Liquid ejecting apparatus and liquid ejecting method
AssigneeSeiko Epson Corporation
InventorAtsushi Umeda
Life of this patent
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Abstract
A liquid ejection apparatus includes an element that is charged and discharged so as to perform an operation to eject a liquid, an analog signal generating unit that generates an analog signal having a voltage change pattern for determining the operation of the element, a charging transistor that amplifies a current of the analog signal while the element is charged, and pushes the amplified current toward the element, the charging transistor having a current source terminal, to which a current source is connected, and a push terminal for pushing the current, and a current source connector that selects at least one current source from among a plurality of current sources according to a voltage of the analog signal, and connects the selected current source to the current source terminal.
Claims13
A liquid ejecting apparatus, comprising:
- an element that is charged and discharged so as to perform an operation to eject a liquid;
- an analog signal generating unit that generates an analog signal having a voltage change pattern for determining the operation of the element;
- a charging transistor that amplifies a current of the analog signal while the element is charged, and pushes the amplified current toward the element, the charging transistor having a current source terminal, to which a current source is connected, and a push terminal for pushing the current;
- a current source connector that selects at least one current source from among a plurality of current sources according to a voltage of the analog signal, and connects the selected current source to the current source terminal,
- wherein the current source connector selects at least one current source from among the plurality of current sources at different voltages,
- wherein the plurality of current sources have a first current source at a first voltage and a second current source at a second voltage lower than the first voltage, and
- the current source connector includes:
- a current source switch that is provided between the first current source and the current source terminal, and
- a control circuit that outputs, to the current source switch, a control signal at a voltage level determined to control the operation of the current source switch on the basis of the voltage of the analog signal.
The liquid ejecting apparatus according to 1, wherein the first current source has a power supply circuit, and
- the second current source has a capacitor.
A liquid ejecting apparatus, comprising:
- an element that is charged and discharged so as to perform an operation to eject a liquid;
- an analog signal generating unit that generates an analog signal having a voltage change pattern for determining the operation of the element;
- a discharging transistor that amplifies the current of the analog signal while the element is discharged, and pulls the current from the element, the discharging transistor having a pull terminal for pulling the current and an emission terminal for emitting the charge;
- and
- a charge emission destination connector that selects at least one charge emission destination from among a plurality of charge emission destinations according to the voltage of the analog signal, and connects the selected charge emission destination to the emission terminal,
- wherein the charge emission destination connector selects at least one charge emission destination from among a plurality of charge emission destinations at different voltages,
- wherein the plurality of charge emission destinations have a first charge emission destination at a first voltage, and a second charge emission destination at a second voltage higher than the first voltage, and
- the charge emission destination connector includes:
- a charge emission destination switch that is provided between the emission terminal and the first charge emission destination, and
- a control circuit that outputs, to the charge emission destination switch, a control signal at a voltage level determined to control the operation of the charge emission destination switch on the basis of the voltage of the analog signal.
Dependencies are inferred from the claim text.