Patents by Inventor Tetsuya Ooshima
Tetsuya Ooshima 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: 11126002Abstract: This head-mounted display is provided with, closer to the viewing side than a color filter having a black matrix between pixels in a liquid crystal display panel (160), an anisotropic optical film (150), the linear transmittance of which changes according to the angle of incident light, wherein the anisotropic optical film (150) includes a single-layered or multilayered anisotropic light diffusion layer, on at least on one surface of the anisotropic light diffusion layer, surface asperities having an arithmetic average roughness Ra of 0.10 ?m or less, which is measured in accordance with JIS B0601-2001, are formed, the anisotropic light diffusion layer has a matrix region and a plurality of pillar regions having a refractive index different from that of the matrix region, and the visibility of the black matrix is lowered by the anisotropic optical film (150), thereby making it possible to obtain a higher sense of immersion without feeling coloring.Type: GrantFiled: March 22, 2019Date of Patent: September 21, 2021Assignees: Tomoegawa Co., Ltd., Japan Display Inc.Inventors: Tsubasa Sakano, Masahide Sugiyama, Tetsuya Ooshima, Ryotaro Kogure, Yukihiro Nakamura
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Publication number: 20210247609Abstract: This head-mounted display is provided with, closer to the viewing side than a color filter having a black matrix between pixels in a liquid crystal display panel (160), an anisotropic optical film (150), the linear transmittance of which changes according to the angle of incident light, wherein the anisotropic optical film (150) includes a single-layered or multilayered anisotropic light diffusion layer, on at least on one surface of the anisotropic light diffusion layer, surface asperities having an arithmetic average roughness Ra of 0.10 ?m or less, which is measured in accordance with JIS B0601-2001, are formed, the anisotropic light diffusion layer has a matrix region and a plurality of pillar regions having a refractive index different from that of the matrix region, and the visibility of the black matrix is lowered by the anisotropic optical film (150), thereby making it possible to obtain a higher sense of immersion without feeling coloring.Type: ApplicationFiled: March 22, 2019Publication date: August 12, 2021Inventors: Tsubasa SAKANO, Masahide SUGIYAMA, Tetsuya OOSHIMA, Ryotaro KOGURE, Yukihiro NAKAMURA
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Patent number: 10088624Abstract: To provide a thin liquid crystal display device featuring excellent color reproducibility. The liquid crystal display panel includes: a liquid crystal display panel outputting different colors on a per-pixel basis; and a backlight. The backlight includes: a light source; a light guide; a reflective sheet on a back side of the light guide; and a group of optical sheets including a wavelength converter and disposed between the liquid crystal display panel and the light guide. The wavelength converter has a structure where quantum dots are dispersed in a transparent medium. The wavelength converter is bonded to another optical medium by means of a diffusing adhesive. Nanoparticles for developing Rayleigh scattering are dispersed in the wavelength converter.Type: GrantFiled: January 31, 2017Date of Patent: October 2, 2018Assignee: Japan Display Inc.Inventors: Masaki Nishikawa, Tetsuya Ooshima, Yasuhisa Shiraishi, Masateru Morimoto
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Patent number: 9995965Abstract: In an FFS liquid crystal display device, viewing angle characteristics are further improved. In an FFS liquid crystal display device, the alignment axis of a first alignment film of a first substrate and the alignment axis of a second alignment film of a second substrate are directed in the same direction. At least two of an upper polarizer, a lower polarizer, or a retardation plate 160 satisfy conditions below. (1) The absorption axis of the upper polarizer forms an angle of one to 45 degrees inclusive with the alignment axis. (2) The absorption axis of the lower polarizer forms an angle of 91 to 135 degrees inclusive or forms an angle of 45 to 89 degrees inclusive with the alignment axis. (3) The extension axis of the retardation plate 160 forms an angle of one to 45 degrees inclusive with the alignment axis.Type: GrantFiled: December 29, 2015Date of Patent: June 12, 2018Assignee: Japan Display Inc.Inventors: Masaki Nishikawa, Tetsuya Ooshima
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Publication number: 20170227701Abstract: To provide a thin liquid crystal display device featuring excellent color reproducibility. The liquid crystal display panel includes: a liquid crystal display panel outputting different colors on a per-pixel basis; and a backlight. The backlight includes: a light source; a light guide; a reflective sheet on a back side of the light guide; and a group of optical sheets including a wavelength converter and disposed between the liquid crystal display panel and the light guide. The wavelength converter has a structure where quantum dots are dispersed in a transparent medium. The wavelength converter is bonded to another optical medium by means of a diffusing adhesive. Nanoparticles for developing Rayleigh scattering are dispersed in the wavelength converter.Type: ApplicationFiled: January 31, 2017Publication date: August 10, 2017Inventors: Masaki NISHIKAWA, Tetsuya OOSHIMA, Yasuhisa SHIRAISHI, Masateru MORIMOTO
