Patents by Inventor Kiyomi Kawada
Kiyomi Kawada 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: 8049848Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: GrantFiled: September 23, 2009Date of Patent: November 1, 2011Assignee: NEC CorporationInventors: Ken-ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Publication number: 20100066964Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: ApplicationFiled: September 23, 2009Publication date: March 18, 2010Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Patent number: 7612848Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: GrantFiled: March 28, 2007Date of Patent: November 3, 2009Assignee: NEC CorporationInventors: Ken-ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Publication number: 20070165172Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: ApplicationFiled: March 28, 2007Publication date: July 19, 2007Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Patent number: 7245343Abstract: To provide a liquid crystal device a liquid crystal display having a high contrast over wide viewing angles while reducing the color distortion. A liquid crystal display device comprises a first substrate on which a plurality of pixel electrodes are formed, a second substrate on which an opposing electrode is formed, and a liquid crystal layer sandwiched between the first and second substrates, the second substrate further having thereon a plurality of protrusions, each of the protrusions being positioned at a substantially central portion of a corresponding one of the pixel electrodes.Type: GrantFiled: December 14, 2001Date of Patent: July 17, 2007Assignee: NEC LCD Technologies, Ltd.Inventors: Masayoshi Suzuki, Toshiya Ishii, Seiji Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Yoshihiko Hirai
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Patent number: 7212270Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: GrantFiled: September 23, 2004Date of Patent: May 1, 2007Assignee: NEC CorporationInventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Patent number: 6927822Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.Type: GrantFiled: June 2, 2004Date of Patent: August 9, 2005Assignee: NEC LCD TechnologiesInventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
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Publication number: 20050036096Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: ApplicationFiled: September 23, 2004Publication date: February 17, 2005Applicant: NEC CORPORATIONInventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Publication number: 20040218128Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.Type: ApplicationFiled: June 2, 2004Publication date: November 4, 2004Applicant: NEC LCD Technologies, Ltd.Inventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
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Patent number: 6812986Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: GrantFiled: September 23, 2002Date of Patent: November 2, 2004Assignee: NEC CorporationInventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Patent number: 6768530Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.Type: GrantFiled: December 20, 2000Date of Patent: July 27, 2004Assignee: NEC CorporationInventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
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Patent number: 6750934Abstract: A VA (Vertical Aligned) type active-matrix liquid crystal display capable of stabilizing a boundary position between divided areas (alignment areas). The liquid crystal display comprises a TFT (thin film transistor) substrate including a pixel electrode provided for each pixel and a driving element such as a TFT provided for each pixel electrode, an opposite substrate disposed opposite to the TFT substrate and including an opposite electrode, and a liquid crystal layer sandwiched between the TFT substrate and the opposite substrate. Each pixel electrode has a recess in groove shape formed therein. The pixel electrode preferably has a generally rectangular shape. The recess is provided such that it extends from one of a pair of opposite sides of the pixel electrode to the other to divide the pixel electrode into two parts.Type: GrantFiled: December 18, 2000Date of Patent: June 15, 2004Assignee: NEC LCD Technologies, Ltd.Inventors: Michiaki Sakamoto, Yuji Yamamoto, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Patent number: 6650390Abstract: A liquid crystal display panel comprises a TFT substrate unit having a thin film transistor (TFT), a control electrode connected to the TFT, a flattening film covering the control electrode, and a pixel electrode having a cross slit and formed on the flattening film and insulated from the control electrode. An opposite substrate unit has an opposite electrode facing the pixel electrode at a predetermined position. A liquid crystal layer disposed between the TFT substrate unit and the opposite substrate includes liquid crystal molecules having negative dielectric aeolotropy. When voltage is supplied between the control electrode and the opposite electrode, an electric field is generated between them. The electric field divides the liquid crystal layer into four domains in each pixel according to the cross slit formed in the pixel electrode.Type: GrantFiled: March 2, 2001Date of Patent: November 18, 2003Assignee: NEC LCD Technologies, Inc.Inventors: Michiaki Sakamoto, Teruaki Suzuki, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Yuji Yamamoto
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Publication number: 20030025865Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: ApplicationFiled: September 23, 2002Publication date: February 6, 2003Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Publication number: 20030016325Abstract: A polarizer and a ¼ wavelength plate are bonded to each of first and second substrates of a liquid crystal panel that includes a liquid crystal layer having a bend alignment such that an angle between an optical axis of the ¼ wavelength plate and a transmission axis of the polarizer is made 45° relative to each other to make circularly polarized lights outputted respectively from the ¼ wavelength plate and the polarizer each have a polarity opposite each other. In this case, since a light inputted to a liquid crystal display device is converted into a circularly polarized light before entering a liquid crystal layer, the maximum value of an intensity of the light exited from the device becomes constant regardless of the orientation of the optical axis of the liquid crystal layer 101.Type: ApplicationFiled: July 19, 2002Publication date: January 23, 2003Applicant: NEC CorporationInventors: Takayuki Konno, Masayoshi Suzuki, Toshiya Ishii, Kiyomi Kawada, Hiroaki Matsuyama, Yoshihiko Hirai
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Patent number: 6504592Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.Type: GrantFiled: June 13, 2000Date of Patent: January 7, 2003Assignee: NEC CorporationInventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
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Publication number: 20020080320Abstract: To provide a liquid crystal device a liquid crystal display having a high contrast over wide viewing angles while reducing the color distortion.Type: ApplicationFiled: December 14, 2001Publication date: June 27, 2002Inventors: Masayoshi Suzuki, Toshiya Ishii, Seiji Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Yoshihiko Hirai
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Publication number: 20010019392Abstract: A liquid crystal display panel comprises a TFT substrate unit having a thin film transistor (TFT), a control electrode connected to the TFT, a flattening film covers the control electrode, and a pixel electrode having a cross slit and formed on the flattening film and insulated from the control electrode. An opposite substrate unit has an opposite electrode facing the pixel electrode at predetermined space. A liquid crystal layer disposed between the TFT substrate unit and the opposite substrate and includes liquid crystal molecules having negative dielectric aeolotropy. When voltage is supplied between the control electrode and the opposite electrode, an electric field is generated between them. The electric field divides the liquid crystal layer into four domains in each pixel according to the cross slit formed in the pixel electrode.Type: ApplicationFiled: March 2, 2001Publication date: September 6, 2001Applicant: NEC CORPORATIONInventors: Michiaki Sakamoto, Teruaki Suzuki, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Yuji Yamamoto
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Publication number: 20010006408Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.Type: ApplicationFiled: December 20, 2000Publication date: July 5, 2001Inventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
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Publication number: 20010004274Abstract: A VA (Vertical Aligned) type active-matrix liquid crystal display capable of stabilizing a boundary position between divided areas (alignment areas). The liquid crystal display comprises a TFT (thin film transistor) substrate including a pixel electrode provided for each pixel and a driving element such as a TFT provided for each pixel electrode, an opposite substrate disposed opposite to the TFT substrate and including an opposite electrode, and a liquid crystal layer sandwiched between the TFT substrate and the opposite substrate. Each pixel electrode has a recess in groove shape formed therein. The pixel electrode preferably has a generally rectangular shape. The recess is provided such that it extends from one of a pair of opposite sides of the pixel electrode to the other to divide the pixel electrode into two parts.Type: ApplicationFiled: December 18, 2000Publication date: June 21, 2001Applicant: NEC CorporationInventors: Michiaki Sakamoto, Yuji Yamamoto, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai