Patents by Inventor Kentaro Kamada

Kentaro Kamada 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).

  • Patent number: 11054382
    Abstract: A sensor includes a pump cell and a reference cell generating voltage Vs or current. The pump cell includes a pump cell first electrode and a pump cell second electrode. The surface of the pump cell first electrode includes a noble metal region formed of a noble metal, a ceramic region, and a coexistence region in which the noble metal and the ceramic material coexist. The width of the coexistence region in an A region of the surface of the pump cell first electrode is greater than the width of the coexistence region in a B region of the surface. The A region is a region close to the reference cell first electrode, and the B region is a region located further away from the reference cell first electrode as compared with the A region.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: July 6, 2021
    Assignee: NGK Spark Plug Co., LTD.
    Inventors: Kentaro Kamada, Hitoshi Furuta, Satoshi Yamahara
  • Patent number: 11041823
    Abstract: A gas sensor (1) including: a sensor element (10) which includes a detection portion (11) and a heater (50); a metal shell (138); and a filled member (153) filled with a filling material between the metal shell and the sensor element, wherein a position at which change in a temperature of the sensor element is smallest when a disturbance is applied is a temperature reference position M, the filled member is positioned rearward of the temperature reference position, an overall axial length LT of the sensor element is not greater than 50 mm, an axial length LE from a rear end of the filled member to a rear end of the sensor element is not smaller than 13.5 mm, and an axial length LA from the temperature reference position to a front end of the filled member is greater than 5.0 mm and not greater than 11.5 mm.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: June 22, 2021
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kentaro Kamada, Hitoshi Furuta, Masaki Nakagawa
  • Publication number: 20210088471
    Abstract: A sensor element (100) including a measurement chamber (89); a pump cell (83) including a solid electrolyte body (69), an inner electrode (101), and an outer electrode (99); and a reference cell (85). At least one electrode contains a noble metal and a component of the solid electrolyte body. In a cross section, the at least one electrode has a noble metal region (205), a solid electrolyte body region (203), and a coexistence region (207) in which the noble metal and the component of the solid electrolyte body coexist. Further, in the cross section, an area ratio SR of the coexistence region is not less than 15.5% and is less than 30%.
    Type: Application
    Filed: September 16, 2020
    Publication date: March 25, 2021
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yosuke SUZUKI, Takumi Yamada, Hitoshi Furuta, Kentaro Kamada
  • Patent number: 10908348
    Abstract: A backlight unit includes LEDs, a light guide plate, a wavelength converter, and an LED controller. The LEDs include end-side LEDs arranged at ends in the direction of arrangement and a center LED arranged at the center in the direction of arrangement. The light guide plate includes a light entering end surface and a light exiting plate surface. The light entering end surface extends along the direction of arrangement. The wavelength converter extends along the direction of arrangement and is interposed among the LEDs and the light entering end surface. The wavelength converter includes a phosphor configured to wavelength-convert the light from the LEDs. The LED controller is configured to control the amount of light emitted by each LED per unit time such that the amount of light emitted by at least one of the end-side LEDs than the amount of light emitted by the center LED.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: February 2, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kentaro Kamada, Keitaro Matsui, Masanobu Harada
  • Publication number: 20200340940
    Abstract: A sensor element (10) including: a measurement chamber (150); a pump cell (110) including a solid electrolyte (111), an inner electrode (113) exposed to the measurement chamber, and an outer electrode (112), the pump cell being configured to adjust an oxygen concentration in the measurement chamber; a diffusion resistance portion (151); and a detection cell (120) configured to measure a concentration of a specific gas in the measurement target gas after the adjustment of the oxygen concentration. The outer electrode is covered by a porous layer (114) and is disposed in a hollow space (10G) surrounded by a gas non-permeable dense layer 115, 118. The hollow space is in communication with an air introduction hole (10h) that is open on a rear side relative to the diffusion resistance portion. The outer electrode is exposed via the porous layer to air introduced through the air introduction hole.
