Patents by Inventor Takeshi Sakai

Takeshi Sakai 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).

  • Publication number: 20150093120
    Abstract: It is possible to suppress carrier light with a simple configuration when modulating the carrier light to generate optical sideband components. An optical carrier-suppressed signal generator includes first splitting means used to split input carrier light into two light beams, an optical modulator which modulates one split carrier light beam and outputs light including optical sideband components, a phase modulator which phase-modulates another split carrier light beam, and second or third splitting means used to split the output light of the optical modulator into two light beams. The output light split by the second or third splitting means and the output light of the phase modulator are multiplexed to obtain the amplitude of the signal waveform of optical power, and the optical modulator is controlled such that the obtained value is minimized.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 2, 2015
    Inventors: Takeshi Sakai, Masahito Mure, Junichiro Ichikawa
  • Publication number: 20150055043
    Abstract: In an IPS mode liquid crystal display device, a counter electrode is formed flat on a first insulating film. A second insulating film is formed in the peripheral portion of the counter electrode. A third insulating film is formed so as to cover the counter electrode and the second insulating film. A pixel electrode is formed on the third insulating film. The second and third insulating films are present between the pixel electrode and the counter electrode in the periphery of the pixel. The third insulating film is present between the pixel electrode and the counter electrode in the portion other than the peripheral portion of the pixel. An electric field between the pixel electrode and the counter electrode is smaller in the periphery of the pixel than in the vicinity of the center of the pixel, to prevent the occurrence of a domain in the periphery of the pixel.
    Type: Application
    Filed: August 13, 2014
    Publication date: February 26, 2015
    Inventors: Takeshi SAKAI, Toshimasa ISHIGAKI, Yasushi TOMIOKA
  • Publication number: 20140306644
    Abstract: An electric motor control device for performing tandem control for driving one movable component includes, for each electric motor, a position controller, a speed controller, and a current controller. Further, each electric motor also has a preload controller for adding a preload torque to a torque command Tm calculated by the speed controller, and to a torque command Ts calculated by the speed controller. The preload controller calculates a minimum necessary preload torque for eliminating backlash in accordance with a position of the movable component.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 16, 2014
    Applicant: OKUMA Corporation
    Inventors: Takeshi Sakai, Akiyoshi Satake
  • Publication number: 20140256065
    Abstract: There is provided an etching method. A temperature at a plurality of predetermined positions on an upper surface of an Si substrate is measured during the etching processing. The etching processing includes supplying an etching solution to the upper surface of the Si substrate. An exothermic reaction occurs in the etching processing. The upper surface is heated or cooled depending on the measured value.
    Type: Application
    Filed: May 20, 2014
    Publication date: September 11, 2014
    Applicant: Tohoku University
    Inventors: Takeshi Sakai, Tatsuro Yoshida, Kazuhiro Yoshikawa, Shigetoshi Sugawa
  • Publication number: 20140206274
    Abstract: Provided herein is an HVAC controller that receives blower volumes for different operating modes per HVAC zones, a HVAC system including the same and a method of operating the controller. In one embodiment, the controller includes: (1) an interface configured to receive blower volumes for each zone of the HVAC system that correspond to operating modes thereof of the HVAC system, wherein the blower volumes are received via a single graphical user interface and (2) a processor configured to direct operation of a circulation fan of the HVAC system based on at least one of the blower volumes.
    Type: Application
    Filed: June 28, 2013
    Publication date: July 24, 2014
    Inventors: Pete Hrejsa, Kyle Golden, Jay Charavda, Takeshi Sakai, Daniel Castillo
  • Publication number: 20140207258
    Abstract: A low energy environmental sensor is provided herein that is configured to receive user inputs from movement of the sensor itself. A method of operating a rocking environmental sensor is also provided. In one embodiment, the rocking environmental sensor includes: (1) a base having a fulcrum point and (2) a face including a first movement initiator area and a second movement initiator area configured to cause the face to toggle with respect to the fulcrum point and complete a signaling path indicating a user input.
    Type: Application
    Filed: June 28, 2013
    Publication date: July 24, 2014
    Inventors: Robert Anthony DiFulgentiz, III, Larry S. Bias, Thomas Gerard Pavlak, Kyle Golden, Takeshi Sakai, Daniel Castillo
  • Publication number: 20140202188
    Abstract: An HVAC system that obtains demand specific data from an outdoor unit thereof is provided. An indoor unit controller, an outdoor unit controller and an outdoor unit of the HVAC system are also disclosed. In one embodiment, the outdoor unit controller includes: (1) an interface configured to receive a request for a second portion of demand data from an indoor controller of the HVAC system, wherein the request includes a first portion of the demand data that corresponds to the second portion and (2) a processor configured to respond to the request by determining the second portion based on the first portion and sending the second portion of the demand data to the indoor controller of the HVAC system.
