Patents by Inventor Hajime Homma

Hajime Homma 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).

  • Patent number: 10377241
    Abstract: Includes electric motor (330) driving driving wheel (610) , speed control unit (300) controlling driving of electric motor (330) based on instructed speed ?r*, brake control unit (400) controlling hydraulic brake (500) applying mechanical braking to an electromotive vehicle, speed sensor (340) detecting traveling speed ?r of the electromotive vehicle, and determination unit (200) determining whether the mechanical braking needs to be applied in response to the difference between instructed speed ?r* and traveling speed ?r, and controlling operation of brake control unit (400) based on the determination result. Determination unit (200) determines that mechanical braking needs to be applied when instructed speed ?r* indicates deceleration and traveling speed ?r is higher than instructed speed ?r* , and performs control so that brake control unit (400) works hydraulic brake (500).
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: August 13, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Shuji Inoue, Shinji Masuda, Ryouji Oonishi, Hajime Homma
  • Publication number: 20170355266
    Abstract: Includes electric motor (330) driving driving wheel (610) , speed control unit (300) controlling driving of electric motor (330) based on instructed speed ?r*, brake control unit (400) controlling hydraulic brake (500) applying mechanical braking to an electromotive vehicle, speed sensor (340) detecting traveling speed ?r of the electromotive vehicle, and determination unit (200) determining whether the mechanical braking needs to be applied in response to the difference between instructed speed ?r* and traveling speed ?r, and controlling operation of brake control unit (400) based on the determination result. Determination unit (200) determines that mechanical braking needs to be applied when instructed speed ?r* indicates deceleration and traveling speed ?r is higher than instructed speed ?r* , and performs control so that brake control unit (400) works hydraulic brake (500) .
    Type: Application
    Filed: August 28, 2017
    Publication date: December 14, 2017
    Inventors: Shuji INOUE, Shinji MASUDA, Ryouji OONISHI, Hajime HOMMA
  • Patent number: 8421713
    Abstract: It is an object to provide a driving method of a plasma display panel, whereby a dark contrast can be improved while suppressing an erroneous discharge. In a resetting step in a first unit display period, while a first reset pulse having a predetermined peak electric potential is applied to one of first row electrodes of row electrode pairs formed in the PDP, a second reset pulse having a peak electric potential smaller than that of the first reset pulse is applied to the other of the first row electrodes. In the resetting step in a second unit display period subsequent to the first unit display period, a second reset pulse is applied to each of the one and the other of the first row electrodes.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: April 16, 2013
    Assignee: Panasonic Corporation
    Inventors: Kazuo Yahagi, Mitsuhiro Ishizuka, Yuya Shiozaki, Shunsuke Itakura, Kazuhiro Kanai, Hajime Homma, Yoshichika Sato, Hikaru Takahashi
  • Publication number: 20120200543
    Abstract: It is an object to provide a driving method of a plasma display panel, whereby a dark contrast can be improved while suppressing an erroneous discharge. In a resetting step in a first unit display period, while a first reset pulse having a predetermined peak electric potential is applied to one of first row electrodes of row electrode pairs formed in the PDP, a second reset pulse having a peak electric potential smaller than that of the first reset pulse is applied to the other of the first row electrodes. In the resetting step in a second unit display period subsequent to the first unit display period, a second reset pulse is applied to each of the one and the other of the first row electrodes.
