.

Thereby, the developers are directly transferred without coming into direct contact with each other, and a monochrome image can be output onto the transparent film 3 while maintaining the color development unique to each developer.

FIG. 2 is a block diagram illustrating drive control of the exposure elements 4 and 5 shown in FIG. Part] 3 and shared bus 1
5. Controls the device I10 connected to 5. Reference numeral 12 denotes an image memory that stores image data (blue image data DATAB, red image data DATA) output from a host (not shown).
A color frame memory 12a that stores each color frame R) individually.
, 12b. The printer control unit 13 is composed of a local MPU 13a, a front/back discrimination separation mechanism 13b, etc., and the front/back discrimination separation mechanism 13b receives blue image data DATAB, which is input via the shared bus 15 based on a control command from the local MPU 13a. Red image data DATA
Both front and back sides of R are output to the printer 14.

Next, the front and back image output control operation according to the present invention will be explained with reference to the flowchart shown in FIG.

FIG. 3 is a flowchart illustrating the front and back image output control procedure according to the present invention. Note that (1) to (!O) indicate each step.

Image output start signal from MPU 11 is sent to local MPU 13
1) When the image output start signal is output to the local MPU 13a, the local MPU
13a determines whether or not the blue image data DATAB input via the shared bus 15 is designated as a front surface image (2). If YES, the front/back discrimination separation mechanism 13b separates the photosensitive drum 1 based on the blue image data DATAB. To generate blue image information VDOB to be exposed 3), blue image information V
Output the DOB to the printer (4).

Next, the blue image is transferred and outputted on the surface of the transparent film 3 that is fed based on the blue image information VDOB 5), and the process waits for the inversion state of the transparent film 3 to become OK 8).
If OK, the red image developed on the photosensitive drum 2 is transferred and output on the back side of the transparent film 3 (7). Then,
Please judge whether the image data is finished or not 8) YE
If S, the process ends; if No, the process returns to step (2).

On the other hand, if the judgment in step (2) is NO, the front/back discrimination separation mechanism 13b generates red image information VDOR for exposing the photosensitive drum 1 based on the red image data DATAH9), and sends the red image information VDOR to the printer. The cut portion is output (10).

(Effects of the Invention) As explained above, the present invention includes a reversing process for reversing a transparent film being conveyed, and a single color developed onto a recording medium by each developing means on each side of the transparent film in parallel with this reversing process. Since a transfer process is performed to sequentially transfer a developed image in a single color, a single color developer can be transferred to both sides of the transparent film without impairing the characteristics of the developer prepared for each color. Therefore, an excellent effect is achieved in which a color image based on subtractive color mixture with a balanced hue can be reproduced with high quality.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating an image output control system showing an embodiment of the present invention, FIG. 2 is a block diagram illustrating drive control of the exposure element shown in FIG. 1, and FIG. 2 is a flowchart illustrating a front and back image output control procedure according to the present invention. In the figure, 1.2 is a photosensitive drum, 3 is a transparent film, 4.5
is an exposure element. Figure 1 Figure 2

Claims (1)

[Claims] In an image output means having a plurality of developing means containing a monochromatic developer that develops an image formed on a recording medium in different colors according to input image data, a reversing process is performed to reverse the transparent film being conveyed; An image output control method characterized in that, in parallel with the reversal process, a transfer process is performed to sequentially transfer monochrome developed images developed onto a recording medium by the respective developing means onto each side of the transparent film.