Patents by Inventor Yohei Nakanishi
Yohei Nakanishi 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: 20050253988Abstract: It is an object of the invention to provide a substrate for a liquid crystal display having optical transmittance improved without reducing the speed of a response to a tone change and a liquid crystal display utilizing the same. There is provided a drain bus line formed on an array substrate which sandwiches a liquid crystal in combination with an opposite substrate provided in a face-to-face relationship therewith, a TFT connected to the drain bus line, and a pixel electrode which has stripe-shaped electrodes, along with spaces, connected to the TFT and provided in parallel with the drain bus line, stripe-shaped electrodes in the vicinity of the drain bus line having an electrode width formed narrower than the width of internal electrodes located inside the same.Type: ApplicationFiled: June 29, 2005Publication date: November 17, 2005Inventors: Yuichi Inoue, Kazutaka Hanaoka, Yohei Nakanishi, Masakazu Shibasaki, Kimiaki Nakamura, Yoshio Koike, Takahiro Sasaki, Shingo Kataoka
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Patent number: 6952252Abstract: It is an object of the invention to provide a substrate for a liquid crystal display having optical transmittance improved without reducing the speed of a response to a tone change and a liquid crystal display utilizing the same. There is provided a drain bus line formed on an array substrate which sandwiches a liquid crystal in combination with an opposite substrate provided in a face-to-face relationship therewith, a TFT connected to the drain bus line, and a pixel electrode which has stripe-shaped electrodes, along with spaces, connected to the TFT and provided in parallel with the drain bus line, stripe-shaped electrodes in the vicinity of the drain bus line having an electrode width formed narrower than the width of internal electrodes located inside the same.Type: GrantFiled: March 29, 2002Date of Patent: October 4, 2005Assignee: Fujitsu Display Technologies CorporationInventor: Yohei Nakanishi
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Publication number: 20050200789Abstract: In the middle of each picture element electrode on a TFT substrate, a slit parallel to gate bus lines is formed. On a counter substrate, protrusions are formed. Each protrusion includes a protrusion placed along the left edge of the upper half of a picture element electrode, a protrusion horizontally extending from the middle of the preceding protrusion, a protrusion placed along the right edge of the lower half of the picture element electrode, and a protrusion horizontally extending from the middle of the preceding protrusion. Liquid crystal molecules are aligned with directions of approximately 45° relative to the protrusions and the edges of the picture element electrodes.Type: ApplicationFiled: September 7, 2004Publication date: September 15, 2005Inventor: Yohei Nakanishi
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Patent number: 6927824Abstract: In a vertically aligned liquid crystal display device for controlling liquid crystal molecules alignment in voltage application by providing linear structures or linear slits consisting of a plurality of constituent units to at least one of a pair of substrates having an electrode thereon, there is provided alignment controlling means for forming an alignment singular point s=?1 of liquid crystal molecules at an intersecting point between the structures on the pixel electrode or the slits in the electrode and an edge of a pixel electrode on one of the substrates.Type: GrantFiled: September 14, 2000Date of Patent: August 9, 2005Assignee: Fujitsu Display Technologies CorporationInventors: Arihiro Takeda, Yoshio Koike, Takahiro Sasaki, Kouji Tsukao, Shingo Kataoka, Kimiaki Nakamura, Yuichi Inoue, Kazutaka Hanaoka, Seiji Tanuma, Takatoshi Mayama, Hidefumi Yoshida, Yasutoshi Tasaka, Takashi Sasabayashi, Yohei Nakanishi
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Publication number: 20050168676Abstract: The invention relates to a manufacturing method of a liquid crystal display device in which an alignment direction of a liquid crystal molecule at the time of driving is regulated by using a polymer, and has an object to provide a manufacturing method of a liquid crystal display device in which excellent display characteristics can be obtained. A liquid crystal layer containing a polymerizable component capable of being polymerized by light is sealed between two substrates arranged to be opposite to each other, the polymerizable component is polymerized by irradiation of light under a predetermined light irradiation condition while a voltage is applied to the liquid crystal layer under a predetermined voltage application condition, and when a pre-tilt angle of a liquid crystal molecule and/or an alignment direction at a time of driving is regulated, at least one of the voltage application condition and the light irradiation condition is changed for each region.Type: ApplicationFiled: April 5, 2005Publication date: August 4, 2005Inventors: Katsuhiko Kishida, Yohei Nakanishi, Hideaki Tsuda, Kazutaka Hanaoka, Yuichi Inoue, Masakazu Shibasaki