    Type: Application
    Filed: June 14, 2013
    Publication date: July 24, 2014
    Inventors: Pete Hrejsa, Takeshi Sakai
  • Patent number: 8670082
    Abstract: A thin film transistor, a display device and a liquid crystal display device are provided. The thin film transistor includes a gate electrode film onto which light from a light source is irradiated, a semiconductor film formed on the gate electrode film and on an opposite side to the light source side through an insulating film, first and second electrode films formed to be in electrical contact with the semiconductor film, and a first shielding film formed in a same layer as the gate electrode film and electrically isolated from the gate electrode film, wherein the first shielding film overlaps a part of the semiconductor film as seen from the light irradiation direction and also overlaps at least a part of the first electrode film as seen from the light irradiation direction.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: March 11, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takeshi Noda, Takuo Kaitoh, Hidekazu Miyake, Takeshi Sakai
  • Patent number: 8648976
    Abstract: A technique that can prevent breakdown of a thin film transistor due to static electricity is provided. A manufacturing method of a display device includes, in forming a plurality of thin film transistors constituting a drive circuit outside a display region as an assembly of pixels, forming a first wiring that is connected to gate electrodes of the thin film transistors to cause the thin film transistors to perform generating operation of a drive signal and a second wiring that connects gate electrodes of the thin film transistors adjacent to one another in the forming region of the drive unit in the same layer as the first wiring, and cutting the second wiring after forming the connected thin film transistors.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: February 11, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takeshi Sakai, Takuo Kaitoh
  • Publication number: 20140039654
    Abstract: An information providing system includes a sound emission device for emitting, as sound wave, identification information modulated into a sound signal, an identification information resolution server including a mapping table in which the identification information, valid time information and the address information of a content are stored to be associated, and a mobile terminal device for transmitting the identification information demodulated from a picked-up sound wave to the identification information resolution server thereby obtaining address information and accessing the content using the obtained address information. When received the identification information from the mobile terminal device, the identification information resolution server returns the address information of a corresponding content to the mobile terminal device when the time information is within a valid time.
    Type: Application
    Filed: March 28, 2012
    Publication date: February 6, 2014
    Applicant: YAMAHA CORPORATION
    Inventors: Hitoshi Akiyama, Hiroyuki Iwase, Takeshi Sakai, Takuro Sone
  • Publication number: 20140015541
    Abstract: In the electric field measuring device, a DC bias circuit applying a DC bias voltage to an optical intensity modulator is disposed in an area, and a DC bias control portion controlling a DC bias voltage is disposed outside the area. An electrical signal of a DC bias voltage which is output from the DC bias control portion is converted into an optical signal by an electrical-optical converter (E/O) so as to be introduced into the area via an optical fiber, and the optical signal is converted into an electrical signal by an optical-electrical converter (O/E) disposed in the area such that the electrical signal is input to the DC bias circuit.
    Type: Application
    Filed: March 14, 2012
    Publication date: January 16, 2014
    Applicant: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Takeshi Sakai, Masahito Mure
  • Patent number: 8624256
    Abstract: The present invention provides a display device which forms a drive circuit using a bottom-gate-type TFT made of poly-Si which generates a small leak current in a periphery of a display region. A gate electrode is made of Mo having a high melting point, and a gate insulation film is formed on the gate electrode. A channel layer constituted of a poly-Si layer is formed on the gate insulation film, and the poly-Si layer is covered with an a-Si layer. An n+Si layer is formed on the a-Si layer, and an SD electrode is formed on the n+Si layer. Although holes are induced in the poly-Si layer when a negative voltage (inverse bias) is applied to the gate electrode, the holes cannot pass through the a-Si layer and hence, no drain current flows. Accordingly, it is possible to realize a bottom-gate-type TFT using poly-silicon which generates a small leak current.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: January 7, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takuo Kaitoh, Hidekazu Miyake, Takeshi Sakai, Terunori Saitou
  • Patent number: 8576634
    Abstract: The degree of integration and the number of rewriting of a semiconductor device having a nonvolatile memory element are improved. A first MONOS nonvolatile-memory-element and a second MONOS nonvolatile-memory-element having a large gate width compared with the first MONOS nonvolatile-memory-element are mounted together on the same substrate, and the first MONOS nonvolatile-memory-element is used for storing program data which is scarcely rewritten, and the second MONOS nonvolatile-memory-element is used for storing processed data which is frequently rewritten.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: November 5, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Fumitoshi Ito, Yoshiyuki Kawashima, Takeshi Sakai, Yasushi Ishii, Yasuhiro Kanamaru, Takashi Hashimoto, Makoto Mizuno, Kousuke Okuyama, Yukiko Manabe
