Patents Assigned to Citizen Watch Co., Ltd.
  • Patent number: 10468453
    Abstract: A light-emitting apparatus including a mother board, and LED packages mounted on the mother board is provided. Each of the LED packages includes: a package substrate; light-emitting regions on the package substrate, the light-emitting regions being rotationally symmetric and each including LED devices, wherein at least some of the light-emitting regions and the other light-emitting regions emit light of different colors; and sets of package electrodes on the package substrate around the light-emitting regions, the sets of package electrodes being rotationally symmetric, wherein the package electrodes of each set correspond to cathodes and anodes of the light-emitting regions capable of emitting light independently of each other. The mother board includes, for each LED package, a set of mother-board electrodes connected to one of the sets of package electrodes of the LED package.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: November 5, 2019
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Shingo Kuriki
  • Patent number: 10461232
    Abstract: A condensation reaction-type die bonding agent has little liability of poor electrical connection at the electrodes. A condensation reaction-type die bonding agent for bonding an LED device provided on its surface with device electrodes having connection surfaces covered by gold, where the die bonding agent includes (A) a polysilsesquioxane solid in state at room temperature having trisiloxy units (TA) expressed by R1SiO3/2 where, R1 indicates one group selected from the group comprised of C1 to C15 alkyl groups, a phenyl group, and a benzyl group, and having hydroxyl groups, (B) a polysilsesquioxane liquid in state at room temperature having trisiloxy units (TB) expressed by R2SiO3/2 where, R2 indicates one group selected from the group comprised of C1 to C15 alkyl groups, a phenyl group, and a benzyl group, and having —OR2 where, R2 indicates one group selected from the group comprised of C1 to C15 alkyl groups, a phenyl group, and a benzyl group, and (C) a condensation reaction catalyst.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: October 29, 2019
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN ELECTRONICS CO., LTD.
    Inventors: Hiroo Kajiwara, Yuji Ogawa, Kenichiro Sato, Yuta Yaguchi
  • Patent number: 10457077
    Abstract: Provided is a printer including a conveying unit conveying a continuous sheet in accordance with an input print instruction, a plurality of sensors detecting a mark serving as a reference for positioning a print area on the continuous sheet, wherein the plurality of sensors adopt marks different from each other as detection targets, a printing unit printing on a print area of the continuous sheet, a storage unit storing priority information about a sensor to be used preferentially among the plurality of sensors, and a control unit controlling the conveying unit so that the print area is positioned at a print position of the printing unit on the basis of the priority information and a detection result indicating whether each of the plurality of sensors has detected the mark or not during conveying of the continuous sheet while the priority information is stored in advance.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: October 29, 2019
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventor: Hiroshi Sakurai
  • Patent number: 10458328
    Abstract: A combustion pressure sensor has a case member with a joint surface on the side of a tip end and in which an opening portion is provided. A joint surface of a pressure reception member on which a combustion pressure acts is brought into planar contact with the joint surface of the case member so as to block the opening portion. A welding portion joins the joint surfaces to each other. A piezoelectric element stored in the case member converts a pressing force based on the combustion pressure transmitted from the pressure reception member into a signal. On the side of one edge side in at least the one joint surface, the one joint surface is limited to a given depth of welding from the other edge side. A predetermined clearance portion is provided so as to form a predetermined gap with the opposite joint surface and a welding portion is provided which includes at least all the limited joint surface from the other edge side in the one joint surface.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: October 29, 2019
    Assignees: CITIZEN FINEDEVICE CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Kazuo Takahashi, Yoshihiko Soga
  • Publication number: 20190302699
    Abstract: An electronic watch includes a power generating mechanism; a battery that is charged with power generated by the power generating mechanism; hands that include a second hand; a driving source that rotates the hands; a driving circuit that drives the driving source with power supplied by the battery; and a control circuit that controls the driving circuit. The control circuit executes a first stopping operation for stopping the driving circuit and the control circuit in a power saving mode for suppressing power consumption and when a first determination time elapses without any power being generated by the power generating mechanism. The control circuit executes a second stopping operation for stopping the driving circuit and the control circuit in the power saving mode and when a second determination time elapses while a voltage of the battery is at a level equal to or lower than a predetermined level.
    Type: Application
    Filed: March 26, 2019
    Publication date: October 3, 2019
    Applicant: CITIZEN WATCH CO., LTD.
    Inventors: Shogo KIMURA, Akinari TAKADA
  • Patent number: 10431721
    Abstract: Provided is a light-emitting device and a method for manufacturing the same which avoid a distinct color unevenness during the light emission even if variations are present among the light-emitting elements in the concentration of the phosphor that precipitates in the resin for sealing the light-emitting elements. The light-emitting device includes a substrate, a plurality of light-emitting elements that are mounted on the substrate, a first resin layer that integrally seals the light-emitting elements and includes a first phosphor that is excited by light from the light-emitting elements at a concentration that is high as it goes to a lower end near the substrate from an upper end distant from the substrate, and a second resin layer that is provided at an upper side of the first resin layer and includes a second phosphor that is excited by light from the light-emitting elements at a uniform concentration.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: October 1, 2019
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Sadato Imai, Tatsuya Katoh, Masahiro Watanabe, Kazuki Matsumura
  • Patent number: 10433381
    Abstract: An LED drive circuit in which a bright change of an LED is suppressed even if the voltage of a full-wave rectified waveform fluctuates is provided. The LED drive circuit includes a bridge rectifier circuit, an LED string made up by a plurality of LEDs being connected in series and supplied with a current from the bridge rectifier circuit, and a current limiting circuit that has a current input terminal and a current output terminal connected onto a path that starts from the bridge rectifier circuit and returns to the bridge rectifier circuit via the LED string, which limits a current that flows through the LED string to an upper limit current value or smaller, and further, which decreases the upper limit current value in accordance with the amount of rise in the voltage when the voltage at the current input terminal viewed from the current output terminal rises.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: October 1, 2019
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN ELECTRONICS CO., LTD.
