JPS6294043U

JPS6294043U -

Info

Publication number: JPS6294043U
Application number: JP18573385U
Authority: JP
Priority date: 1985-12-02
Filing date: 1985-12-02
Publication date: 1987-06-16

Description

[Brief explanation of the drawing]

第１図はこの考案に係る熱転写プリンタの要部
を概略的に示す回路図、第２図は第１図の動作を
説明するためのタイムチート、第３図は熱転写プ
リンタのサーマルヘツドの一例を示す平面図、第
４図は熱転写プリンタの記録部の動作を説明する
ための要部の断面図、第５図および第６図は印字
パターンの一例を示す平面図である。３……ドライバ回路、５……発熱抵抗体列、６
……発熱抵抗素子、１０……サーマルヘツド、１
１……インクリボン、１３……ソリツドインク層
、１４……記録紙、１６……溶融部、２０……印
字濃度制御回路、２１……単安定マルチバイブレ
ータ、２２……電源切換回路、ＶＨ……高い電源
電圧、ＶＬ……低い電源電圧。なお、図中、同一
符号は同一もしくは相当部分を示す。 Fig. 1 is a circuit diagram schematically showing the main parts of the thermal transfer printer according to this invention, Fig. 2 is a time cheat for explaining the operation of Fig. 1, and Fig. 3 is an example of the thermal head of the thermal transfer printer. FIG. 4 is a sectional view of a main part for explaining the operation of the recording section of the thermal transfer printer, and FIGS. 5 and 6 are plan views showing examples of printing patterns. 3...Driver circuit, 5...Heating resistor array, 6
...Heating resistance element, 10...Thermal head, 1
DESCRIPTION OF SYMBOLS 1... Ink ribbon, 13... Solid ink layer, 14... Recording paper, 16... Melting part, 20... Print density control circuit, 21... Monostable multivibrator, 22... Power switching circuit, VH... High power supply voltage, VL...low power supply voltage. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of Claim for Utility Model Registration] (1) A thermal head equipped with a heat generating resistor array that is driven by external print data via a driver circuit is set to be movable along recording paper, and the heat generating resistor element In a thermal transfer printer that melts the solid ink layer of the ink ribbon interposed between the ink ribbon and the recording paper by applying electric current and heating, and transfers this melted portion to the recording paper, the initial application of electric current applied to the heating resistor array A thermal transfer printer characterized by comprising a print density control circuit that increases a voltage higher than an applied voltage during energization. (2) The print density control circuit consists of a monostable multivibrator that outputs a pulse signal in response to a print start signal,
A thermal transfer printer according to claim 1, comprising a power supply switching circuit that generates a voltage in the driver circuit higher than the voltage applied during energization using a pulse signal from the monostable multivibrator.