Patents by Inventor Tatsuo Uchida
Tatsuo Uchida 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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Patent number: 11945522Abstract: A vehicle-mounted apparatus includes: first and second voltage conversion circuits configured to convert voltages of electric powers supplied from first and second electric power supply circuits, to first and second predetermined voltages; first and second control circuits configured to be operated by the electric powers of the first and second predetermined voltages supplied from the first and second voltage conversion circuits, and to output first and second actuator command signals; first and second actuators configured to be actuated based on the first and second actuator command signals.Type: GrantFiled: December 13, 2018Date of Patent: April 2, 2024Assignee: Knorr-Bremse Commercial Vehicle Systems Japan Ltd.Inventors: Tatsuo Matsumura, Yukio Uchida
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Publication number: 20240091641Abstract: Methods and apparatus provide for acquiring position information about a head-mounted display; performing information processing using the position information about the head-mounted display; generating and outputting data of an image to be displayed as a result of the information processing; and generating and outputting data of an image of a user guide indicating position information about a user in a real space using the position information about the head-mounted display, where the image of the user guide represents a state of the real space in which the user is physically located, as viewed obliquely.Type: ApplicationFiled: December 4, 2023Publication date: March 21, 2024Applicant: Sony Interactive Entertainment Inc.Inventors: Shoichi Ikenoue, Tatsuo Tsuchie, Tetsugo Inada, Masaki Uchida, Hirofumi Okamoto
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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: 9507197Abstract: A lighting device includes: a light guide plate; a light source; and a light modulation element disposed on a surface of or in the inside of the light guide plate, and adhered to the light guide plate. The light modulation element has a pair of transparent substrates, a first electrode provided on a surface of one of the transparent substrates, a second electrode provided on a surface of the other of the transparent substrates, and a light modulation layer, provided in a gap between the transparent substrates, exhibiting a light-scattering property or a light-transmitting property concerning light from the light source depending on intensity of an electric field. One or both of the first and second electrodes include partial electrodes. First partial electrodes of the partial electrodes are adjacent to second partial electrodes of the partial electrodes, and have irregular shapes on edges adjacent to the second partial electrodes.Type: GrantFiled: March 30, 2011Date of Patent: November 29, 2016Assignees: Sony Corporation, Tohoku UniversityInventors: Tatsuo Uchida, Takahiro Ishinabe, Tohru Kawakami, Kentaro Okuyama, Mamoru Mizuno
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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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Patent number: 9122097Abstract: A backlight system (30) includes a light emitting section (31) and an imaging optical system. The imaging optical system includes a first microlens array (MLA1) and a second microlens array (MLA2). The lenses (1A) separates the beams of light emitted from the light emitting section (31) by RGB, and causes them to be converged at a pitch same as a pitch at which the picture elements are arrayed. The lenses (2A) are provided in one-to-one correspondence to the picture elements such that the lenses (2A) have their respective focal points at positions onto which beams of light having passed through the lenses (1A) are converged. The lenses (2A) thus deflect the beams of light which have passed through the lenses (1A) in a substantially vertical direction with respect to the display surface of the liquid crystal panel.Type: GrantFiled: December 22, 2010Date of Patent: September 1, 2015Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Baku Katagiri, Katsunori Ehara, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, 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: 8922735Abstract: 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: GrantFiled: June 2, 2010Date of Patent: December 30, 2014Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: 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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Patent number: 8810752Abstract: A thin backlight system includes: a light emitting section emitting lights that have different dominant wavelengths; and a plurality of light transmitting portions, the thin backlight system deflecting the lights and then converging the lights on the plurality of light transmitting portions. The thin backlight system further includes: an imaging optical system provided to face surfaces, of the plurality of light transmitting portions, on which the lights are converged. The imaging optical system including a plurality of identical lenses arranged in a vertical and/or a horizontal direction at a pitch determined by multiplying a pitch at which the plurality of light transmitting portions are arranged in a vertical and/or a horizontal direction by the number of types of the different dominant wavelengths and being configured to converge the lights from the light emitting section on light transmitting portions to which the different dominant wavelengths of the lights correspond.Type: GrantFiled: October 21, 2009Date of Patent: August 19, 2014Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Patent number: 8780444Abstract: 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 L can be adjusted to be short.Type: GrantFiled: September 14, 2012Date of Patent: July 15, 2014Assignees: Seiko Epson Corporation, Tohoku UniversityInventors: Osamu Arakawa, Hiroyuki Shindo, Toshiaki Hashizume, Tatsuo Uchida, Yoshito Suzuki, Baku Katagiri
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Patent number: 8654442Abstract: 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: GrantFiled: April 18, 2012Date of Patent: February 18, 2014Assignee: Seiko Epson CorporationInventors: Tatsuo Uchida, Yoshito Suzuki, Baku Katagiri, Toshiaki Hashizume, Hiroyuki Shindo, Osamu Arakawa
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Publication number: 20130201424Abstract: A backlight system (30) includes a light emitting section (31) and an imaging optical system. The imaging optical system includes a first microlens array (MLA1) and a second microlens array (MLA2). The lenses (1A) separates the beams of light emitted from the light emitting section (31) by RGB, and causes them to be converged at a pitch same as a pitch at which the picture elements are arrayed. The lenses (2A) are provided in one-to-one correspondence to the picture elements such that the lenses (2A) have their respective focal points at positions onto which beams of light having passed through the lenses (1A) are converged. The lenses (2A) thus deflect the beams of light which have passed through the lenses (1A) in a substantially vertical direction with respect to the display surface of the liquid crystal panel.Type: ApplicationFiled: December 22, 2010Publication date: August 8, 2013Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Baku Katagiri, Katsunori Ehara, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Patent number: 8493526Abstract: A lighting device includes: a light guide plate; a light source disposed on a side face of the light guide plate; and a light modulation element disposed on a surface or in the inside of the light guide plate and adhered to the light guide plate. The light modulation element has a pair of transparent substrates disposed separately and oppositely, a pair of electrodes provided on respective surfaces of the pair of transparent substrates, and a light modulation layer provided in a gap between the pair of transparent substrates. The light modulation layer includes a first region, having optical anisotropy, responsive to an electric field, and a second region, having optical anisotropy, unresponsive to an electric field. The second region has a striped structure with average striped texture size of 0.05 ?m to 10 ?m both inclusive in a short axis direction.Type: GrantFiled: March 30, 2011Date of Patent: July 23, 2013Assignees: Sony Corporation, Tohoku UniversityInventors: Tatsuo Uchida, Takahiro Ishinabe, Tohru Kawakami, Tomoaki Suzuki, Kentaro Okuyama, Akira Ebisui, Harumi Sato, Mamoru Mizuno, Masahiro Ikeda, Shogo Shinkai
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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: 8330709Abstract: An illuminating device capable of improving display luminance while decreasing light leakage in a range with a large view angle and a display unit are provided. In a light modulation device bonded to a light guide plate, a light modulation layer containing a bulk and microparticles is provided. Both the bulk and the microparticles have optical anisotropy, and each response speed to an electric field is different from each other. Thereby, by controlling the electric field, each optical axis orientation of the bulk and the microparticles is able to correspond with each other, or is able to be different from each other.Type: GrantFiled: November 1, 2010Date of Patent: December 11, 2012Assignees: Sony Corporation, Tohoku UniversityInventors: Tatsuo Uchida, Takahiro Ishinabe, Tohru Kawakami, Kentaro Okuyama, Harumi Sato
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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