    Inventors: Keisuke Sakai, Takashi Akiyama
  • Patent number: 10421302
    Abstract: A cover is coupled to a main body casing in manner enabling rotation of the cover. A pop-up mechanism is provided that when locking by a locking mechanism that fixes the cover at a closed position in a releasable manner is released, rotates the cover from the closed position to an open position by a biasing of first contact members in a direction so that the first contact members push second contact members that are respectively disposed at both ends of the cover, the first contact members being connected to each other and respectively disposed at both ends of the main body casing. Thus, the second contact members are pushed while a positional relationship of the first contact members is maintained to be constant.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: September 24, 2019
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN SYSTEMS JAPAN CO., LTD.
    Inventor: Hiroyuki Tsugaru
  • Patent number: 10424562
    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: Grant
    Filed: December 10, 2015
    Date of Patent: September 24, 2019
    Assignees: Citizen Electronics Co., Ltd., Citizen Watch Co., Ltd.
    Inventors: Yuki Suto, Jo Kinosita
  • Patent number: 10414009
    Abstract: This invention provides a machine tool that, in addition to sequentially separating a chip generated from a workpiece in a reliable manner, improves the roundness of the finished workpiece and improves the visual appearance and roughness of a machined surface of the workpiece, and a control apparatus of the machine tool. A machine tool or a control apparatus thereof includes a vibration frequency setting unit for setting vibration frequency of the reciprocal vibration with respect to one relative rotation when machining a workpiece so that the intersections of paths of a cutting tool during forward movement and backward movement are dispersed on a circumferential surface of the workpiece.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: September 17, 2019
    Assignee: Citizen Watch Co., Ltd
    Inventor: Ayako Kitakaze
  • Patent number: 10414010
    Abstract: In a machine tool and a control apparatus thereof, a repetitive movement unit is configured so that the cutting tool performs one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool and so that a rotation angle of the relative rotation between the workpiece and the cutting tool during relative movement at a second speed is smaller than a rotation angle of the relative rotation during relative movement at a first speed in one repetitive movement. This configuration limits degradation of machining efficiency when the cutting tool machines the workpiece by performing one repetitive movement with respect to multiple relative rotations between the workpiece and the cutting tool.
    Type: Grant
    Filed: September 3, 2018
    Date of Patent: September 17, 2019
    Assignees: Citizen Watch Co., Ltd., Citizen Machinery Co., Ltd.
    Inventors: Kazuhiko Sannomiya, Hitoshi Matsumoto, Nobuyoshi Imasaki
  • Patent number: 10401822
    Abstract: This start limiting device (1) is provided with a start prohibiting means (11) which prohibits starting a device (2) when movement of said device (2) is detected, and a start prohibition releasing means (14) which releases the prohibition by the start prohibiting means (11) on starting the device (2); when movement of said device (2) is detected, the start prohibiting means (11) prohibits starting the device (2) such that the prohibition on starting the device can be released by the start prohibition releasing means (14). This start limiting device (1) is provided with a command receiving means (12) which receives a prescribed command, and the start prohibition releasing means (14) is configured to release the prohibition on starting the device until it is determined that a prescribed time condition has been satisfied from the time that the command receiving means (12) receives the aforementioned command.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: September 3, 2019
    Assignees: CITIZEN WATCH CO., LTD., CITIZEN MACHINERY CO., LTD.
    Inventor: Takanori Shinohara
  • Patent number: 10390708
    Abstract: Provided is an optical measuring device that can properly detect a small amount of dental plaque, can be easily incorporated into a toothbrush, and has a simple configuration. The optical measuring device includes a plurality of light sources that irradiate a sample with light having a plurality of wavelengths different from each other, respectively, a detection unit that detects intensities of examined light generated when the sample is irradiated with the light having the plurality of wavelengths, and a control unit that calculates an amount of fluorescent substance to be measured, based on the intensities of the examined light detected by the detection unit in response to the light having the plurality of wavelengths.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: August 27, 2019
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Takaaki Nozaki
  • Patent number: D857525
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: August 27, 2019
    Assignee: Citizen Watch Co., Ltd.
    Inventor: Cheng Yu Kwong
  • Patent number: D858314
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: September 3, 2019
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Benjamin Cheng Chin Hoi, Leung Yau Kong
  • Patent number: D862251
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: October 8, 2019
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Toshinori Okazaki
  • Patent number: D862403
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 8, 2019
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Yasuo Nakanishi
  • Patent number: D865227
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: October 29, 2019
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Shingo Kuriki, Yutaro Misawa
  • Patent number: D866351
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: November 12, 2019
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Toshinori Okazaki
  • Patent number: D866352
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: November 12, 2019
    Assignee: CITIZEN WATCH CO., LTD.
    Inventor: Chau Hon Ming