Patents Assigned to Citizen Holdings Co., Ltd.
  • Patent number: 9395692
    Abstract: A hairspring material for a mechanical timepiece includes an alloy which contains 37.5 to 39.5% by mass of Ni, 9.2 to 9.9% by mass of Cr, 0.35 to 0.55% by mass of Ti, and 0.6 to 0.9% by mass of Be, based on the total amount of the alloy, and contains in the remainder Fe and unavoidable impurities, the alloy being an alloy containing, as the unavoidable impurities, C (carbon), Mn in an amount of more than 0% by mass but not more than 0.5% by mass and Al in an amount of more than 0% by mass but less than 0.03% by mass, the amount of the C (carbon) being limited to not more than 0.03% by mass. The hairspring material can provide a smaller variation in Young's modulus than that of conventional hairspring materials.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: July 19, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN WATCH CO., LTD., HITACHI METALS, LTD., HITACHI METALS NEOMATERIAL, LTD.
    Inventors: Yoshirou Hirai, Shinichi Matsumoto, Kenji Tsuchiya, Shinji Yamamoto
  • Patent number: 9396362
    Abstract: Provided is a technology capable of preventing arithmetic operation accuracy from deteriorating even when a bipolar transistor used to form a Gilbert multiplier core has poor characteristics. A correction current generating circuit (3) uses a constant current source (301) to feed a constant current I0 to an emitter of a bipolar transistor (Q7) being a first replica transistor having the same current gain ? as bipolar transistors (Q1 to Q4) that form the Gilbert multiplier core (101), to generate a current of ?·I0 on a collector side thereof. The current is output as a correction current ?·I0, and is added to each of one of input signals (±K1·Vy) of the Gilbert multiplier core (101) as a bias current, to thereby eliminate influence of the current gain ? on an output signal being a multiplication result.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: July 19, 2016
    Assignee: CITIZEN HOLDINGS CO., LTD.
    Inventor: Yoichi Nagata
  • Patent number: 9395054
    Abstract: In a first aspect of the present inventive subject matter, a light source includes a substrate that includes a first electrode and a second electrode, and light-emitting elements arranged in an area and divided into groups each including a same number N of light-emitting elements that are electrically connected to one another in series in each group of the groups and that are electrically connected in series to the first electrode and to the second electrode of the substrate, and the light-emitting elements include a first light-emitting element that is configured to start emitting light when a voltage applied to the light-emitting elements exceeds a first voltage value, and the light-emitting elements except the first light-emitting element are configured to start emitting light when the voltage exceeds a second voltage value that is higher than the first voltage value. Also, a lighting device including the light source is disclosed.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: July 19, 2016
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN HOLDINGS CO., LTD.
    Inventors: Takakazu Yano, Tsuyoshi Miura
  • Patent number: 9391050
    Abstract: The purpose of the present invention is to provide a double-sided light emitting type semiconductor light emitting device that can be easily fabricated even if a semiconductor light emitting element is flip-chip mounted, and to provide a fabrication process for the same. The semiconductor light emitting device has a plurality of lead frames, a plurality of semiconductor light emitting elements connected to the plurality of lead frames, and a covering member that covers the plurality of semiconductor light emitting elements. The semiconductor light emitting device is characterized in that the edge of one lead frame among the plurality of lead frames is disposed in close proximity to the edge of another lead frame so as to form a gap, and the plurality of semiconductor light emitting elements are flip-chip mounted on the front surface and rear surface of the one lead frame and the other lead frame so as to straddle the gap.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: July 12, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN ELECTRONICS CO., LTD.
    Inventors: Kenji Imazu, Yuzuru Wada
  • Patent number: 9387687
    Abstract: An image forming device and method are provided which reduce erroneous detection of a border between transfer material areas when forming a new image by using unused portions of partially used transfer material areas. The image forming device forms an image having a first size or a second size which is one-half of the first size or smaller on a recording medium by transferring transfer materials respectively for transfer material areas, while feeding a strip-shaped transfer medium on which the transfer material areas each having the first size and respectively corresponding to the transfer materials are repeatedly arranged in a predetermined sequence in the longitudinal direction thereof.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: July 12, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventors: Masao Yoshizawa, Hirotaka Kamiya, Keiji Matsumura
  • Publication number: 20160197253
    Abstract: Provided is an LED device presenting minimal risk of bottom-surface contamination even when foreign substances such as liquids adhere thereto. The LED device has an LED die, a submount substrate on the surface of which the LED die is mounted, a frame-shaped electrode disposed along the outer circumferential part of the bottom surface of the submount substrate, and an inner-side electrode surrounded by the frame-shaped electrode and connected to the electrode of the LED die. In the LED device, the frame-shaped electrode is disposed along the entire outer circumferential part of the bottom surface. In an LED device, the bottom surface is rectangular, and the frame-shaped electrode is disposed along three sides of the bottom surface.
    Type: Application
    Filed: June 23, 2014
    Publication date: July 7, 2016
    Applicants: CITIZEN HOLDINGS CO., LTD., CITIZEN ELECTRONICS CO., LTD.