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Publication number: 20160187722Abstract: In an FFS liquid crystal display device, viewing angle characteristics are further improved. In an FFS liquid crystal display device, the alignment axis of a first alignment film of a first substrate and the alignment axis of a second alignment film of a second substrate are directed in the same direction. At least two of an upper polarizer, a lower polarizer, or a retardation plate 160 satisfy conditions below. (1) The absorption axis of the upper polarizer forms an angle of one to 45 degrees inclusive with the alignment axis. (2) The absorption axis of the lower polarizer forms an angle of 91 to 135 degrees inclusive or forms an angle of 45 to 89 degrees inclusive with the alignment axis. (3) The extension axis of the retardation plate 160 forms an angle of one to 45 degrees inclusive with the alignment axis.Type: ApplicationFiled: December 29, 2015Publication date: June 30, 2016Inventors: Masaki NISHIKAWA, Tetsuya OOSHIMA
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Patent number: 8054288Abstract: An object of the present invention is to realize an image display device for color display with high luminance and high contrast. In the present invention, a unit cell 111 is filled with electrophoresis ink including two kinds of particles different in chargeability and color being dispersed in transmissive solvent 107. Voltage is applied to an opposite electrode 103, a stacked lower electrode 104 and an upper electrode 105 and thereby electrically charged particles 108a and charged particles 108b are moved to a first opening 106a and a second opening 106b where an insulating layer 110 is provided on the lower electrode 104 and the upper electrode 105. Thus assemblage and diffusion state of two kinds of particles are controlled. Thereby, a unit cell 111 obtains four display colors. Since the lower electrode 104 can be made to be a reflecting layer covering the entire unit cell, it is possible to make the aperture ratio large and the reflection percentage large.Type: GrantFiled: May 16, 2007Date of Patent: November 8, 2011Assignee: Hitachi, Ltd.Inventors: Tatsuya Sugita, Tetsuya Ooshima
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Patent number: 7990369Abstract: An image display apparatus configured by a display panel having an image memory element in a pixel, which achieves low power consumption. A nonvolatile image memory element 1, which can change the resistance value by phase change, is connected to a pixel electrode 25 of a liquid crystal element 5. The output of a thin-film transistor 17 driven by scanning and signal electrode lines 7, 9 is connected to the pixel electrode 25. When the scanning electrode line 7 is selected to have a high level voltage, the thin-film transistor 17 is turned on and a current signal flowing through the signal electrode 9 is sent through the image memory element 1 to a reference electrode line 15. Depending on the current value or pulse width passing through the image memory element 1, the resistance of the image memory element 1 is changed and is stored as a resistance value.Type: GrantFiled: May 24, 2007Date of Patent: August 2, 2011Assignee: Hitachi Displays, Ltd.Inventors: Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Tsunenori Yamamoto, Tetsuya Ooshima, Susumu Edo, Akitoyo Konno
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Publication number: 20070268245Abstract: An object of the present invention is to realize an image display device for color display with high luminance and high contrast. In the present invention, a unit cell 111 is filled with electrophoresis ink including two kinds of particles different in chargeability and color being dispersed in transmissive solvent 107. Voltage is applied to an opposite electrode 103, a stacked lower electrode 104 and an upper electrode 105 and thereby electrically charged particles 108a and charged particles 108b are moved to a first opening 106a and a second opening 106b where an insulating layer 110 is provided on the lower electrode 104 and the upper electrode 105. Thus assemblage and diffusion state of two kinds of particles are controlled. Thereby, a unit cell 111 obtains four display colors. Since the lower electrode 104 can be made to be a reflecting layer covering the entire unit cell, it is possible to make the aperture ratio large and the reflection percentage large.Type: ApplicationFiled: May 16, 2007Publication date: November 22, 2007Inventors: Tatsuya Sugita, Tetsuya Ooshima
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Publication number: 20070222723Abstract: An image display apparatus configured by a display panel having an image memory element in a pixel, which achieves low power consumption. A nonvolatile image memory element 1, which can change the resistance value by phase change, is connected to a pixel electrode 25 of a liquid crystal element 5. The output of a thin-film transistor 17 driven by scanning and signal electrode lines 7, 9 is connected to the pixel electrode 25. When the scanning electrode line 7 is selected to have a high level voltage, the thin-film transistor 17 is turned on and a current signal flowing through the signal electrode 9 is sent through the image memory element 1 to a reference electrode line 15. Depending on the current value or pulse width passing through the image memory element 1, the resistance of the image memory element 1 is changed and is stored as a resistance value.Type: ApplicationFiled: May 24, 2007Publication date: September 27, 2007Inventors: Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Tsunenori Yamamoto, Tetsuya Ooshima, Susumu Edo, Akitoyo Konno
