Patents by Inventor Hiroshi Nagai

Hiroshi Nagai 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).

  • Patent number: 8194211
    Abstract: A LCD unit includes a reflective area and a transmissive area in each pixel, which are driven by respective drive electrode assemblies. A first substrate and a second substrate that sandwich therebetween a LC layer include respective shied films in the boundary area between the reflective area and the transmissive area.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: June 5, 2012
    Assignee: NLT Technologies, Ltd.
    Inventors: Hiroshi Nagai, Michiaki Sakamoto, Kenichirou Naka, Kenichi Mori
  • Patent number: 8139184
    Abstract: An LCD device includes a reflective area in each pixel. A reflection film having a convex-concave surface is provided in the reflective area, film in cross section configuration is formed. Each pixel includes a pixel electrode and a common electrode for applying a lateral electric field on a LC layer. The inclination angle of the reflection film has an inclination angle distribution, wherein the angle component in an area corresponding to the electrodes has a lower angle distribution than the angle components in an area corresponding to a gap between adjacent two of the electrodes.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: March 20, 2012
    Assignee: NLT Technologies Ltd.
    Inventors: Kenichirou Naka, Michiaki Sakamoto, Hiroshi Nagai, Kenichi Mori
  • Patent number: 8115458
    Abstract: A driver includes a sensor sensing a driving current and a driving voltage for an external device including a capacitor, a PWM, a PFC, and a controller. The PFC includes a phase angle estimation unit estimating a phase angle variation of an input voltage to the PFC based on a parameter regarding the driving current, a voltage compensator compensating an error of the driving voltage, a first current estimation unit estimating a variation of a charge of the capacitor based on the charge current and the phase angle variation estimated by the phase angle estimation unit, a second current estimation unit estimating a driving current variation, and a calculator calculating a duty ratio for the PWM based on the variation of the charge current estimated by the first current estimation unit and the driving current variation estimated by the second current estimation unit.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: February 14, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuki Kamata, Hiroshi Masumoto, Hiroshi Nagai, Sadao Ikeda
  • Patent number: 8064030
    Abstract: A liquid crystal display device includes an array of pixels each including a plurality of sub-pixels, a plurality of pixel electrodes disposed in the respective sub-pixels, and a plurality of common electrodes disposed in the respective sub-pixels. The common electrode disposed in each of the sub-pixels in one of the pixels on each row is connected to the common electrodes disposed in the corresponding sub-pixels in the others of the pixels on the each row, to form a group of common electrodes connected together.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: November 22, 2011
    Assignee: NED LCD Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Kenichi Mori, Kenichirou Naka, Hiroshi Nagai
  • Patent number: 8018538
    Abstract: To increase the aperture ratio of a transflective liquid crystal display device and suppress a light leakage. Provided is a transflective liquid crystal display device that includes: within a unit pixel, a reflective area including a pixel electrode and a common electrode as a pair and a reflector, and a transmissive area including a pixel electrode and a common electrode as a pair; a liquid crystal layer provided to the reflective area and the transmissive area; storage capacitances for the reflective area and the transmissive area provided in a lower layer of the reflector for changing a potential of the pixel electrode by following a potential of the common electrode; and a suppressing device for suppressing a light leakage in the liquid crystal layer when the pixel electrode is affected by a potential of the reflector due to capacitance coupling generated between the reflector and the pixel electrode.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: September 13, 2011
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Kenichi Mori, Michiaki Sakamoto, Hiroshi Nagai, Kenichirou Naka
  • Patent number: 8018556
    Abstract: A LCD device includes a LC cell including a homogeneously-oriented LC layer and a pair of transparent substrates. A pair of polarizing films sandwiching therebetween the LC cell. A protective layer of the light-emitting-side polarizing film has an optical isotropy, and protective layer of the light-incident-side polarizing film has an thickness-wise retardation of 20 to 90 nm. A biaxial optical anisotropic film is interposed between the light-emitting-side polarizing film and the LC cell, and a second optical anisotropic film for cancelling the wavelength dispersion caused by the biaxial optical anisotropic film is interposed between the light-incident-side polarizing film and the LC cell. The biaxial optical anisotropic film has three-dimensional refractive indexes ns, nf and nz that satisfy therebetween (ns?nz)/(ns?nf)?0.5%.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: September 13, 2011
    Assignee: NEC LCD Technologies, Ltd
    Inventor: Hiroshi Nagai
  • Patent number: 7982835
    Abstract: A transflective liquid crystal display device is provided with a liquid crystal layer sandwiched between a first substrate with an array of switching elements and a second substrate with a black matrix so as to form a first area for a normally black display and a second area for a normally white display A first electric potential difference formed between the black matrix and both of the first common electrode and the first pixel electrode formed in the first area on the first substrate is made to be smaller than a larger one of the second electric potential difference formed between the black matrix and both of the second common electrode and the second pixel electrode formed in the second area.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: July 19, 2011
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Kenichirou Naka, Hiroshi Nagai, Michiaki Sakamoto, Kenichi Mori, Kousuke Shibata
  • Patent number: 7952658
    Abstract: An in-plane-switching-mode (IPS) LCD device includes a TFT substrate and a CF substrate sandwiching therebetween an LC layer, and a pair of polarizing films sandwiching therebetween the substrates and the LC layer. Each polarizing film has a polarization layer and a protective layer. An optical compensation layer having a birefringence is disposed between the light-emitting-side polarizing film and to the CF substrate. The optical compensation layer has an in-plane retardation of N1 satisfying the following relationship: 83.050?0.810×D1?N1?228.090?0.74D1 in the range of 0<D1?80 ?m, wherein D1 is the thickness of the protective layer of the light-incident-side polarizing film.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: May 31, 2011
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroshi Nagai, Hidenori Ikeno
  • Publication number: 20110089912
    Abstract: A driver includes a sensor sensing a driving current and a driving voltage for an external device including a capacitor, a PWM, a PFC, and a controller. The PFC includes a phase angle estimation unit estimating a phase angle variation of an input voltage to the PFC based on a parameter regarding the driving current, a voltage compensator compensating an error of the driving voltage, a first current estimation unit estimating a variation of a charge of the capacitor based on the charge current and the phase angle variation estimated by the phase angle estimation unit, a second current estimation unit estimating a driving current variation, and a calculator calculating a duty ratio for the PWM based on the variation of the charge current estimated by the first current estimation unit and the driving current variation estimated by the second current estimation unit.
