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公开(公告)号：US20240326418A1
公开(公告)日：2024-10-03
申请号：US18616316
申请日：2024-03-26
发明人： Akira MIYAGISHI , Asami OKAMOTO
IPC分类号： B41J2/045
CPC分类号： B41J2/04588 , B41J2/04563 , B41J2/04573 , B41J2/04581
摘要： An inspection signal includes a first potential-changing element having a potential that changes from a first potential to a second potential in one direction in a first time period, a first potential-maintaining element having the second potential maintained in a second time period immediately after the first time period, a second potential-changing element having a potential that changes from the second potential to a third potential in the other direction in a third time period immediately after the second time period, and a second potential-maintaining element having the third potential maintained in a fourth time period immediately after the third time period. When a natural vibration period of an ejecting section is TC, a length of the first time period is equal to or longer than 0.75×TC. A vibration detector detects a residual vibration in a detection period included in the fourth time period.
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公开(公告)号：US20240316921A1
公开(公告)日：2024-09-26
申请号：US18611784
申请日：2024-03-21
发明人： Asami OKAMOTO
CPC分类号： B41J2/04581 , B41J2/025
摘要： A head unit includes a piezoelectric element displaced according to a driving signal to cause a liquid to be ejected, a driving signal generation unit that generates the driving signal, a residual vibration signal generation circuit that outputs a change in an electromotive force of the piezoelectric element according to residual vibration, in a pressure chamber in communication with a nozzle, that occurs after supply of the driving signal, as a residual vibration signal, an analog differential residual vibration signal generation circuit that converts the residual vibration signal into an analog differential residual vibration signal, a demodulation circuit that demodulates the analog differential residual vibration signal and outputs a demodulated signal, an AD converter that converts the demodulated signal into a digital signal, and a determination unit that determines, based on the digital signal, a state in the pressure chamber.
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公开(公告)号：US20220348009A1
公开(公告)日：2022-11-03
申请号：US17732732
申请日：2022-04-29
发明人： Asami OKAMOTO
IPC分类号： B41J2/045
摘要： There is provided a head unit including: a discharge section that includes a piezoelectric element driven by a driving signal and discharges a liquid; a first substrate; a second substrate; and a coupling member that electrically couples the first substrate and the second substrate, in which the coupling member includes a pin header having a plurality of insertion pins including a first insertion pin and a second insertion pin, and a holding section that holds the plurality of insertion pins in a state of being insulated, and a pin socket having the same number of a plurality of insertion holes as the plurality of insertion pins, which are provided corresponding to the plurality of insertion pins, and the coupling member electrically couples the first substrate and the second substrate by inserting the plurality of insertion pins into the corresponding plurality of insertion holes.
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公开(公告)号：US20220348008A1
公开(公告)日：2022-11-03
申请号：US17732676
申请日：2022-04-29
发明人： Asami OKAMOTO
IPC分类号： B41J2/045
摘要： There is provided a head unit including: a discharge section that includes a piezoelectric element driven by a first driving signal and discharges a liquid; a switching circuit that switches whether or not to supply the first driving signal; a first substrate that propagates the first driving signal and the discharge control signal to the switching circuit; a second substrate to which the first driving signal and the discharge control signal are supplied and which propagates the first driving signal and the discharge control signal to the first substrate; a first coupling member including a first conductive section that electrically couples the first substrate and the second substrate; and a second coupling member including a second conductive section that electrically couples the first substrate and the second substrate, in which a cross-sectional area of the first conductive section is larger than a cross-sectional area of the second conductive section.
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公开(公告)号：US20240326415A1
公开(公告)日：2024-10-03
申请号：US18617053
申请日：2024-03-26
发明人： Asami OKAMOTO , Akira MIYAGISHI
IPC分类号： B41J2/045
CPC分类号： B41J2/04581 , B41J2/04563 , B41J2/04573
摘要： A first drive signal includes a first drive pulse that displaces a first piezoelectric element in a first period of a drive cycle, a second drive signal includes a first reference potential maintaining element that maintains a reference potential in a first start period including a start point of the drive cycle, a first potential maintaining element that maintains a first potential in a second period of the drive cycle following the first period, and a second reference potential maintaining element that maintains the reference potential in a first end period that starts after an end of the second period and includes an end point of the drive cycle, a vibration detection section detects a remaining vibration that occurs in a first discharge section in the second period, and a generation section maintains the first potential at a constant potential, regardless of a temperature detected by a temperature detection section.
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公开(公告)号：US20220063266A1
公开(公告)日：2022-03-03
申请号：US17460425
申请日：2021-08-30
发明人： Yoichiro KONDO , Toru KASHIMURA , Asami OKAMOTO
摘要： A liquid ejecting apparatus includes a liquid ejecting head, a first drive signal, a second drive signal output circuit, a third drive signal output circuit that outputs a third drive signal, having a smaller voltage amplitude than voltage amplitudes of other drive signals, to drive the liquid ejecting head, and a first conductive component including a first conductive section that electrically couples the liquid ejecting head to the first drive signal output circuit, a second conductive section that electrically couples the liquid ejecting head to the second drive signal output circuit, and a third conductive section that electrically couples the liquid ejecting head to the third drive signal output circuit. The first conductive section is positioned between the second conductive section and the third conductive section.
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