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Patent number: 6956691Abstract: The present invention provides an electrophoretic display in which an insulating liquid is uniformly provided to the divided microspaces each corresponding to one pixel and display characteristics uniform over the display surface are actualized. The present invention includes a transparent first substrate 1 and a transparent second substrate 2 arranged with a predetermined gap therebetween, charged particles 6 dispersed in an insulating liquid 5 provided to the gap, and a first electrode 3 and a second electrode 4 arranged on either of the first substrate 1 and the second substrate 2, wherein liquid-repellency parts 8 and repellency-lowered parts 9 are arranged on the surface of the first substrate 1 and the surface of the second substrate 2, and the insulating liquid 5 is provided to the repellency-lowered parts on the surface of the first substrate 1 and the surface of the second substrate 2.Type: GrantFiled: December 16, 2004Date of Patent: October 18, 2005Assignee: Hitachi, Ltd.Inventors: Hiroki Kaneko, Tetsuya Ooshima, Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Hiroshi Sasaki
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Publication number: 20050111075Abstract: The present invention provides an electrophoretic display in which an insulating liquid is uniformly provided to the divided microspaces each corresponding to one pixel and display characteristics uniform over the display surface are actualized. The present invention includes a transparent first substrate 1 and a transparent second substrate 2 arranged with a predetermined gap therebetween, charged particles 6 dispersed in an insulating liquid 5 provided to the gap, and a first electrode 3 and a second electrode 4 arranged on either of the first substrate 1 and the second substrate 2, wherein liquid-repellency parts 8 and repellency-lowered parts 9 are arranged on the surface of the first substrate 1 and the surface of the second substrate 2, and the insulating liquid 5 is provided to the repellency-lowered parts on the surface of the first substrate 1 and the surface of the second substrate 2.Type: ApplicationFiled: December 16, 2004Publication date: May 26, 2005Inventors: Hiroki Kaneko, Tetsuya Ooshima, Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Hiroshi Sasaki
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Patent number: 6850357Abstract: The present invention provides an electrophoretic display in which an insulating liquid is uniformly provided to the divided microspaces each corresponding to one pixel and display characteristics uniform over the display surface are actualized. The present invention includes a transparent first substrate 1 and a transparent second substrate 2 arranged with a predetermined gap therebetween, charged particles 6 dispersed in an insulating liquid 5 provided to the gap, and a first electrode 3 and a second electrode 4 arranged on either of the first substrate 1 and the second substrate 2, wherein liquid-repellency parts 8 and repellency-lowered parts 9 are arranged on the surface of the first substrate 1 and the surface of the second substrate 2, and the insulating liquid 5 is provided to the repellency-lowered parts on the surface of the first substrate 1 and the surface of the second substrate 2.Type: GrantFiled: January 15, 2004Date of Patent: February 1, 2005Assignee: Hitachi, Ltd.Inventors: Hiroki Kaneko, Tetsuya Ooshima, Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Hiroshi Sasaki
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Publication number: 20040207568Abstract: In a portable information processing apparatus, frames 5 and 6 on which display devices are mounted are pivotally supported in a coupling portion 3 constituted by a hinge mechanism in an openable/closable manner, while the display devices have main displays 1 and 2, which perform printing with high-resolution quality. While the coupling portion 3 is set to a fulcrum, the main displays 1 and 2 are brought into such a two-page spreading condition for the use, and are overlapped with each other, and are folded into two displays for closure, so that the portable information processing apparatus can be carried. Since a rotation portion 4 is rotated, an image which is displayed on the main displays 1 and 2 can be changed. Both a power switch 7 and a function switch 8, which are necessary switches and the like, are mounted on an edge portion of the frame 6.Type: ApplicationFiled: March 25, 2004Publication date: October 21, 2004Applicant: HITACHI, LTD.Inventors: Tetsuya Ooshima, Shoichi Hirota, Hiroki Kaneko, Susumu Edo, Yoshifumi Sekiguchi, Tatsuya Sugita, Shinichi Komura, Masahiro Kawasaki
