Color image forming apparatus and image forming method

A color imaging, pixel technology, applied in permanent visual display devices, image communication, electrical recording and other directions, can solve the problem of doubling the cost of memory

Inactive Publication Date: 2007-03-21
KK TOSHIBA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The necessary capacity of the delay memory is also quadrupled, and the cost of the memory will double

Method used

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  • Color image forming apparatus and image forming method
  • Color image forming apparatus and image forming method
  • Color image forming apparatus and image forming method

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Experimental program
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Embodiment Construction

[0020] Embodiments of the present invention will be described below with reference to the drawings.

[0021] FIG. 1 schematically shows the structure of a color digital multifunctional peripheral (MFP) of a color image forming apparatus according to the present invention.

[0022] The color MFP 1 includes: a CPU 10 for performing overall control including control of a RIP (raster imageprocessing raster image) processing section; a scanner 11; a page memory 12; an image processing section 13; laser emitting sections 14Y, 14M, 14C, and 14K ; photoconductor drums 15Y, 15M, 15C, and 15K; developing devices 16Y, 16M, 16C, and 16K; a conveyor belt 17 ; and a LAN (Local Area Network) interface (I / F) 18 .

[0023] As described in detail below, the page memory 12 includes a pixel compression processing section 40 .

[0024] The image processing section 13 includes: a scan data image processing unit 30; a print data image processing unit 31; delay memories 32, 33, and 34; pixel divisio...

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Abstract

If a CPU is informed that ''1200x1200 dpi'' is selected from an input unit, the CPU switches a normal 8-bit RIP process with 600x600 dpi to a 1-bit RIP process with 1200x1200 dpi. Image data, which has become 1-bit data with 1200 dpi, is stored in a page memory. A pixel packing process unit executes (2x2) packing when the image data stored in the page memory is to be output from the page memory. The packed Y color image data is restored, without delay, to a normal pixel unit in a pixel division unit. The packed M color image data is restored, with a delay in a delay memory, to a normal pixel unit in the pixel division unit. The packed C color image data is restored, with a delay in the delay memory, to a normal pixel unit in the pixel division unit. The packed K color image data is restored, with a delay in the delay memory, to a normal pixel unit in the pixel division unit.

Description

technical field [0001] The present invention relates to a color imaging device having a function of delaying output of image data according to colors one by one, and an imaging method. Background technique [0002] In a 4-stage tandem type color digital multifunction peripheral (MFP), in the case of performing development in the order of yellow (Y) → magenta (M) → cyan (C) → black (K), relative to the The Y color image data of the first developed color must output the M / C / K color image data with a delay corresponding to the distance between drums. In this case, by temporarily storing M / C / K color image data among in-phase (in-phase) Y / M / C / K image data in a memory for delay ("delay memory"), each delay is delayed. Color image data. [0003] For example, when the distance between the drums for each color is 80 mm, the resolution of image data is 600 dpi and the amount of image data per pixel is 8 bits, it is necessary to: Data, with respect to the image data of Y color as th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/01H04N1/04H04N1/21
CPCG06K15/129G06K15/1861H04N1/40068
Inventor 佐土原哲也
Owner KK TOSHIBA
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