公开(公告)号：US20170361603A1

公开(公告)日：2017-12-21

申请号：US15696398

申请日：2017-09-06

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

Inventor： Daryl E. Anderson ,  Eric T. Martin

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

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

Abstract: In some examples, a print head includes a plurality of nozzles, a test result register to store a drive bubble detect (DBD) test result for a first nozzle of the plurality of nozzles, and a result-ready register to store a status indication set to a predetermined value provided responsive to storing of the DBD test result in the test result register, where the test result register and the result-ready register are accessible by a control unit outside the print head to evaluate a nozzle condition based on the DBD test result in the test result register.

公开(公告)号：US20170001433A1

公开(公告)日：2017-01-05

申请号：US15114938

申请日：2014-01-30

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

Inventor： Daryl E. Anderson ,  Eric T. Martin ,  Peter James Fricke ,  James Michael Gardner

IPC: B41J2/045

CPC classification number: B41J2/04508 ,  B41J2/0451 ,  B41J2/0458 ,  B41J2/04586 ,  B41J2/14153 ,  B41J2/16579 ,  B41J2002/14354

Abstract: Systems and methods for evaluating the condition of a print nozzle are described. In one example, impedances across the print nozzle are measured. Subsequently, first test result and second test result are determined and registered at a first predetermined time instant and at a second predetermined time instant, respectively. The first test result and the second test result are obtained based on the measured impedances. Based on the first test result and the second test result, the condition of the print nozzle, is determined.

Abstract translation: 描述了用于评估打印喷嘴条件的系统和方法。 在一个示例中，测量打印喷嘴两端的阻抗。 随后，分别在第一预定时刻和第二预定时刻确定并登记第一测试结果和第二测试结果。 基于测量的阻抗获得第一测试结果和第二测试结果。 基于第一测试结果和第二测试结果，确定打印喷嘴的状态。

公开(公告)号：US09472288B2

公开(公告)日：2016-10-18

申请号：US14527466

申请日：2014-10-29

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

Inventor： James Michael Gardner ,  Eric T. Martin ,  Daryl E. Anderson

IPC: G11C16/10 ,  G11C16/30 ,  G11C16/04 ,  G11C16/08 ,  G11C16/12 ,  G03G21/18

CPC classification number: G11C16/10 ,  B41J2/17546 ,  G03G21/1882 ,  G11C16/0408 ,  G11C16/08 ,  G11C16/12 ,  G11C16/30

Abstract: Methods to program a floating gate memory array include, in response to a request to program a second bit of the floating gate memory array, at a first time, outputting a programming voltage to cause a first node voltage at a first source of a first transistor corresponding to a first bit, wherein the first node voltage is greater than a second node voltage at a second source of a second transistor corresponding to the second bit. The method further includes at a second time, increasing the programming voltage of the floating gate memory array to program the second bit of the floating gate memory array.

Abstract translation: 编程浮动栅极存储器阵列的方法包括响应于对浮置栅极存储器阵列的第二位进行编程的请求，在第一时间输出编程电压以使第一晶体管的第一源处的第一节点电压 对应于第一位，其中第一节点电压大于对应于第二位的第二晶体管的第二源处的第二节点电压。 该方法还包括第二时间，增加浮动栅极存储器阵列的编程电压以对浮动栅极存储器阵列的第二位进行编程。