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Publication number: 20050146664Abstract: The invention relates to a liquid crystal display based on an MVA mode of multi-division alignment in which alignment states of liquid crystal molecules having a negative dielectric anisotropy are made different from each other, and provides a liquid crystal display in which a drop in transmittance is suppressed and response characteristics are improved.Type: ApplicationFiled: January 5, 2005Publication date: July 7, 2005Applicant: Fujitsu Display Technologies CorporationInventors: Kazutaka Hanaoka, Seiji Tanuma, Yohei Nakanishi, Kazuya Ueda, Shingo Kataoka, Takahiro Sasaki, Arihiro Takeda, Hideaki Tsuda, Takatoshi Mayama, Yuichi Inoue, Norio Sugiura
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Patent number: 6903787Abstract: The invention relates to a manufacturing method of a liquid crystal display device in which an alignment direction of a liquid crystal molecule at the time of driving is regulated by using a polymer, and has an object to provide a manufacturing method of a liquid crystal display device in which excellent display characteristics can be obtained. A liquid crystal layer containing a polymerizable component capable of being polymerized by light is sealed between two substrates arranged to be opposite to each other, the polymerizable component is polymerized by irradiation of light under a predetermined light irradiation condition while a voltage is applied to the liquid crystal layer under a predetermined voltage application condition, and when a pre-tilt angle of a liquid crystal molecule and/or an alignment direction at a time of driving is regulated, at least one of the voltage application condition and the light irradiation condition is changed for each region.Type: GrantFiled: February 19, 2003Date of Patent: June 7, 2005Assignee: Fujitsu Display Technologies CorporationInventors: Katsuhiko Kishida, Yohei Nakanishi
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Publication number: 20050116200Abstract: A liquid crystal display device produced through the steps of injecting a polymerizable monomer-containing liquid crystal composition between two substrates and, while applying a voltage between opposing transparent electrodes of the substrates, polymerizing the monomer, wherein the polymerizable monomer contained in the liquid crystal composition has one or more ring or condensed ring structures and functional groups bonded directly to the ring or condensed ring structure. The monomer is preferably represented by the following general formula: P1-A1-(Z1-A2)n-P2 wherein P1 and P2 are acrylates or the like, A1 and A2 are 1,4-phenylenes or the like, Z1 is —COO— or the like, and n is 0 to 2.Type: ApplicationFiled: October 15, 2004Publication date: June 2, 2005Inventors: Yohei Nakanishi, Masakazu Shibasaki, Kazutaka Hanaoka, Yuichi Inoue, Kazuaki Tarumi, Matthias Bremer, Melanie Klasen-Memmer, Simon Greenfield, Richard Hardlng
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Patent number: 6897929Abstract: In a vertically aligned liquid crystal display device for controlling liquid crystal molecules alignment in voltage application by providing linear structures or linear slits consisting of a plurality of constituent units to at least one of a pair of substrates having an electrode thereon, there is provided alignment controlling means for forming an alignment singular point s=?1 of liquid crystal molecules at an intersecting point between the structures on the pixel electrode or the slits in the electrode and an edge of a pixel electrode on one of the substrates.Type: GrantFiled: September 8, 2003Date of Patent: May 24, 2005Assignee: Fujitsu Display Technologies CorporationInventors: Arihiro Takeda, Yoshio Koike, Takahiro Sasaki, Kouji Tsukao, Shingo Kataoka, Kimiaki Nakamura, Yuichi Inoue, Kazutaka Hanaoka, Seiji Tanuma, Takatoshi Mayama, Hidefumi Yoshida, Yasutoshi Tasaka, Takashi Sasabayashi, Yohei Nakanishi
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Patent number: 6894741Abstract: When radiating light onto a liquid crystal composition containing a photosensitive material, the alignment of liquid crystal molecules is adjusted by applying a voltage to the liquid crystal composition layer, to achieve substantially orderly alignment of the liquid crystal molecules, or the alignment of the liquid crystal molecules is made uniform by adjusting the structure of the liquid crystal display device, or any display defect is driven out of the display area. When radiating light to the liquid crystal composition containing the photosensitive material, the alignment of the liquid crystal molecules can be adjusted so as to achieve substantially orderly alignment of the liquid crystal molecules, and the liquid crystal display device can thus be driven stably.Type: GrantFiled: March 11, 2004Date of Patent: May 17, 2005Assignee: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Kazutaka Hanaoka, Yuichi Inoue, Masakazu Shibasaki
