HEAD DRIVE CIRCUIT AND PRINTING DEVICE

PROBLEM TO BE SOLVED: To suppress rounding of a waveform of a drive signal that is output to a print head while suppressing an increase in cost.SOLUTION: A head drive circuit 106 includes: an amplifier 203 for outputting a drive signal to an inkjet head 21a; and a damping circuit 201 having a resist...

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Bibliographic Details
Main Author HIRAMATSU KAZUNORI
Format Patent
LanguageEnglish
Japanese
Published 15.11.2018
Subjects
CORRECTION OF TYPOGRAPHICAL ERRORS
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:PROBLEM TO BE SOLVED: To suppress rounding of a waveform of a drive signal that is output to a print head while suppressing an increase in cost.SOLUTION: A head drive circuit 106 includes: an amplifier 203 for outputting a drive signal to an inkjet head 21a; and a damping circuit 201 having a resister R1 disposed between the amplifier 203 and the inkjet head 21a and a field effect transistor Q1 connected to the resister R1 in parallel. The field effect transistor Q1 executes on-off operation in accordance with a voltage of the drive signal and varies a value of resistance of a damping resister.SELECTED DRAWING: Figure 8 【課題】コストアップを抑制しつつ、印刷ヘッドに出力する駆動信号の波形のなまりを抑制できるようにすることを目的とする。【解決手段】ヘッド駆動回路１０６は、駆動信号をインクジェットヘッド２１ａに出力するアンプ２０３と、アンプ２０３とインクジェットヘッド２１ａとの間に配置される抵抗Ｒ１、及び、抵抗Ｒ１に対して並列に接続する電界効果トランジスターＱ１を有するダンピング回路２０１と、を備え、電界効果トランジスターＱ１は、駆動信号の電圧に応じてオンオフの動作を実行し、ダンピング抵抗の抵抗値を異ならせる。【選択図】図８
Bibliography:Application Number: JP20170081066