    Type: Application
    Filed: April 17, 2012
    Publication date: August 9, 2012
    Applicant: PANASONIC CORPORATION
    Inventors: Kazuo YAHAGI, Mitsuhiro ISHIZUKA, Yuya SHIOZAKI, Shunsuke ITAKURA, Kazuhiro KANAI, Hajime HOMMA, Yoshichika SATO, Hikaru TAKAHASHI
  • Patent number: 8237629
    Abstract: Disclosed is a method of driving a plasma display panel. In this method, one field corresponding to one image is divided into a plurality of sub-fields, and at least one second sub-field is arranged after a first sub-field. In the first sub-field, the method comprises a first step of forming wall charges with negative polarity near the scanning electrode and forming wall charges with positive polarity near the common electrode and the data electrode; a second step of adjusting an amount of the wall charges with negative polarity near the scanning electrode and an amount of the wall charges with positive polarity near the common electrode and the data electrode; a third step of generating a writing discharge in a selected display cell of the display cells; a fourth step of generating light emission for display; and a fifth step of erasing a part of the wall charges in the display cell which emits light in the fourth step.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: August 7, 2012
    Assignee: Panasonic Corporation
    Inventors: Hajime Homma, Mitsuhiro Ishizuka, Shinji Hirakawa, Shinya Tsuchida, Koji Hashimoto
  • Patent number: 7973741
    Abstract: When a discharge start voltage takes a normal value under the normal temperature, priming discharge starts at a time t1. In this case, at a time t3 that is later than the time t1 by a predetermined time t, a sustain driver control signal Ssud2 is raised to put a sustain electrode into the floating state to stop the priming discharge. When the discharge start voltage takes a higher value than usual under the high temperature, the priming discharge starts at a time t2. In this case, at a time t4 that is later than the time t2 by the predetermined time t, the sustain driver control signal Ssud2 is lowered to put the sustain electrode into the floating state to stop the priming discharge. With such a configuration, provided is a plasma display device capable of implementing excellent and stable display quality while maintaining constant, even if a discharge start voltage varies, the charge state in display cells after a priming period, and a drive method for such a plasma display device.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: July 5, 2011
    Assignee: Panasonic Corporation
    Inventors: Shinya Tsuchida, Shinji Hirakawa, Mitsuhiro Ishizuka, Koji Hashimoto, Hajime Homma
  • Patent number: 7940232
    Abstract: A driving method includes generating an address discharge in selected cells out of discharge cells and setting the selected cells to either an emission enable state or a non-emission state in an address period which is set in each subfield period. The driving method also includes generating sustaining discharge in discharge cells being set to the emission enable state by applying at least one discharge sustaining pulse P+ between a scanning electrode and a common electrode constituting each row electrode pair, in a discharge sustaining period following the address period. The driving method also includes decreasing the applied voltage between the scanning electrode and common electrode in steps when a final applied pulse P+ out of the discharge sustaining pulses falls.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: May 10, 2011
    Assignee: Panasonic Corporation
    Inventors: Takashi Mashita, Hajime Homma
  • Publication number: 20090219226
    Abstract: It is an object to provide a driving method of a plasma display panel, whereby a dark contrast can be improved while suppressing an erroneous discharge. In a resetting step in a first unit display period, while a first reset pulse having a predetermined peak electric potential is applied to one of first row electrodes of row electrode pairs formed in the PDP, a second reset pulse having a peak electric potential smaller than that of the first reset pulse is applied to the other of the first row electrodes. In the resetting step in a second unit display period subsequent to the first unit display period, a second reset pulse is applied to each of the one and the other of the first row electrodes.
    Type: Application
    Filed: August 7, 2008
    Publication date: September 3, 2009
    Applicant: PIONEER CORPORATION
    Inventors: Kazuo Yahagi, Mitsuhiro Ishizuka, Yuya Shiozaki, Shunsuke Itakura, Kazuhiro Kanai, Hajime Homma, Yoshichika Sato, Hikaru Takahashi
  • Publication number: 20090219229
    Abstract: When the temperature of a plasma display panel falls outside a predetermined temperature range or when the time during which the plasma display panel is used exceeds a predetermined time, the largest potential difference between one row electrode and the other row electrode is reduced in a second half of a reset step.
    Type: Application
    Filed: September 11, 2008
    Publication date: September 3, 2009
    Applicant: Pioneer Corporation
    Inventors: Hajime HOMMA, Yuichi Sakai, Ayuhiko Saito, Hideki Tanaka, Masanori Ishihara
  • Publication number: 20090102756
    Abstract: Disclosed is a method of driving a plasma display panel. In this method, one field corresponding to one image is divided into a plurality of sub-fields, and at least one second sub-field is arranged after a first sub-field. In the first sub-field, the method comprises a first step of forming wall charges with negative polarity near the scanning electrode and forming wall charges with positive polarity near the common electrode and the data electrode; a second step of adjusting an amount of the wall charges with negative polarity near the scanning electrode and an amount of the wall charges with positive polarity near the common electrode and the data electrode; a third step of generating a writing discharge in a selected display cell of the display cells; a fourth step of generating light emission for display; and a fifth step of erasing a part of the wall charges in the display cell which emits light in the fourth step.
