Patents by Inventor Akihiro Morikawa
Akihiro Morikawa 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).
-
Publication number: 20220208458Abstract: A capacitor includes a bus bar. The bus bar includes a bus bar body member and a terminal formation member configured to be superposed on and fixed to a terminal formation part of the bus bar body member. In the terminal formation part, a plurality of first connection terminal parts are formed so as to be arranged in one direction, by portions of the terminal formation part being cut and raised. In the terminal formation member, a plurality of second connection terminal parts are formed so as to be arranged in one direction, by portions of the terminal formation member being cut and raised, and second openings are formed in places where the portions have been cut and raised. The first connection terminal parts and the second connection terminal parts are alternately arranged in one direction, by the first connection terminal parts being passed through the second openings.Type: ApplicationFiled: March 15, 2022Publication date: June 30, 2022Inventors: Yoshiki KAMIMURA, Takeshi IMAMURA, Akihiro MORIKAWA, Wataru TAMURA
-
Patent number: 9690094Abstract: An optical device includes: an optical element having an optically functional surface which is pivotable; a base supporting the optical element; and a package housing the optical element and the base, in which the package includes: a wall that surrounds the optical element and the base; a window that closes a first opening defined by the wall, and forms an optical path to the optically functional surface, the window being transmissive to light; and a bottom plate that closes a second opening defined by the wall.Type: GrantFiled: January 30, 2015Date of Patent: June 27, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akira Kurozuka, Akihiro Morikawa, Toshiaki Horie, Shinsuke Nakazono
-
Publication number: 20160131895Abstract: An optical device includes: an optical element having an optically functional surface which is pivotable; a base supporting the optical element; and a package housing the optical element and the base, in which the package includes: a wall that surrounds the optical element and the base; a window that closes a first opening defined by the wall, and forms an optical path to the optically functional surface, the window being transmissive to light; and a bottom plate that closes a second opening defined by the wall.Type: ApplicationFiled: January 30, 2015Publication date: May 12, 2016Inventors: Akira KUROZUKA, Akihiro MORIKAWA, Toshiaki HORIE, Shinsuke NAKAZONO
-
Publication number: 20160062109Abstract: An optical scanning device includes: a case including a window; and an optical reflective element mounted in the case. The optical reflective element includes: a movable portion including a reflective surface; a beam having one end connected to the movable portion; and a fixed portion connected to the other end of the beam and fixed to the case. The fixed portion is approximately parallel to the window. The reflective surface is non-parallel to the fixed portion.Type: ApplicationFiled: February 9, 2015Publication date: March 3, 2016Inventors: Akihiro MORIKAWA, Toshiaki HORIE, Takehiro KOBAYASHI, Shinsuke NAKAZONO
-
Patent number: 9207451Abstract: An actuator includes a frame, a driver portion having one end connected to an inside of the frame, a movable portion connected to another end of the driver portion, and an electrode provided at the movable portion. The driver portion vibrates the movable portion by being driven by a driving signal. The electrode receives a high-frequency signal higher than that of the driving signal. This actuator is driven at a high speed by a large deflection angle, and can prevent dust from adhering to the movable portion.Type: GrantFiled: May 30, 2013Date of Patent: December 8, 2015Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Akihiro Morikawa, Soichiro Hiraoka, Shinsuke Nakazono, Kazuki Komaki
-
Publication number: 20150049155Abstract: An actuator includes a frame, a driver portion having one end connected to an inside of the frame, a movable portion connected to another end of the driver portion, and an electrode provided at the movable portion. The driver portion vibrates the movable portion by being driven by a driving signal. The electrode receives a high-frequency signal higher than that of the driving signal. This actuator is driven at a high speed by a large deflection angle, and can prevent dust from adhering to the movable portion.Type: ApplicationFiled: May 30, 2013Publication date: February 19, 2015Inventors: Akihiro Morikawa, Soichiro Hiraoka, Shinsuke Nakazono, Kazuki Komaki
-
Patent number: 8571076Abstract: A laser light source includes a fundamental laser generator that generates a fundamental laser light, a wavelength conversion element that is made of a ferroelectric crystal with a periodically poled structure and converts the fundamental laser light to a laser light having a different wavelength, a holding member that holds at least a part of an element surface of the wavelength conversion element that crosses a polarization direction of the periodically poled structure, and an insulation layer that is provided between the holding member and the element surface. Electric resistivity of the insulation layer is 1×108 ?·cm or higher.Type: GrantFiled: March 26, 2009Date of Patent: October 29, 2013Assignee: Panasonic CorporationInventors: Koichi Kusukame, Hiroyuki Furuya, Kiminori Mizuuchi, Tomoya Sugita, Akihiro Morikawa, Nobuyuki Horikawa, Kazuhisa Yamamoto, Shinichi Kadowaki
-
