Patents by Inventor Kazuhiko Tsuda

Kazuhiko Tsuda 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).

  • Publication number: 20090252825
    Abstract: An antireflective member according to the present invention has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following Inequality (1): ? ? ? x , y ? min < 1 ni + ni · sin ? ? ? ? ? i max ( 1 ) where ?min is the shortest wavelength of the incoming light ray, ?imax is the largest angle of incidence of the incoming light ray, ni is the refractive-index of an incidence medium, ?x is the period of the uneven surface pattern in the x direction, and ?y is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.
    Type: Application
    Filed: March 26, 2009
    Publication date: October 8, 2009
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Tokio Taguchi, Shun Ueki, Kozo Nakamura, Kazuhiko Tsuda
  • Patent number: 7599021
    Abstract: A liquid crystal display device includes, from its back surface side towards its front surface side: a polarization selective reflection plate (12) which reflects x-directional linearly polarized light and transmits y-directional linearly polarized light; a first polarizing plate (4) which transmits the x-directional linearly polarized light; a liquid crystal display panel (13); and a second polarizing plate (8) which transmits the y-directional linearly polarized light. The polarization selective reflection plate (12) is arranged only on a back surface side of the liquid crystal display panel (13). The y-directional linearly polarized light incident on the back surface side is reflected from the polarization selective reflection plate (12), there by protecting privacy. The x-directional linearly polarized light transmitted reaches the front surface side, via the first polarizing plate (4), the liquid crystal display panel (13), and the second polarizing plate (8).
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: October 6, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Shun Ueki, Kozo Nakamura, Tokio Taguchi
  • Publication number: 20090211912
    Abstract: An antireflective member according to the present invention has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following Inequality (1): ? ? ? x , y ? min < 1 ni + ni · sin ? ? ? ? ? i max ( 1 ) where ?min is the shortest wavelength of the incoming light ray, ?imax is the largest angle of incidence of the incoming light ray, ni is the refractive index of an incidence medium, ?x is the period of the uneven surface pattern in the x direction, and ?y is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.
    Type: Application
    Filed: March 26, 2009
    Publication date: August 27, 2009
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Tokio TAGUCHI, Shun UEKI, Kozo NAKAMURA, Kazuhiko TSUDA
  • Patent number: 7561231
    Abstract: A double-sided display which can suitable carry out black display both in a well-lighted place and a dark place is provided. The following members are disposed in the B direction: a first polarizing plate (14) which allows only a linearly polarized light component to pass through; a liquid crystal layer (13) which, when a voltage is applied thereto, optically rotates and causes linearly polarized light in one direction to be linearly polarized light in the other direction, while, when no voltage is applied, does not alter the direction of the linearly polarized light; a polarizing selective reflector (16) which reflects the linearly polarized light in one direction while allows the linearly polarized light in the other direction to pass through; and a second polarizing plate (15) which absorbs the light in one direction while allows the light in the other direction to pass through. The polarizing selective reflector (16) is disposed only in the B direction of the liquid crystal layer (13).
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: July 14, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Kazuhiko Tsuda, Kozo Nakamura, Tokio Taguchi, Shun Ueki, Satoru Kishimoto
  • Publication number: 20090096970
    Abstract: The present invention provides a complex birefringent medium, which has the so-called inverse wavelength dispersibility, that is, a wavelength dispersibility capable of giving an optimum phase difference to a light of a wide visible wavelength range, has a wide viewing angle, can be produced by a convenient method and is excellent in a degree of adjusting freedom of inverse wavelength dispersibility and in mass productivity, a polarizing plate and a liquid crystal display device.
    Type: Application
    Filed: June 1, 2007
    Publication date: April 16, 2009
    Inventors: Akira Sakai, Takayuki Natsume, Masahiro Hasegawa, Kazuhiko Tsuda, Nobuaki Yamada
  • Publication number: 20090073358
    Abstract: Realizes a structure for a transreflective liquid crystal display device in which one pixel is defined by four or more picture elements, the structure providing a high aperture ratio and being suitable for display for which the transmission mode is prioritized. A liquid crystal display device according to the present invention is a transreflective liquid crystal display device, comprising a plurality of picture elements including a first picture element, a second picture element, a third picture element and a fourth picture element for displaying different colors from one another; in which each of the plurality of picture elements includes a transmission area for providing display in a transmission mode and a reflection area for providing display in a reflection mode. Each picture element includes a mesh portion shaped to be meshable with an adjacent picture element; and the reflection area of each picture element is located in the mesh portion.
