Patents by Inventor Yoshito Suzuki
Yoshito Suzuki 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: 20130170028Abstract: A screen in which observation distance may be adjusted while maintaining image brightness and a projection system using the screen. In a light control layer of a screen, a first angle region that determines a diffusion distribution of a reflected light is different according to the screen position in a control direction in which light diffusion control is performed. Accordingly, a diffusion distribution of image light emitted from a screen surface is adjusted to be tilted downward by an upper end and upward by a lower end according to the screen position. Thus, for example, a size of a diffused angle range is maintained to be 30°, and a direction in which the image light is diffusion-emitted corresponds to an assumed position of an observer. The projection image can be observed while maintaining brightness of an image and the observation distance can be adjusted to be short.Type: ApplicationFiled: September 14, 2012Publication date: July 4, 2013Applicants: TOHOKU UNIVERSITY, SEIKO EPSON CORPORATIONInventors: Osamu Arakawa, Hiroyuki Shindo, Toshiaki Hashizume, Tatsuo Uchida, Yoshito Suzuki, Baku Katagiri
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Patent number: 8444135Abstract: A sheet conveyance device includes a loading section, a first conveyance member a separation section, a first sheet length detector to detect whether the sheet is longer than a predetermined length slightly longer than a specific sheet size in the sheet conveyance direction, a trailing-edge detector disposed downstream from the separation section, a leading-edge detector disposed downstream from the trailing-edge detector a distance smaller than the specific sheet size and from the first conveyance member a distance longer than the specific sheet size, and a controller. When the sheet is equal to or greater than the predetermined length, the controller starts sheet feeding when the trailing-edge detector detects the trailing edge of the sheet, and when the sheet is smaller than that, the controller starts sheet feeding when either the leading-edge detector detects the leading edge of the sheet or the trailing-edge detector detects the trailing edge thereof.Type: GrantFiled: November 10, 2011Date of Patent: May 21, 2013Assignee: Ricoh Company, Ltd.Inventors: Kenichiro Morita, Hideki Tobinaga, Shinya Kitaoka, Mamoru Kambayashi, Michitaka Suzuki, Atsushi Kanaya, Norio Kimura, Yoshito Suzuki
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Publication number: 20120314267Abstract: A sheet conveyance device includes a loading section, a sheet feeding unit, a separation section disposed downstream in a sheet conveyance direction from the sheet feeding unit, a conveyance member to transport a sheet separated by the separation section, a trailing-edge detector disposed at a first conveyance distance (L1) downstream from a separation position (Ab) and including a rotary follower and a rotation detector, a first leading-edge detector disposed downstream from the trailing-edge detector, and a controller. The trailing-edge detector A detects a sheet length in the sheet conveyance direction. The controller causes the sheet feeding unit to start sheet feeding in response to detection of the leading edge of the sheet by the first leading-edge detector when the detected sheet length equals a predetermined reference length and in other cases in response to detection of the trailing edge of the sheet by the trailing-edge detector.Type: ApplicationFiled: May 23, 2012Publication date: December 13, 2012Applicant: RICOH COMPANY, LTD.Inventors: Yoshito Suzuki, Hideki Tobinaga, Atsushi Kanaya, Shinya Kitaoka, Norio Kimura, Mamoru Kambayashi, Michitaka Suzuki, Kenichiro Morita
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Publication number: 20120268814Abstract: A screen which reflects light emitted from a projector includes a light diffusion layer through which light incident from a specific angular region is diffused and transmitted and through which light incident from the other angular region is transmitted straight; area pairs having a mirror forming area and a non-mirror forming area; a light transmissive layer having a back surface, on which the area pairs are disposed, and an opposite surface being bonded to a back side of the light diffusion layer; and a specular reflection film formed on a back surface of each mirror forming area. An inclination of the mirror forming area with respect to a normal line of the screen close to the projector becomes larger than the inclination of the mirror forming area far from the projector within a cross section perpendicular to the mirror forming areas inside the screen.Type: ApplicationFiled: April 18, 2012Publication date: October 25, 2012Applicants: SEIKO EPSON CORPORATION, TOHOKU UNIVERSITYInventors: Tatsuo UCHIDA, Yoshito SUZUKI, Baku KATAGIRI, Toshiaki HASHIZUME, Hiroyuki SHINDO, Osamu ARAKAWA
