Patents by Inventor Kazuhiro Arai
Kazuhiro Arai 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).
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Publication number: 20100302512Abstract: An illumination apparatus includes: a red light valve configured to modulate red component light according to a red input signal; a green light valve configured to modulate green component light according to a green input signal; a blue light valve configured to modulate blue component light according to a blue input signal; a fourth color light valve configured to modulate a fourth color component light; and a color combiner configured to combine light emitted from the red light valve, the green light valve and the blue light valve. The fourth color component light emitted from the fourth to color light valve enters a certain light valve, which is any one of the red light valve, the green light valve and the blue light valve.Type: ApplicationFiled: August 5, 2010Publication date: December 2, 2010Applicant: SANYO ELECTRIC CO., LTD.Inventors: Makoto MAEDA, Ken MASHITANI, Kazuhiro ARAI
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Patent number: 7815340Abstract: Provided is an optical element (dichroic mirror) including a mirror surface transmitting a part of an incident light beam therethrough and reflecting the other part of the incident light beam. A target cutoff wavelength, which indicates a boundary wavelength between a wavelength band of a desired transmission light beam and a wavelength band of a desired reflection light beam, is defined, the mirror surface includes a plurality of slant regions, each of the plurality of slant regions includes a reference position at which a cutoff wavelength reference value, which determines whether a light beam having a reference incidence angle should be transmitted or reflected, indicates the target cutoff wavelength, and in each of the plurality of slant regions, the cutoff wavelength reference value is set to be a shorter or a longer wavelength than the target cutoff wavelength, based on a distance from the reference position.Type: GrantFiled: September 10, 2008Date of Patent: October 19, 2010Assignee: Sanyo Electric Co., Ltd.Inventor: Kazuhiro Arai
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Patent number: 7798649Abstract: An illumination apparatus includes: a red light valve configured to modulate red component light according to a red input signal; a green light valve configured to modulate green component light according to a green input signal; a blue light valve configured to modulate blue component light according to a blue input signal; a fourth color light valve configured to modulate a fourth color component light; and a color combiner configured to combine light emitted from the red light valve, the green light valve and the blue light valve. The fourth color component light emitted from the fourth color light valve enters a certain light valve, which is any one of the red light valve, the green light valve and the blue light valve.Type: GrantFiled: September 27, 2007Date of Patent: September 21, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Makoto Maeda, Ken Mashitani, Kazuhiro Arai
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Patent number: 7795822Abstract: A light source controller includes a light source driver, a light amount sensor, a memory configured to store property information indicating a relationship between the drive current and the outgoing light amount for each level of the environmental temperature of the solid-state light source, and a controller configured to control the drive current supplied from the light source driver. The controller obtains the property information corresponding to the environmental temperature of the solid-state light source according to the relationship between the drive current and the outgoing light amount, and controls the drive current according to the obtained property information so as to bring the outgoing light amount close to a target light amount.Type: GrantFiled: May 11, 2007Date of Patent: September 14, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Arai, Yoshihiro Yokote, Ryuhei Amano, Masutaka Inoue
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Patent number: 7655857Abstract: An apparatus for detecting the displacement of a movable member of an electronic musical instrument. The apparatus has superior mechanical durability compared to displacement sensors of the past and can withstand long-term use. The apparatus includes a sensor that provides a detectable electrical characteristic having a value and a spring that, when compressed upon displacement of the movable member acts with the sensor, causing the value of the electrical characteristic to change. The value of the electrical characteristic represents the amount of displacement of the movable member and is used by a controller of the electronic musical instrument.Type: GrantFiled: October 21, 2008Date of Patent: February 2, 2010Assignee: Roland CorporationInventors: Kiyoshi Yoshino, Kazuhiro Arai
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Publication number: 20100020397Abstract: A method for producing an optical element having a three-dimensional structural part that can resolve problems associated with deterioration of optical characteristics that is caused by variations in the element shape in the conventional process and poor endurance caused by insufficient joining strength and the optical element produced by the method are provided. A method for producing an optical element configured by joining at least a first optical member and a second optical member formed from an oxide material includes the processes of forming a refractive index periodic structural part with a period equal to or less than a visible light wavelength on at least one of the first optical member and the second optical member, forming a joining layer composed of an oxygen-deficient oxide on the first optical member and the second optical member, tightly joining the first optical member and the second optical member by the joining layer, and oxidizing the joining layer after the tight joining.Type: ApplicationFiled: July 28, 2009Publication date: January 28, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro Arai, Junji Terada, Masahide Iwakata
