Patents Assigned to Citizen Electronics Co., Ltd.
  • Patent number: 11450789
    Abstract: It is an object of the present invention to improve light source efficiency of “a light-emitting device capable of realizing a natural, vivid, highly visible and comfortable appearance of colors or an appearance of objects” already arrived at by adopting a spectral power distribution having a shape completely different from the shape of conventionally known spectral power distributions while maintaining favorable color appearance characteristics.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: September 20, 2022
    Assignee: CITIZEN ELECTRONICS CO., LTD.
    Inventor: Hideyoshi Horie
  • Patent number: 11342312
    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: August 20, 2019
    Date of Patent: May 24, 2022
    Assignees: Citizen Electronics Co., Ltd., Citizen Watch Co., Ltd.
    Inventors: Yuki Suto, Jo Kinosita
  • Patent number: 11306884
    Abstract: A planar light-emitting device having a linear light-emitter having a substrate extending in a predetermined direction, a first line and a second line including a plurality of light-emitting elements arranged along the predetermined direction on the substrate, the first line and the second line being arranged side by site along the predetermined direction with an interval, a first frame arranged on the substrate so as to surround the first line, a second frame arranged on the substrate so as to surround the second line, a first seal arranged inside the first frame for sealing the plurality of light-emitting elements, a second seal arranged inside the second frame for sealing the plurality of light-emitting elements, and a plurality of electrodes arranged on the substrate and electrically connected with the plurality of light-emitting elements, and a light guide plate having an incidence surface having a first flat portion facing to the first line, a second flat portion facing to the second line, a projecting
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: April 19, 2022
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Takashi Watanabe, Kazuya Ishihara
  • Patent number: 11270855
    Abstract: The movable contact body for a switch includes at least one movable contact having an upwardly convex leaf-spring shape, a cover member disposed so as to cover an upper surface of the movable contact, and a holding member disposed so as to face a lower surface of the movable contact, the holding member having a contact through-hole through which a top portion of the movable contact can pass.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: March 8, 2022
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Hiroto Isoda, Satoshi Okuma, Soichiro Amano, Ken Ito
  • Publication number: 20220056339
    Abstract: Phosphors include a CaAlSiN3 family crystal phase, wherein the CaAlSiN3 family crystal phase comprises at least one element selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb.
    Type: Application
    Filed: June 29, 2021
    Publication date: February 24, 2022
    Applicants: MITSUBISHI CHEMICAL CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE, NICHIA CORPORATION, CITIZEN ELECTRONICS CO., LTD.
    Inventors: Naoto HIROSAKI, Kyota UEDA, Hajime YAMAMOTO
  • Patent number: 11177423
    Abstract: Provided is a light-emitting device wherein short-wavelength light included in emitted white light is attenuated with a small increase in manufacturing cost and a small decrease in luminous flux. The light-emitting device includes a mount board, LED elements mounted on the mount board and emitting first light which is blue light or has a shorter wavelength than blue light, and a sealing resin containing phosphor particles and titanium-dioxide particles and filled on the mount board to integrally seal the LED elements, the phosphor particles being excited by the first light to emit second light. The first light and the second light are mixed and emitted as white light, and transmitting through the sealing resin causes the first light to be attenuated more than the second light by the titanium-dioxide particles.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: November 16, 2021
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Masahiro Watanabe, Masahide Watanabe
  • Patent number: 11145795
    Abstract: A light-emitting apparatus and a method for manufacturing the same are provided in which heat dissipation from an LED package to a heat sinking substrate is improved while electrical insulation therebetween is ensured. The light-emitting apparatus includes a circuit board having an opening, an LED package inserted into the opening from the back side of the circuit board and having an edge connected to the back side of the circuit board, and a heat sinking substrate disposed on the back side of the circuit board so as to be in contact with the LED package.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: October 12, 2021
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Koki Hirasawa, Nodoka Oyamada, Yuji Omori
  • Patent number: 11127544
    Abstract: A spring has a dome portion having a dome shape bulging convexly, an outer peripheral portion disposed along the entire periphery of the dome portion, first and second support portions disposed at both ends of the outer peripheral portion, a valley bending portion disposed between the dome portion and the outer peripheral portion, and bent concavely upward, a first crest bending portion disposed between the outer peripheral portion and the first support portion, and bent convexly upward, and a second crest bending portion disposed between the outer peripheral portion and the second support portion, and bent convexly upward, wherein the outer peripheral portion includes a first and second side end portions which are not connected with the first and second support portions, and the valley bending portion disposed between the dome portion and the first and second side end portions extends linearly or curved inwardly in a longitudinal direction.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: September 21, 2021
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Yoshihiro Yaginuma
  • Patent number: 11084980
    Abstract: Phosphors include a CaAlSiN3 family crystal phase, wherein the CaAlSiN3 family crystal phase comprises at least one element selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: August 10, 2021
    Assignees: MITSUBISHI CHEMICAL CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE, NICHIA CORPORATION, CITIZEN ELECTRONICS CO., LTD.
