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Thermal printer

一种热敏打印机、热敏打印头的技术，应用在打印装置、印刷等方向，能够解决间隙等问题，达到减低浓度不均的效果

Inactive Publication Date: 2009-05-20
CITIZEN WATCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] Therefore, even if the energization time to the print head is changed according to the printing speed, since the printing paper is temporarily stopped during low-speed rotation, not only the energization time at the stop position changes, but also the problem of gaps between dots remains. not eliminated

Method used

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Examples

Experimental program
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Embodiment Construction

[0071] The thermal printer of the present invention will be described in detail below using the accompanying drawings. Additionally, the following uses Figure 1-9 Illustrate through the example of 1-2 phase excitation, using Figures 11-16 An example of driving by microstepping is explained. also, Figure 10 Describe the schematic structure of the thermal printer of the present invention, Figure 17 It is a schematic functional diagram when combining 1-2 phase excitation and microstep drive.

[0072] First, an example of controlling a motor using 1-2 phase excitation will be described. figure 1 It is a figure for explaining the general function of the thermal printer of this invention, and is a figure explaining the example by 1-2 phase excitation.

[0073] The thermal printer 1 has a thermal head 16 formed by arranging a plurality of heating elements (not shown) in a row.

[0074]The control unit 20 selectively drives a heating element to be driven from among the plur...

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PUM

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Abstract

When a thermal printer head is printed in divided blocks, the number of dots to be printed on one line is changed between the high-speed printing case, in which the division number of the divided blocks is small, and the low-speed printing case, in which the division number of the divided blocks is large. In case the division number of the divided blocks is so large that the print is slow, the paper feed in one line is performed in a plurality of pitches to prevent the state, in which the paper stops in one line, and the individual pitches are powered to increase the number of dots to be printed in one line, so that no clearance may be established between the dots and between the lines. In the pitches of one line, the ratio of the power feed to each pitch is changed to reduce the difference in the density between the individual pitches of one line. When the thermal printer head is printed in the divided blocks, the print can be made without any clearance between dots, even in case the division number of the divided blocks is so large that the print is slow.

Description

technical field [0001] The invention relates to thermal printers, in particular to the power control of thermal print heads. Background technique [0002] A thermal printer is a device that performs printing operations by driving multiple heating elements that form a thermal print head in a row, and time-sharing drives the maximum number of dots that can be driven simultaneously in all heating elements arranged in a row. [0003] This is because when all the heating elements in one row are driven at the same time, the power consumption increases and the voltage applied to each heating element decreases. When the voltage applied to the heating elements decreases, the printing density decreases and the printing becomes blurred. [0004] Therefore, the maximum number of dots that can be driven at the same time is set, and the heating elements arranged in a row are dividedly driven by taking the heating element of the set maximum number of dots as a unit. For example, in a ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/36B41J2/355B41J11/42
CPCB41J2/36
Inventor 水户贤司
Owner CITIZEN WATCH CO LTD