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Patent number: 7543962Abstract: A projection-type image display device includes three light sources respectively configured to emit a different colored outgoing light, a light combining unit configured to combine outgoing lights, and a projection unit configured to project a combined light combined by the light combining it. The projection-type image display device includes a first cooler configured to cool a first light source of the three light sources, and a second cooler configured to cool a second and a third light source of the three light sources except the first light source.Type: GrantFiled: April 26, 2007Date of Patent: June 9, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Takashi Miwa, Kazuhiro Arai, Yoshihiro Yokote
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Publication number: 20090133569Abstract: An apparatus for detecting the displacement of a movable member of an electronic musical instrument. The apparatus has superior mechanical durability compared to displacement sensors of the past and can withstand long-term use. The apparatus includes a sensor that provides a detectable electrical characteristic having a value and a spring that, when compressed upon displacement of the movable member acts with the sensor, causing the value of the electrical characteristic to change. The value of the electrical characteristic represents the amount of displacement of the movable member and is used by a controller of the electronic musical instrument.Type: ApplicationFiled: October 21, 2008Publication date: May 28, 2009Inventors: Kiyoshi YOSHINO, Kazuhiro ARAI
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Publication number: 20090086345Abstract: Provided is an optical element (dichroic mirror) including a mirror surface transmitting a part of an incident light beam therethrough and reflecting the other part of the incident light beam. A target cutoff wavelength, which indicates a boundary wavelength between a wavelength band of a desired transmission light beam and a wavelength band of a desired reflection light beam, is defined, the mirror surface includes a plurality of slant regions, each of the plurality of slant regions includes a reference position at which a cutoff wavelength reference value, which determines whether a light beam having a reference incidence angle should be transmitted or reflected, indicates the target cutoff wavelength, and in each of the plurality of slant regions, the cutoff wavelength reference value is set to be a shorter or a longer wavelength than the target cutoff wavelength, based on a distance from the reference position.Type: ApplicationFiled: September 10, 2008Publication date: April 2, 2009Applicant: SANYO ELECTRIC CO., LTD.Inventor: Kazuhiro ARAI
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Patent number: 7465053Abstract: A lens array wheel 4 receives light irradiated in a direction parallel to its rotation axis, to cyclically deflect the light. On each of liquid crystal display panels 7R, 7G, and 7B, the light is circularly scrolled, the effect of substantial intermittent illumination is produced, and hold blurring is reduced. A panel driver 15 starts to feed a pixel-driving signal in the succeeding frame to a pixel existing at a position, through which an illuminating area passes, on each of the liquid crystal display panels 7R, 7G, and 7B.Type: GrantFiled: March 26, 2003Date of Patent: December 16, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Mineki Taoka, Haruhiko Murata, Toshiya Iinuma, Koji Ishii, Kazuki Hashizumi, Kazuhiro Arai, Hideyuki Kanayama, Takashi Ikeda, Shouichi Yoshii, Yoshihiro Yokote, Yasuo Funazou
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Patent number: 7459626Abstract: An apparatus for detecting the displacement of a movable member of an electronic musical instrument. The apparatus has superior mechanical durability compared to displacement sensors of the past and can withstand long-term use. The apparatus includes a sensor that provides a detectable electrical characteristic having a value and a spring that, when compressed upon displacement of the movable member acts with the sensor, causing the value of the electrical characteristic to change. The value of the electrical characteristic represents the amount of displacement of the movable member and is used by a controller of the electronic musical instrument.Type: GrantFiled: November 5, 2004Date of Patent: December 2, 2008Assignee: Roland CorporationInventors: Kiyoshi Yoshino, Kazuhiro Arai
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Publication number: 20080259284Abstract: An illumination device includes a first light source unit having a plurality of first light sources, and a first reflection unit for guiding light beams emitted respectively from the first light sources in an identical direction. The illumination device further includes a second light source unit having at least one second light source. A center of an optical axis of the second light source is defined in an area where a light amount distribution of light beams to be emitted from the first light source unit and reflected on the first reflection unit is relatively small.Type: ApplicationFiled: April 14, 2008Publication date: October 23, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Makoto MAEDA, Ken MASHITANI, Kazuhiro ARAI, Hideyuki KANAYAMA, Takashi IKEDA, Takaaki ABE
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Publication number: 20080079905Abstract: An illumination apparatus includes: a red light valve configured to modulate red component light according to a red input signal; a green light valve configured to modulate green component light according to a green input signal; a blue light valve configured to modulate blue component light according to a blue input signal; a fourth color light valve configured to modulate a fourth color component light; and a color combiner configured to combine light emitted from the red light valve, the green light valve and the blue light valve. The fourth color component light emitted from the fourth color light valve enters a certain light valve, which is any one of the red light valve, the green light valve and the blue light valve.Type: ApplicationFiled: September 27, 2007Publication date: April 3, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Makoto Maeda, Ken Mashitani, Kazuhiro Arai
