Patents Assigned to Citizen Electronics
  • Multifunction speaker
    Patent number: 7454031
    Abstract: A multifunction speaker has a frame made of an insulation material and having a cylindrical portion, a pair of supporting springs secured to the frame and to a magnetic circuit for supporting the magnetic circuit. The magnetic circuit comprises a pole piece having a center pole and a flange on which an annular magnet is mounted. The flange of the pole piece has a pair of positioning projections projected from a periphery of the flange for positioning the magnet.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: November 18, 2008
    Assignee: Citizen Electronics Co., Ltd.
    Inventors: Hiroo Kajiwara, Kazumi Miyamoto
  • LIGHT SOURCE APPARATUS AND DISPLAY APPARATUS HAVING THE SAME
    Publication number: 20080259244
    Abstract: The present invention provides a light source apparatus less costly, capable of being reduced in size and thickness and superior in light combining performance and a display apparatus having the light source apparatus. The light source apparatus has a plurality of light sources different in emission wavelength from each other and a prism sheet having a plurality of mutually parallel fine elongated prisms on at least one surface thereof. Lights from the light sources enter the prism sheet through a light entrance surface of the prism sheet at a predetermined angle and output from an exit surface thereof as color-mixed exiting light. A bandpass mirror is disposed between each light source and the prism sheet to transmit light in a wavelength region emitted from the associated light source and to reflect light in the other wavelength regions.
    Type: Application
    Filed: March 3, 2008
    Publication date: October 23, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventor: Koya Noba
  • OPTICAL MEMBER AND LIGHTING DEVICE HAVING THE SAME
    Publication number: 20080253117
    Abstract: An optical member (3) has an entrance bottom surface (6) opposed to LED chips (1) and the entrance bottom surface (6) is configured to receive light from the LED chips (1), an exit top surface (7) opposite to the entrance bottom surface (6) and the exit top surface (7) is configured to emit the light outside the optical member(3), and an outer peripheral side surface (8) disposed between the entrance bottom surface (6) and the exit top surface (7). The outer peripheral side surface (8) has a plurality of circumferentially extending grooves (9) each having a V-shaped sectional configuration. The grooves (9) are set at an angle at which the entered light can be totally reflected inwardly in the optical member (3).
    Type: Application
    Filed: April 4, 2008
    Publication date: October 16, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventor: Junji Miyashita
  • Backlight system
    Patent number: 7434977
    Abstract: A backlight system including a printed board, a plurality of light sources mounted on a surface of the printed board, a frame member disposed to surround the plurality of light sources, a plurality of through-holes provided in the printed board to reduce weight of the printed board, and a cover member disposed on the printed board to cover the plurality of through-holes, whereby accomplishing great reduction in weight of the printed board without lowering reflection efficiency of light emitted from the light sources and providing a backlight system capable of effectively using for a large liquid crystal display.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: October 14, 2008
    Assignee: Citizen Electronics Co., Ltd.
    Inventors: Koichi Fukasawa, Junji Miyashita
  • Electromagnetic exciter
    Patent number: 7436088
    Abstract: An electromagnetic exciter includes a magnetic circuit device composed of an outer yoke, a flat magnet arranged within the outer yoke, and an inner yoke mounted on the magnet, and a casing within which the magnetic circuit device is contained. The casing has a flat plate and a cylindrical wall. A magnetic gap is defined between the side wall of the outer yoke and the outer peripheral wall of the inner yoke. A voice coil is secured to the flat plate of the casing and inserted into the magnetic gap. A suspension extends between the cylindrical wall of the casing and the magnetic circuit device so that the magnetic circuit device is supported by the casing. An annular weight is secured around the outer yoke. The suspension has openings. The weight has projections loosely fitted within the openings.
    Type: Grant
    Filed: January 24, 2006
    Date of Patent: October 14, 2008
    Assignee: Citizen Electronics Co., Ltd.
    Inventor: Naoki Miura
  • DISPLAY APPARATUS
    Publication number: 20080218470
    Abstract: A display apparatus includes an image display body having a front surface that rewritably displays image information and a light unit that illuminates the front surface of the image display body. The light unit has a light source and a light-transmitting sheet-shaped first lighting member superimposed over the front surface of the image display body. The first lighting member receives light from the light source and emits the light toward the front surface of the image display body to illuminate the front surface.
