Patents by Inventor Noboru Nitta
Noboru Nitta has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9908325Abstract: A first output section outputs a first parameter calculated for each nozzle in a group obtained by dividing the nozzles into groups for each certain number so that density unevenness of ink ejected from each nozzle in the group is corrected. A second output section outputs a second parameter calculated for each group so that change rate of the density unevenness between groups is corrected. A first register circuit divides first parameters for each nozzle in the group and stores the first parameters. A second register circuit divides second parameters for each group and stores the second parameters. A multiplication section sequentially multiplies the first parameters by the second parameters. A conversion section converts a multiplication value to correction data of each nozzle. A setting section sets the correction data in a memory.Type: GrantFiled: December 20, 2016Date of Patent: March 6, 2018Assignee: TOSHIBA TEC KABUSHIKI KAISHAInventors: Noboru Nitta, Teruyuki Hiyoshi, Shunichi Ono
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Patent number: 9889645Abstract: In accordance with an embodiment, an inkjet head comprises an ejection section and a driving section. The ejection section ejects ink according to the operations of an actuator. In order to make the ejection section eject different amount of ink for different drops, the driving section applies voltage to the actuator of the ejection section such that the ejection section ejects ink continuously based on the printing data indicating the times the ejection section ejects ink and a position flag designating a drop frame number where ink starting to be ejected.Type: GrantFiled: December 11, 2015Date of Patent: February 13, 2018Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Mamoru Kimura, Noboru Nitta, Teruyuki Hiyoshi
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Publication number: 20170305148Abstract: A correction data setting apparatus, which sets correction data in a memory for storing the correction data for correcting a pulse width of a drive pulse signal applied to each actuator corresponding to each nozzle of an inkjet head, comprises a generation section which sequentially generates a channel No. for individually identifying each nozzle; an output section which outputs a parameter required for arithmetic which represents a characteristic of a correction amount with respect to an arrangement direction of the nozzles; an arithmetic section which executes the arithmetic using the parameter output from the output section to calculate the correction amount for each channel No. generated from the generation section; a conversion section converts the correction amount calculated for each channel No. by the arithmetic section to the correction data; and a setting section sets the correction data obtained for each channel No. by the conversion section in the memory.Type: ApplicationFiled: March 8, 2017Publication date: October 26, 2017Inventors: Noboru Nitta, Teruyuki Hiyoshi, Shunichi Ono
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Patent number: 9776420Abstract: According to embodiments, an inkjet recording apparatus includes an ink tank which contains ink, a printing head which is connected to the ink tank through an ink channel and ejects the ink from a nozzle surface, and a channel member which is provided in the ink channel and has a clearance gap that connects the ink channel to the outside. The channel member is provided in a part of the ink channel, which has a positive pressure with respect to the atmospheric pressure at least during a period in which the printing head is capable of printing.Type: GrantFiled: December 11, 2014Date of Patent: October 3, 2017Assignee: TOSHIBA TEC KABUSHIKI KAISHAInventor: Noboru Nitta
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Publication number: 20170259564Abstract: In accordance with an embodiment, an inkjet head comprises a pressure chamber configured to house ink; an actuator configured to be arranged corresponding to the pressure chamber; a plate configured to have a nozzle communicating with the pressure chamber; and a driving circuit configured to drive the actuator, wherein the drive circuit applies an auxiliary pulse signal which contains an expansion pulse for expanding the volume of the pressure chamber and a contraction pulse for contracting the volume of the pressure chamber in such a degree as not to eject an ink drop from the nozzle to the actuator before enabling the ink drop to be ejected from the nozzle communicating with the pressure chamber by applying the expansion pulse and the contraction pulse as a drive pulse signals.Type: ApplicationFiled: May 31, 2017Publication date: September 14, 2017Inventors: Noboru Nitta, Yasuhito Komai
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Publication number: 20170217162Abstract: An ink jet head includes first side walls including two piezoelectric elements, second side walls, a first electrode, a second electrode, an ink chamber containing conductive ink, and a control unit. The second side walls alternate with the first side walls to provide side surfaces for driving pressure chambers and dummy pressure chambers. On one of the first side walls, the first electrode is on the side wall surface of a driving pressure chamber and a second electrode is on the side wall surface of a dummy pressure chamber. The control unit applies a voltage having a first waveform to the first electrode, and a voltage having a second waveform, a portion of which is inverted with respect to the first waveform, to the second electrode to cause ink to be ejected, and cause the second electrode to electrically float such that ink is not ejected.Type: ApplicationFiled: January 10, 2017Publication date: August 3, 2017Inventors: Teruyuki HIYOSHI, Noboru NITTA, Syunichi ONO
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Publication number: 20170203560Abstract: A first output section outputs a first parameter calculated for each nozzle in a group obtained by dividing the nozzles into groups for each certain number so that density unevenness of ink ejected from each nozzle in the group is corrected. A second output section outputs a second parameter calculated for each group so that change rate of the density unevenness between groups is corrected. A first register circuit divides first parameters for each nozzle in the group and stores the first parameters. A second register circuit divides second parameters for each group and stores the second parameters. A multiplication section sequentially multiplies the first parameters by the second parameters. A conversion section converts a multiplication value to correction data of each nozzle. A setting section sets the correction data in a memory.Type: ApplicationFiled: December 20, 2016Publication date: July 20, 2017Inventors: Noboru Nitta, Teruyuki Hiyoshi, Shunichi Ono
