Patents by Inventor Yoshiteru Tomizuka
Yoshiteru Tomizuka 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: 8582041Abstract: Moirés due to interference between two liquid crystal display panels in a display device which achieves three-dimensional displaying by using two liquid crystal display panels is to be prevented. By disposing a lenticular lens array between an upper liquid crystal display panel and a lower liquid crystal display panel, moirés and image blurs are prevented. This configuration can prevent the luminance levels and contrast of images from dropping.Type: GrantFiled: September 26, 2007Date of Patent: November 12, 2013Assignees: Hitachi Displays, Ltd., Panasonid Liquid Crystal Co., Ltd.Inventors: Yoshiteru Tomizuka, Kentaro Oku, Yoshinori Tanaka, Yoshiharu Nagae
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Patent number: 8054401Abstract: A display device includes a display panel having a front surface and a back surface, a first and second frame, a first elastic member arranged between the first frame and the front surface of the display panel, and a second elastic member arranged between the second frame and the back surface of the display panel, the second elastic member extending in parallel to the first elastic member. A hardness of the first elastic member varies along an elongated direction of the first elastic member so as to have a high-hardness portion, and wherein a hardness of a first portion of the second elastic member which corresponds in location to the high-hardness portion of the first elastic member has a low hardness, a hardness of a second portion of the second elastic member which corresponds in location to the low-harness portion of the first elastic member has a high hardness.Type: GrantFiled: February 2, 2011Date of Patent: November 8, 2011Assignee: Hitachi Displays, Ltd.Inventors: Masaki Tsubokura, Yasuharu Yatsu, Tatsuyuki Fumikura, Yoshiteru Tomizuka
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Publication number: 20110122335Abstract: A display device includes a display panel having a front surface and a back surface, a first and second frame, a first elastic member arranged between the first frame and the front surface of the display panel, and a second elastic member arranged between the second frame and the back surface of the display panel, the second elastic member extending in parallel to the first elastic member. A hardness of the first elastic member varies along an elongated direction of the first elastic member so as to have a high-hardness portion, and wherein a hardness of a first portion of the second elastic member which corresponds in location to the high-hardness portion of the first elastic member has a low hardness, a hardness of a second portion of the second elastic member which corresponds in location to the low-harness portion of the first elastic member has a high hardness.Type: ApplicationFiled: February 2, 2011Publication date: May 26, 2011Inventors: Masaki Tsubokura, Yasuharu Yatsu, Tatsuyuki Fumikura, Yoshiteru Tomizuka
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Patent number: 7889287Abstract: A display device includes a display panel, a frame, an elastic spacer arranged on a peripheral portion of the display panel in parallel to the edge of the display panel, the elastic spacer being arranged between the display panel and the frame. A hardness of the elastic spacer varies along the length-side direction of the elastic spacer.Type: GrantFiled: May 21, 2008Date of Patent: February 15, 2011Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventors: Masaki Tsubokura, Yasuharu Yatsu, Tatsuyuki Fumikura, Yoshiteru Tomizuka
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Publication number: 20100253883Abstract: The present invention provides a liquid crystal display device, wherein the backlight has a light guiding plate, a first light source group made up of light sources aligned along a first side of the light guiding plate and a second light source group made up of light sources aligned along a second side that faces the first side, the first light source group has a first region where the distance between adjacent light sources is a first distance and a second region where the distance between adjacent light sources is a second distance that is smaller than the first distance, the second light source group has a third region facing the first region and a fourth region facing the second region, the third distance between adjacent light sources in the third region is smaller than the fourth distance between adjacent light sources in the fourth region, and semiconductor devices are positioned so as to face the first region.Type: ApplicationFiled: March 29, 2010Publication date: October 7, 2010Inventor: Yoshiteru TOMIZUKA
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Patent number: 7679691Abstract: The present invention prevents a moiré generated by the interference of two liquid crystal display panels in a display device capable of performing a three-dimensional display using two liquid crystal display panels. By arranging an upper lens array and a lower lens array between an upper liquid crystal display panel and a lower liquid crystal display panel, a moiré and smearing of an image can be prevented. Due to such a constitution, lowering of brightness and contrast can be suppressed.Type: GrantFiled: January 30, 2008Date of Patent: March 16, 2010Assignee: Hitachi Displays, Ltd.Inventors: Yoshiteru Tomizuka, Kentaro Oku, Yoshinori Tanaka, Yoshiharu Nagae
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Patent number: 7492577Abstract: A display device includes a fixed first display element and a movable second display element, the first display element and the second display element assume a first state in which the first display element and the second display element are arranged individually and a second state in which the first display element and the second display element are arranged individually in an overlapped manner.Type: GrantFiled: December 13, 2005Date of Patent: February 17, 2009Assignee: Hitachi Displays, Ltd.Inventors: Yoshiteru Tomizuka, Yasunari Kochi, Kazuhiko Yanagawa, Nobutaka Jin
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Publication number: 20080225199Abstract: A display device includes a display panel, a frame, an elastic spacer arranged on a peripheral portion of the display panel in parallel to the edge of the display panel, the elastic spacer being arranged between the display panel and the frame. A hardness of the elastic spacer varies along the length-side direction of the elastic spacer.Type: ApplicationFiled: May 21, 2008Publication date: September 18, 2008Inventors: Masaki TSUBOKURA, Yasuhara YATSU, Tatsuyuki FUMIKURA, Yoshiteru TOMIZUKA