Publication number: 20120152892Abstract: Provided is a method for manufacturing an optical element, the method including: an electrode forming step of forming metal films on the plus z face and minus z face of a ferroelectric substrate to fabricate electrodes; a periodic electrode forming step of forming the metal film on the plus z face into a periodic electrode; a polarization reversal forming step of applying a voltage between the periodic electrode and the electrode on the minus z face to form polarization-reversed regions in the ferroelectric substrate; a surface treating step of removing the electrode, the periodic electrode, and surface layers on the plus z face and minus z face of the ferroelectric substrate; and an annealing step of applying predetermined heat to the ferroelectric substrate having the surface layers removed therefrom.Type: ApplicationFiled: September 15, 2010Publication date: June 21, 2012Applicant: PANASONIC CORPORATIONInventors: Akihiro Morikawa, Kiminori Mizuuchi
-
Patent number: 8189632Abstract: A laser emission device comprises a plurality of laser elements, a plurality of laser driving power supplies, optical elements which uniformize the laser light amount distributions of laser lights, plural light-receiving elements, a measurement unit which measures at least the relations between the operation current values of the laser elements and the output power values of the laser lights with respect to the operation current values, and the control unit operates the laser driving power supplies according to the operation current values and the output power values so as to make the light output powers of the laser elements different from each other.Type: GrantFiled: September 28, 2007Date of Patent: May 29, 2012Assignee: Panasonic CorporationInventors: Tetsuro Mizushima, Akihiro Morikawa, Kazuhisa Yamamoto, Kenichi Kasazumi, Hiroyuki Furuya, Shinichi Kadowaki
-
Patent number: 8089581Abstract: A display for illuminating a liquid crystal display panel with laser light of uniform light quantity distribution, and an illuminator for irradiating with laser light of uniform light quantity distribution. The display includes a liquid crystal display panel (204), laser light sources (205, 206, 207) emitting laser light having wavelengths of green, red, and blue colors, a waveguide plate (201) arranged at the back side of the liquid crystal display panel (204) and performing multiple reflection of laser light, and a diffusion plate (202) arranged at the back side of the waveguide plate (201), diffusing laser light propagating in the waveguide plate (201) and emitting the light toward the liquid crystal display panel (204).Type: GrantFiled: July 26, 2006Date of Patent: January 3, 2012Assignee: Panasonic CorporationInventors: Kiminori Mizuuchi, Kazuhisa Yamamoto, Shin-ichi Kadowaki, Tetsuro Mizushima, Akihiro Morikawa
-
Patent number: 8016427Abstract: There is provided a light source device which can miniaturize a two-dimensional image display device as small as possible. The light source device is provided with three coherent light sources (11a), (11b), and (11c) corresponding to red, blue, and green; prisms (12a) and (12c) for reflecting lights emitted from the coherent light sources (11a) and (11c); and a diffraction part (20) comprising a single volume hologram on which plural gratings are multiply-formed, which gratings diffract the light emitted from the coherent light source (11b), and the lights that are emitted from the coherent light sources (11a) and (11c) and reflected by the prisms (12a) and (12b) so that these lights propagate in the same optical path.Type: GrantFiled: December 22, 2009Date of Patent: September 13, 2011Assignee: Panasonic CorporationInventors: Ken'ichi Kasazumi, Kiminori Mizuuchi, Akihiro Morikawa, Kazuhisa Yamamoto
-
Patent number: 8018646Abstract: A wavelength conversion element is provided with a substrate including a nonlinear optical single crystal having a periodically poled structure, wherein a visible light transmittance of the substrate is 85% or higher when ultraviolet light is irradiated to the substrate. Further, a laser light having an average output of 1 W or more is outputted by shortening a wavelength of inputted laser light having a wavelength of 640 nm to 2000 nm. By improving visible light transmission characteristics when the ultraviolet light is irradiated in this way, a breakdown of crystal can be prevented and a stabilization of output characteristics at high output can be realized. As a result, an absorption of green light induced by ultraviolet light can also be suppressed and a saturation of output and the breakdown of crystal can be avoided.Type: GrantFiled: July 26, 2006Date of Patent: September 13, 2011Assignee: Panasonic CorporationInventors: Hiroyuki Furuya, Akihiro Morikawa, Kiminori Mizuuchi, Kazuhisa Yamamoto, Shinichi Kadowaki
-
Patent number: 7999998Abstract: A short wavelength light source includes a wavelength conversion element having an incident surface, on which a fundamental wave is incident, and an output surface, from which a harmonic wave is outputted. The wavelength conversion element converts the fundamental wave into the harmonic wave. In addition, the wavelength conversion element includes a holder holding the wavelength conversion element, wherein the wavelength conversion element has a specific region on a light output side, which is arranged so as to suppress variations in phase matching condition between the fundamental wave and the harmonic wave resulting from heat generated by absorbing the harmonic wave during a wavelength conversion.Type: GrantFiled: October 24, 2007Date of Patent: August 16, 2011Assignee: Panasonic CorporationInventors: Akihiro Morikawa, Kiminori Mizuuchi, Hiroyuki Furuya, Kazuhisa Yamamoto
-
