Inkjet head driving method and driving device
AssigneesKabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
InventorsShunichi Ono, Teruyuki Hiyoshi, Mamoru Kimura, Noboru Nitta
Life of this patent
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Abstract
According to one embodiment, a driving device applies an ejection pulse signal that deforms a partition in such a way that an ink drop is ejected from a nozzle and an auxiliary pulse signal that deforms the partition to such an extent that an ink drop is not ejected from the nozzle, as a drive signal for providing a potential difference between electrodes, to an inkjet head at different timings so that the two pulse signals are not applied simultaneously. A constraint on output of the auxiliary pulse signal is significantly relaxed.
Claims12
A driving device for an inkjet head in which an electrode is arranged on a wall surface of each of plural ink chambers provided parallel to each other and separated from each other by a partition made of a piezoelectric material, a potential difference is provided between the electrodes of two adjacent ink chambers, the partition between the electrodes is thus deformed, and one to plural ink drops are ejected from a nozzle communicating with the ink chamber including the deformed partition as a wall surface thereof, thus forming a pixel, the device comprising:
- an ejection pulse application unit configured to apply an ejection pulse signal which deforms a partition in such a way that an ink drop is ejected from the nozzle, as a drive signal for providing a potential difference between the electrodes, to the inkjet head;
- an auxiliary pulse application unit configured to apply an auxiliary pulse signal which deforms the partition to such an extent that an ink drop is not ejected from the nozzle, as a drive signal for providing a potential difference between electrodes, to the inkjet head;
- and
- a control unit configured to cause the ejection pulse signal and the auxiliary pulse signal to be applied to the inkjet head at different timings so that the ejection pulse signal and the auxiliary pulse signal are not applied simultaneously.
A driving method for an inkjet head in which an electrode is arranged on a wall surface of each of plural ink chambers provided parallel to each other and separated from each other by a partition made of a piezoelectric material, a potential difference is provided between the electrodes of two adjacent ink chambers, the partition between the electrodes is thus deformed, and one to plural ink drops are ejected from a nozzle communicating with the ink chamber including the deformed partition as a wall surface thereof, thus forming a pixel, the method comprising:
- applying an ejection pulse signal that deforms the partition in such a way that an ink drop is ejected from the nozzle and an auxiliary pulse signal that deforms the partition to such an extent that an ink drop is not ejected from the nozzle, as a drive signal for providing a potential difference between the electrodes, to the inkjet head at different timings so that the two pulse signals are not applied simultaneously, and thereby driving the inkjet head.
Dependencies are inferred from the claim text.