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Patent number: 8199278Abstract: Surface light source device includes: point light sources (13); light guide plate (1) having (i) two end parts in length direction, one of which serves as incident surface (2), and (ii) two end parts in thickness direction which serve as exit surface (7) and back surface (8), light guide plate (1) directing light, emitted from point light sources (13), incident on incident surface (2), so as to cause light to exit from substantially entire area of exit surface (7); and reflector (14) which reflects, toward incident surface (2), part of light which is emitted from point light sources (13) and is then reflected from incident surface (2). Incident surface (2) has elliptic arc (10) which is concave part having surface shape along elliptic arc identical to elliptic arc which is part of ellipse (31) having two focal points corresponding to point light sources (13) and reflector (14).Type: GrantFiled: August 4, 2009Date of Patent: June 12, 2012Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Publication number: 20120127398Abstract: A backlight system includes: a light-emitting section (1) having a plurality of light sources that emit beams of light at different dominant wavelengths from one another; and an imaging optical system (3) including a plurality of microlenses (3a) that focus beams of light emitted from the light-emitting section (1), the backlight system irradiating a liquid crystal panel with beams of light having passed through the imaging optical system (3), the liquid crystal panel including a plurality of pixels arrayed at a predetermined pitch from each other, on the assumption that the pitch at which the pixels are arrayed is denoted as P and the imaging optical system (3) has an imaging magnification of (1/n), the light sources (1) being arrayed at a pitch (P1) given as P1=n×P, the microlenses (3a) being arrayed at a pitch (P2) given as P2=(n/(n+1))×P.Type: ApplicationFiled: June 2, 2010Publication date: May 24, 2012Applicants: TOHOKU UNIVERSITY, SHARP KABUSHIKI KAISHAInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Publication number: 20120119432Abstract: A sheet conveying apparatus includes: a sheet housing unit that houses sheets in a stacked manner; a sheet conveying unit that conveys a sheet to a predetermined conveyance target position; a sheet pick-up unit that picks up outermost one of the sheets housed in the sheet housing unit for conveying to a sheet conveying unit side; a separating and conveying unit that separates the next sheet from the outermost sheet, and conveys only the outermost sheet to the sheet conveying unit; and a sheet-conveyance-movement detecting unit that detects presence or absence of movement of a sheet in the conveying direction. The sheet-conveyance-movement detecting unit is arranged at a position at which the outermost sheet and the next sheet may overlap each other, and a separation portion is located downstream of the pick-up position and is an area where a separation action of the separating and conveying unit works.Type: ApplicationFiled: October 5, 2011Publication date: May 17, 2012Applicant: Ricoh Company, LimitedInventors: Mamoru Kambayashi, Hideki Tobinaga, Shinya Kitaoka, Atsushi Kanaya, Norio Kimura, Michitaka Suzuki, Yoshito Suzuki, Kenichiro Morita
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Publication number: 20120119436Abstract: A sheet conveyance device includes a loading section, a first conveyance member a separation section, a first sheet length detector to detect whether the sheet is longer than a predetermined length slightly longer than a specific sheet size in the sheet conveyance direction, a trailing-edge detector disposed downstream from the separation section, a leading-edge detector disposed downstream from the trailing-edge detector a distance smaller than the specific sheet size and from the first conveyance member a distance longer than the specific sheet size, and a controller. When the sheet is equal to or greater than the predetermined length, the controller starts sheet feeding when the trailing-edge detector detects the trailing edge of the sheet, and when the sheet is smaller than that, the controller starts sheet feeding when either the leading-edge detector detects the leading edge of the sheet or the trailing-edge detector detects the trailing edge thereof.Type: ApplicationFiled: November 10, 2011Publication date: May 17, 2012Applicant: RICOH COMPANY, LTD.Inventors: Kenichiro Morita, Hideki Tobinaga, Shinya Kitaoka, Mamoru Kambayashi, Michitaka Suzuki, Atsushi Kanaya, Norio Kimura, Yoshito Suzuki
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Publication number: 20120057212Abstract: A sheet conveying device includes: a sheet loading unit; a pick-up roller that draws a sheet from a stack of sheets set on the sheet loading unit; a moving unit that causes the pick-up roller to separate from or press against a top-surface of the sheet; a feeding member; a prevention member that prevents an original from being conveyed by the feeding member; a separation unit that separates and conveys each sheet, which is fed by the pick-up roller, to downstream in a conveying direction; and a detection unit that detects whether the original moves, the detection unit being arranged in a position near the separation unit or in upstream of the separation unit in the conveying direction. At least when the stack of sheets is being set on the sheet loading unit, the detection unit is not in contact with the sheet.Type: ApplicationFiled: August 30, 2011Publication date: March 8, 2012Applicant: Ricoh Company, LimitedInventors: Hideki Tobinaga, Norio Kimura, Atsushi Kanaya, Michitaka Suzuki, Yoshito Suzuki, Kenichiro Morita, Shinya Kitaoka, Mamoru Kambayashi
