Patents by Inventor Yasuhisa Itoh
Yasuhisa Itoh 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: 20240127982Abstract: An information processing apparatus includes a converting portion having a plurality of electrical conductors to be arranged in mutual separation and a medium arranged so as to mutually connect the plurality of electrical conductors, wherein the converting portion is the information processing apparatus to convert an input signal to an output signal. The medium includes the electrolyte and is configured to be capable of controlling an electrical conductivity of an electrically conductive path mutually electrically connecting the plurality of electrical conductors, and the medium is selected such that the electrical conductivity of the electrically conductive path changes over time with the input signal not being present.Type: ApplicationFiled: January 27, 2022Publication date: April 18, 2024Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, TOKYO UNIVERSITY OF SCIENCE FOUNDATION, TOYOTA PHYSICAL AND CHEMICAL RESEARCH INSTITUTE, NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY, NAGASE & CO., LTD.Inventors: Hiroyuki AKINAGA, Hisashi SHIMA, Yasuhisa NAITOH, Hiroshi SATOU, Dan SATOU, Takuma MATSUO, Kentaro KINOSHITA, Toshiyuki ITOH, Toshiki NOKAMI, Masakazu KOBAYASHI
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Patent number: 11054695Abstract: A chip-mounted board including: micro light-emitting chips arranged in a matrix pattern in a light-emitting region; and a conductive line electrically connected to the micro light-emitting chips, the light-emitting region including a first region having a first luminance, a second region having a second luminance lower than the first luminance, and a third region having a third luminance lower than the first luminance and higher than the second luminance, the luminances being values determined with the same magnitude of current supplied to the micro light-emitting chips, the third region being positioned between the first region and the second region and satisfying the following formulas (1) and (2): (1+k)/(1?k)?63.895×tan(0.5°)×500/W+6.0525??(1) L2=k×L1??(2) wherein L1 represents the first luminance, L2 represents the second luminance, and W represents a width (unit: mm) of the third region.Type: GrantFiled: July 10, 2019Date of Patent: July 6, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Taimi Oketani, Atsushi Ban, Yasuhisa Itoh, Takeshi Ishida
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Publication number: 20200019016Abstract: A chip-mounted board including: micro light-emitting chips arranged in a matrix pattern in a light-emitting region; and a conductive line electrically connected to the micro light-emitting chips, the light-emitting region including a first region having a first luminance, a second region having a second luminance lower than the first luminance, and a third region having a third luminance lower than the first luminance and higher than the second luminance, the luminances being values determined with the same magnitude of current supplied to the micro light-emitting chips, the third region being positioned between the first region and the second region and satisfying the following formulas (1) and (2): (1+k)/(1?k)?63.895×tan(0.5°)×500/W+6.0525??(1) L2=k×L1??(2) wherein L1 represents the first luminance, L2 represents the second luminance, and W represents a width (unit: mm) of the third region.Type: ApplicationFiled: July 10, 2019Publication date: January 16, 2020Inventors: Taimi Oketani, Atsushi Ban, Yasuhisa Itoh, Takeshi Ishida
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Patent number: 9939127Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, and the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?.Type: GrantFiled: July 26, 2013Date of Patent: April 10, 2018Assignees: Sharp Kabushiki Kaisha, TOHOKU UNIVERSITYInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii, David Montgomery
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Patent number: 9310619Abstract: To provide a thin optical sheet having improved efficiency for light utilization, an optical sheet (5) of one mode of the present invention includes, in sequence from a light entry side to a light emission side, a plurality of first prisms (13), a ¼ wavelength plate (11), and a polarized-light separating element (12), the plurality of first prisms (13) each having (i) a first surface (13a) through which light enters the first prism and (ii) a second surface (13b) that reflects the light, having entered the first prism, toward the light emission side, the optical film further including, between the plurality of first prisms in an in-plane direction of the optical film, a second prism (14) that reflects light.Type: GrantFiled: February 15, 2013Date of Patent: April 12, 2016Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
