公开(公告)号：US11896971B2

公开(公告)日：2024-02-13

申请号：US17205016

申请日：2021-03-18

Applicant: Funai Electric Co., Ltd.

Inventor： Steven W. Bergstedt ,  Patricia A. Clore

IPC: B01L3/02 ,  G01N35/10

CPC classification number: B01L3/0268 ,  B01L3/0241 ,  G01N35/1016 ,  B01L3/02 ,  G01N2035/1025 ,  G01N2035/1041

Abstract: A fluid ejection head and a method of detecting the presence of fluid in an ejection chamber. The ejection head includes a semiconductor substrate having an elongate fluid supply via etched therethrough. An array of fluid ejectors is disposed adjacent to the fluid supply via, wherein the elongate fluid supply via provides fluid to the array of fluid ejectors for ejection of fluid from the ejection head. Fluid sense cells for the array of fluid ejectors are disposed at each end of the fluid supply via, wherein each of the fluid sense cells has a fluid ejector, an electrode disposed in a fluid chamber for the fluid ejector, and an electrode disposed in a fluid channel associated with a fluid chamber. A fluid detection circuit is provided in electrical communication with each of the fluid sense cells for detecting the presence or absence of fluid in the fluid chamber.

公开(公告)号：US11686696B2

公开(公告)日：2023-06-27

申请号：US17447478

申请日：2021-09-13

Applicant: Funai Electric Co., Ltd.

Inventor： Steven W. Bergstedt ,  Patricia A. Clore

IPC: G01N27/07 ,  G01R27/22 ,  B41J2/175

CPC classification number: G01N27/07 ,  B41J2/175 ,  G01R27/22

Abstract: A fluid dispensing system with a fluid cartridge having a fluid reservoir and an ejection head. The ejection head has fluid ejectors that are in fluid flow communication with the fluid reservoir. A fluid detection circuit is electrically connected to at least one of the fluid ejectors. The fluid detection circuit is configured to detect and characterize a fluid in the fluid ejector, where the fluid detection circuit characterizes the resistivity of the fluid by adjusting an ejector voltage of the at least one of the fluid ejectors.

公开(公告)号：US20240131504A1

公开(公告)日：2024-04-25

申请号：US18401973

申请日：2024-01-02

Applicant: Funai Electric Co., Ltd.

Inventor： Steven W. Bergstedt ,  Patricia A. Clore

IPC: B01L3/02 ,  G01V3/02

CPC classification number: B01L3/021 ,  G01V3/02 ,  B01L2200/026 ,  B01L2200/04 ,  B01L2300/0645 ,  B01L2300/0663

Abstract: A fluid ejection head and a method of detecting the presence of fluid in an ejection chamber. The ejection head includes a semiconductor substrate having an elongate fluid supply via etched therethrough. An array of fluid ejectors is disposed adjacent to the fluid supply via, wherein the elongate fluid supply via provides fluid to the array of fluid ejectors for ejection of fluid from the ejection head. Fluid sense cells for the array of fluid ejectors are disposed at each end of the fluid supply via, wherein each of the fluid sense cells has a fluid ejector, an electrode disposed in a fluid chamber for the fluid ejector, and an electrode disposed in a fluid channel associated with a fluid chamber. A fluid detection circuit is provided in electrical communication with each of the fluid sense cells for detecting the presence or absence of fluid in the fluid chamber.

公开(公告)号：US20230077341A1

公开(公告)日：2023-03-16

申请号：US17447478

申请日：2021-09-13

Applicant: Funai Electric Co., Ltd.

Inventor： Steven W. Bergstedt ,  Patricia A. Clore

IPC: G01N27/07 ,  G01R27/22

Abstract: A fluid dispensing system with a fluid cartridge having a fluid reservoir and an ejection head. The ejection head has fluid ejectors that are in fluid flow communication with the fluid reservoir. A fluid detection circuit is electrically connected to at least one of the fluid ejectors. The fluid detection circuit is configured to detect and characterize a fluid in the fluid ejector, where the fluid detection circuit characterizes the resistivity of the fluid by adjusting an ejector voltage of the at least one of the fluid ejectors.