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Publication number: 20040184137Abstract: The present invention provides an electrophoretic display in which an insulating liquid is uniformly provided to the divided microspaces each corresponding to one pixel and display characteristics uniform over the display surface are actualized. The present invention includes a transparent first substrate 1 and a transparent second substrate 2 arranged with a predetermined gap therebetween, charged particles 6 dispersed in an insulating liquid 5 provided to the gap, and a first electrode 3 and a second electrode 4 arranged on either of the first substrate 1 and the second substrate 2, wherein liquid-repellency parts 8 and repellency-lowered parts 9 are arranged on the surface of the first substrate 1 and the surface of the second substrate 2, and the insulating liquid 5 is provided to the repellency-lowered parts on the surface of the first substrate 1 and the surface of the second substrate 2.Type: ApplicationFiled: January 15, 2004Publication date: September 23, 2004Applicant: HITACHI, LTD.Inventors: Hiroki Kaneko, Tetsuya Ooshima, Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Hiroshi Sasaki
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Publication number: 20040135763Abstract: An electrophoretic display comprising a first and second substrates each being disposed with a predetermined gap therebetween; a layer comprising an insulating solvent and charged particles dispersed in the insulating solvent, the layer being sandwiched between the substrates; a first electrode disposed on one of the substrates; and a second electrode disposed on the second substrate, wherein the second electrode has a reflector with uneven surface.Type: ApplicationFiled: July 24, 2003Publication date: July 15, 2004Inventors: Hiroki Kaneko, Shoichi Hirota, Tetsuya Ooshima, Masatoshi Wakagi, Shinichi Komura
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Publication number: 20040041761Abstract: An image display apparatus configured by a display panel having an image memory element in a pixel, which achieves low power consumption. A nonvolatile image memory element 1, which can change the resistance value by phase change, is connected to a pixel electrode 25 of a liquid crystal element 5. The output of a thin-film transistor 17 driven by scanning and signal electrode lines 7, 9 is connected to the pixel electrode 25. When the scanning electrode line 7 is selected to have a high level voltage, the thin-film transistor 17 is turned on and a current signal flowing through the signal electrode 9 is sent through the image memory element 1 to a reference electrode line 15. Depending on the current value or pulse width passing through the image memory element 1, the resistance of the image memory element 1 is changed and is stored as a resistance value.Type: ApplicationFiled: August 6, 2003Publication date: March 4, 2004Inventors: Tatsuya Sugita, Shinichi Komura, Shoichi Hirota, Tsunenori Yamamoto, Tetsuya Ooshima, Susumu Edo, Akitoyo Konno
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Patent number: 6513933Abstract: An image projector, having a light source, an LCD panel into which a light emitted from the light source enters, and a projection lens into which the light emitted from the LCD panel enters. There exists, in an entrance pupil of the projection lens, a range in which light emitted from respective pixels of the LCD panel overlap with each other at least in a horizontal direction. The image projector forms part of an image display.Type: GrantFiled: September 8, 2000Date of Patent: February 4, 2003Assignee: Hitachi, Ltd.Inventors: Hiroki Kaneko, Tetsuya Ooshima, Yoshiyuki Kaneko, Akira Arimoto, Osamu Ebina
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Patent number: 6437917Abstract: A display system has a directional reflection screen with a triangularly-shaped mirror sheet as horizontal focusing for observers and stereoscopic image projecting means. The directional reflection screen has a triangularly-shaped mirror sheet with included angles at least some of which are non-right angles. This enables a plurality of observers to simultaneously obtain a stereoscopic view using a binocular parallax without wearing special glasses and without having to position themselves in a very limited number of positions relative to the screen. Vertical diffusion can also be provided by using a lens sheet. The screen can be made concave in the horizontal or vertical directions, or both.Type: GrantFiled: June 12, 2000Date of Patent: August 20, 2002Assignee: Hitachi, Ltd.Inventors: Tetsuya Ooshima, Yoshiyuki Kaneko, Akira Arimoto
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Patent number: 6421174Abstract: A display system has a directional reflection screen with a triangularly-shaped mirror sheet as horizontal focusing for observers and stereoscopic image projecting means. The directional reflection screen has a triangularly-shaped mirror sheet with included angles at least some of which are non-right angles. This enables a plurality of observers to simultaneously obtain a stereoscopic view using a binocular parallax without wearing special glasses and without having to position themselves in a very limited number of positions relative to the screen. Vertical diffusion can also be provided by using a lens sheet. The screen can be made concave in the horizontal or vertical directions, or both.Type: GrantFiled: March 15, 2000Date of Patent: July 16, 2002Assignee: Hitachi, Ltd.Inventors: Tetsuya Ooshima, Yoshiyuki Kaneko, Akira Arimoto