Patents by Inventor Seiichiro Takahashi

Seiichiro Takahashi 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: 7990835
    Abstract: An optical pickup apparatus is provided with an angle adjusting element. The angle adjusting element changes a propagation direction of luminous fluxes of four luminous flux regions set about an optical axis of the laser light, out of laser light reflected by a disc, and mutually disperses the luminous fluxes. A signal light region in which signal light only is present appears on a detecting surface of a photodetector. A sensor pattern for signal light is placed at a position irradiated with the signal light within this region. A sensor pattern for a spherical aberration detection is placed on an inner side of this region.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: August 2, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kenji Nagatomi, Katsutoshi Hibino, Seiichiro Takahashi
  • Patent number: 7969853
    Abstract: A servo objective lens and a recording/reproducing objective lens are commonly held on a holder. The servo objective lens and the recording/reproducing objective lens are integrally displaced, thereby pulling servo light onto a servo layer. Upon the pulling, focus positions of recording light and reproducing light follow a focus position of the servo light. As a result, the focus positions of recording light and reproducing light are set close to the servo layer. Thereafter, an optical element for displacing the focus positions of recording light and reproducing light in the optical axis direction is driven to pull the recording light and the reproducing light onto a targeted recording layer.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: June 28, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Morio Nakatani, Kenji Nagatomi, Yoshiyuki Matsumura, Seiichiro Takahashi
  • Publication number: 20110075545
    Abstract: An optical pickup device is provided with a spectral element which imparts diffraction in such a manner that four light fluxes of the first laser light are separated from each other, when a light flux of the first laser light and a light flux of the second laser light reflected on a recording medium having laminated recording layers and servo layers are divided into four by a first straight line in parallel to a converging direction by an astigmatism element, and a second straight line perpendicular to the first straight line, and that the four light fluxes of the first laser light propagate on an outer side than the light flux of the second laser light; and a photodetector including a first sensor group which receives the first laser light, and a second sensor group which receives the second laser light.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 31, 2011
    Applicant: SANYO Electric Co., Ltd.
    Inventors: Kenji Nagatomi, Seiichiro Takahashi
  • Publication number: 20110015033
    Abstract: The transmission controller performs a non-coordinated shift, in which the gear position of the subtransmission mechanism is modified from the second gear position to the first gear position at a higher speed than when the gear position of the subtransmission mechanism is modified by a coordinated shift while permitting a deviation between the through speed ratio and the target through speed ratio, instead of the coordinated shift when it is determined that the second speed kick down shift is to be performed.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 20, 2011
    Inventors: Ryousuke NONOMURA, Hiroyasu Tanaka, Takuichiro Inoue, Jouji Seki, Mamiko Inoue, Seiichiro Takahashi
  • Publication number: 20110015834
    Abstract: When a vehicle stops in a travel range, a transmission controller sets a subtransmission mechanism in a second speed interlocking condition in which a torque input into a continuously variable transmission is transmitted in a second gear position and both a frictional engagement element of a first gear position and a frictional engagement element of the second gear position are engaged, and when a predetermined condition is established while the vehicle is stationary, the transmission controller reduces an output shaft torque of the continuously variable transmission.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 20, 2011
    Inventors: Ryousuke NONOMURA, Hiroyasu Tanaka, Takuichiro Inoue, Jouji Seki, Mamiko Inoue, Norio Asai, Seiichiro Takahashi
  • Publication number: 20110015839
    Abstract: A control device for a vehicle continuously variable transmission 4 comprises a shift control means for controlling either of or both the speed ratio at the continuously variable transmission mechanism 20 and the gear position at the subtransmission mechanism 30 so as to adjust an overall speed ratio to a final speed ratio and a torque capacity control means for controlling the torque capacity at a disengagement-side frictional engagement element in the subtransmission mechanism 30 so as to sustain a torque capacity value substantially equal to zero in an inertia phase occurring during a process of adjusting the gear position at the subtransmission mechanism 30 from the first gear position to the second gear position when a negative torque is input to the vehicle continuously variable transmission 4.