    Type: Application
    Filed: April 20, 2020
    Publication date: October 29, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Hitoshi FURUTA, Kentaro Kamada, Akinori Kojima, Satoshi Yamahara, Akihiro Hara
  • Publication number: 20200319156
    Abstract: A NOx sensor element includes: a first pump cell configured to adjust an oxygen concentration in a first measurement chamber; a diffusion resistance portion configured to adjust a diffusion rate of a measurement target gas introduced into the first measurement chamber; and a second pump cell in which a pump current corresponding to a NOx concentration in the measurement target gas after the adjustment of the oxygen concentration, flows. The first pump cell includes: a first solid electrolyte; an inner pump electrode containing a noble metal, and exposed to the first measurement chamber; and an outer pump electrode containing a noble metal, and disposed outside the first measurement chamber. The outer pump electrode contains not less than 22% by mass of a main component of the first solid electrolyte.
    Type: Application
    Filed: March 30, 2020
    Publication date: October 8, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kentaro KAMADA, Hitoshi FURUTA
  • Publication number: 20200241195
    Abstract: A backlight unit includes LEDs, a light guide plate, a wavelength converter, and an LED controller. The LEDs include end-side LEDs arranged at ends in the direction of arrangement and a center LED arranged at the center in the direction of arrangement. The light guide plate includes a light entering end surface and a light exiting plate surface. The light entering end surface extends along the direction of arrangement. The wavelength converter extends along the direction of arrangement and is interposed among the LEDs and the light entering end surface. The wavelength converter includes a phosphor configured to wavelength-convert the light from the LEDs. The LED controller is configured to control the amount of light emitted by each LED per unit time such that the amount of light emitted by at least one of the end-side LEDs than the amount of light emitted by the center LED.
    Type: Application
    Filed: September 23, 2016
    Publication date: July 30, 2020
    Inventors: KENTARO KAMADA, KEITARO MATSUI, MASANOBU HARADA
  • Publication number: 20200003723
    Abstract: A gas sensor including a detection element section (71) including a solid electrolyte body and a pair of electrodes disposed on the solid electrolyte body, and a heater (73) for heating the detection element section (71). Inherent characteristic information is recorded in a record section (170) provided on the gas sensor or a record section provided separately from the gas sensor. The inherent characteristic information is information specific to the detection element section (71) and which allows setting of a relation between a change in the temperature of the detection element section (71) and a change in the internal resistance between the pair of electrodes.
    Type: Application
    Filed: June 19, 2019
    Publication date: January 2, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kentaro KAMADA, Hitoshi FURUTA
  • Publication number: 20190277796
    Abstract: A sensor includes a pump cell and a reference cell generating voltage Vs or current. The pump cell includes a pump cell first electrode and a pump cell second electrode. The surface of the pump cell first electrode includes a noble metal region formed of a noble metal, a ceramic region, and a coexistence region in which the noble metal and the ceramic material coexist. The width of the coexistence region in an A region of the surface of the pump cell first electrode is greater than the width of the coexistence region in a B region of the surface. The A region is a region close to the reference cell first electrode, and the B region is a region located further away from the reference cell first electrode as compared with the A region.
    Type: Application
    Filed: February 25, 2019
    Publication date: September 12, 2019
    Applicant: NGK Spark Plug Co., LTD.
