Patent application number | Description | Published |
20140285548 | LIQUID DISCHARGE APPARATUS - A liquid discharge apparatus includes a discharge section, a charge supply source, first and second signal paths, and a connection path selection section. The connection path selection section uses the first or second signal path to electrically connect a piezoelectric element and the charge supply source. The charge supply source include a number n (where n is a plurality) of capacitive elements, and a switching section configured and arranged to switch between a series state where the n capacitive elements are electrically connected in series and a parallel state where the n capacitive elements are electrically connected in parallel. In the series state, a given first point out of connection points between the n capacitive elements is connected to the first signal path, and a second point higher than the first point out of the connection points of the n capacitive elements is connected to the second signal path. | 09-25-2014 |
20140285552 | LIQUID DISCHARGE APPARATUS AND METHOD OF DISCHARGING LIQUID - A liquid discharge apparatus includes an actuator element configured and arranged to receive a drive signal to discharge a liquid, the liquid being an ink including 0.1 wt % to 10 wt % of a polar solvent. The waveform of the drive signal supplied to the actuator element includes a non-rectangular shaped pulse with a ripple being formed in a falling portion of the non-rectangular shaped pulse. | 09-25-2014 |
20140285553 | LIQUID DISCHARGE APPARATUS - A liquid discharge apparatus includes first and second discharge sections, first and second connection paths and a voltage generation section. Each of the first and second discharge sections has a nozzle configured and arranged to discharge a liquid, a pressure chamber in communication with the nozzle, and a piezoelectric element. The first connection path selection section is arranged so as to correspond to the first discharge section and configured to selectively supply a plurality of voltages to the first discharge section. The second connection path selection section is arranged so as to correspond to the second discharge section and configured to selectively supply a plurality of voltages to the second discharge section. The voltage generation section is configured to generate and supply the voltages shared by the first connection path selection section and the second connection path selection section. | 09-25-2014 |
20140285556 | LIQUID DISCHARGE APPARATUS AND CAPACITIVE LOAD DRIVING CIRCUIT - A liquid discharge apparatus includes a discharge section, a charge supply source, first and second signal paths, a control signal generation section and a connection path selection section. The discharge section includes a nozzle configured and arranged to discharge a liquid, a pressure chamber in communication with the nozzle, and a piezoelectric element provided for the pressure chamber. A first voltage is applied by the charge supply source through the first signal path. A second voltage higher than the first voltage is applied by the charge supply source through the second signal path. The control signal generation section is configured to supply a control signal. The connection path selection section is configured to use the first or second signal path to electrically connect the piezoelectric element and the charge supply source in accordance with a voltage of the control signal and a holding voltage of the piezoelectric element. | 09-25-2014 |
20150137661 | CAPACITIVE LOAD DRIVE CIRCUIT - A capacitive load drive circuit includes first and second capacitive loads, first and second connection path selection sections, and a voltage generation section. The first capacitive load and the second capacitive load are configured to charge and discharge in accordance with a drive signal. The first connection path selection section is configured to selectively supply a plurality of voltages to the first capacitive load, the first connection path selection section being arranged so as to correspond to the first capacitive load. The second connection path selection section is configured to selectively supply a plurality of voltages to the second capacitive load. The second connection path selection section is arranged so as to correspond to the second capacitive load. The voltage generation section is configured to generate and supply the voltages shared by the first connection path selection section and the second connection path selection section. | 05-21-2015 |
Patent application number | Description | Published |
20140285551 | Printing Apparatus - A printing apparatus that discharges liquid droplets onto a recording medium, includes a movable carriage; discharging units, which are installed on the carriage and include piezoelectric elements for discharging the liquid; a first circuit substrate, which is installed outside of the carriage, and on which is installed a control signal supply unit that generates control signals; a second circuit substrate, which is installed on the carriage, and on which is installed a circuit that charges or discharges each of the piezoelectric elements according to the control signals; which supplies a power supply voltage and a ground voltage to the second circuit substrate, in which a total path length of the plurality of wirings between the first circuit substrate and the second circuit substrate is shorter than the total path length of the wiring between the second circuit substrate and each of the piezoelectric elements. | 09-25-2014 |
20140285555 | Liquid Discharging Apparatus - Each of M head units of a print head includes a driving signal generator and a plurality of piezoelectric elements. A common control signal is supplied from a control signal supply portion of a control unit to the respective driving signal generators of the M head units. The driving signal generator of each head unit generates a driving signal from the control signal according to characteristics (for example, relationship of a deformation amount with respect to an applied voltage) of each latter stage piezoelectric element and supplies the driving signal to each piezoelectric element. | 09-25-2014 |
20140285557 | Printing Apparatus - A printing apparatus that discharges liquid droplets onto a recording medium, includes a movable carriage; discharging units, which are installed on the carriage and include nozzles that discharge a liquid, pressure chambers that communicate with the nozzles, and piezoelectric elements provided for each of the pressure chambers; a first circuit substrate, which is installed outside of the carriage, and on which is installed a control signal supply unit that generates control signals; a second circuit substrate, which is installed on the carriage, and on which are installed a booster circuit that generates a plurality of voltages; in which a path length of the control wiring between the first circuit substrate and the second circuit substrate is longer than the path length of the wiring between the second circuit substrate and the piezoelectric elements. | 09-25-2014 |