Patent number: 7938541Abstract: The laser picture formation device includes a two-dimensional modulation element performing video image modulation as well as four or more laser light sources having different center wavelengths. The video images which have no speckle noises at the wavelength region that has high visibility, which are realized by simultaneously emitting the laser lights of green (G) and yellowish green (Y) which have particularly high visibility, and video images which are vivid as cannot be represented by the conventional display, and which can be realized by controlling the laser lights of respective colors independently, can be displayed. Particularly, by modulating the two-dimensional modulation element and the laser light output with synchronized with each other, various video displays are enabled.Type: GrantFiled: September 1, 2006Date of Patent: May 10, 2011Assignee: Panasonic CorporationInventors: Tetsuro Mizushima, Ken'ichi Kasazumi, Akihiro Morikawa, Hiroyuki Furuya, Kazuhisa Yamamoto, Yoshimasa Fushimi
-
Patent number: 7926950Abstract: A laser image display device includes: a first laser light source capable of outputting a laser light having a first wavelength; a second laser light source capable of outputting a laser light having a second wavelength; and a color output conversion controller capable of individually controlling power of the first and the second laser light source displaying the pixels constituting an image according to an input signal.Type: GrantFiled: May 29, 2006Date of Patent: April 19, 2011Assignee: Panasonic CorporationInventors: Tetsuro Mizushima, Ken'ichi Kasazumi, Akihiro Morikawa, Kazuhisa Yamamoto
-
Publication number: 20110080927Abstract: The light sources according to the present invention include a laser oscillator including a semiconductor laser, a drive circuit for the semiconductor laser, an ACC circuit, an APC circuit, and a switch, and a starting drive current storage device, and is controlled in such a manner that the driving current at the start of the laser driving be always constant, and after the start of the lighting, it is switched to the APC operation to carry out the power control of the laser light output.Type: ApplicationFiled: December 14, 2010Publication date: April 7, 2011Inventors: Akihiro MORIKAWA, Ken'ichi KASAZUMI, Tetsuro MIZUSHIMA, Kazuhisa YAMAMOTO, Shin-ichi KADOWAKI
-
Patent number: 7873087Abstract: The light sources according to the present invention include a laser oscillator including a semiconductor laser, a drive circuit for the semiconductor laser, an ACC circuit, an APC circuit, and a switch, and a starting drive current storage device, and is controlled in such a manner that the driving current at the start of the laser driving be always constant, and after the start of the lighting, it is switched to the APC operation to carry out the power control of the laser light output.Type: GrantFiled: July 11, 2006Date of Patent: January 18, 2011Assignee: Panasonic CorporationInventors: Akihiro Morikawa, Ken'ichi Kasazumi, Tetsuro Mizushima, Kazuhisa Yamamoto, Shin-ichi Kadowaki
-
Patent number: 7869120Abstract: An object of the invention is to increase the beam diameter of a laser beam, and perform high-output wavelength conversion without causing crystal damage. A laser wavelength conversion device includes a laser wavelength conversion element for allowing incidence of a laser beam as a fundamental wave to convert a part of the fundamental wave laser beam into a wavelength-converted laser beam having a wavelength different from a wavelength of the fundamental wave laser beam. The laser wavelength conversion element includes a non-linear optical crystal having periodically polarization reversed portions. The polarization reversed portions are formed in such a manner that a region where a wavelength conversion efficiency is substantially uniform extends in a polarization direction of the non-linear optical crystal. The incident laser beam is converted into the wavelength-converted laser beam with the wavelength conversion efficiency.Type: GrantFiled: May 15, 2008Date of Patent: January 11, 2011Assignee: Panasonic CorporationInventors: Koichi Kusukame, Kiminori Mizuuchi, Tomoya Sugita, Akihiro Morikawa
-
Publication number: 20100165453Abstract: A short wavelength light source includes a wavelength conversion element having an incident surface, on which a fundamental wave is incident, and an output surface, from which a harmonic wave is outputted, the wavelength conversion element being provided for converting the fundamental wave into the harmonic wave; and a holder for holding said wavelength conversion element, wherein the wavelength conversion element has a specific region on the light output side, which is arranged so as to suppress variations in phase matching condition between the fundamental wave and the harmonic wave resulting from heat generated by absorbing the harmonic wave during a wavelength conversion.Type: ApplicationFiled: October 24, 2007Publication date: July 1, 2010Inventors: Akihiro Morikawa, Kiminori Mizuuchi, Hiroyuki Furuya, Kazuhisa Yamamoto
-
Publication number: 20100165452Abstract: A wavelength conversion element is provided with a substrate including a nonlinear optical single crystal having a periodically poled structure, the visible light transmittance of the substrate is 85% or higher when ultraviolet light is irradiated to the substrate, and laser light having an average output of 1 W or more is outputted by shortening the wavelength of laser light having a wavelength of 640 nm to 2000 nm. By improving visible light transmission characteristics when the ultraviolet light is irradiated in this way, the breakdown of crystal can be prevented and the stabilization of output characteristics at high output can be realized. As a result, the absorption of green light induced by ultraviolet light can also be suppressed, and the saturation of output and the breakdown of crystal can be avoided.Type: ApplicationFiled: July 26, 2006Publication date: July 1, 2010Inventors: Hiroyuki Furuya, Akihiro Morikawa, Kiminori Mizuuchi, Kazuhisa Yamamoto, Shinichi Kadowaki