    Type: Application
    Filed: February 19, 2007
    Publication date: March 19, 2009
    Inventors: Tokio Taguchi, Kazuhiko Tsuda, Mutsumi Nakajima, Keisuke Yoshida, Junichi Yamada
  • Patent number: 7440057
    Abstract: A display device includes: a display medium layer; and a first electrode and a second electrode, which face each other with the display medium layer interposed between them. The first electrode includes: a first conductive layer; and a first polymer film, which covers the first conductive layer and which makes contact with the display medium layer. The second electrode includes: a second conductive layer; and a second polymer film, which covers the second conductive layer and which makes contact with the display medium layer. At least a portion of the first conductive layer has a different work function from the second conductive layer. The number of benzene rings included in each of the first and second polymer films is 0.4 or less for a molecular weight of 100.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: October 21, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Kazuhiko Tsuda, Sayuri Fujiwara
  • Publication number: 20080055218
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 6, 2008
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta, Yutaka Kamezaki, Hitoshi Kamezaki, Masano Kamezaki
  • Patent number: 7321353
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: January 22, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
  • Patent number: 7292296
    Abstract: A double-sided display which can suitable carry out black display both in a well-lighted place and a dark place is provided. The following members are disposed in the B direction: a first polarizing plate (14) which allows only a linearly polarized light component to pass through; a liquid crystal layer (13) which, when a voltage is applied thereto, optically rotates and causes linearly polarized light in one direction to be linearly polarized light in the other direction, while, when no voltage is applied, does not alter the direction of the linearly polarized light; a polarizing selective reflector (16) which reflects the linearly polarized light in one direction while allows the linearly polarized light in the other direction to pass through; and a second polarizing plate (15) which absorbs the light in one direction while allows the light in the other direction to pass through. The polarizing selective reflector (16) is disposed only in the B direction of the liquid crystal layer (13).
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: November 6, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Kazuhiko Tsuda, Kozo Nakamura, Tokio Taguchi, Shun Ueki, Satoru Kishimoto
  • Patent number: 7286108
    Abstract: A liquid crystal panel (2) includes scanning signal lines (31) for supplying scanning signals to gate electrodes (20) of TFTs (14), and data signal lines (32) for supplying data signals to data electrodes (24) of TFTs. The liquid crystal panel further includes auxiliary capacitive electrode pads (27a) for use in forming auxiliary capacitance and an auxiliary capacitive lines (33) so as not to generate a capacitive bond with the scanning signal lines. The liquid crystal panel is driven at a rewriting frequency of a screen of not more than 30 Hz. As a result, the liquid crystal panel can be driven at a low consumption power while maintaining a desirable display quality of the liquid crystal panel.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: October 23, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masahiro Shimizu, Hisakazu Nakamura, Kouji Kumada, Takashige Ohta
  • Publication number: 20070236632
    Abstract: A double-sided display which can suitable carry out black display both in a well-lighted place and a dark place is provided. The following members are disposed in the B direction: a first polarizing plate (14) which allows only a linearly polarized light component to pass through; a liquid crystal layer (13) which, when a voltage is applied thereto, optically rotates and causes linearly polarized light in one direction to be linearly polarized light in the other direction, while, when no voltage is applied, does not alter the direction of the linearly polarized light; a polarizing selective reflector (16) which reflects the linearly polarized light in one direction while allows the linearly polarized light in the other direction to pass through; and a second polarizing plate (15) which absorbs the light in one direction while allows the light in the other direction to pass through. The polarizing selective reflector (16) is disposed only in the B direction of the liquid crystal layer (13).
    Type: Application
    Filed: June 1, 2007
    Publication date: October 11, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Kazuhiko Tsuda, Kozo Nakamura, Tokio Taguchi, Shun Ueki, Satoru Kishimoto
  • Publication number: 20070159698
    Abstract: An antireflective member according to the present invention has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following Inequality (1): ? ? ? ? x , y ? min < 1 ni + ni · sin ? ? ? ? ? ? ? i max ( 1 ) where ?min is the shortest wavelength of the incoming light ray, ?imax is the largest angle of incidence of the incoming light ray, ni is the refractive index of an incidence medium, ?x is the period of the uneven surface pattern in the x direction, and ?y is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.
