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公开(公告)号：US10589523B2
公开(公告)日：2020-03-17
申请号：US16318214
申请日：2016-10-31
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E Anderson , Eric Martin , James Gardner
Abstract: A fluid ejection device with a fluid chamber including a vaporization chamber and a thermal drive bubble formation mechanism to vaporize a portion of a fluid in the vaporization chamber to form a drive bubble in response to a firing signal during a firing operation. A drive bubble detect sensor separate from the thermal drive bubble formation mechanism and in contact with fluid in the vaporization chamber, the drive bubble detect sensor to inject a fixed current through the vaporization chamber to generate a first voltage signal representing a voltage response of the vaporization chamber and indicative of drive bubble formation during the firing operation. A thermal sensor to generate a second voltage signal indicative of a thermal response of the vaporization chamber during the firing operation, the first and second voltage signals combined being representative of an operating condition of the fluid chamber.
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公开(公告)号：US11351789B2
公开(公告)日：2022-06-07
申请号：US16988296
申请日：2020-08-07
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E Anderson , Eric Martin , James Gardner
Abstract: A fluid ejection device includes a number of primitives, each receiving a same set of addresses and including a number of ejection chambers, each corresponding to a different address of the set of addresses and including a drive bubble formation mechanism and a drive bubble detect (DBD) mechanism. Input logic receives nozzle column data groups (NCG), each NCG including fire pulse groups (FPG), each FPG including DBD data having an enable value or disable value, and ejection data bits, each ejection data bit corresponding to a different one of the primitives. For each FPG of each NCG, activation logic identifies the FPG as a DBD FPG when the DBD data has the enable value and activates in each primitive the drive bubble formation mechanism and the DBD mechanism identified by the DBD FPG to perform a DBD measurement.
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13.发明申请公开(公告)号：US20200369035A1
公开(公告)日：2020-11-26
申请号：US16988296
申请日：2020-08-07
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E Anderson , Eric Martin , James Gardner
Abstract: A fluid ejection device includes a number of primitives, each receiving a same set of addresses and including a number of ejection chambers, each corresponding to a different address of the set of addresses and including a drive bubble formation mechanism and a drive bubble detect (DBD) mechanism. Input logic receives nozzle column data groups (NCG), each NCG including fire pulse groups (FPG), each FPG including DBD data having an enable value or disable value, and ejection data bits, each ejection data bit corresponding to a different one of the primitives. For each FPG of each NCG, activation logic identifies the FPG as a DBD FPG when the DBD data has the enable value and activates in each primitive the drive bubble formation mechanism and the DBD mechanism identified by the DBD FPG to perform a DBD measurement.
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公开(公告)号：US20190375206A1
公开(公告)日：2019-12-12
申请号：US16331862
申请日：2016-12-14
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E Anderson , Eric Martin , James Gardner
Abstract: Examples include a fluid ejection die. Examples comprise an array of nozzles, where each respective nozzle includes a respective fluid ejector. Examples further include at least one die sensor. Furthermore, the examples include signal control logic to suppress transmission of a first set of signals for the fluid ejection die during sensing of die characteristics with the at least one die sensor.
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公开(公告)号：US20190248131A1
公开(公告)日：2019-08-15
申请号：US16318214
申请日：2016-10-31
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E Anderson , Eric Martin , James Gardner
CPC classification number: B41J2/0458 , B41J2/04543 , B41J2/04555 , B41J2/04563 , B41J2/14153 , B41J2/175 , B41J2202/12
Abstract: A fluid ejection device with a fluid chamber including a vaporization chamber and a thermal drive bubble formation mechanism to vaporize a portion of a fluid in the vaporization chamber to form a drive bubble in response to a firing signal during a firing operation. A drive bubble detect sensor separate from the thermal drive bubble formation mechanism and in contact with fluid in the vaporization chamber, the drive bubble detect sensor to inject a fixed current through the vaporization chamber to generate a first voltage signal representing a voltage response of the vaporization chamber and indicative of drive bubble formation during the firing operation. A thermal sensor to generate a second voltage signal indicative of a thermal response of the vaporization chamber during the firing operation, the first and second voltage signals combined being representative of an operating condition of the fluid chamber.
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Patent Agency Ranking
公开(公告)号：US11135840B2
公开(公告)日：2021-10-05
申请号：US16490838
申请日：2017-04-24
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： James Gardner , Berkeley Fisher , Andrew Koll
IPC: B41J2/14
Abstract: A fluid ejection system includes a fluid ejection die and a controller. The fluid ejection die includes a plurality of nozzles to eject fluid drops and a plurality of strain gauge sensors to sense strain within the fluid ejection die. The controller is to receive the sensed strain from each strain gauge sensor to determine a status of the fluid ejection die.
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公开(公告)号：US11020964B2
公开(公告)日：2021-06-01
申请号：US16482763
申请日：2017-04-10
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Vincent C Korthuis , James Gardner , Eric T Martin
Abstract: A fluid ejection system includes a group of actuators and a controller. The controller can determine an operational mode of the fluid ejection system. Examples of operational modes include a service mode. In response to determining the fluid ejection system is in the service mode, the controller can modify a firing event sequence of each actuator in the group of actuators. The modification of the firing event sequence can be based in part on determining the fluid ejection system is operating in the service mode.
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公开(公告)号：US20210129532A1
公开(公告)日：2021-05-06
申请号：US16486943
申请日：2017-04-24
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E Anderson , James Gardner
IPC: B41J2/125 , B41J2/045 , B41J2/14 , G01L5/1627
Abstract: A fluid ejection die includes a plurality of actuation devices to eject fluid drops, at least one strain gauge sensor to sense strain, and a comparator. The comparator is to provide a fault signal in response to the sensed strain exceeding an impact threshold.
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公开(公告)号：US10807360B2
公开(公告)日：2020-10-20
申请号：US16331862
申请日：2016-12-14
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Daryl E Anderson , Eric Martin , James Gardner
Abstract: Examples include a fluid ejection die. Examples comprise an array of nozzles, where each respective nozzle includes a respective fluid ejector. Examples further include at least one die sensor. Furthermore, the examples include signal control logic to suppress transmission of a first set of signals for the fluid ejection die during sensing of die characteristics with the at least one die sensor.
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公开(公告)号：US10759163B2
公开(公告)日：2020-09-01
申请号：US15516390
申请日：2014-10-27
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Eric T Martin , Daryl E Anderson , James Gardner
IPC: B41J2/045 , B41J2/14 , B41J29/38 , B41J29/393 , H02J9/06
Abstract: A method of operating a printing device during a power loss event includes, with a power loss protection supply voltage generator coupled to a printhead driving circuit, maintaining a power loss protection supply voltage (VDD_plp) to the printhead driving circuit until a high voltage power supply (VPP) to the high voltage devices drops below a threshold voltage.
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