    Inventors: Kentaro KAMADA, Hitoshi FURUTA, Satoshi YAMAHARA
  • Publication number: 20190265405
    Abstract: An illumination device includes a first LED unit, a second LED unit which is arranged vertically above the first LED unit and whose power consumption is smaller than power consumption of the first unit, and a light guide plate having a first light incident surface which is composed of a surface facing the first unit and through which light emitted from the first unit enters, a second light incident surface which is composed of a surface facing the second LED unit and through which light emitted from the second unit enters, and a light emitting surface which is composed of one plate surface and from which light incident from the first light incident surface and the second light incident surface is emitted.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 29, 2019
    Inventors: YUKI OKAWA, KENTARO KAMADA
  • Patent number: 10345257
    Abstract: The gas sensor includes a gas sensor element, a casing, and an insulating inner member contained inside the casing. The gas sensor element includes a detection element and a heater. The detection element includes one or more cells each having a solid electrolyte body and a pair of electrodes. Each of the opposite side surfaces of the detection element includes a region including a smallest current cell and extending forward of the smallest current cell in the direction of an axial line. The region and the forward-facing surface of the detection element are covered with a glass coating having a glass transition point of higher than 700° C. but not higher than 800° C. and a porosity of 3.0% or less. The detection element is controlled to have a temperature equal to or lower than the glass transition point of the glass coating.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 9, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Takashi Konno, Tomohiro Wakazono, Kentaro Kamada, Hitoshi Furuta, Masaki Nakagawa
  • Publication number: 20190025245
    Abstract: A gas sensor (1) including: a sensor element (10) which includes a detection portion (11) and a heater (50); a metal shell (138); and a filled member (153) filled with a filling material between the metal shell and the sensor element, wherein a position at which change in a temperature of the sensor element is smallest when a disturbance is applied is a temperature reference position M, the filled member is positioned rearward of the temperature reference position, an overall axial length LT of the sensor element is not greater than 50 mm, an axial length LE from a rear end of the filled member to a rear end of the sensor element is not smaller than 13.5 mm, and an axial length LA from the temperature reference position to a front end of the filled member is greater than 5.0 mm and not greater than 11.5 mm.
    Type: Application
    Filed: July 19, 2018
    Publication date: January 24, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kentaro KAMADA, Hitoshi FURUTA, Masaki NAKAGAWA
  • Patent number: 10184640
    Abstract: A lighting device includes LEDs (a light source) 17, a wavelength conversion sheet (a wavelength conversion member) 20 containing phosphors for converting light emitted by the LEDs 17 with wavelength conversion, and a diffuser plate 15a that exerts diffusing effects on the light from the LEDs 17 and is thicker than the wavelength conversion sheet 20 and disposed on a light exit side with respect to the wavelength conversion sheet 20.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: January 22, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Kentaro Kamada
  • Patent number: 10162220
    Abstract: A lighting device 12 includes LEDs 17, a chassis 14 including a bottom plate 14a and having the LEDs 17 therein, a wavelength conversion sheet 20 disposed away from the LEDs 17 on a light exit side and containing phosphors for converting wavelength of light emitted by the LEDs 17, a reflection sheet 19 configured to reflect the light emitted by the LEDs 17 toward the wavelength conversion sheet 20, the reflection sheet 19 including at least a bottom reflection portion 19a disposed along the bottom plate 14a, and an extended reflection portion 19b extending from the bottom reflection portion 19a toward the wavelength conversion sheet 20, and a color exhibit member 23 disposed on a portion of the extended reflection portion 19b and configured to exhibit a tint closer to a tint of the light emitted by the LEDs 17 in comparison to the bottom reflection portion 19a.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: December 25, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Kentaro Kamada
  • Patent number: 9995704
    Abstract: A gas sensor element which has water-permeable electrodes, and water-impermeable leads connected to the electrodes A first electrode (133) has a space exposure portion (133b) exposed to internal space (160) of a gas sensor element (10) which communicates with an ambient atmosphere. A first lead (137) is connected to the first electrode (133). The first electrode (133) includes a first connection portion (133d) which is disposed at a position not exposed to the internal space (160) and connected to the first lead (137), and which is a portion of the first electrode (133) located most distant from the internal space (160). The entire first connection portion (133d) is located in a region A1 which extends from the internal space (160) over a distance of 1.0 mm or less. Also enclosed is a gas sensor including the gas sensor element.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: June 12, 2018
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kentaro Kamada, Masaki Nakagawa, Koji Shiotani
  • Publication number: 20180095051
    Abstract: The gas sensor includes a gas sensor element, a casing, and an insulating inner member contained inside the casing. The gas sensor element includes a detection element and a heater. The detection element includes one or more cells each having a solid electrolyte body and a pair of electrodes. Each of the opposite side surfaces of the detection element includes a region including a smallest current cell and extending forward of the smallest current cell in the direction of an axial line. The region and the forward-facing surface of the detection element are covered with a glass coating having a glass transition point of higher than 700° C. but not higher than 800° C. and a porosity of 3.0% or less. The detection element is controlled to have a temperature equal to or lower than the glass transition point of the glass coating.
