LIQUID DISCHARGE DEVICE AND CONTROL METHOD

• Main Authors: ISHIWATA TOMOKI, TOMIZAWA KEIJI, AIZAWA SO
• Format: Patent
• Language: English; Japanese
• Published: 27.03.2023
• 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 reduce scorch unevenness while restricting damage to heater materials.SOLUTION: A liquid discharge device comprises: a liquid discharge head which includes heater elements for generating energy required for discharging liquid, a first protective layer for blocking contact between the heater elements and the liquid, a second protective layer which partially covers the first protective layer and functions as a first electrode, a second electrode electrically connected to the first electrode via the liquid, and a discharge port for discharging the liquid; and control means for controlling setting so that a potential difference between a potential of the first electrode and a potential of the second electrode is a predetermined value, by varying the potential of at least one out of the first electrode and the second electrode. When printing is carried out, the control means sets the potential difference to a first value, but when printing is not performed, the control means sets the potential difference to a second value being different from the first value, in order to energize some of the plurality of heater elements.SELECTED DRAWING: Figure 21 【課題】ヒータ材へのダメージを抑えつつ、コゲムラを減らす。【解決手段】本発明の一実施形態は、液体の吐出に要するエネルギーを発生するための発熱素子と、前記発熱素子と前記液体との接触を遮断する第１保護層と、前記第１保護層のうち一部を覆い第１電極として機能する第２保護層と、前記液体を介して前記第１電極と電気的に接続される第２電極と、前記液体を吐出する吐出口と、を有する液体吐出ヘッドと、前記第１電極と前記第２電極との少なくとも一方の電位を変化させることで、該第１電極の電位と該第２電極の電位との間の電位差を所定の値に設定する制御を行う制御手段と、を有する液体吐出装置であって、印字を行うとき、前記制御手段は、前記電位差を第１値に設定し、印字を行わないとき、前記制御手段は、前記電位差を前記第１値と異なる第２値に設定し、複数の前記発熱素子のうち一部に対して通電する。【選択図】図２１