    Type: Application
    Filed: March 15, 2010
    Publication date: April 21, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuki Kamata, Hiroshi Masumoto, Hiroshi Nagai, Sadao Ikeda
  • Patent number: 7927025
    Abstract: An optical fiber branch cable is provided that comprises a branch portion disposed stably with respect to a multi-core optical fiber cable of a trunk line from which branching is performed, that is excellent in handleability as a cable, and that exhibits high workability. In the optical fiber branch cable of the invention, in a middle of a multi-core optical fiber cable 2 of a trunk line, a branch portion 11 is disposed. The branch portion 11 has: a base member 16 which is attached so as to cover a tensile-strength wire 9 in a portion where a cable jacket 10 of the multi-core optical fiber cable 2 is removed away; a multi-core optical connector 30 which is connected to the tip end of a tape unit 4 drawn out from the multi-core optical fiber cable 2; an extra-length housing portion 18 which houses an extra length of the tape unit 4 to which the multi-core optical connector 30 is connected; and a connector attaching portion 19 to which the multi-core optical connector 30 is attachable in a plural number.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: April 19, 2011
    Assignees: Sumitomo Electric Industries, Ltd., Toyokuni Electric Cable Co., Ltd.
    Inventors: Kenichiro Ohtsuka, Katsuyuki Aihara, Keisuke Okada, Masaji Yahagi, Hiroshi Nagai, Hideaki Tajima, Kimio Ito, Toshiyuki Igarashi
  • Patent number: 7924377
    Abstract: To provide a transflective liquid crystal display apparatus that employs in-plane switching mode (in-plane switching system), which exhibits a reflection property of wide view angles. Provided is a transflective liquid crystal display apparatus which comprises: a reflective area and a transmissive area; an uneven reflective plate provided in the reflective area; a flattening film laminated on the uneven reflective plate; and common electrodes and pixel electrodes arranged on the flattening film, wherein, the uneven reflective plate comprises a diffusive reflecting function that is capable of diffusely reflecting light making incident at an incident angle of 30 degrees towards directions at exit angles of 0-10 degrees, and a surface of the flattening film is set to be substantially flat.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: April 12, 2011
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Kenichi Mori, Michiaki Sakamoto, Daisuke Inoue, Kenichirou Naka, Hiroshi Nagai
  • Patent number: 7876406
    Abstract: A transflective LCD includes a LC layer sandwiched between a pair of substrates, and a pair of polarizing films. The LCD device includes a reflection area and a transmission area in each pixel, the transmission area having a reflection film. A retardation film has a first portion in the refection area between the reflection film and the LC layer, and a second portion in the transmission area between the LC layer and the rear polarizing film. The retardation film has a slow axis perpendicular to an initial orientation direction of the LC molecules upon absence of an applied voltage and perpendicular or parallel to the optical axis of the front polarizing film. The orientation of the LC molecules upon display of a dark state has a direction different between the reflection area and the transmission area.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: January 25, 2011
    Assignee: NEC LCD Technologies, Ltd
    Inventors: Hiroshi Nagai, Michiaki Sakamoto, Kenichirou Naka, Kenichi Mori
  • Publication number: 20110007247
    Abstract: An in-plane-switching-mode (IPS) LCD device includes a TFT substrate and a CF substrate sandwiching therebetween an LC layer, and a pair of polarizing films sandwiching therebetween the substrates and the LC layer. Each polarizing film has a polarization layer and a protective layer. An optical compensation layer having a birefringence is disposed between the light-emitting-side polarizing film and to the CF substrate. The optical compensation layer has an in-plane retardation of N1 satisfying the following relationship: 83.050?0.810×D1?N1?228.090?0.74D1 in the range of 0<D1?80 ?m, wherein D1 is the thickness of the protective layer of the light-incident-side polarizing film.