    Type: Application
    Filed: September 26, 2017
    Publication date: April 5, 2018
    Applicant: NGK Spark Plug Co., LTD.
    Inventors: Takashi KONNO, Tomohiro WAKAZONO, Kentaro KAMADA, Hitoshi FURUTA, Masaki NAKAGAWA
  • Publication number: 20180045395
    Abstract: A lighting device includes LEDs (a light source) 17, a wavelength conversion sheet (a wavelength conversion member) 20 containing phosphors for converting light emitted by the LEDs 17 with wavelength conversion, and a diffuser plate 15a that exerts diffusing effects on the light from the LEDs 17 and is thicker than the wavelength conversion sheet 20 and disposed on a light exit side with respect to the wavelength conversion sheet 20.
    Type: Application
    Filed: March 4, 2016
    Publication date: February 15, 2018
    Inventor: Kentaro KAMADA
  • Publication number: 20180046031
    Abstract: A lighting device includes a light source, a light guide plate, a reflection member, a wavelength converting member, and a complementary color member. The light source is configured to emit primary light rays. The light guide plate includes a light entering surface, a light exiting surface, and an opposite surface disposed opposite from the light exiting surface. The reflection member covers the opposite surface. The wavelength converting member contains phosphors that emit secondary light rays in a wavelength range different from the wavelength range when excited by the primary light rays. The wavelength converting member is configured to pass some of the primary light rays and disposed to cover a space between the light source and a light entering end or cover the light entering end. The complementary color member exhibits a color that makes a complementary color pair with a reference color exhibited by the primary light rays.
    Type: Application
    Filed: March 8, 2016
    Publication date: February 15, 2018
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kentaro KAMADA, Akira GOTOU, Keitaro MATSUI, Masanobu HARADA, Takaharu SHIMIZU
  • Publication number: 20180031922
    Abstract: A lighting device 12 includes LEDs 17, a chassis 14 including a bottom plate 14a and having the LEDs 17 therein, a wavelength conversion sheet 20 disposed away from the LEDs 17 on a light exit side and containing phosphors for converting wavelength of light emitted by the LEDs 17, a reflection sheet 19 configured to reflect the light emitted by the LEDs 17 toward the wavelength conversion sheet 20, the reflection sheet 19 including at least a bottom reflection portion 19a disposed along the bottom plate 14a, and an extended reflection portion 19b extending from the bottom reflection portion 19a toward the wavelength conversion sheet 20, and a color exhibit member 23 disposed on a portion of the extended reflection portion 19b and configured to exhibit a tint closer to a tint of the light emitted by the LEDs 17 in comparison to the bottom reflection portion 19a.
    Type: Application
    Filed: February 24, 2016
    Publication date: February 1, 2018
    Inventor: KENTARO KAMADA
  • Publication number: 20170219517
    Abstract: A gas sensor unit includes a gas sensor and a control unit. The gas sensor unit includes: a first oxygen pump cell having a pair of electrodes and controlling the oxygen concentration; a second oxygen pump cell controlling the oxygen concentration; and a sensor cell that detects the concentration of a specific gas component in a measurement target gas. The control unit is electrically connected to the gas sensor and sets a voltage between the pair of electrodes of the first oxygen pump cell to a predetermined set value, and performs energization control to control the introduction or discharge of oxygen while changing a voltage applied between a pair of electrodes of the second oxygen pump cell so that an oxygen pump current of the first oxygen pump cell is maintained within a predetermined range of IL?I?IH.
    Type: Application
    Filed: January 27, 2017
    Publication date: August 3, 2017
    Applicant: NGK Spark Plug Co., LTD.
    Inventors: Daisuke UEMATSU, Tomohiro WAKAZONO, Masaki NAKAGAWA, Kentaro KAMADA, Hiroyuki HAYASHI