    Type: Application
    Filed: December 12, 2008
    Publication date: April 23, 2009
    Inventors: Hajime Homma, Mitsuhiro Ishizuka, Shinji Hirakawa, Shinya Tsuchida, Koji Hashimoto
  • Patent number: 7482999
    Abstract: Disclosed is a method of driving a plasma display panel. In this method, one field corresponding to one image is divided into a plurality of sub-fields, and at least one second sub-field is arranged after a first sub-field. In the first sub-field, the method comprises a first step of forming wall charges with negative polarity near the scanning electrode and forming wall charges with positive polarity near the common electrode and the data electrode; a second step of adjusting an amount of the wall charges with negative polarity near the scanning electrode and an amount of the wall charges with positive polarity near the common electrode and the data electrode; a third step of generating a writing discharge in a selected display cell of the display cells; a fourth step of generating light emission for display; and a fifth step of erasing a part of the wall charges in the display cell which emits light in the fourth step.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: January 27, 2009
    Assignee: Pioneer Corporation
    Inventors: Hajime Homma, Mitsuhiro Ishizuka, Shinji Hirakawa, Shinya Tsuchida, Koji Hashimoto
  • Publication number: 20080284686
    Abstract: When a sustain discharge corresponding to the display light is repeatedly produced by applying a drive pulse to a PDP which includes a fluorescent layer in the discharge cells, the drive pulse waveform is adjusted in accordance with the total number of sustain discharges. Furthermore, an auxiliary pulse of the same polarity as that of the sustain pulse is applied to the column electrodes in a period from after the application of a final scan pulse in the address process until the application of a leading sustain pulse. A period from the final sustain pulse until the time of the application of the leading pixel data pulse which is applied first in the write address process of the one subfield of the subsequent frame is made 1 millisecond (msec) or more.
    Type: Application
    Filed: May 12, 2008
    Publication date: November 20, 2008
    Applicant: Pioneer Corporation
    Inventors: Takashi Mashita, Hajime Homma, Koji Hashimoto, Yuichi Sakai, Ayuhiko Saito, Mitsuhiro Ishizuka
  • Publication number: 20080284684
    Abstract: A plasma display device and a method for driving the plasma display device are provided, wherein deterioration in image quality in a period immediately after power-on can be restrained while improving dark contrast. When driving a PDP, by applying various drive pulses, that includes a phosphor layer containing a secondary electron emissive material in respective discharge cells, drive pulses having different pulse waveforms are generated in a period from power-on of the plasma display device to after a lapse of a predetermined period of time, and in a period after a lapse of the predetermined period of time.
    Type: Application
    Filed: May 13, 2008
    Publication date: November 20, 2008
    Applicant: Pioneer Corporation
    Inventors: Mitsuhiro ISHIZUKA, Mitsuyoshi Makino, Hajime Homma, Koji Hashimoto, Masanori Ishihara, Tsutomu Tokunaga, Tatsuya Sugimoto
  • Publication number: 20080238824
    Abstract: When a discharge start voltage takes a normal value under the normal temperature, priming discharge starts at a time t1. In this case, at a time t3 that is later than the time t1 by a predetermined time t, a sustain driver control signal Ssud2 is raised to put a sustain electrode into the floating state to stop the priming discharge. When the discharge start voltage takes a higher value than usual under the high temperature, the priming discharge starts at a time t2. In this case, at a time t4 that is later than the time t2 by the predetermined time t, the sustain driver control signal Ssud2 is lowered to put the sustain electrode into the floating state to stop the priming discharge. With such a configuration, provided is a plasma display device capable of implementing excellent and stable display quality while maintaining constant, even if a discharge start voltage varies, the charge state in display cells after a priming period, and a drive method for such a plasma display device.