    Inventors: Naoto Hirosaki, Kyota Ueda, Hajime Yamamoto
  • Patent number: 11054700
    Abstract: To provide a backlight that reduces the number of LEDs used while facilitating the attempt to make the backlight smaller in thickness. On amount substrate (11), LEDs (13) are mounted in a square lattice arrangement. Over a portion near the center of each unit of the square lattice, protrusions (15) of a diffusion plate (14) are disposed. Among light emitted from the LEDs (13), light traveling in lateral directions between the mount substrate (11) and the diffusion plate (14) is captured by the protrusions (15). The captured light is refracted and reflected by the interfaces of the protrusions (15), and diffused due to diffusing particles, with the result that the light is turned into upward illumination light.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: July 6, 2021
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Takuma Horiuchi, Takumi Miyashita, Kiyokazu Watanabe
  • Patent number: 11003052
    Abstract: A mobile device including: at least an imaging element; and a light-emitting device that irradiates a subject in accordance with imaging of the imaging element, in which the light-emitting device includes a semiconductor light-emitting element, and the difference of the normalized spectral power distribution at a wavelength of 580 nm and a value B representing a difference between normalized spectral power distributions in a wavelength range from 540 nm to 610 nm and a wavelength range from 610 nm to 680 nm are appropriate values. By providing a wavelength control element, it is possible to improve the color reproducibility and the like of a captured image. The mobile device achieves both sensitivity improvement and color reproducibility in a trade-off relationship.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: May 11, 2021
    Assignee: CITIZEN ELECTRONICS CO., LTD.
    Inventors: Jo Kinoshita, Yuki Suto, Munetaka Itami, Kouichi Fukasawa, Makoto Arai
  • Patent number: 10959312
    Abstract: The present invention addresses an illumination system and an illumination method which make a space including a display item illuminated with VIVID lighting where Duv is greatly deviated negatively from zero not perceived as pale pinkish, and the issue is solved by an illumination system for illuminating a space where a display item is displayed, wherein the illumination system comprises a first light-emitting device mainly illuminating the display item and satisfying the predetermined conditions, and a second light-emitting device mainly illuminating a space other than the display item and satisfying the predetermined conditions.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: March 23, 2021
    Assignee: CITIZEN ELECTRONICS CO., LTD.
    Inventors: Koichi Fukasawa, Makoto Arai
  • Publication number: 20210062085
    Abstract: To provide a semiconductor light emitting device which is capable of accomplishing a broad color reproducibility for an entire image without losing brightness of the entire image. A light source provided on a backlight for a color image display device has a semiconductor light emitting device comprising a solid light emitting device to emit light in a blue or deep blue region or in an ultraviolet region and phosphors, in combination. The phosphors comprise a green emitting phosphor and a red emitting phosphor. The green emitting phosphor and the red emitting phosphor are ones, of which the rate of change of the emission peak intensity at 100° C. to the emission intensity at 25° C., when the wavelength of the excitation light is 400 nm or 455 nm, is at most 40%.
    Type: Application
    Filed: November 13, 2020
    Publication date: March 4, 2021
    Applicant: CITIZEN ELECTRONICS CO., LTD.
    Inventors: Byungchul HONG, Naoki SAKO, Naoto KIJIMA, Masahiko YOSHINO, Takashi HASE, Fumiko YOYASU, Kentarou HORIBE
  • Patent number: 10937607
    Abstract: An electronic switch includes a rubber sheet that includes a first surface, a second surface opposite to the first surface, and a convex portion on the first surface. The convex portion of the rubber sheet includes a semispherical shape.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: March 2, 2021
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Takahiro Arai
  • Patent number: 10930823
    Abstract: Described herein are light-emitting devices that incorporate at least one light-emitting element and that satisfy predetermined requirements, in which ?SSL(?) emitted from the light-emitting device satisfies predetermined conditions described herein.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: February 23, 2021
    Assignee: CITIZEN ELECTRONICS CO., LTD.
    Inventor: Hideyoshi Horie
  • Patent number: 10916389
    Abstract: A push switch which can have a small separation distance from a side surface of a mounting board, when it is mounted on the mounting board through a step, is disclosed. The push switch includes a substrate having a first surface on which a first fixed contact point and a second fixed contact point surrounding the first fixed contact point are formed, a second surface located opposite to the first surface, a third surface extending from the second surface to a corner in a direction perpendicular to the first surface, and a fourth surface extending from the corner parallel to the first surface, and a conductive movable contact point having a peripheral edge is in contact with the second fixed contact point, and a center contacted by the first fixed contact point when the movable contact point is pressed, and the corner includes a groove recessed with respect to at least one of the third surface and the fourth surface.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: February 9, 2021
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventor: Toyohiko Amano
  • Publication number: 20200396815
    Abstract: The present invention addresses an illumination system and an illumination method which make a space including a display item illuminated with VIVID lighting where Duv is greatly deviated negatively from zero not perceived as pale pinkish, and the issue is solved by an illumination system for illuminating a space where a display item is displayed, wherein the illumination system comprises a first light-emitting device mainly illuminating the display item and satisfying the predetermined conditions, and a second light-emitting device mainly illuminating a space other than the display item and satisfying the predetermined conditions.
    Type: Application
    Filed: April 20, 2017
    Publication date: December 17, 2020
    Applicant: Citizen Electronics Co., Ltd.
    Inventors: Koichi Fukasawa, Makoto Arai
  • Patent number: D904989
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: December 15, 2020
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Masahiro Watanabe, Shingo Kuriki, Kazuki Matsumura
  • Patent number: D911297
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: February 23, 2021
    Assignees: CITIZEN ELECTRONICS CO., LTD., CITIZEN WATCH CO., LTD.
    Inventors: Masahiro Watanabe, Shingo Kuriki, Kazuki Matsumura
  • Patent number: D956704
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: July 5, 2022
    Assignees: Citizen Electronics Co., Ltd., Citizen Watch Co., Ltd.
    Inventor: Ryo Wakuda