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Patent number: 9694577Abstract: In accordance with an embodiment, an inkjet head comprises a pressure chamber configured to house ink; an actuator configured to be arranged corresponding to the pressure chamber; a plate configured to have a nozzle communicating with the pressure chamber; and a driving circuit configured to drive the actuator, wherein the drive circuit applies an auxiliary pulse signal which contains an expansion pulse for expanding the volume of the pressure chamber and a contraction pulse for contracting the volume of the pressure chamber in such a degree as not to eject an ink drop from the nozzle to the actuator before enabling the ink drop to be ejected from the nozzle communicating with the pressure chamber by applying the expansion pulse and the contraction pulse as a drive pulse signals.Type: GrantFiled: July 6, 2016Date of Patent: July 4, 2017Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Noboru Nitta, Yasuhito Komai
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Publication number: 20170151778Abstract: An inkjet head contains a piezoelectric member which alternately includes plural first grooves and plural second grooves respectively constituted by a pair of side surfaces and a bottom surface; a first electrode on at least one of a pair of the side surfaces of each first groove; a second electrode on the side surface to face the first electrode across the piezoelectric member of each second groove; and a driving circuit including plural first drivers for each first electrode and inputting a common first driving waveform to each first electrode, and plural second drivers for each second electrode and inputting a second driving waveform of each second electrode corresponding to print data to each second electrode.Type: ApplicationFiled: September 12, 2016Publication date: June 1, 2017Inventors: Noboru Nitta, Shunichi Ono, Teruyuki Hiyoshi
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Patent number: 9630402Abstract: According to an embodiment, an ink jet head includes a discharge unit, a first storing unit, a second storing unit, a waveform generating unit, and a voltage applying unit. The discharge unit discharges ink according to the operation of an actuator. The first storing unit stores a pattern of a voltage to be applied to the actuator. The second storing unit stores a plurality of timer sets. The waveform generating unit generates, on the basis of the timer sets stored by the second storing unit and the voltage pattern stored by the first storing unit, a waveform of the voltage to be applied to the actuator. The voltage applying unit applies the voltage to the actuator on the basis of the waveform generated by the waveform generating unit.Type: GrantFiled: October 28, 2015Date of Patent: April 25, 2017Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Mamoru Kimura, Noboru Nitta, Teruyuki Hiyoshi, Shunichi Ono, Tomohisa Yoshimaru
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Patent number: 9573362Abstract: According to one embodiment, an ink jet head includes a discharge section, a control section that has a first receiving section, a setting section, a second receiving section, and a determination section, and a voltage applying section. The first receiving section receives setting data for setting a command code value corresponding to a command. The setting section sets the command code value with respect to the command based on the setting data received by the first receiving section. The second receiving section receives command data including the command code value. The determination section determines the command indicated by the command code value included in the command data that is received by the second receiving section based on the command code value set by the setting section. The voltage applying section applies a voltage to the actuator based on the command that is determined by the determination section.Type: GrantFiled: July 31, 2015Date of Patent: February 21, 2017Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Shunichi Ono, Noboru Nitta, Teruyuki Hiyoshi
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Publication number: 20170008278Abstract: An inkjet head comprises a pressure chamber into which ink is filled, a nozzle connected with the pressure chamber, an actuator which changes volume of the inside of the pressure chamber to eject an ink droplet from the nozzle connected with the pressure chamber, and a drive circuit which outputs a drive signal which contains an expansion pulse for increasing the volume of the pressure chamber and a contraction pulse for decreasing the volume of the pressure chamber when an ink droplet is ejected and outputs a precursor signal for changing the volume of the pressure chamber to a level at which the ink droplet is not ejected from the nozzle at the time of a precursor minute vibration for minutely vibrating ink.Type: ApplicationFiled: April 26, 2016Publication date: January 12, 2017Inventors: Teruyuki Hiyoshi, Noboru Nitta
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Publication number: 20170008280Abstract: In accordance with an embodiment, an inkjet head comprises a pressure chamber configured to house ink; an actuator configured to be arranged corresponding to the pressure chamber; a plate configured to have a nozzle communicating with the pressure chamber; and a driving circuit configured to drive the actuator, wherein the drive circuit applies an auxiliary pulse signal which contains an expansion pulse for expanding the volume of the pressure chamber and a contraction pulse for contracting the volume of the pressure chamber in such a degree as not to eject an ink drop from the nozzle to the actuator before enabling the ink drop to be ejected from the nozzle communicating with the pressure chamber by applying the expansion pulse and the contraction pulse as a drive pulse signals.Type: ApplicationFiled: July 6, 2016Publication date: January 12, 2017Inventors: Noboru Nitta, Yasuhito Komai