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Patent number: 6888602Abstract: In a vertically aligned liquid crystal display device for controlling liquid crystal molecules alignment in voltage application by providing linear structures or linear slits consisting of a plurality of constituent units to at least one of a pair of substrates having an electrode thereon, there is provided alignment controlling means for forming an alignment singular point s=?1 of liquid crystal molecules at an intersecting point between the structures on the pixel electrode or the slits in the electrode and an edge of a pixel electrode on one of the substrates.Type: GrantFiled: April 25, 2003Date of Patent: May 3, 2005Assignee: Fujitsu Display Technologies CorporationInventors: Arihiro Takeda, Yoshio Koike, Takahiro Sasaki, Kouji Tsukao, Shingo Kataoka, Kimiaki Nakamura, Yuichi Inoue, Kazutaka Hanaoka, Seiji Tanuma, Takatoshi Mayama, Hidefumi Yoshida, Yasutoshi Tasaka, Takashi Sasabayashi, Yohei Nakanishi
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Publication number: 20050018119Abstract: In a vertically aligned liquid crystal display device for controlling liquid crystal molecules alignment in voltage application by providing linear structures or linear slits consisting of a plurality of constituent units to at least one of a pair of substrates having an electrode thereon, there is provided alignment controlling means for forming an alignment singular point s=?1 of liquid crystal molecules at an intersecting point between the structures on the pixel electrode or the slits in the electrode and an edge of a pixel electrode on one of the substrates.Type: ApplicationFiled: August 20, 2004Publication date: January 27, 2005Applicant: FUJITSU DISPLAY TECHNOLOGIES CORPORATIONInventors: Arihiro Takeda, Yoshio Koike, Takahiro Sasaki, Kouji Tsukao, Shingo Kataoka, Kimiaki Nakamura, Yuichi Inoue, Kazutaka Hanaoka, Seiji Tanuma, Takatoshi Mayama, Hidefumi Yoshida, Yasutoshi Tasaka, Takashi Sasabayashi, Yohei Nakanishi
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Publication number: 20050001973Abstract: The invention relates to a liquid crystal display in which a polymeric component included in a liquid crystal layer is polymerized while adjusting a voltage applied to the liquid crystal layer to regulate the direction of alignment of liquid crystal molecules during polymerization and a method of manufacturing the same. The invention provides a liquid crystal display in which image sticking is mitigated and a method of manufacturing the same. In a method of manufacturing a liquid crystal display in which a liquid crystal composition including a polymeric component that is optically or thermally polymerized is sealed between substrates and in which the polymeric component is polymerized while applying a voltage to the liquid crystal composition to regulate the direction of alignment of liquid crystal molecules during driving, a configuration is employed such that a polymerization initiator in the liquid crystal composition has a concentration x that satisfies 0?x?0.Type: ApplicationFiled: July 15, 2004Publication date: January 6, 2005Applicant: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Hiroyasu Inoue, Yuji Nakahata, Kengo Kanii, Kazutaka Hanaoka, Masakazu Shibasaki, Yuichi Inoue
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Patent number: 6819384Abstract: AC voltage of rectangular wave is applied between a pixel electrode 25A and a common electrode 23A, and the amplitude Vac of the AC voltage component and the DC voltage component Vdc thereof are changed to measure the range of optimal DC component variation &Dgr;Vdc and determine a structure or material of a liquid crystal display device so as to lower &Dgr;Vdc less than a given value, wherein &Dgr;Vdc=|Vdcb−Vdcw|, Vdcb is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying black (2V), and Vdcw is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying white (7 V). Thickness of an insulating layer 26A on the pixel electrode 25A and on the common electrode 23A are the same. Electrode crossover portions are made to be in axial symmetry. The top surface of each stripe electrode of a pixel electrode has convex shape in cross section.Type: GrantFiled: August 9, 2001Date of Patent: November 16, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Hidefumi Yoshida, Takashi Sasabayashi, Yasutoshi Tasaka
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Publication number: 20040189924Abstract: A liquid crystal display device includes a liquid crystal layer confined between first and second substrates, an electrode formed on the first substrate so as to create an electric field acting generally parallel to a plane of the liquid crystal layer, and a plurality of pixels being defined in the liquid crystal layer, wherein each of the pixels includes therein a plurality of domains having respective orientations for liquid crystal molecules, such that the orientation is different between a domain and another domain within the plane of the liquid crystal layer.Type: ApplicationFiled: April 8, 2004Publication date: September 30, 2004Applicant: FUJITSU DISPLAY TECHNOLOGIES CORPORATIONInventors: Yohei Nakanishi, Seiji Tanuma, Takatoshi Mayama
