JPH0189147U

JPH0189147U -

Info

Publication number: JPH0189147U
Application number: JP18495287U
Authority: JP
Priority date: 1987-12-04
Filing date: 1987-12-04
Publication date: 1989-06-13

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す発熱体通電時間
制御回路の構成ブロツク図、第２図は従来のサー
マルヘツドの回路図、第３図及び第４図は発熱体
通電時間と発色半径の関係を示す図、第５図は１
個の発熱体の温度の時間変化を示す図、第６図及
び第７図は連続駆動の発熱体温度の時間変化を示
す図、第８図は第１図の延長制御部の構成ブロツ
ク図、第９図は第１図の回路を有するフアクシミ
リ装置の概略構成ブロツク図、第１０図は第９図
のメモリ２１の構成図、第１１図は第９図のメモ
リ２２の構成図、第１２図は第９図の信号波形図
、第１３図は第９図の比較部の動作を示すフロー
チヤートである。１０……サーマルヘツド、１２……カウント部
、１３，１５……信号発生部、１４……延長制御
部、１６……ＯＲゲート、２１，２３……メモリ
、２２……比較部。 Figure 1 is a configuration block diagram of a heating element energization time control circuit showing an embodiment of the present invention, Figure 2 is a circuit diagram of a conventional thermal head, and Figures 3 and 4 show the heating element energization time and coloring radius. A diagram showing the relationship, Figure 5 is 1
Figures 6 and 7 are diagrams showing the temperature changes over time of each heating element, Figure 8 is a block diagram showing the extension control section of Figure 1, 9 is a schematic configuration block diagram of a facsimile device having the circuit shown in FIG. 1, FIG. 10 is a configuration diagram of the memory 21 in FIG. 9, FIG. 11 is a configuration diagram of the memory 22 in FIG. 9, and FIG. is a signal waveform diagram in FIG. 9, and FIG. 13 is a flowchart showing the operation of the comparing section in FIG. DESCRIPTION OF SYMBOLS 10... Thermal head, 12... Count section, 13, 15... Signal generation section, 14... Extension control section, 16... OR gate, 21, 23... Memory, 22... Comparison section.

Claims

[Claims for Utility Model Registration] 1. In a heating element energization time control circuit that controls the energization time of a plurality of heating elements provided in a thermal head, the energization time length of the heating elements is determined based on a control signal and the energization time length of the heating elements is determined according to the control signal. A signal generating means for generating an energization time length signal, a printing cycle measuring means for measuring a printing cycle for printing a line based on a control signal, and a time threshold value for comparison with the printing cycle measurement result by this printing cycle measuring means. a time threshold storage means for storing a time threshold; a comparison means for comparing the magnitude of the printing cycle measurement result with the time threshold; and an extension time control means for determining an extension time of the energization time in the heating element based on the comparison result by the comparison means. A heating element energization time control circuit comprising: and energization time extension means for extending the energization time of the heating element by the extension time determined by the extension time control means. 2. The time threshold storage means and the extension time control means are constituted by a memory, and the energization time extension means generates an extension according to the extension time determined by the extension time control means in synchronization with the energization time length signal. The heating element energization time control circuit according to claim 1, which is comprised of a signal generating section that generates a signal, and an OR gate that takes the logical sum of the energization time length signal and the extension signal.