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Patent number: 9217552Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?, and at least either of a light entry surface or a light exit surface of the first lens or the second lens includes a non-revolution surface (SO) as a lens surface, and a plurality of boundary lines (B1-B4) whose curvatures vary discontinuously are providType: GrantFiled: July 2, 2013Date of Patent: December 22, 2015Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
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Publication number: 20150211709Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, and the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?.Type: ApplicationFiled: July 26, 2013Publication date: July 30, 2015Applicants: Sharp Kabushiki Kaisha, TOHOKU UNIVERSITYInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii, David Montgomery
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Publication number: 20150167924Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?, and at least either of a light entry surface or a light exit surface of the first lens or the second lens includes a non-revolution surface (SO) as a lens surface, and a plurality of boundary lines (B1-B4) whose curvatures vary discontinuously are providType: ApplicationFiled: July 2, 2013Publication date: June 18, 2015Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
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Publication number: 20150036215Abstract: To provide a thin optical sheet having improved efficiency for light utilization, an optical sheet (5) of one mode of the present invention includes, in sequence from a light entry side to a light emission side, a plurality of first prisms (13), a ¼ wavelength plate (11), and a polarized-light separating element (12), the plurality of first prisms (13) each having (i) a first surface (13a) through which light enters the first prism and (ii) a second surface (13b) that reflects the light, having entered the first prism, toward the light emission side, the optical film further including, between the plurality of first prisms in an in-plane direction of the optical film, a second prism (14) that reflects light.Type: ApplicationFiled: February 15, 2013Publication date: February 5, 2015Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
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Publication number: 20150015456Abstract: A multi-display device (101) of the present invention includes fry-eye lens arrays (3), located between a plurality of liquid crystal modules (11) arranged in parallel and in a tiling manner and a diffusing element (12), which cause rays of light emitted from light source sections (2) and transmitted through the liquid crystal modules (11) to be condensed on the diffusing element (12) at a pitch that is wider than a pixel pitch of the liquid crystal modules (11). This makes it possible with a simple configuration to make seams between image modulation elements less conspicuous and give a satisfactory feeling of resolution.Type: ApplicationFiled: February 14, 2013Publication date: January 15, 2015Applicant: TOUOKU UNIVERISTYInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
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Patent number: 7518676Abstract: A method of making a micro corner cube array includes the steps of: preparing a substrate, at least a surface portion of which consists of cubic single crystals and which has a surface that is substantially parallel to {111} planes of the crystals; and etching the surface of the substrate anisotropically, thereby forming a plurality of unit elements for the micro corner cube array on the surface of the substrate. Each of these unit elements is made up of a number of crystal planes that have been formed at a lower etch rate than the {111} planes of the crystals.Type: GrantFiled: March 8, 2006Date of Patent: April 14, 2009Assignee: Sharp Kabushiki KaishaInventors: Kiyoshi Minoura, Shun Ueki, Yasuhisa Itoh, Ichiroh Ihara, Yutaka Sawayama, Kohji Taniguchi
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Erasing device for liquid crystal display image and liquid crystal display device including the same
Patent number: 7499009Abstract: An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source.Type: GrantFiled: June 9, 2005Date of Patent: March 3, 2009Assignee: Sharp Kabushiki KaishaInventors: Makoto Kanbe, Yasuhisa Itoh, Shigeto Yoshida, Hiroshi Yoneda -
Patent number: 7098976Abstract: A method of making a micro corner cube array includes the steps of: preparing a substrate, at least a surface portion of which consists of cubic single crystals and which has a surface that is substantially parallel to {111} planes of the crystals; and etching the surface of the substrate anisotropically, thereby forming a plurality of unit elements for the micro corner cube array on the surface of the substrate. Each of these unit elements is made up of a number of crystal planes that have been formed at a lower etch rate than the {111} planes of the crystals.Type: GrantFiled: June 17, 2002Date of Patent: August 29, 2006Assignee: Sharp Kabushiki KaishaInventors: Kiyoshi Minoura, Shun Ueki, Yasuhisa Itoh, Ichiroh Ihara, Yutaka Sawayama, Kohji Taniguchi