    Type: Application
    Filed: March 7, 2008
    Publication date: September 11, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventors: Junji Miyashita, Kenichi Tsuruta, Akira Onikiri
  • LIGHT-EMITTING DIODE
    Publication number: 20080210968
    Abstract: A light-emitting diode includes: a light-transmitting substrate; a light-emitting element mounted on the upper surface of the light-transmitting substrate; and a light-transmitting resin that seals the light-emitting element. The outer surface of the light-transmitting resin is covered with a reflecting layer formed from a silver or aluminum thin film. The light emitted from the light-emitting element is reflected from the reflecting layer, and the reflected light is guided out from the lower surface of the light-transmitting substrate in an efficient manner with minimum wastage of light intensity, and thus, high luminance light can be emitted.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 4, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventor: Kazuya ISHIHARA
  • LIGHT-EMITTING DIODE
    Publication number: 20080203423
    Abstract: A light-emitting diode is provided which includes: a sheet-like substrate; a pair of electrode patterns formed to wrap round and cover substantially entire upper and lower surfaces of the substrate, said pair of electrode patterns comprising an upper electrode portion, a lower electrode portion and a side electrode portion; a light-emitting element mounted on at least one of the electrode patterns; and a translucent sealing resin body that seals the light-emitting element. The pair of electrode patterns are separated by spaces formed therebetween, and substantially the entire surfaces of the substrate, except the spaces, are covered with the electrode patterns.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 28, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventor: Junji MIYASHITA
  • LIGHT-EMITTING DIODE
    Publication number: 20080186714
    Abstract: A light-emitting diode including a substrate provided with a pair of electrodes, a light-emitting element mounted on the substrate and electrically connected to the pair of electrodes, and a junction being in the light-emitting element, the substrate including a mirror surface on at least a position where the light-emitting element is mounted, the light-emitting element including an upper surface which acts as an emission surface, side surface and a lower surface, the lower surface of the light-emitting element being adhered to the mirror surface of the substrate by a light-transmitting adhesive, the side surfaces of the light-emitting element being covered by a resin having a diffusion-reflection effect, the emission surface of the light-emitting element, the junction and the mirror surface of the substrate being disposed in parallel with each other.
    Type: Application
    Filed: January 30, 2008
    Publication date: August 7, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventor: Makoto NAGAYAMA
  • LIGHT-EMITTING DIODE AND METHOD FOR PRODUCING IT
    Publication number: 20080185605
    Abstract: An LED includes a circuit board (1), a light emitter (3) mounted on the circuit board (1), and a reflector (4) mounted on the circuit board (1), the light emitter (3) including an LED element mounted on the circuit board (1) and a light-transmitting resin (2) to seal the LED element. The reflector (4) is configured to surround the light emitter (3) and includes an opening (5) which passes through an upper surface and a lower surface is provided at a central position to allow insertion of the light emitter (3), and an inclined inner surface in the opening (6) configured to be upwardly broadened. A reflection film (7) is provided on the inclined inner surface (6) of the opening in the reflector. A outer peripheral edge is a non-reflection film constituted area (8) and, simultaneously, a terminal position identification mark (10) adjacent to the non-reflection film constituted area (8) are provided.
    Type: Application
    Filed: January 15, 2008
    Publication date: August 7, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventors: Takahiro WADA, Satoru Kikuchi
  • SEMICONDUCTOR LIGHT-EMITTING DEVICE
    Publication number: 20080179617
    Abstract: A semiconductor light-emitting device includes: a printed-wiring board 3; a light-emitting diode element 2 mounted on the printed-wiring board 3; and a resin body for sealing the light-emitting diode element 2. The resin body is composed of a first resin body 7 arranged around the light-emitting diode element 2, and a second resin body 8 which seals the light-emitting diode 2 and the first resin body 7. An upper edge of the first resin body 7 disposed at a lower position of the junction is configured to be at least on or beyond an imaginary line that connects the junction and a lower edge of the second resin body.
    Type: Application
    Filed: January 18, 2008
    Publication date: July 31, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventors: Norikazu KADOTANI, Atsushi Nishida, Koichi Fukasawa, Hirohiko Ishii
  • Optical member, backlight unit and display apparatus having the same
    Publication number: 20080158476
    Abstract: An optical member having high directivity in a direction perpendicular to an exit surface thereof includes a transparent lens layer (3) having a front surface (exit surface) and a back surface and having a plurality of convex lenses on the front surface. A light-absorbing layer (4) and a light-reflecting layer (5) are successively stacked on the back surface of the transparent lens layer. A plurality of optical windows (6) extend through the light-absorbing and light-reflecting layers in the direction of stacking of the light-reflecting layer, the light-absorbing layer and the transparent lens layer so as to align with the convex lenses, respectively. The convex lenses have one common focal plane located outside the optical member. The focal plane is adjacent and parallel to the light-reflecting layer.