    Type: Application
    Filed: July 15, 2010
    Publication date: January 20, 2011
    Inventors: Seiichiro Takahashi, Hiroyasu Tanaka, Ryousuke Nonomura, Jouji Seki, Takuichiro Inoue, Mamiko Inoue
  • Publication number: 20110015835
    Abstract: A control device for a vehicle continuously variable transmission 4 includes: final speed ratio setting means for setting an overall speed ratio of the continuously variable transmission mechanism 20 and the subtransmission mechanism 30 to be reached on the basis of an operating condition of the vehicle as a final speed ratio; shift control means for controlling the continuously variable transmission mechanism 20 and the subtransmission mechanism 30 such that the overall speed ratio aligns with the final speed ratio at a predetermined transient response; stagnation determining means for determining whether or not a stagnation period in which the overall speed ratio stops varying will occur during an upshift; and reduction control means for shortening a time required to advance to an inertia phase from a start of a shift in the subtransmission mechanism 30 following a determination that the stagnation period will occur.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 20, 2011
    Inventors: Seiichiro Takahashi, Hiroyasu Tanaka, Ryousuke Nonomura, Jouji Seki, Takuichiro Inoue, Mamiko Inoue
  • Publication number: 20110015837
    Abstract: A control device for a vehicle continuously variable transmission 4 comprises: inertia phase processing completing means for completing an instruction relating to inertia phase processing before an input rotation speed of the subtransmission mechanism 30 actually reaches an input rotation speed of the second gear position; and torque phase processing starting means for starting an instruction relating to torque phase processing, in which reception of an input torque of the subtransmission mechanism 30 is shifted from a disengagement side frictional engagement element to an engagement side frictional engagement element before the input rotation speed of the subtransmission mechanism 30 actually reaches the input rotation speed of the second gear position, after completing the instruction relating to the inertia phase processing.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 20, 2011
    Inventors: Seiichiro Takahashi, Hiroyasu Tanaka, Ryousuke Nonomura, Jouji Seki, Takuichiro Inoue, Mamiko Inoue
  • Publication number: 20110015840
    Abstract: A subtransmission mechanism 30 comprises a Ravigneaux planetary gear mechanism 31, a Low brake 32 and a High clutch 33, shifts between a first speed gear position in which the Low brake 32 is engaged whereas the High clutch 33 is disengaged and a second speed gear position in which the Low brake 32 is disengaged and the High clutch 33 is engaged. A minute slip is caused at the Low brake 32 and then terminated by engaging the High clutch 33. A value representing the engaging state variation such as an engaging time period and/or an engaging speed of the High clutch 33 is learned and the pressure of oil supplied during the engaging operation of the High clutch 33 is corrected based upon the learned value, thereby assuring a smooth shift operation by compensating for any inconsistency in the torque transmission characteristics of the High clutch 33.
    Type: Application
    Filed: July 14, 2010
    Publication date: January 20, 2011
    Inventors: Seiichiro TAKAHASHI, Hiroyasu TANAKA, Ryousuke NONOMURA, Jouji SEKI, Takuichiro INOUE, Mamiko INOUE
  • Publication number: 20110015836
    Abstract: A speed ratio of a continuously variable transmission mechanism 20 is increased when a speed ratio of a subtransmission mechanism 30 connected in series to the continuously variable transmission mechanism 20 is switched from a first speed to a second speed. When an excess rotation speed Nb obtained by subtracting a target rotation speed from an engine rotation speed Ne exceeds a determination value Nr1 during this shifting process, a rapid rotation increase in an internal combustion engine 1 is prevented by reducing a shift speed of the continuously variable transmission mechanism 20 (S105A).