    Inventors: Isao Miyashita, Taku Kumasaka, Keita Watanabe, Kosuke Tsuchiya
  • Patent number: 9383573
    Abstract: A phase modulation device corrects wave front aberrations generated by an optical system including an objective lens disposed on an optical path of a light flux. The phase modulation device includes a phase modulation element which includes a plurality of electrodes, and modulates the phase of the light flux in accordance with a voltage applied to each electrode, and a control circuit which controls the voltage to be applied to each electrode. The control circuit controls the voltage to be applied to each electrode in such a manner that the light flux is imparted with a phase modulation amount in accordance with a phase modulation profile having a polarity opposite to the polarity of a phase distribution to be determined according to a relational equation representing a relationship between a numerical aperture of the objective lens and a ratio between third-order spherical aberration and fifth-order spherical aberration.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: July 5, 2016
    Assignee: CITIZEN HOLDINGS CO., LTD.
    Inventors: Kenji Matsumoto, Ayano Tanabe, Masafumi Yokoyama, Nobuyuki Hashimoto, Makoto Kurihara
  • Patent number: 9383061
    Abstract: A drive regulation device for a machine tool that stops driving of a motor when a door (18) provided for a cover (17) for covering a driven body driven by the motor becomes to be in an open state includes a detection unit (21) detecting an open/closed state of the door (18) provided for the cover (17) for covering the driven body driven by the motor, an excitation operation unit (22) switching the motor between an excitation state and a non-excitation state, a speed regulation unit (23) stopping the motor, when the motor that has been stopped is rotated faster than a predetermined allowable rotation speed, and a speed-regulation switch unit (24) controlling the speed regulation unit (23), in a case where the detection unit (21) detects that the door (18) is in the open state, such that the speed regulation unit (23) works when the motor is in the excitation state, and the speed regulation unit (23) does not work when the motor is in the non-excitation state.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: July 5, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Hitoshi Matsumoto
  • Patent number: 9380657
    Abstract: The purpose of the invention is to obtain, with a simple circuit configuration, an LED illumination device having an LED column driven by a pulsating voltage, capable of lighting with little flicker, and also having lighting control capability. The LED illumination device (400) comprises: an LED column (210) including a plurality of LEDs (211) connected in series; a rectifier (460) receiving an AC power supply (202) and outputting a pulsating voltage to the LED column (210); a current limit circuit (420) connected to the LED column (210) in series and having resistor elements (424 to 426); and a control circuit (250) for controlling the current flowing through the LED column (210) by controlling the resistor elements (424 to 426) and thereby controlling the lighting of the LED column (210).
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: June 28, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN ELECTRONICS CO., LTD.
    Inventors: Takashi Akiyama, Rintaro Takahashi, Keisuke Sakai
  • Publication number: 20160172550
    Abstract: A light emitting device includes a light emitting element including electrodes on its under face, a phosphor cover attached to the light emitting element so as to cover a top face and a side face of the light emitting element, and a reflection frame including a side face holding periphery of the phosphor cover and a tilted face tilting from the side face to the outside and upward.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 16, 2016
    Applicants: CITIZEN ELECTRONICS CO., LTD., CITIZEN HOLDINGS CO., LTD.
    Inventors: Yuki Suto, Jo Kinosita
  • Publication number: 20160169460
    Abstract: A light emitting device includes a first light emitting element, a second light emitting element, a first phosphor sheet containing a first phosphor and a third phosphor, and covering a top face of the first light emitting element, and a second phosphor sheet containing a second phosphor and a fourth phosphor, and covering a top face of the second light emitting element, wherein a peak wavelength of light which is wavelength-converted by the first phosphor or the third phosphor is equal to or less than a peak wavelength of light which is wavelength-converted by the second phosphor or the fourth phosphor.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 16, 2016
    Applicants: CITIZEN ELECTRONICS CO., LTD., CITIZEN HOLDINGS CO., LTD.
    Inventors: Yuki Suto, Jo Kinosita
  • Patent number: 9368707
    Abstract: To provide a mounting substrate wherein insulation resistance of a metal substrate having an oxide film formed on the surface thereof is ensured, and light reflectance is improved by preventing a light-reflecting material contained in a reflection layer from diffusing into a surface of the metal substrate. A mounting substrate includes a metal substrate (21), and a surface layer section (22) formed on an upper surface of the metal substrate (21). The surface layer section (22) includes an oxide film layer (23) formed on a surface of the metal substrate (21), a barrier layer (24) formed on the oxide film layer (23), a reflection layer (25) formed on the barrier layer (24) and containing a light-reflecting material, and a protection film layer (26) formed on the reflection layer (25).
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 14, 2016
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN HOLDINGS CO., LTD.
    Inventor: Sadato Imai
  • Patent number: D758885
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: June 14, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Marie Yoshida
  • Patent number: D758886
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: June 14, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Maiko Kimura
  • Patent number: D759504
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: June 21, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Satoshi Sugiura
  • Patent number: D761902
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: July 19, 2016
    Assignees: Citizen Holdings Co., Ltd, Citizen Systems Japan co., Ltd
    Inventor: Kazuya Matsumoto
  • Patent number: D761903
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: July 19, 2016
    Assignees: Citizen Holdings Co., Ltd, Citizen Systems Japan Co., Ltd
    Inventor: Kazuya Matsumoto
  • Patent number: D761904
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: July 19, 2016
    Assignees: Citizen Holdings Co., Ltd, Citizen Systems Japan Co., Ltd
    Inventor: Kazuya Matsumoto
  • Patent number: D762126
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: July 26, 2016
    Assignees: CITIZEN HOLDINGS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Takashi Izuka
  • Patent number: D762182
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: July 26, 2016
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN HOLDINGS CO., LTD.
    Inventors: Takashi Akiyama, Shigehisa Watanabe, Yuki Ochiai, Satoshi Goto, Tatsuro Yamada, Yuki Nishikawa