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Patent number: 9427956Abstract: In accordance with an embodiment, a drive method for an ink jet head comprising: a drive pulse, applying a first pulse for increasing and then restoring the volume of a pressure chamber and giving pressure vibration to the chamber in which ink are accommodated, and then a second pulse for reducing and then restoring the volume of the pressure chamber to an actuator arranged corresponding to the pressure chamber; wherein the second pulse is turned on at first point of time causing the pressure vibration amplitude at second point of time to be the same with that of generated by the first pulse when the first pulse is turned on, wherein the second point of time is the time when flow velocity of the ink nearby the nozzle inside the pressure chamber becomes 0 after the first point of time, and the second pulse is turned off at the second point of time.Type: GrantFiled: September 22, 2014Date of Patent: August 30, 2016Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHAInventors: Noboru Nitta, Takashi Norigoe
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Patent number: 9385296Abstract: An actuator is sequentially charged with output voltage “E/2” of a voltage source and output voltage “E” of a voltage source. After the charging, “Q/2” of electric charge “Q” stored in the actuator is discharged on a path returning to the voltage source. Subsequent to the discharging, the remaining all electric charge “Q/2” stored in the actuator is discharged on a closed circuit.Type: GrantFiled: May 15, 2014Date of Patent: July 5, 2016Assignee: TOSHIBA TEC KABUSHIKI KAISHAInventor: Noboru Nitta
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Publication number: 20160167378Abstract: In accordance with an embodiment, an inkjet head comprises an ejection section and a driving section. The ejection section ejects ink according to the operations of an actuator. In order to make the ejection section eject different amount of ink for different drops, the driving section applies voltage to the actuator of the ejection section such that the ejection section ejects ink continuously based on the printing data indicating the times the ejection section ejects ink and a position flag designating a drop frame number where ink starting to be ejected.Type: ApplicationFiled: December 11, 2015Publication date: June 16, 2016Inventors: Mamoru Kimura, Noboru Nitta, Teruyuki Hiyoshi
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Publication number: 20160136948Abstract: According to one embodiment, an apparatus for driving a capacitance-type actuator includes a first voltage source, a second voltage source, and a driver. The first voltage source outputs a first voltage to charge the capacitance-type actuator. The second voltage source outputs a second voltage to charge the actuator. The driver switches between first and second charges and first and second discharges. The first charge supplies the first voltage to the actuator. The second charge supplies the sum of the first voltage and the second voltage to the actuator. The first discharge emits a charge accumulated in the actuator and guides the charge to the second voltage source. The second discharge emits the charge accumulated in the actuator without guiding the charge to the second voltage source.Type: ApplicationFiled: January 8, 2016Publication date: May 19, 2016Inventor: Noboru NITTA
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Patent number: 9340011Abstract: According to one embodiment, a apparatus for driving a capacitance-type actuator includes a first voltage source, a second voltage source, and a driver. The first voltage source outputs a first voltage to charge the capacitance-type actuator. The second voltage source outputs a second voltage to charge the actuator. The driver switches between first and second charges and first and second discharges. The first charge supplies the first voltage to the actuator. The second charge supplies the sum of the first voltage and the second voltage to the actuator. The first discharge emits a charge accumulated in the actuator and guides the charge to the second voltage source. The second discharge emits the charge accumulated in the actuator without guiding the charge to the second voltage source.Type: GrantFiled: August 25, 2011Date of Patent: May 17, 2016Assignee: Toshiba Tec Kabushiki KaishaInventor: Noboru Nitta
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Publication number: 20160121606Abstract: According to an embodiment, an ink jet head includes a discharge unit, a first storing unit, a second storing unit, a waveform generating unit, and a voltage applying unit. The discharge unit discharges ink according to the operation of an actuator. The first storing unit stores a pattern of a voltage to be applied to the actuator. The second storing unit stores a plurality of timer sets. The waveform generating unit generates, on the basis of the timer sets stored by the second storing unit and the voltage pattern stored by the first storing unit, a waveform of the voltage to be applied to the actuator. The voltage applying unit applies the voltage to the actuator on the basis of the waveform generated by the waveform generating unit.Type: ApplicationFiled: October 28, 2015Publication date: May 5, 2016Inventors: Mamoru Kimura, Noboru Nitta, Teruyuki Hiyoshi, Shunichi Ono, Tomohisa Yoshimaru
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Patent number: 9302475Abstract: A driving device of an ink jet head including a plurality of ejection channels, including a plurality of driving waveform generation portions that are provided which respectively correspond to the plurality of ejection channels, a random number generation portion that generates a random number, and a connection portion. The driving waveform generation portions receive printing data and correction data, generate a driving signal of the ejection channels on the basis of the received printing data, correct a waveform of the driving signal by using the received correction data, and then output the corrected waveform to the correction data and to the corresponding ejection channels. The connection portion connects the random number generation portion of the driving waveform generation portions such that a random number is supplied to each of the driving waveform generation portions as correction data having a value independent for each of the driving waveform generation portions.Type: GrantFiled: August 22, 2013Date of Patent: April 5, 2016Assignee: Toshiba Tec Kabushiki KaishaInventors: Noboru Nitta, Teruyuki Hiyoshi, Mamoru Kimura, Tomohisa Yoshimaru