公开(公告)号：US11052656B2

公开(公告)日：2021-07-06

申请号：US16613190

申请日：2017-07-11

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

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

IPC: B41J2/045 ,  B41J2/14

Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of fluid actuators grouped into primitives. The fluidic die also includes a fluid actuator controller to selectively activate fluid actuators via activation data. The fluidic die also includes an array of actuator evaluators, wherein each actuator evaluator of the fluidic die is coupled to a subset of the array of fluid actuators. The actuator evaluators selectively evaluate an actuator characteristic of a selected fluid actuator based on: an output of an actuator sensor paired with the selected fluid actuator, the activation data, and an evaluation control signal.

公开(公告)号：US11052655B2

公开(公告)日：2021-07-06

申请号：US16612716

申请日：2017-07-26

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

Inventor： Eric Martin ,  James Gardner ,  Jordi Hernandez

IPC: B41J2/045

Abstract: A die controller to control a fluidic die having a plurality of primitives each including a plurality of nozzles addressed by a same set of addresses. The die controller provides operational data including a series of actuation data groups to the fluidic die to actuate the nozzles to eject fluid to form an article, each actuation data group including a series of fire pulse groups, with each fire pulse group corresponding to a different address of the set of addresses and including a set of actuation data for each primitive and a set of start bits to initiate actuation of the nozzles based on the actuation data of the immediately preceding fire pulse group. The die controller to provide a blank fire pulse group immediately following a last fire pulse group of the series of fire pulse groups of each actuation data group when operating in an edge sharpness mode.

公开(公告)号：US11046071B2

公开(公告)日：2021-06-29

申请号：US16483513

申请日：2017-04-05

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

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

IPC: B41J2/045 ,  B41J2/14

Abstract: In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive. The die also includes a number of disable devices. Each disable device 1) is coupled to a respective actuator of the number of actuators and 2) disables a corresponding actuator when the corresponding actuator is determined to be malfunctioning.

公开(公告)号：US11020963B2

公开(公告)日：2021-06-01

申请号：US16760925

申请日：2017-12-11

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

Inventor： Eric Martin ,  Daryl E. Anderson

IPC: B41J2/045 ,  B41J2/14

Abstract: A fluidic die may include at least one fluidic passageway, at least one electrode disposed within the at least one fluidic passageway, and control circuitry to activate the electrode within the fluidic die. An impedance sensed at the electrode corresponds to a particle concentration within the fluid. The control circuitry activates the electrode during a separate pulse group assigned to the activation of the electrode among at least one other pulse group assigned to an activation of at least one fluid actuator within a column group.

公开(公告)号：US20210146695A1

公开(公告)日：2021-05-20

申请号：US17046877

申请日：2018-05-15

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

Inventor： Eric Martin ,  Terry McMahon ,  Donald W Schulte

IPC: B41J2/175 ,  H01L23/62 ,  H01L29/06 ,  H01L27/092

Abstract: A fluidic die includes fluid chambers, each including an electrode exposed to an interior of the fluid chamber and each having a corresponding fluid actuator operating at a high voltage. The fluidic die further includes monitoring circuitry, operating at a low voltage relative to the fluid actuator, to monitor a condition of each fluid chamber, for each chamber the monitoring circuitry including a connection structure and a select transistor and a pulldown transistor connected to the electrode via the connection structure. The connection structure and select and pulldown transistors together structured to form electrically conductive paths with electrical resistances to protect at least the select transistor from fault damage if the high voltage fluid actuator short-circuits to the electrode.

公开(公告)号：US10946651B2

公开(公告)日：2021-03-16

申请号：US16619341

申请日：2017-07-20

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

Inventor： Eric Martin ,  James Gardner ,  Rogelio Cicili

IPC: B41J2/14 ,  B41J2/045

Abstract: A fluidic die includes a sense architecture having a global sense block to provide an analog reference signal and an array of distributed sense blocks. Each distributed sense block is to receive a same set of addresses via an address bus and each is to receive a corresponding sense enable signal having an enable value or a disable value. Each distributed sense block includes an array of sensors, each sensor corresponding to a different address of the set of addresses and a sample circuit to apply the analog reference signal to the sensor corresponding to the address on the address bus when the corresponding sense enable signal has the enable value, and provide to the global sense block an analog sense signal from the sensor resulting from application of the analog reference signal.

公开(公告)号：US20210039383A1

公开(公告)日：2021-02-11

申请号：US16965703

申请日：2018-03-12

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

Inventor： Eric Martin ,  Tsuyoshi Yamashita ,  James R. Przybyla

IPC: B41J2/045

Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of fluid actuators grouped into primitives. Each actuator is disposed in a fluid chamber. The fluidic die also includes an array of fluid sensors. Each fluid sensor is disposed within a fluid chamber and determines a characteristic within the fluid chamber. A data parser of the fluidic die extracts from an incoming signal, firing instructions and measurement instructions for the fluidic die. The measurement instructions indicate at least one of a peak measurement during a nucleation event and a reference measurement during a non-nucleation event. A firing controller generates firing signals based on the firing instructions and a measurement controller activates, during a measurement interval of a printing cycle for the primitive, a measurement for a selected actuator based on the measurement instructions.

公开(公告)号：US20200298584A1

公开(公告)日：2020-09-24

申请号：US16608876

申请日：2017-12-11

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

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

IPC: B41J2/195

Abstract: A fluid reservoir (100) includes a circuit (105) extending in the fluid reservoir to be at least partially in contact with fluid (120) inside the fluid reservoir during use, at least a first impedance sensor (110) and second impedance sensor (115) coupled to the circuit, wherein the at least first and second impedance sensors are to output impedance values indicative of a degree of particle separation in the fluid.

公开(公告)号：US20200023638A1

公开(公告)日：2020-01-23

申请号：US16483811

申请日：2017-04-05

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

Inventor： Daryl E Anderson ,  Eric Martin

IPC: B41J2/045

Abstract: In one example in accordance with the present disclosure, a fluid ejection die is described. The die includes a number of actuator sensors disposed on the fluid ejection die to sense a characteristic of a corresponding actuator and to output a first voltage corresponding to the sensed characteristic c. Each actuator sensor is coupled to a respective actuator and multiple coupled actuator sensors and actuators are grouped as primitives on the fluid ejection die. The die also includes an actuator evaluation die per primitive to evaluate an actuator characteristic of any actuator within the primitive Based on the first voltage and a threshold voltage. The die also includes a time-shift chain component to communicate a delayed evaluation signal, which delayed evaluation signal delays an evaluation of the actuator characteristic a predetermined amount of time following an activation event.

公开(公告)号：US20190366709A1

公开(公告)日：2019-12-05

申请号：US16462298

申请日：2017-02-27

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

Inventor： Daryl E Anderson ,  Eric Martin ,  James Michael Gardner ,  Tsuyoshi Yamashita

IPC: B41J2/045

Abstract: In some examples, a fluid ejection system can include one or more drive bubble devices and a sensor for each drive bubble device of the one or more drive bubble devices to detect a characteristic of each drive bubble device. The fluid ejection system can also include a controller. The controller can be configured to evaluate a first drive bubble device of the one or more drive bubble devices, and during the evaluation of the first drive bubble device, utilize one or more other drive bubble devices of the one or more drive bubble devices.