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Publication number: 20060146237Abstract: A method of making a micro corner cube array includes the steps of: preparing a substrate, at least a surface portion of which consists of cubic single crystals and which has a surface that is substantially parallel to {111} planes of the crystals; and etching the surface of the substrate anisotropically, thereby forming a plurality of unit elements for the micro corner cube array on the surface of the substrate. Each of these unit elements is made up of a number of crystal planes that have been formed at a lower etch rate than the {111} planes of the crystals.Type: ApplicationFiled: March 8, 2006Publication date: July 6, 2006Applicant: Sharp Kabushiki KaishaInventors: Kiyoshi Minoura, Shun Ueki, Yasuhisa Itoh, Ichiroh Ihara, Yutaka Sawayama, Kohji Taniguchi
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Erasing device for liquid crystal display image and liquid crystal display device including the same
Publication number: 20060007217Abstract: An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source.Type: ApplicationFiled: June 9, 2005Publication date: January 12, 2006Applicant: Sharp Kabushiki KaishaInventors: Makoto Kanbe, Yasuhisa Itoh, Shigeto Yoshida, Hiroshi Yoneda -
Erasing device for liquid crystal display image and liquid crystal display device including the same
Patent number: 6940479Abstract: An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source.Type: GrantFiled: March 6, 2002Date of Patent: September 6, 2005Assignee: Sharp Kabushiki KaishaInventors: Makoto Kanbe, Yasuhisa Itoh, Shigeto Yoshida, Hiroshi Yoneda -
Patent number: 6717640Abstract: The reflection-type liquid crystal display device includes two liquid crystal layers for selectively reflecting light in a specific wavelength range, and a partition wall interposed between the liquid crystal layers so as to separate the liquid crystal layers from each other. The partition wall serves as a scattering layer having a light scattering function.Type: GrantFiled: August 22, 2002Date of Patent: April 6, 2004Assignee: Sharp Kabushiki KaishaInventors: Eiji Sato, Yasuhisa Itoh, Kiyoshi Minoura, Tomoko Teranishi
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Patent number: 6704079Abstract: A display device includes a reflector in which a plurality of elements, each including a number of reflective regions, is arranged. In the reflector, the reflective regions of each said element are disposed so that at least part of incoming light, which has been incident on the element, is reflected by each one of the reflective regions after another and then allowed to go out of the element. At least one of the reflective regions of each said element includes: a light reflective plane; and a light modulating layer that is formed on one side of the light reflective plane so as to face the incoming light.Type: GrantFiled: January 31, 2002Date of Patent: March 9, 2004Assignee: Sharp Kabushiki KaishaInventors: Kiyoshi Minoura, Shun Ueki, Masahiko Tomikawa, Eiji Satoh, Tomoko Teranishi, Yasuhisa Itoh
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Patent number: 6600535Abstract: A reflector includes a substrate, a plurality of convex/concave portions formed on the substrate, and a thin reflective film formed over the convex/concave portions. When light is incident upon the reflector from a certain direction, an intensity of reflected light in a viewing angle range of about −45° to +45° with respect to a regular reflection direction of the incident light 10 is about 60% or more of an intensity of light which is incident upon a standard white plate from a direction inclined by about 30° from a direction normal to the plate and is reflected to the direction normal to the plate.Type: GrantFiled: February 25, 1999Date of Patent: July 29, 2003Assignee: Sharp Kabushiki KaishaInventors: Kazuhiko Tsuda, Masako Nakamura, Akiyoshi Fujii, Mariko Ban, Yasuhisa Itoh, Kozo Nakamura, Naofumi Kimura
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Publication number: 20030059762Abstract: In the present system, textbook data stored in a server is represented and distributed to a teacher's terminal. Because of this, it is not necessary for a textbook issuer to print a sample textbook. Further, especially in the system, the server creates an original data by a combination of a plurality of textbook data in response to an instruction which is supplied from the teacher's terminal and distributes the original data thus created to the teacher's terminal. For the users of the teacher's terminal, this makes it possible to create and obtain their own (original) textbook data. Therefore, the users of the teacher's terminal can create a suitable textbook depending on use conditions (for example, the number or academic ability of students who the users teach or students' academic abilities).Type: ApplicationFiled: August 14, 2002Publication date: March 27, 2003Inventors: Sayuri Fujiwara, Yasuhisa Itoh