| Patent application number | Description | Published |
|---|
| 20090201341 | Adjustable Mount Printhead Assembly - A mounting assembly for a printhead assembly is described that can allow dynamic nozzle and drop placement adjustment in one or more directions. | 08-13-2009 |
| 20090231373 | CHARGE LEAKAGE PREVENTION FOR INKJET PRINTING - Charge leakage prevention and voltage drift prevention on a droplet ejection device for an inkjet printer. In one method to prevent charge leakage on a droplet ejection device with a switch and a piezoelectric actuator, the method includes controlling the switch to drive the piezoelectric actuator with the waveform input signal during a droplet firing period, and controlling the switch to drive the piezoelectric actuator with a constant voltage level during a non-firing period. | 09-17-2009 |
| 20100039479 | PRINTHEAD - Ink jet printheads and printhead components are described. | 02-18-2010 |
| 20100141709 | Shaping a Nozzle Outlet - A nozzle layer is described that has a semiconductor body having a first surface, a second surface opposing the first surface, and a nozzle formed through the body connecting the first and second surfaces, wherein the nozzle is configured to eject fluid through a nozzle outlet on the second surface, and the outlet having straight sides connected by curved corners. | 06-10-2010 |
| 20100141713 | Short Circuit Protection for Inkjet Printhead - Systems and apparatus for ejecting fluid. A fluid injection apparatus includes a fluid ejector unit for ejecting a droplet of fluid, an integrated circuit, and a conductive trace electrically coupling the fluid ejector unit and the integrated circuit. A portion of the conductive trace includes a fuse. | 06-10-2010 |
| 20100156998 | METHOD AND APPARATUS FOR PRINTING - Methods and apparatus for printing are described. A first mode of printing includes actuating a set of two or more actuators configured to drive printing fluid ejection from a corresponding set of two or more nozzles. In response to a drive signal, each actuator pressurizes a corresponding pumping chamber and ejects a printing fluid from a nozzle in fluid communication with the pumping chamber. The printing fluid ejected from the set of two or more nozzles represents a single pixel of an image being printed. A second mode of printing is in response to determining that a nozzle in the set of nozzles is operating defectively, and includes adjusting the one or more drive signals to the one or more remaining nozzles in the set such that the volume of printing fluid ejected from the remaining nozzles compensates for a lack of printing fluid ejected from the defective nozzle. | 06-24-2010 |
| 20100253721 | DEPOSITING DROPS ON A SUBSTRATE CARRIED BY A STAGE - A device for depositing drops includes a head configured to eject drops on a region of a substrate; a stage configured to hold the substrate while the head ejects drops on the region of the substrate; a first transporting device configured to transport the substrate in a transporting direction onto the stage; and a second transporting device configured to transport the substrate in the transporting direction off the stage. The stage and at least one of the first transporting device or the second transporting device are movable together in the transporting direction. | 10-07-2010 |
| 20110115852 | ACTUATABLE DEVICE WITH DIE AND INTEGRATED CIRCUIT ELEMENT - A fluid ejector includes a fluid ejection module and an integrated circuit element. The fluid ejection module includes a substrate having a plurality of fluid paths, a plurality of actuators, and a plurality of conductive traces, each actuator configured to cause a fluid to be ejected from a nozzle of an associated fluid path. The integrated circuit element is mounted on the fluid ejection module and is electrically connected with the conductive traces of the fluid ejection module such that an electrical connection of the module enables a signal sent to the fluid ejection module to be transmitted to the integrated circuit element, processed on the integrated circuit element, and output to the fluid ejection module to drive the actuator. | 05-19-2011 |
| 20110122179 | OVERCURRENT DETECTION FOR DROPLET EJECTORS - An apparatus, method, and a fluid ejection system for detecting electrical shorts in piezoelectric printheads are described. An apparatus includes a piezoelectric actuator, a transistor whose drain is connected to the piezoelectric actuator, a diode that is connected to a source and the drain of the transistor, a detection circuit configured to detect whether a voltage at the drain of the transistor is above a predefined voltage, and a disabling circuit configured to turning off the transistor in response to detecting that voltage at the drain of the transistor is above the predefined voltage. | 05-26-2011 |
| 20110157648 | Data Pump For Printing - Systems and techniques for printing on a workpiece. In one implementation, a data pump is used to create a packet of image data for a print head assembly. The data pump includes multiple state machines to receive image data from an image buffer on a computer, and a serializer to gather image data from each of the state machines. Each of the state machines is configured to send image data to the serializer at a different instance in time. The serializer is configured to arrange the gathered image data according to when the serializer received the image data from each of the state machines. The data pump also includes an optical fiber communication interface to connect with a communication channel. | 06-30-2011 |