    Type: Application
    Filed: December 5, 2007
    Publication date: July 3, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventor: Junji Miyashita
  • Light emitting package, surface light-emitting device and display apparatus having the same
    Publication number: 20080158475
    Abstract: A light-emitting package allowing light to enter a thin lightguide plate efficiently has a package substrate 11, light-emitting elements 2 mounted on the package substrate, a transparent resin part 12 sealing the light-emitting elements on the package substrate, a cut portion 12a formed in the transparent resin part in parallel to the package substrate so as to be able to receive a side edge surface of a lightguide plate, and a reflecting layer 13 formed on the entire surface of the transparent resin part except the cut portion.
    Type: Application
    Filed: December 5, 2007
    Publication date: July 3, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventors: Junji Miyashita, Takumi Miyashita
  • SHEET SWITCH MODULE
    Publication number: 20080151526
    Abstract: A sheet switch module (21) including a circuit board (22), at least one key switch (25) mounted on one surface of the circuit board (22), a light-guiding sheet unit (30) covering one surface of the key switch (25), at least one LED (26) mounted on the circuit board (22) to enter light into the light-guiding sheet unit (30), the light-guiding sheet unit (30) being formed by a plurality of light-guiding sheets (31,32) at least parts of which are overlapped, the key switch (25) being illuminated by the LED (26) by way of plurality of light-guiding sheets (31,32).
    Type: Application
    Filed: December 14, 2007
    Publication date: June 26, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventors: Isao MIYASHITA, Kenshi Aihara
  • LIGHT SOURCE UNIT, BACKLIGHT UNIT AND DISPLAY APPARATUS HAVING THE SAME
    Publication number: 20080151142
    Abstract: A light source unit capable of obtaining white light with reduced color irregularity includes a plurality of light-emitting diodes (25R, 25G and 25B) having different emission spectrum peak wavelengths, and a light mixing member (21) that receives lights from the light-emitting diodes through an entrance surface (21a) and that allows lights to mix together before exiting through an exit surface (21b). The light mixing member (21) has anisotropic diffusing elements (22) that diffuse incident lights from the light-emitting diodes in a specific plane to effect light mixing.
    Type: Application
    Filed: December 17, 2007
    Publication date: June 26, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventor: Koya Noba
  • Multifunction speaker
    Patent number: 7386138
    Abstract: A multifunction speaker comprises a frame made of an insulation material and having a terminal supporting portion, a pair of supporting springs are partly embedded in the frame. A magnetic circuit is resiliently supported in the frame by the springs, a diaphragm is secured to the frame, a coil is secured to the diaphragm, an upper metal protector and a lower metal protector are set on the frame. The upper and lower protectors are secured to each other so as to shield the frame except the terminal supporting portion of the frame, a pair of terminals are provided on the terminal supporting portion, each of the terminals is connected to an end of the coil, and a ground terminal is provided on the terminal supporting portion and is connected to either of the upper and lower protectors.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: June 10, 2008
    Assignee: Citizen Electronics Co., Ltd.
    Inventors: Hiroo Kajiwara, Kazumi Miyamoto
  • LIGHT GUIDE PLATE, METHOD OF MANUFACTURING LIGHT GUIDE PLATE AND BACKLIGHT UNIT with the LIGHT GUIDE PLATE
    Publication number: 20080130317
    Abstract: An edge-light type light guide plate (30) is provided that has a first surface (31) and a second surface (32) that are opposed to each other, and a peripheral edge surface extending between the peripheral edges of the first and second surfaces. A part of the peripheral edge surface is defined as a light entrance plane (30a). The first surface (31) has a series of parallel elongated raised surfaces (31a) of arcuate cross-section that extend in a direction substantially normal to the light entrance plane (30a). The second surface (32) has a series of parallel elongated recessed surfaces (32a) of triangular cross-section that extend in a direction substantially normal to the elongated raised surfaces (31a) on the first surface.
    Type: Application
    Filed: August 22, 2007
    Publication date: June 5, 2008
    Applicant: Citizen Electronics Co., Ltd.
    Inventors: Takashi Shimura, Daisaku Okuwaki
  • Light-emitting diode
    Patent number: D574791
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: August 12, 2008
    Assignee: Citizen Electronics Co., Ltd.
    Inventor: Arata Shimozawa
  • Light-emitting diode for illuminating an object
    Patent number: D575243
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: August 19, 2008
    Assignee: Citizen Electronics Co., Ltd.
    Inventors: Sadato Imai, Masayoshi Kanamori
  • Light-emitting diode unit for illuminating an object
    Patent number: D575246
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: August 19, 2008
    Assignee: Citizen Electronics Co., Ltd.
    Inventors: Takeshi Fuwa, Sadato Imai