    Type: Application
    Filed: February 6, 2007
    Publication date: July 12, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Tokio Taguchi, Shun Ueki, Kozo Nakamura, Kazuhiko Tsuda
  • Patent number: 7113339
    Abstract: The interferometric modulator of the invention includes a transparent substrate (refractive index: n0) 12, an optical thin film (complex index of refraction: N1=n1?i·k1) 13 provided on the transparent substrate 12, and an absorber layer (complex index of refraction: Ns=ns?i·ks) 14 opposed to the optical thin film 13, the distance of a gap to the optical thin film 13 being variable, wherein the relation n1>n0, k1?0 and ns>n0 is satisfied.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: September 26, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tokio Taguchi, Shun Ueki, Kazuhiko Tsuda
  • Patent number: 7106400
    Abstract: An object of the invention is to provide a method of manufacturing a liquid crystal display apparatus of high display quality by which a reflecting plate having excellent reflection characteristics can easily be manufactured with excellent reproducibility. A negative or positive photosensitive resin is applied to a substrate, asperities are formed in a first region of the applied photosensitive resin film by exposing the first region with various integrals of exposure amount so that the photosensitive resin in the first region is left in different film thicknesses and a concave is formed in a second region of the applied photosensitive resin film so that the photosensitive resin in the second region is left in a thickness smaller than those of the first region by exposing the second region with an integral of exposure amount different from those for the first region.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: September 12, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Kazuhiro Ishizuka, Hiroyuki Ohgami
  • Publication number: 20060187380
    Abstract: A liquid crystal display device includes, from its back surface side towards its front surface side: a polarization selective reflection plate (12) which reflects x-directional linearly polarized light and transmits y-directional linearly polarized light; a first polarizing plate (4) which transmits the x-directional linearly polarized light; a liquid crystal display panel (13); and a second polarizing plate (8) which transmits the y-directional linearly polarized light. The polarization selective reflection plate (12) is arranged only on a back surface side of the liquid crystal display panel (13). The y-directional linearly polarized light incident on the back surface side is reflected from the polarization selective reflection plate (12), there by protecting privacy. The x-directional linearly polarized light transmitted reaches the front surface side, via the first polarizing plate (4), the liquid crystal display panel (13), and the second polarizing plate (8).
    Type: Application
    Filed: July 21, 2004
    Publication date: August 24, 2006
    Inventors: Kazuhiko Tsuda, Shun Ueki
  • Patent number: 7084849
    Abstract: A liquid crystal display device includes: pixel electrodes arranged in columns and rows, each including a reflective electrode region; scanning lines; and signal lines. The device sequentially supplies a scanning signal voltage to one of the scanning lines after another to select one group of pixel electrodes, connected to the same one of the scanning lines, after another, and then supplies display signal voltages to the selected group of pixel electrodes by way of the signal lines, thereby displaying an image thereon. The pixel electrodes are arranged such that the polarity of a voltage to be applied to a liquid crystal layer is inverted for every predetermined number of pixel electrodes in each of the rows and in each of the columns. The display signal voltage to be supplied to each pixel electrode is updated at a frequency of 45 Hz or less.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: August 1, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Noboru Noguchi, Hisashi Nagata, Toshihiro Matsumoto, Kazuhiko Tsuda, Makoto Kanbe, Akihiko Kojima
  • Publication number: 20060125755
    Abstract: A liquid crystal display device includes: pixel electrodes arranged in columns and rows, each including a reflective electrode region; scanning lines; and signal lines. The device sequentially supplies a scanning signal voltage to one of the scanning lines after another to select one group of pixel electrodes, connected to the same one of the scanning lines, after another, and then supplies display signal voltages to the selected group of pixel electrodes by way of the signal lines, thereby displaying an image thereon. The pixel electrodes are arranged such that the polarity of a voltage to be applied to a liquid crystal layer is inverted for every predetermined number of pixel electrodes in each of the rows and in each of the columns. The display signal voltage to be supplied to each pixel electrode is updated at a frequency of 45 Hz or less.
    Type: Application
    Filed: February 15, 2006
    Publication date: June 15, 2006
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Noboru Noguchi, Hisashi Nagata, Toshihiro Matsumoto, Kazuhiko Tsuda, Makoto Kanbe, Akihiko Kojima
  • Patent number: 7016703
    Abstract: Disclosed is a portable information apparatus, which is provided with a display section capable of displaying a color display and a dynamic display in a high image quality, and which consumes less electricity. When the portable information apparatus of a folder type is in a folded state, a display screen 100 is composed of an image display region and a non-image region, so that at least a part of the image display region can be seen via a transparent section 102.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: March 21, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Satoru Kishimoto, Kazuhiko Tsuda, Katsuya Mizukata, Kenichi Katoh
  • Publication number: 20060007377
    Abstract: A display device includes: a display medium layer; and a first electrode and a second electrode, which face each other with the display medium layer interposed between them. The first electrode includes: a first conductive layer; and a first polymer film, which covers the first conductive layer and which makes contact with the display medium layer. The second electrode includes: a second conductive layer; and a second polymer film, which covers the second conductive layer and which makes contact with the display medium layer. At least a portion of the first conductive layer has a different work function from the second conductive layer. The number of benzene rings included in each of the first and second polymer films is 0.4 or less for a molecular weight of 100.
    Type: Application
    Filed: September 16, 2005
    Publication date: January 12, 2006
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Kazuhiko Tsuda, Sayuri Fujiwara