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 |
20150197083 | LIQUID DISCHARGE APPARATUS, HEAD UNIT, AND CONTROL METHOD OF LIQUID DISCHARGE APPARATUS - A liquid discharge apparatus includes: an original drive signal generator that generates a plurality of original drive signals which includes a first original drive signal and a second original drive signal; a selection section that is capable of selecting one original drive signal from the plurality of original drive signals which includes the first original drive signal and the second original drive signal; a driver that generates a drive signal of voltages in accordance with the one original drive signal; a piezoelectric element that is displaced according to the drive signal; a cavity of which an inside volume is changed due to the displacement of the piezoelectric element; and a nozzle that is provided to discharge a liquid in the cavity according to the change of the inside volume of the cavity. | 07-16-2015 |
20150197084 | LIQUID DISCHARGE APPARATUS, HEAD UNIT, AND CONTROL METHOD OF LIQUID DISCHARGE APPARATUS - A liquid discharge apparatus includes: a piezoelectric element that is displaced according to a voltage of a drive signal; a cavity which is filled with a liquid and of which an inside volume is changed due to the displacement of the piezoelectric element; a nozzle that communicates with the cavity and is capable of discharging the liquid; a charge source that supplies a charge to the piezoelectric element; and a connection path selecting section that causes the piezoelectric element and the charge source to be electrically connected to each other by using a first signal path or a second signal path. The charge source includes: a first auxiliary power source that outputs two types or more of voltages; and a second auxiliary power source that outputs three types or more of voltages by using the two types or more of voltages output from the first auxiliary power source. | 07-16-2015 |
20150314596 | LIQUID DISCHARGE APPARATUS AND CONTROL METHOD OF LIQUID DISCHARGE APPARATUS - A liquid discharge apparatus includes a piezoelectric element in which a drive signal is applied and which is displaced to eject a liquid; a zeroth wire of a zeroth potential; a first wire of a first potential that is higher than the zeroth potential; a second wire of a second potential that is higher than the first potential; and a connection path selecting section that electrically connects one end of the piezoelectric element to the zeroth wire, the first wire, or the second wire in response to a voltage of a source drive signal that controls the voltage of the drive signal and a hold voltage of the piezoelectric element. Here, a first potential difference from the zeroth potential to the first potential is different from a second potential difference from the first potential to the second potential. | 11-05-2015 |