  • Publication number: 20130075877
    Abstract: A semiconductor device with a lateral element includes a semiconductor substrate, first and second electrodes on the substrate, and a resistive field plate extending from the first electrode to the second electrode. The lateral element passes a current between the first and second electrodes. A voltage applied to the second electrode is less than a voltage applied to the first electrode. The resistive field plate has a first end portion and a second end portion opposite to the first end portion. The second end portion is located closer to the second electrode than the first end portion. An impurity concentration in the second end portion is equal to or greater than 1×1018 cm?3.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 28, 2013
    Applicant: DENSO CORPORATION
    Inventors: Takeshi SAKAI, Akira Yamada, Shigeki Takahashi, Youichi Ashida, Satoshi Shiraki
  • Patent number: 8390048
    Abstract: For enhancing the high performance of a non-volatile semiconductor memory device having an MONOS type transistor, a non-volatile semiconductor memory device is provided with MONOS type transistors having improved performance in which the memory cell of an MONOS non-volatile memory comprises a control transistor and a memory transistor. A control gate of the control transistor comprises an n-type polycrystal silicon film and is formed over a gate insulative film comprising a silicon oxide film. A memory gate of the memory transistor comprises an n-type polycrystal silicon film and is disposed on one of the side walls of the control gate. The memory gate comprises a doped polycrystal silicon film with a sheet resistance lower than that of the control gate comprising a polycrystal silicon film formed by ion implantation of impurities to the undoped silicon film.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: March 5, 2013
    Assignee: Renesas Electronics Corporation
    Inventors: Takeshi Sakai, Yasushi Ishii, Tsutomu Okazaki, Masaru Nakamichi, Toshikazu Matsui, Kyoya Nitta, Satoru Machida, Munekatsu Nakagawa, Yuichi Tsukada
  • Patent number: 8384836
    Abstract: A liquid crystal display device having thin film transistors which can alleviate the required alignment accuracy of a semiconductor film while suppressing the generation of an optical leak current is provided.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Takeshi Sakai
  • Publication number: 20130045008
    Abstract: An electric field measuring apparatus measures electric field intensity of an electromagnetic wave generated from equipment under test installed in an area in which electromagnetic waves are detected. The apparatus includes an antenna, an RF amplifier amplifying an output signal of the antenna, a signal intensity detector detecting whether intensity of the output signal is higher than a predetermined level, a signal generator generating a detection result signal on the basis of a detection result of the signal intensity detector, a multiplexer multiplexing an output signal of the RF amplifier, the detection result signal, and a DC bias voltage, and an optical intensity modulator having a Mach-Zehnder type optical waveguide performing an optical modulation operation on the basis of an output signal of the multiplexer are arranged inside the area. Arranged outside the area are a light source unit, a receiver unit, a DC bias controller, and a display unit.
    Type: Application
    Filed: February 21, 2011
    Publication date: February 21, 2013
    Applicant: Sumitomo Osaka Cement Co.,Ltd.
    Inventors: Norikazu Miyazaki, Takeshi Sakai, Masahito Mure
  • Patent number: 8310611
    Abstract: Provided is a display device including: a gate electrode (GT); a semiconductor film (S) which controls a current flowing between a source electrode (ST) and a drain electrode (DT), the semiconductor film including a channel region and two impurity regions formed of regions which sandwich the channel region; two Ohmic contact layers (DS) being interposed between the source electrode and the like and the two impurity regions; and an insulating film laminated on a partial region of the semiconductor film, the partial region being around a position corresponding to a substantial center of the semiconductor film, in which: the semiconductor film is formed of one of microcrystalline-silicon and polycrystalline-silicon; the two impurity regions are formed in regions on which the insulating film is absent; the two Ohmic contact layers cover the two impurity regions therewith; and the source electrode and the like cover the Ohmic contact layers therewith.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: November 13, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takuo Kaitoh, Toshio Miyazawa, Takeshi Sakai
  • Publication number: 20120228624
    Abstract: The image display device according to the present invention is an image display device where a pixel unit and an external connection terminal unit are provided on a substrate (SUB), and the pixel unit and the external connection terminal unit are connected by an aluminum wire (LN), having; an organic protective film (OPAS) directly covering the aluminum wire, except a contact hole (CH) of the external connection terminal unit and part of the pixel unit; and an ITO film (ITO) provided on the upper side of the organic protective film so as to cover the aluminum wire, including the external connection terminal unit and reaching to the pixel unit.
    Type: Application
    Filed: March 1, 2012
    Publication date: September 13, 2012
    Inventors: Takeshi SAKAI, Daisuke Sonoda
  • Patent number: D706145
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: June 3, 2014
    Assignee: Lennox Industries Inc.
    Inventors: Thomas Gerard Pavlak, Robert Anthony DiFulgentiz, III, Kyle Golden, Larry Stephen Bias, Takeshi Sakai, Daniel Castillo