    Type: Application
    Filed: July 14, 2010
    Publication date: January 20, 2011
    Inventors: Seiichiro TAKAHASHI, Hiroyasu Tanaka, Ryousuke Nonomura, Jouji Seki, Takuichiro Inoue, Mamiko Inoue, Hideaki Suzuki
  • Publication number: 20110015838
    Abstract: A continuously variable transmission 4 for a vehicle includes a variator 20 that modifies a speed ratio continuously and a subtransmission mechanism 30 that is connected in series to the variator 20 and applies a first speed and a second speed, which is higher than the first speed, selectively. When the vehicle is running under a low load/high speed upshift condition having a lower load or a higher speed than a normal upshift condition, the subtransmission mechanism 30 is upshifted from the first speed to the second speed at a lower vehicle speed than under the normal upshift condition, and as a result, both rotation variation in an internal combustion engine 1 accompanying upshifting of the subtransmission mechanism 30 and an increase in a fuel consumption amount of the internal combustion engine 1 due to the shift operation in the continuously variable transmission 4 are suppressed.
    Type: Application
    Filed: July 15, 2010
    Publication date: January 20, 2011
    Inventors: Seiichiro TAKAHASHI, Hiroyasu Tanaka, Ryousuke Nonomura, Jouji Seki, Takuichiro Inoue, Mamiko Inoue, Tatsuo Ochiai
  • Publication number: 20110011731
    Abstract: To provide a method for producing a method for producing a low-resistance and high-transmittance indium-oxide-based transparent conductive film readily obtained through crystallization, the method employing an amorphous film which can easily be patterned through etching with a weak acid.
    Type: Application
    Filed: March 28, 2008
    Publication date: January 20, 2011
    Applicant: MITSUI MINING & SMELTING CO., LTD
    Inventors: Seiichiro Takahashi, Norihiko Miyashita
  • Publication number: 20100248894
    Abstract: A continuously variable transmission includes a variator capable of varying a speed ratio continuously, and a subtransmission mechanism provided in series with the variator. On the basis of an operating condition of a vehicle, a transmission controller sets a destination through speed ratio, which is an overall speed ratio of the variator and the subtransmission mechanism to be realized in accordance with the operating condition, and controls the variator and the subtransmission mechanism on the basis thereof. When shifts are prohibited in the subtransmission mechanism, the destination through speed ratio is limited to a speed ratio range that can be realized only by a shift in the variator.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 30, 2010
    Inventors: Tateki JOZAKI, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue, Seiichiro Takahashi, Tasuo Ochiai, Masato Koga, Masaaki Uchida, Ryoji Kadono
  • Publication number: 20100248886
    Abstract: A continuously variable transmission includes a variator capable of varying a speed ratio continuously, and a subtransmission mechanism provided in series with the variator. When an actual through speed ratio passes a predetermined mode switch speed ratio, a transmission controller performs a coordinated shift in which a gear position of the subtransmission mechanism is changed and a speed ratio of the variator is varied in an opposite direction to a speed ratio variation direction of the subtransmission mechanism. When the rapid deceleration is determined to be underway, the transmission controller decreases a speed ratio variation amount of the variator in the direction of a High side accompanied by a downshift of the subtransmission mechanism compared with the coordinated shift.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 30, 2010
    Inventors: Tateki JOZAKI, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue, Seiichiro Takahashi, Tatsuo Ochiai, Masato Koga, Masaaki Uchida, Ryoji Kadono
  • Publication number: 20100248895
    Abstract: The transmission controller changes the gear position of the subtransmission mechanism and varies the speed ratio of the variator in an opposite direction to a speed ratio variation direction of the subtransmission mechanism when the actual through speed ratio passes a predetermined mode switch line. When the improvement in the shift response of the continuously variable transmission is determined to be required and the actual through speed ratio passes the mode switch line from a Low side to the High side, the transmission controller increases a shift speed of the subtransmission mechanism compared with a normal coordinated shift.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 30, 2010
    Inventors: Tateki Jozaki, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue, Seiichiro Takahashi, Tatsuo Ochiai, Masato Koga, Masaaki Uchida, Ryoji Kadono
  • Publication number: 20100248875
    Abstract: A transmission controller permits a 2-1 shift, in which a gear position of a subtransmission mechanism is changed from a second speed to a first speed, when an accelerator pedal has been depressed to or above a predetermined opening. The gear position of the subtransmission mechanism is changed from the second speed to the first speed when an actual through speed ratio passes a mode switch line from a High side to a Low side while the 2-1 shift is permitted in the subtransmission mechanism.
    Type: Application
    Filed: March 19, 2010
    Publication date: September 30, 2010
    Inventors: Tateki Jozaki, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue, Seiichiro Takahashi, Tatsuo Ochiai, Masato Koga, Masaaki Uchida, Ryoji Kadono
  • Publication number: 20100228454
    Abstract: In control apparatus and method for an automatic transmission, a gear shift state of a stepwise variable transmission mechanism is controlled to a target gear shift state by releasing a first engagement section according to a reduction in a capacity of the first engagement section and, simultaneously, by engaging a second engagement section according to an increase in the capacity of the second engagement section, in accordance with a torque inputted to the stepwise variable transmission mechanism and, during an inertia phase, either one of the first and second engagement sections functions as a gear shift state control side engagement section and the capacity of a gear shift state non-control side engagement section which is the other engagement section is increased when determining that it is impossible to make the gear shift state follow up the target gear shift state at the gear shift state control side engagement section.
    Type: Application
    Filed: February 25, 2010
    Publication date: September 9, 2010
    Inventors: Seiichiro Takahashi, Tatsuo Ochiai, Masaaki Uchida, Masato Koga, Ryoji Kadono, Tateki Jozaki, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue
  • Publication number: 20100228450
    Abstract: A control apparatus of an automatic transmission has an engagement part, a power-ON/OFF state judgment section and a control section controlling a capacity of the engagement part. The control section compares an actual input revolution speed difference absolute value of an absolute value of a difference between an input revolution speed when engaged and an actual input revolution speed with a target input revolution speed difference absolute value of an absolute value of a difference between the input revolution speed when engaged and a target input revolution speed, then a deviation is determined by subtracting the target input revolution speed difference absolute value from the actual input revolution speed difference absolute value. When the deviation is positive, the capacity is increased. When the deviation is negative, the capacity is reduced. When the deviation is zero, a previous capacity that is set before the comparison of the both absolute values is maintained.
    Type: Application
    Filed: February 25, 2010
    Publication date: September 9, 2010
    Inventors: Seiichiro TAKAHASHI, Tatsuo Ochiai, Masaaki Uchida, Masato Koga, Ryoji Kadono, Tateki Jozaki, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue
  • Publication number: 20100228449
    Abstract: A control system controls an automatic transmission. The automatic transmission comprises a stepwise variable transmission section that includes a plurality of frictional elements and establishes a desired speed by a shift change disengaging one of the frictional elements and engaging the other of the frictional elements and a continuously variable transmission section that establishes a desired speed continuously. The control system makes a speed change control of the continuously variable transmission section cooperate with a change of an input rotation speed of the stepwise variable transmission section.
    Type: Application
    Filed: February 25, 2010
    Publication date: September 9, 2010
    Inventors: Seiichiro TAKAHASHI, Masato Koga, Masaaki Uchida, Tatsuo Ochiai, Ryoji Kadono, Tateki Jozaki, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue
  • Publication number: 20100227736
    Abstract: A control apparatus for an automatic transmission includes a stepwise variable transmission mechanism; a power ON/OFF state judging section; and a shift control section configured to control the stepwise variable transmission mechanism to a target rotational speed by disengaging the first engagement portion and engaging the second engagement portion in accordance with a torque inputted to the stepwise variable transmission mechanism, the shift control section being configured to engage one of the first engagement portion and the second engagement portion which has a function to suppress a variation of an input rotational speed of the stepwise variable transmission mechanism which is generated by a switching of the power ON/OFF state when the power ON/OFF state is switched at the shift control of the stepwise variable transmission mechanism, and to disengage the other of the first engagement portion and the second engagement portion.
    Type: Application
    Filed: February 25, 2010
    Publication date: September 9, 2010
    Inventors: Seiichiro Takahashi, Tatsuo Ochiai, Masaaki Uchida, Masato Koga, Ryoji Kadono, Tateki Jozaki, Hideaki Suzuki, Ryousuke Nonomura, Mamiko Inoue