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Patent number: 6791650Abstract: A vertically aligned liquid crystal display device includes a site in a liquid crystal layer in which liquid crystal molecules are tilted in a predetermined direction in a non-activated state of the liquid crystal display device.Type: GrantFiled: March 31, 1999Date of Patent: September 14, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Seiji Tanuma, Yohei Nakanishi, Takatoshi Mayama
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Publication number: 20040174471Abstract: When radiating light onto a liquid crystal composition containing a photosensitive material, the alignment of liquid crystal molecules is adjusted by applying a voltage to the liquid crystal composition layer, to achieve substantially orderly alignment of the liquid crystal molecules, or the alignment of the liquid crystal molecules is made uniform by adjusting the structure of the liquid crystal display device, or any display defect is driven out of the display area. When radiating light to the liquid crystal composition containing the photosensitive material, the alignment of the liquid crystal molecules can be adjusted so as to achieve substantially orderly alignment of the liquid crystal molecules, and the liquid crystal display device can thus be driven stably.Type: ApplicationFiled: March 11, 2004Publication date: September 9, 2004Applicant: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Kazutaka Hanaoka, Yuichi Inoue, Masakazu Shibasaki
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Publication number: 20040169806Abstract: In a vertically aligned liquid crystal display device for controlling liquid crystal molecules alignment in voltage application by providing linear structures or linear slits consisting of a plurality of constituent units to at least one of a pair of substrates having an electrode thereon, there is provided alignment controlling means for forming an alignment singular point s=−1 of liquid crystal molecules at an intersecting point between the structures on the pixel electrode or the slits in the electrode and an edge of a pixel electrode on one of the substrates.Type: ApplicationFiled: March 2, 2004Publication date: September 2, 2004Applicants: Fujitsu Limited, FUJITSU DISPLAY TECHNOLOGIES CORPORATIONInventors: Arihiro Takeda, Yoshio Koike, Takahiro Sasaki, Kouji Tsukao, Shingo Kataoka, Kimiaki Nakamura, Yuichi Inoue, Kazutaka Hanaoka, Seiji Tanuma, Takatoshi Mayama, Hidefumi Shida, Yasutoshi Tasaka, Takashi Sasabayashi, Yohei Nakanishi
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Patent number: 6781665Abstract: The invention relates to a liquid crystal display in which a polymeric component included in a liquid crystal layer is polymerized while adjusting a voltage applied to the liquid crystal layer to regulate the direction of alignment of liquid crystal molecules during polymerization and a method of manufacturing the same. The invention provides a liquid crystal display in which image sticking is mitigated and a method of manufacturing the same. In a method of manufacturing a liquid crystal display in which a liquid crystal composition including a polymeric component that is optically or thermally polymerized is sealed between substrates and in which the polymeric component is polymerized while applying a voltage to the liquid crystal composition to regulate the direction of alignment of liquid crystal molecules during driving, a configuration is employed such that a polymerization initiator in the liquid crystal composition has a concentration x that satisfies 0≦x≦0.Type: GrantFiled: January 30, 2003Date of Patent: August 24, 2004Assignee: Fujitsu Display Technologies CorporationInventors: Yohei Nakanishi, Hiroyasu Inoue, Yuji Nakahata, Kengo Kanii, Kazutaka Hanaoka, Masakazu Shibasaki, Yuichi Inoue
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Publication number: 20040141134Abstract: AC voltage of rectangular wave is applied between a pixel electrode 25A and a common electrode 23A, and the amplitude Vac of the AC voltage component and the DC voltage component Vdc thereof are changed to measure the range of optimal DC component variation &Dgr;Vdc and determine a structure or material of a liquid crystal display device so as to lower &Dgr;Vdc less than a given value, wherein &Dgr;Vdc=Vdcb−Vdcw|, Vdcb is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying black (2V), and Vdcw is the value of Vdc at which the range of transmittance variation is the minimum with Vac being fixed at a value for displaying white (7 V). Thickness of an insulating layer 26A on the pixel electrode 25A and on the common electrode 23A are the same. Electrode crossover portions are made to be in axial symmetry. The top surface of each stripe electrode of a pixel electrode has convex shape in cross section.Type: ApplicationFiled: December 29, 2003Publication date: July 22, 2004Applicant: Fujitsu LimitedInventors: Yohei Nakanishi, Hidefumi Yoshida, Takashi Sasabayashi, Yasutoshi Tasaka, Tetsuya Fujikawa, Hidetoshi Sukenori