PRINTING DEVICE AND PRINTING METHOD

Title:

PRINTING DEVICE AND PRINTING METHOD

Document Type and Number:

WIPO Patent Application WO/2006/033302

Kind Code:

A1

Abstract:

There is provided a printing device using a thermal head having heating elements in the line state in the direction vertical to the feed direction of a printing medium as a printing head. According to the both ends of the line of image data to be printed or pixel data in the vicinity, accumulation data on the thermal head (108) of each line is calculated based on the accumulation data on the preceding line. The accumulation data on each line is compared to a predetermined value. When any of the accumulation data is greater than the predetermined value, energy of the heating element (113) is lowered and the image data is printed on the printing medium (104) with the lowered energy of the heating element (113). Thus, even when a high-speed printing is performed, it is possible to prevent generation of a high-temperature portion at the both ends of the thermal head causing concentration irregularities in the printed image.

Inventors:

TAKANO HIROAKI (JP)
TAKIZAWA NAOKI (JP)

Application Number:

PCT/JP2005/017159

Publication Date:

March 30, 2006

Filing Date:

September 16, 2005

Export Citation:

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Assignee:

SONY CORP (JP)
TAKANO HIROAKI (JP)
TAKIZAWA NAOKI (JP)

International Classes:

B41J2/36; B41J2/355

Foreign References:

JPS63209958A	1988-08-31
JPS6347168A	1988-02-27
JPH11179893A	1999-07-06
JP2004136608A	2004-05-13
JP2003266751A	2003-09-24
JP2000071505A	2000-03-07
JPH058808A	1993-01-19
EP0110675A2	1984-06-13

Other References: