LIQUID DISCHARGE DEVICE

• Main Authors: SASAKI ZENICHIRO, HAYASHI MASAYOSHI, TANAKA NOBUMASA, NAKASE TAKAFUMI
• Format: Patent
• Language: English; Japanese
• Published: 09.11.2022
• 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

To more accurately determine whether a nozzle is abnormal or not while suppressing the influence of noise.SOLUTION: A liquid discharge device obtains a signal during non-driving that is output from a signal processing circuit in a state where driving for inspection is not performed (S102); obtains a signal for determination for determining whether a nozzle is abnormal or not, which is output from the signal processing circuit when making an inkjet head perform the driving for inspection (S104); overlaps the signal for determination with the signal during non-driving so that a difference between a value of the signal for determination and a value of signal during non-driving becomes minimum to generate a differential signal that is a signal showing the difference between the value of the signal for determination and the value of the signal during non-driving at each timing (S105); and determines whether the nozzle is abnormal or not on the basis of the differential signal (S106).SELECTED DRAWING: Figure 5 【課題】ノイズの影響を抑えて異常ノズルであるか否かをより精度よく判定する。【解決手段】検査用駆動が行われていない状態で信号処理回路から出力される非駆動時信号を取得する（Ｓ１０２）。インクジェットヘッドに検査用駆動を行わせたときに信号処理回路から出力される、異常ノズルであるか否かを判定するための判定用信号を取得する（Ｓ１０４）。判定用信号の値と非駆動時信号の値の差が最も小さくなるように判定用信号と非駆動時信号とを重ね、各タイミングでの判定用信号の値と非駆動時信号の値との差の信号である差分信号を生成する（Ｓ１０５）。そして、差分信号に基づいて、異常ノズルであるか否かを判定する（Ｓ１０６）。【選択図】図５