Unlock instant, AI-driven research and patent intelligence for your innovation.

Image forming apparatus and image forming method

An imaging device and image technology, applied in electrography, optics, instruments, etc., can solve problems such as difficult combination

Inactive Publication Date: 2009-08-19
RICOH KK
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, when it comes to choosing dither groups, it is difficult to try all of them as there are tens of thousands of combinations

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Image forming apparatus and image forming method
  • Image forming apparatus and image forming method
  • Image forming apparatus and image forming method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0053] Figure 4is a diagram showing the structure of a full-color image forming apparatus in the full-color image forming apparatus in Example 1. The full-color image forming apparatus in Example 1 is used to form an image by superimposing color component images of four colors, yellow (Y), cyan (C), magenta (M) and black (K), on a recording sheet. In Example 1, four imaging units 24 corresponding to each of the CMYK color components, such as Figure 4 Arranged as shown. The toner images of the color components formed on each of the image forming units 24 are successively transferred onto a belt-shaped intermediate transfer body (intermediate transfer belt) 29 arranged adjacent to the four image forming units. The intermediate transfer body 29 is rotated at a predetermined timing by a driving unit not shown in the figure, so that the toner image corresponding to each color component is superimposed on the intermediate transfer body 29 at a predetermined position. superior. ...

example 2

[0077] The structure of Example 2 is mostly the same as in Example 1. The same full-color imaging device, laser optical unit, optical unit (optical device) as in Example 1 were used. Although most of the image processing apparatus is the same as in Example 1, the dither matrix used in the dither processing as pseudo halftone processing is different from that in Example 1. Therefore, the periodic structure of the image data for output is dithered differently from Example 1.

[0078] The dithering processing in Example 2 is described below. Table 2 below shows combinations of dither matrices for CMYK colors in Example 2 when the main vectors and sub-vectors are used in the same manner as in Example 1.

[0079] Table 2

[0080] serial number

Number of threads

angle

a0x

a0y

a1x

a1y

Y

200.0

0.0

3

0

0

-3

C

180.3

146.3

-3

2

3

2

M

180.3

...

example 3

[0138] Figure 9 is a diagram showing the structure of the laser optical unit in Example 3. In Example 3, such as Figure 9 Two polygonal scanners (7YC and 7MK) are shown used.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Disclosed is an image forming apparatus for recording images, including: an image processing unit that generates toner image data on four colors of yellow (Y), cyan (C), magenta (M) and black (K), causing the toner image to have a linear periodic structure; and an image forming unit that forms a toner image using coloring materials of four colors and superimposes the toner image on a recording medium, wherein the toner images of the four colors The line-type periodic structure of the agent image is determined as follows: Based on the screening rulings for Y, C, M, and K colors as 200.0, 180.3, 180.3, and 200.0, The mesh angles are 0.0, 146.3, 33.7 and 90.0.

Description

technical field [0001] The present invention relates generally to electrostatic color imaging devices and imaging methods, and more particularly to techniques suitable for use in color lithography systems and imaging devices using laser recording / silver halide imaging techniques. Background technique [0002] Image data to be input into an imaging device has multivalued data of 8-12 bits per pixel in a hierarchical image such as a photograph. In contrast, imaging devices, including electrostatic imaging devices, used to form images on paper (ie, hard copy) actually have very few gradations that can be represented per pixel. In order to solve this problem, the hard copy device increases its resolution to, for example, 600dpi or 1200dpi, and displays a pseudo-halftone image by modulating the image density according to the area using multiple pixels. Pseudo-halftone processing refers to image processing performed in the step of converting input image data into a pseudo-halfton...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/01G03G15/00G03G13/01G03G13/00
Inventor 安富启
Owner RICOH KK