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Publication number: 20110310330Abstract: According to a conventional backlight device for use in a thin full-color display device in which pixels are subjected to a color separation by colored lights, a large chromatic aberration occurs, thereby causing a deterioration in image quality.Type: ApplicationFiled: October 21, 2009Publication date: December 22, 2011Applicants: TOHOKU UNIVERSITY, SHARP KABUSHIKI KAISHAInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Publication number: 20110304092Abstract: An automatic document feeder includes a separating and feeding unit which has a separating member and a paper feeding member coming into contact with the separating member at a predetermined separating pressure, and separates and feeds an original sheet by sheet from a bundle of originals placed on an original placing table; a conveying unit which conveys the original separated by the separating and feeding unit toward a scanning position; a separating pressure switching unit which applies and releases the separating pressure and which is controlled by a control unit to release the separating pressure after a leading edge of a preceding sheet of the original has passed through the separating and feeding unit and to apply the separating pressure before a sheet of original separated and fed next to the preceding sheet of original is fed from the bundle of original to the separating and feeding unit.Type: ApplicationFiled: May 27, 2011Publication date: December 15, 2011Applicant: Ricoh Company, LimitedInventors: Mamoru Kambayashi, Motoya Sano, Hideki Tobinaga, Shinya Kitaoka, Atsushi Kanaya, Norio Kimura, Michitaka Suzuki, Yoshito Suzuki
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Patent number: 8054404Abstract: A dichroic filter column (4) is provided on an incident surface (11). At least one of two end parts of a light guide plate (1) in a thickness direction is divided into a plurality of light guide paths (6), in a width direction of the light guide plate (1) by a plurality of cutout grooves (5). Portions of the plurality of light guide paths (6) on an incident surface (11) side are aligned in accordance with positions of a plurality of dichroic filters (31), respectively. The plurality of dichroic filters (31) are elements of the dichroic filter column (4).Type: GrantFiled: August 4, 2009Date of Patent: November 8, 2011Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Patent number: 8040158Abstract: An apparatus having a complex sine wave generating circuit (3) that generates a complex sine wave, a multiplying circuit (4) that multiplies an input signal by the complex sine wave, a first integrating circuit (5) that integrates the product obtained by the multiplying circuit (4) in the time direction, a first squaring circuit (6) that takes the square of the absolute value of a complex signal output by the first integrating circuit (5), a second squaring circuit (7) that takes the square of the absolute value of the instantaneous amplitude of the input signal, a second integrating circuit (8) that integrates the results obtained by the second squaring circuit (7) in the time direction, and a frequency difference calculating circuit (9) that finds the difference between the frequency of the input signal and the oscillation frequency of the complex sine wave on the basis of the ratio between the output signal level of the first squaring circuit (6) and the output signal level of the second integrating circuiType: GrantFiled: June 14, 2005Date of Patent: October 18, 2011Assignee: Mitsubishi Electric CorporationInventor: Yoshito Suzuki
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Publication number: 20110228558Abstract: Conventional planar light source devices have a problem that increasing a utilization ratio of light results in a very narrow angle distribution of light. A planar light source device of the present invention has a light source (1), a light guide plate (2) for introducing light coming from the light source via a light-incident plane of the light guide plate and emits the light from almost all area of a light emission plane, and a light source side reflector (3) for reflecting the light coming from the light source and light which comes from the light source and is reflected by the light-incident plane of the light guide plate so that the reflected light is emitted to the light-incident plane of the light guide plate.Type: ApplicationFiled: October 13, 2009Publication date: September 22, 2011Applicants: SHARP KABUSHIKI KAISHA, TOHOKU UNIVERSITYInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Publication number: 20110199786Abstract: A dichroic filter column (4) is provided on an incident surface (11). At least one of two end parts of a light guide plate (1) in a thickness direction is divided into a plurality of light guide