    Type: Application
    Filed: September 22, 2010
    Publication date: January 13, 2011
    Inventors: Hiroshi Nagai, Hidenori Ikeno
  • Patent number: 7864274
    Abstract: A LCD device has a LC layer sandwiched between a TFT substrate and a counter substrate, first and second polarizing films, a first ?/2 film between the first polarizing film and the counter substrate, and a second ?/2 film between the second polarizing film and the TFT substrate. Angle ?1 between the direction of the optical axis of the LC layer and the polarized direction of the light entering the LC layer satisfies the relationship: 0 degree<?1<45 degrees. The resultant LCD device has lower leakage light and coloring.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: January 4, 2011
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroshi Nagai, Michiaki Sakamoto, Kenichi Mori, Kenichirou Naka, Hidenori Ikeno
  • Publication number: 20100328592
    Abstract: A LCD device has a LC layer sandwiched between a TFT substrate and a counter substrate, first and second polarizing films, a first ?/2 film between the first polarizing film and the counter substrate, and a second ?/2 film between the second polarizing film and the TFT substrate. Angle ?1 between the direction of the optical axis of the LC layer and the polarized direction of the light entering the LC layer satisfies the relationship: 0 degree<?1<45 degrees. The resultant LCD device has lower leakage light and coloring.
    Type: Application
    Filed: August 31, 2010
    Publication date: December 30, 2010
    Inventors: Hiroshi Nagai, Michiaki Sakamoto, Kenichi Mori, Kenichirou Naka, Hidenori Ikeno
  • Publication number: 20100286390
    Abstract: Novel pyridazinone compounds of formula (I), which inhibit the purinergic P2X7 receptor and are useful for prevention, therapy and improvement of inflammatory and immunological diseases.
    Type: Application
    Filed: October 30, 2008
    Publication date: November 11, 2010
    Inventors: Yukihiro Shigeta, Yutaka Hirokawa, Hiroshi Nagai, Kei Nagae, Tsuneo Watanabe, Megumi Io, Yusuke Shintani, Junji Kamon, Masato Horikawa, Kazuya Takeuchi
  • Patent number: 7826016
    Abstract: An in-plane-switching-mode (IPS) LCD device includes a TFT substrate and a CF substrate sandwiching therebetween an LC layer, and a pair of polarizing films sandwiching therebetween the substrates and the LC layer. Each polarizing film has a polarization layer and a protective layer. An optical compensation layer having a birefringence is disposed between the light-emitting-side polarizing film and the CF substrate. The optical compensation layer has an in-plane retardation of N1 satisfying the following relationship: 83.050?0.8101×D1?N1?228.09?0.74D1 in the range of 0<D1?80 ?m, wherein D1 is the thickness of the protective layer of the light-incident-side polarizing film.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: November 2, 2010
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hiroshi Nagai, Hidenori Ikeno
  • Publication number: 20100173556
    Abstract: An LCD device includes a reflective area in each pixel. A reflection film having a convex-concave surface is provided in the reflective area, film in cross section configuration is formed. Each pixel includes a pixel electrode and a common electrode for applying a lateral electric field on a LC layer. The inclination angle of the reflection film has an inclination angle distribution, wherein the angle component in an area corresponding to the electrodes has a lower angle distribution than the angle components in an area corresponding to a gap between adjacent two of the electrodes.
    Type: Application
    Filed: March 16, 2010
    Publication date: July 8, 2010
    Applicant: NEC LCD Technologies, Ltd.
    Inventors: Kenichirou NAKA, Michiaki SAKAMOTO, Hiroshi NAGAI, Kenichi MORI
  • Publication number: 20100173231
    Abstract: An LCD device includes a reflective area in each pixel. A reflection film having a convex-concave surface is provided in the reflective area, film in cross section configuration is formed. Each pixel includes a pixel electrode and a common electrode for applying a lateral electric field on a LC layer. The inclination angle of the reflection film has an inclination angle distribution, wherein the angle component in an area corresponding to the electrodes has a lower angle distribution than the angle components in an area corresponding to a gap between adjacent two of the electrodes.
    Type: Application
    Filed: March 16, 2010
    Publication date: July 8, 2010
    Applicant: NEC LCD Technologies, Ltd.
    Inventors: Kenichirou Naka, Michiaki Sakamoto, Hiroshi Nagai, Kenichi Mori
  • Publication number: 20100171775
    Abstract: An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region juxtaposed. The reflective region operates in a normally-white mode, and the transmissive region operates in a normally-black mode. A common data signal is supplied to the reflective region and transmissive region, whereas the common electrode signal in the transmissive region is an inverted signal of the common electrode signal in the reflective region, to thereby obtain similar gray-scale levels.
    Type: Application
    Filed: March 16, 2010
    Publication date: July 8, 2010
    Inventors: Michiaki Sakamoto, Jin Matsushima, Hiroshi Nagai, Kenichi Mori, Hidenori Ikeno, Yasuki Kudo, Ken Sumiyoshi