    Type: Application
    Filed: May 28, 2008
    Publication date: October 2, 2008
    Inventors: Shinya TSUCHIDA, Shinji Hirakawa, Mitsuhiro Ishizuka, Koji Hashimoto, Hajime Homma
  • Publication number: 20080224954
    Abstract: A driving method includes generating an address discharge in selected cells out of discharge cells and setting the selected cells to either an emission enable state or a non-emission state in an address period which is set in each subfield period. The driving method also includes generating sustaining discharge in discharge cells being set to the emission enable state by applying at least one discharge sustaining pulse P+ between a scanning electrode and a common electrode constituting each row electrode pair, in a discharge sustaining period following the address period. The driving method also includes decreasing the applied voltage between the scanning electrode and common electrode in steps when a final applied pulse P+ out of the discharge sustaining pulses falls.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 18, 2008
    Applicant: Pioneer Corporation
    Inventors: Takashi MASHITA, Hajime Homma
  • Publication number: 20080218443
    Abstract: A driving method in which, when a sustain discharge is caused only at each discharge cell set in on-mode by applying a sustain pulse to each row electrode pair of a plasma display panel, the electric field between row electrodes of each row electrode pair can be intensified by applying an auxiliary pulse to each column electrode of the plasma display panel together with the sustain pulse.
    Type: Application
    Filed: March 6, 2008
    Publication date: September 11, 2008
    Applicant: PIONEER CORPORATION
    Inventors: Yuichi SAKAI, Hajime HOMMA, Ayuhiko SAITO, Takashi MASHITA, Koji HASHIMOTO
  • Publication number: 20080211795
    Abstract: A length of an addressing period in a first sub-field is made shorter as time from an end of a second sub-field which provides light emission just previously to the first sub-field in a frame including the first and second sub-fields to a start of the first sub-field decreases, and as the number of sustain pulses in the second sub-field increases.
    Type: Application
    Filed: February 15, 2008
    Publication date: September 4, 2008
    Inventor: Hajime HOMMA
  • Patent number: 7408531
    Abstract: When a discharge start voltage takes a normal value under the normal temperature, priming discharge starts at a time t1. In this case, at a time t3 that is later than the time t1 by a predetermined time t, a sustain driver control signal Ssud2 is raised to put a sustain electrode into the floating state to stop the priming discharge. When the discharge start voltage takes a higher value than usual under the high temperature, the priming discharge starts at a time t2. In this case, at a time t4 that is later than the time t2 by the predetermined time t, the sustain driver control signal Ssud2 is lowered to put the sustain electrode into the floating state to stop the priming discharge. With such a configuration, provided is a plasma display device capable of implementing excellent and stable display quality while maintaining constant, even if a discharge start voltage varies, the charge state in display cells after a priming period, and a drive method for such a plasma display device.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: August 5, 2008
    Assignee: Pioneer Corporation
    Inventors: Shinya Tsuchida, Shinji Hirakawa, Mitsuhiro Ishizuka, Koji Hashimoto, Hajime Homma
  • Patent number: 7355568
    Abstract: A length of an addressing period in a first sub-field is made shorter as time from an end of a second sub-field which provides light emission just previously to the first sub-field in a frame including the first and second sub-fields to a start of the first sub-field decreases, and as the number of sustain pulses in the second sub-field increases.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: April 8, 2008
    Assignee: Pioneer Corporation
    Inventor: Hajime Homma
  • Patent number: 7180482
    Abstract: A method for driving a plasma display panel in which any one of a scanning electrode and a sustaining electrode is shared by neighboring display cells interposed therebetween. At least one condition selected from the group consisting of a voltage of a sustaining pulse, a pulse width of a sustaining pulse, and a pulse applying interval of a sustaining pulse is changed in relation to a polarity of the sustaining pulse. The sustaining pulse is applied to the scanning electrode and sustaining electrode by a predetermined number with relation to an image data during a sustaining period.
    Type: Grant
    Filed: November 23, 2001
    Date of Patent: February 20, 2007
    Assignee: Pioneer Corporation
    Inventor: Hajime Homma