公开(公告)号：US09776394B2

公开(公告)日：2017-10-03

申请号：US15306028

申请日：2014-04-25

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Daryl E. Anderson ,  Eric T. Martin

IPC: B41J2/045 ,  B41J2/30 ,  B41J29/38 ,  B41J2/21

CPC classification number: B41J2/0451 ,  B41J2/04555 ,  B41J2/0458 ,  B41J2/2142 ,  B41J29/38

Abstract: The present subject matter relates to evaluating nozzle condition of a plurality of nozzles. In one example, drive bubble detect (DBD) test results for a set of nozzles from among the plurality of nozzles are stored by a print head in a test result register, where the test result register is provided onto the print head. Further, status bits of a result-ready register provided in the print head are set to a predetermined value by the print head responsive to storing of the DBD test results in the test result register. Further, based on the setting, the DBD test results are obtained by a control unit, from the test result register, for evaluating the nozzle condition.

公开(公告)号：US09630400B2

公开(公告)日：2017-04-25

申请号：US15029555

申请日：2013-10-15

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Daryl E. Anderson ,  Huston W. Rice ,  Eric T. Martin

IPC: B41J2/045 ,  G06F21/62

CPC classification number: B41J29/38 ,  B41J2/04535 ,  B41J2/04565 ,  B41J2/0458 ,  B41J2/04586 ,  B41J2202/17 ,  G06F21/62

Abstract: A print head die includes a storage element. The print head die includes a plurality of analog devices. The storage element is to store an authentication value. The authentication value is generated based on comparisons of the measured electrical characteristics of at least some of the analog devices.

公开(公告)号：US09463622B2

公开(公告)日：2016-10-11

申请号：US14961273

申请日：2015-12-07

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Andrew L. Van Brocklin ,  Eric T. Martin ,  Alexander Govyadinov ,  David Maxfield

IPC: B41J2/045 ,  B41J2/14 ,  B41J29/393

CPC classification number: B41J2/14153 ,  B41J2/0451 ,  B41J2/04555 ,  B41J2/0458 ,  B41J2/04586 ,  B41J29/393 ,  B41J2002/14354

Abstract: A method for determining an issue in an inkjet nozzle with impedance measurements, includes taking a first impedance measurement to detect a drive bubble with an impedance sensor; and taking a second impedance measurement to detect said drive bubble with said impedance sensor after said first impedance measurement.

公开(公告)号：US20160082725A1

公开(公告)日：2016-03-24

申请号：US14961273

申请日：2015-12-07

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Andrew L. Van Brocklin ,  Eric T. Martin ,  Alexander Govyadinov ,  David Maxfield

IPC: B41J2/045

CPC classification number: B41J2/14153 ,  B41J2/0451 ,  B41J2/04555 ,  B41J2/0458 ,  B41J2/04586 ,  B41J29/393 ,  B41J2002/14354

Abstract: A method for determining an issue in an inkjet nozzle with impedance measurements, includes taking a first impedance measurement to detect a drive bubble with an impedance sensor; and taking a second impedance measurement to detect said drive bubble with said impedance sensor after said first impedance measurement.

Abstract translation: 一种用于通过阻抗测量确定喷墨喷嘴中的问题的方法，包括采用第一阻抗测量来利用阻抗传感器检测驱动气泡; 以及在所述第一阻抗测量之后，用所述阻抗传感器进行第二阻抗测量来检测所述驱动气泡。

公开(公告)号：US20150022575A1

公开(公告)日：2015-01-22

申请号：US14374807

申请日：2012-01-31

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Garrett E. Clark ,  Chris Bakker ,  Eric T. Martin ,  Vincent Gerard Heesen ,  Mark H. Mackenzie

IPC: B41J2/045

CPC classification number: B41J2/0457 ,  B41J2/0452 ,  B41J2/04543 ,  B41J2/04586 ,  B41J2/2054 ,  B41J2/2132

Abstract: A printhead system to reduce peak energy usage may include a printhead including a plurality of primitives including nozzles. A printhead control module may control the printhead to increase printed pixel resolution and to reduce peak pixel fill density for print media. The printhead control module may further control the printhead such that all the nozzles with a same address generally disposed in a column do not fire at the same time.

Abstract translation: 用于减少峰值能量使用的打印头系统可以包括包括多个包括喷嘴的图元的打印头。 打印头控制模块可以控制打印头以增加打印像素分辨率并减少打印介质的峰值像素填充密度。 打印头控制模块可以进一步控制打印头，使得具有通常设置在列中的相同地址的所有喷嘴不会同时触发。

公开(公告)号：US08888226B1

公开(公告)日：2014-11-18

申请号：US13926171

申请日：2013-06-25

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： James M. Gardner ,  Chris Bakker ,  Eric T. Martin

IPC: B41J29/393 ,  B41J29/38

CPC classification number: B41J29/38 ,  B41J2/14072 ,  B41J2/14153

Abstract: Crack detection circuits for printheads are described. In an example, a crack detection circuit for at least one printhead, includes: crack detectors formed on the at least one printhead; switches selectively coupling the crack detectors on each printhead to a communication bus; and a configuration circuit on each printhead coupled to control inputs of the respective switches, each configuration circuit responsive to a crack detection configuration input to control the respective switches.

Abstract translation: 描述了用于打印头的裂纹检测电路。 在一个示例中，用于至少一个打印头的裂纹检测电路包括：形成在所述至少一个打印头上的裂纹检测器; 开关选择性地将每个打印头上的裂纹检测器耦合到通信总线; 以及每个打印头上的配置电路，其耦合到控制各个开关的输入，每个配置电路响应于裂纹检测配置输入以控制相应的开关。