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Publication number: 20080042578Abstract: A light source controller includes a light source driver, a light amount sensor, a memory configured to store property information indicating a relationship between the drive current and the outgoing light amount for each level of the environmental temperature of the solid-state light source, and a controller configured to control the drive current supplied from the light source driver. The controller obtains the property information corresponding to the environmental temperature of the solid-state light source according to the relationship between the drive current and the outgoing light amount, and controls the drive current according to the obtained property information so as to bring the outgoing light amount close to a target light amount.Type: ApplicationFiled: May 11, 2007Publication date: February 21, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Arai, Yoshihiro Yokote, Ryuhei Amano, Masutaka Inoue
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Patent number: 7329004Abstract: A rear projection display device improves the brightness by improving the utilization efficiency of image light projected to a screen from slantly below. At least a green component of the image light is P-polarized to the screen (7). Therefore, reflection of light on the screen (7) is reduced.Type: GrantFiled: August 5, 2005Date of Patent: February 12, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Arai, Syoichi Yoshii
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Publication number: 20080012998Abstract: A projection-type image display apparatus including: a light source unit; an optical modulator including an incident surface and an output surface both being perpendicular to an optical axis of a light beam emitted from the light source, and configured to modulate a light beam emitted from the light source; a first polarizer provided to a surface of the optical modulator; and a second polarizer provided to another surface of the optical modulator. In the projection-type image display apparatus, the polarization direction of a light beam allowed to pass through the first polarizer and the polarization direction of a light beam allowed to pass through the second polarizer are substantially orthogonal to each other, and the light source unit emits a cross shaped light beam.Type: ApplicationFiled: June 28, 2007Publication date: January 17, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventor: Kazuhiro Arai
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Publication number: 20070279938Abstract: A projection-type image display device includes three light sources respectively configured to emit a different colored outgoing light, a light combining unit configured to combine outgoing lights, and a projection unit configured to project a combined light combined by the light combining it. The projection-type image display device includes a first cooler configured to cool a first light source of the three light sources, and a second cooler configured to cool a second and a third light source of the three light sources except the first light source.Type: ApplicationFiled: April 26, 2007Publication date: December 6, 2007Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takashi Miwa, Kazuhiro Arai, Yoshihiro Yokote
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Patent number: 7303291Abstract: An illumination apparatus includes: a group of light source segments; a group of condenser lenses arrayed as opposed to the group of light source segments, and a group of rectangular lens elements arrayed as opposed to the group of condenser lenses for converging a light ray transmitted through the opposing condenser lens; and an illumination optical system for guiding the rays to an illumination plane. The lens elements have a shape of a rectangle and are arrayed in a rectangular effective area in such a way that a longitudinal axis of each lens elements intersects an axis passing a side of the effective area at 45°.Type: GrantFiled: March 25, 2005Date of Patent: December 4, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Takashi Ikeda, Kazuhiro Arai
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Patent number: 7270425Abstract: An optimal processing portion (21) inputs a video signal (RGB signals) and analyzes 1-frame video in the video signal. For example, if the intensity of red color is 0 percent in all dots in 1-frame video, the optimal processing portion (21) applies to a light source gain adjustment portion (22) a control signal for rendering a gain of the illuminating device (1R) 0 percent (minimum amount of light). The light source gain adjustment portion (22) receives the control signal and controls power supply to the illuminating device (1R). In addition, the optimal processing portion (21) applies a driving instruction for rendering the amount of light transmission 0 percent with regard to all dots of the liquid crystal display panel (3R), for example, to a LCD signal processing portion (23).Type: GrantFiled: December 25, 2003Date of Patent: September 18, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Arai, Yasuo Funazou
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Patent number: 7264357Abstract: A rear projection display device improves the brightness by improving the utilization efficiency of image light projected to a screen from slantly below. At least a green component of the image light is P-polarized to the screen (7). Therefore, reflection of light on the screen (7) is reduced.Type: GrantFiled: August 8, 2006Date of Patent: September 4, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Arai, Syoichi Yoshii