paths (6), in a width direction of the light guide plate (1) by a plurality of cutout grooves (5). Portions of the plurality of light guide paths (6) on an incident surface (11) side are aligned in accordance with positions of a plurality of dichroic filters (31), respectively. The plurality of dichroic filters (31) are elements of the dichroic filter column (4).Type: ApplicationFiled: August 4, 2009Publication date: August 18, 2011Applicants: SHARP KABUSHIKI KAISHA, TOHOKU UNIVERSITYInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Publication number: 20110167184Abstract: An access control apparatus includes: a determination section; and an update section.Type: ApplicationFiled: December 2, 2010Publication date: July 7, 2011Applicant: Sony CorporationInventors: Yoshito SUZUKI, Makoto Kanemaru
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Publication number: 20110141715Abstract: Surface light source device includes: point light sources (13); light guide plate (1) having (i) two end parts in length direction, one of which serves as incident surface (2), and (ii) two end parts in thickness direction which serve as exit surface (7) and back surface (8), light guide plate (1) directing light, emitted from point light sources (13), incident on incident surface (2), so as to cause light to exit from substantially entire area of exit surface (7); and reflector (14) which reflects, toward incident surface (2), part of light which is emitted from point light sources (13) and is then reflected from incident surface (2). Incident surface (2) has elliptic arc (10) which is concave part having surface shape along elliptic arc identical to elliptic arc which is part of ellipse (31) having two focal points corresponding to point light sources (13) and reflector (14).Type: ApplicationFiled: August 4, 2009Publication date: June 16, 2011Applicants: SHARP KABUSHIKI KAISHA, TOHOKU UNIVERSITYInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Baku KATAGIRI, Yoshihiro Hashmoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Publication number: 20110121866Abstract: An apparatus having a complex sine wave generating circuit (3) that generates a complex sine wave, a multiplying circuit (4) that multiplies an input signal by the complex sine wave, a first integrating circuit (5) that integrates the product obtained by the multiplying circuit (4) in the time direction, a first squaring circuit (6) that takes the square of the absolute value of a complex signal output by the first integrating circuit (5), a second squaring circuit (7) that takes the square of the absolute value of the instantaneous amplitude of the input signal, a second integrating circuit (8) that integrates the results obtained by the second squaring circuit (7) in the time direction, and a frequency difference calculating circuit (9) that finds the difference between the frequency of the input signal and the oscillation frequency of the complex sine wave on the basis of the ratio between the output signal level of the first squaring circuit (6) and the output signal level of the second integrating circuiType: ApplicationFiled: June 14, 2005Publication date: May 26, 2011Inventor: Yoshito Suzuki
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Publication number: 20090231512Abstract: A display is provided that comprises a reflection board and a display element. The reflection board includes a plurality of first inclinations and a plurality of second inclinations which are alternately arranged to form an uneven reflective surface to reflect and diffuse incident light. The display element has controllable transparency at each pixel and is disposed in front of the reflective surface. The mean inclination angle of the first inclination occurs within a range of 10 to 25 degrees.Type: ApplicationFiled: March 13, 2009Publication date: September 17, 2009Applicants: TOHOKU UNIVERSITY, HOYA CORPORATIONInventors: Tatsuo UCHIDA, Takahiro ISHINABE, Yoshito SUZUKI, Keiji SAWANOBORI
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Patent number: 7515211Abstract: A video signal processing circuit that uses a prescribed clock signal to process a digitized composite video signal. A clock generating means (2) generates the prescribed clock signal; a burst phase detecting means (3) detects color subcarrier phase information (p) in each line of the composite video signal; a phase difference calculation means (4) finds the phase difference between phase information (p) from the burst phase detecting means and a prescribed reference phase; a sampling phase conversion means (8) corrects the sampling phase of the composite video signal according to phase corrections (?b, ?t) obtained from the phase difference calculation means (4); a Y/C separation means (9) separates the luminance and chrominance signals from the composite video signal output from the sampling phase conversion means (8). Excellent two- or three-dimensional Y/C separation can be obtained regardless of the television broadcast system, even from a non-standard signal.Type: GrantFiled: August 25, 2004Date of Patent: April 7, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masako Asamura, Yoshito Suzuki, Toshihiro Gai, Koji Minami, Masaki Yamakawa