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Image printing equipment and its controlling method

A technology of image printing and equipment, applied in the direction of program control and printing using stored programs, which can solve problems such as unfavorable high-speed operation, long data processing time, and data loss

Inactive Publication Date: 2005-03-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires a long data processing time, which is not good for high-speed operation
Simply downscaling the data creates data loss issues and reduces print quality

Method used

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  • Image printing equipment and its controlling method
  • Image printing equipment and its controlling method
  • Image printing equipment and its controlling method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0072] [Control Arrangement of Inkjet Printer]

[0073] Fig. 11 is a block diagram showing a control arrangement for executing printing control of the ink jet printer shown in Fig. 10 .

[0074] In FIG. 11, reference numeral 161 denotes an image input unit which reads out a document image optically through a charge-coupled device (CCD) or the like, or from a host computer (not shown) or a A video device or the like (not shown) receives a group of image luminance signals (RGB); 162 represents an operation unit, which has various keys for setting various parameters or issuing an instruction to start printing.

[0075] Reference numeral 163 denotes a CPU which controls the entire ink jet printer according to various programs in the ROM 164, and controls ink discharge. The ROM 164 stores, for example, a program for operating the ink jet printer in accordance with an error processing program in a control program.

[0076] The ROM 164 stores a normal two-pulse drive table, a norma...

no. 2 example

[0181] Next, an image printing control method according to the second embodiment will be described.

[0182] The hardware arrangement of the ink jet printer employing the following image printing control method of the second embodiment is the same as that explained with reference to Figs. 4, 10, 11, 13 and 14 in the first embodiment.

[0183] In the description of the second embodiment, the description about the hardware design arrangement of the ink jet printer will be omitted, and only the image printing control method of the second embodiment installed in the ink jet printer will be described.

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PUM

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Abstract

This invention provides an image printing apparatus in which, when the printhead temperature rises in driving the printhead at a high speed, the ink discharge amount is optimized in accordance with the temperature rise to achieve high-quality, high-efficiency printing. For this purpose, in an image printing system using a time division simultaneous driving method of grouping a predetermined printing elements into a plurality of blocks every predetermined number of printing elements and driving printing elements belonging to the same block at the same driving timing, if the printhead falls within a predetermined temperature range, droplets are discharged using all blocks to print an image. To the contrary, if the printhead reaches the predetermined temperature or higher, blocks to be used are restricted in accordance with the printhead temperature, the total number of droplets is decreased, and the amount of one droplet is increased to print an image. High-quality, high-efficiency printing is realized as a whole.

Description

technical field [0001] The present invention relates to an image printing apparatus and its control method, and a storage medium, and more particularly, to a high-quality, high-efficiency printing method that, in high-speed driving of an inkjet printer, This method is used when increasing the temperature of the print head, or when driving multiple printing elements at the same time. Background technique [0002] In recent years, a variety of image printing apparatuses have been used, and the requirements for these image printing apparatuses are: high-speed printing, high resolution, high image quality, and low noise. [0003] An image printing device that can meet these requirements is an inkjet printer. [0004] Inkjet printers discharge droplets of a printing solution (ink) from ink ejection orifices of a print head, and attach the droplets to a printing medium to print images. Inkjet printers can realize non-contact printing and obtain stable printed images. [0005] M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/00B41J2/05
CPCB41J2/04563B41J2/0458B41J2/04588B41J2/04598B41J2/04543B41J2/00
Inventor 及川真树
Owner CANON KK