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Publication number: 20080180587Abstract: The present invention prevents a moiré generated by the interference of two liquid crystal display panels in a display device capable of performing a three-dimensional display using two liquid crystal display panels. By arranging an upper lens array and a lower lens array between an upper liquid crystal display panel and a lower liquid crystal display panel, a moiré and smearing of an image can be prevented. Due to such a constitution, lowering of brightness and contrast can be suppressed.Type: ApplicationFiled: January 30, 2008Publication date: July 31, 2008Inventors: Yoshiteru Tomizuka, Kentaro Oku, Yoshinori Tanaka, Yoshiharu Nagae
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Publication number: 20080180586Abstract: Moirés due to interference between two liquid crystal display panels in a display device which achieves three-dimensional displaying by using two liquid crystal display panels is to be prevented. By disposing a lenticular lens array between an upper liquid crystal display panel and a lower liquid crystal display panel, moirés and image blurs are prevented. This configuration can prevent the luminance levels and contrast of images from dropping.Type: ApplicationFiled: September 26, 2007Publication date: July 31, 2008Inventors: YOSHITERU TOMIZUKA, Kentaro Oku, Yoshinori Tanaka, Yoshiharu Nagae
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Patent number: 7379128Abstract: A display device has a display panel, a frame, and an elastic spacer arranged on the periphery of the display panel in parallel to the edge of the display panel. The elastic spacer is arranged between the display panel and the frame, and the hardness of the elastic spacer is varied along the length-side direction of the elastic spacer.Type: GrantFiled: September 17, 2004Date of Patent: May 27, 2008Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventors: Masaki Tsubokura, Yasuharu Yatsu, Tatsuyuki Fumikura, Yoshiteru Tomizuka
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Publication number: 20060197716Abstract: The present invention provides a display device which can provide a stereoscopic display to a viewer by overlapping a plurality of sheets of liquid crystal panels. A front liquid crystal panel and a rear liquid crystal panel are overlapped to each other. The display device also includes a TCON board on which timing controllers which are connected with a front liquid crystal panel and a rear liquid crystal panel are arranged. The timing controllers output output I/F signals to the front liquid crystal panel and the rear liquid crystal panel based on input I/F signals which are inputted from an external image signal source.Type: ApplicationFiled: February 27, 2006Publication date: September 7, 2006Inventors: Yoshinori Tanaka, Tomohide Oohira, Hiroshi Yoshioka, Yoshiteru Tomizuka, Satoshi Takahashi
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Publication number: 20060133047Abstract: A display device includes a fixed first display element and a movable second display element, the first display element and the second display element assume a first state in which the first display element and the second display element are arranged individually and a second state in which the first display element and the second display element are arranged individually in an overlapped manner.Type: ApplicationFiled: December 13, 2005Publication date: June 22, 2006Inventors: Yoshiteru Tomizuka, Yasunari Kochi, Kazuhiko Yanagawa, Nobutaka Jin
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Publication number: 20050057703Abstract: A display device has a display panel, a frame, and an elastic spacer arranged on the periphery of the display panel in parallel to the edge of the display panel. The elastic spacer is arranged between the display panel and the frame, and the hardness of the elastic spacer is varied along the length-side direction of the elastic spacer.Type: ApplicationFiled: September 17, 2004Publication date: March 17, 2005Inventors: Masaki Tsubokura, Yasuharu Yatsu, Tatsuyuki Fumikura, Yoshiteru Tomizuka
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Patent number: 6867841Abstract: The invention provides a high quality liquid crystal panel with low non-uniformity by enveloping a pair of glass substrates sandwiching an uncured thermosetting seal member with heat-resistant metal sheets, bringing the insides of the sheets into a substantially hermetically closed state to decompress the space around the substrates, pressing the glass substrates and the seal member by a pressure difference from the atmospheric pressure in a predetermined space created by the enveloping sheets, heating the sheets, the glass substrates and the seal member with a heater disposed at a position remote from the sheet and curing the seal member, and maintaining the gap between the pair of glass substrates to prevent non-uniformity of the gap between the pair of glass substrates constituting the liquid crystal panel.Type: GrantFiled: December 27, 2002Date of Patent: March 15, 2005Assignee: Hitachi, Ltd.Inventors: Nobuaki Nakasu, Hiroyasu Matsuura, Toshiyuki Koshita, Mitsuaki Shiba, Hitoshi Azuma, Yoshiteru Tomizuka, Tsuneo Okada
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Publication number: 20040032563Abstract: The invention provides a high quality liquid crystal panel with low non-uniformity by enveloping a pair of glass substrates sandwiching an uncured thermosetting seal member with heat-resistant metal sheets, bringing the insides of the sheets into a substantially hermetically closed state to decompress the space around the substrates, pressing the glass substrates and the seal member by a pressure difference from the atmospheric pressure in a predetermined space created by the enveloping sheets, heating the sheets, the glass substrates and the seal member with a heater disposed at a position remote from the sheet and curing the seal member, and maintaining the gap between the pair of glass substrates to prevent non-uniformity of the gap between the pair of glass substrates constituting the liquid crystal panel.Type: ApplicationFiled: December 27, 2002Publication date: February 19, 2004Applicant: Hitachi, Ltd.Inventors: Nobuaki Nakasu, Hiroyasu Matsuura, Toshiyuki Koshita, Mitsuaki Shiba, Hitoshi Azuma, Yoshiteru Tomizuka, Tsuneo Okada