Patents by Inventor Takeshi Nishi

Takeshi Nishi 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: 20040125305
    Abstract: An electric field that is parallel with a TFT substrate is formed by a pair of electrodes formed on the TFT substrate. Liquid crystal molecules in a light modulating layer are caused to respond electro-optically to the electric field. The light modulating layer is constituted of a liquid crystal material, an optically active substance, and a dichroic dye. The spiral pitch p [&mgr;m] of the light modulating layer, the cell thickness d [&mgr;m], the twist angle n of liquid crystal molecules, and the interelectrode interval L [&mgr;m] are set in ranges of 1≦p≦15, 1≦d≦10, n≦300°, and L<25.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 1, 2004
    Applicant: Semiconductor Energy Laboratory, Co., Ltd., a Japan Corporation
    Inventors: Takeshi Nishi, Rumo Satake, Yoshiharu Hirakata
  • Patent number: 6750931
    Abstract: A liquid crystal display device is realized which is improved in light reflectivity on pixel electrodes to provide brightness at low cost and low power consumption. A dielectric multi-layered film having a first dielectric film (low refractive film) 105 and a second dielectric film (high refractive film) 106 is formed on a pixel electrode 104 connected to a TFT 102 formed on a substrate 101 having an insulation surface. This dielectric multi-layered film is determined in refractive index (n), center wavelength (&lgr;) and film thickens (d) according to an equation nd=&lgr;/4, to give an enhanced reflection effect.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: June 15, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Rumo Satake, Takeshi Nishi, Yoshiharu Hirakata
  • Patent number: 6743650
    Abstract: In an active matrix semiconductor display device in which pixel TFTs and driver circuit TFT are formed on the same substrate in an integral manner, the cell gap is controlled by gap retaining members that are disposed between a pixel area and driver circuit areas. This makes it possible to provide a uniform cell thickness profile over the entire semiconductor display device. Further, since conventional grainy spacers are not used, stress is not imposed on the driver circuit TFTs when a TFT substrate and an opposed substrate are bonded together. This prevents the driver circuit TFTs from being damaged.
    Type: Grant
    Filed: September 9, 2002
    Date of Patent: June 1, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
  • Patent number: 6707521
    Abstract: To provide a novel and extremely effective structure of a liquid crystal display device in which the lowering of reflectivity due to the formation of orientation films can be prevented, a method of manufacturing the display device of the present invention comprises forming a concave or convex portion on a reflection electrode, forming a dielectric multi-layer film thereon, to thereby obtain the liquid crystal display device excellent in reflection characteristics and diffused reflection characteristics.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: March 16, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Rumo Satake, Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
  • Publication number: 20040036822
    Abstract: A liquid crystal electro-optical device comprising a pair of substrates at least one of them is light-transmitting, electrodes being provided on said substrates, and an electro-optical modulating layer being supported by said pair of substrates, provided that said electro-optical modulating layer comprises an anti-ferroelectric liquid crystal material or a smectic liquid crystal material which exhibits anti-ferroelectricity, and a transparent material.
    Type: Application
    Filed: August 22, 2003
    Publication date: February 26, 2004
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Takeshi Nishi, Toshimitsu Konuma, Michio Shimizu, Kouji Moriya
  • Patent number: 6697129
    Abstract: A liquid crystal display device comprising a light modulating layer being interposed between a first substrate and a second substrate, a common electrode being formed over the first substrate in parallel with a drain electrode, wherein an electric field is formed between the drain electrode and the common electrode in a parallel direction to the first substrate, wherein said light modulating layer comprising a liquid crystal material, an optically active substance and a dichroic dye is operated in a guest-host mode, wherein said liquid crystal material has a spiral pitch p in a range of 1<p<15 &mgr;m, and wherein a cell thickness d is in a range of 1<d<10 &mgr;m.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: February 24, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeshi Nishi, Rumo Satake, Yoshiharu Hirakata
  • Patent number: 6678023
    Abstract: A liquid crystal projector in which light is effectively used and an excellent picture can be obtained is provided. In the liquid crystal projector, dichroic mirrors arranged at different angles are used to separate white light into beams of light of three primary colors of R, G, and B, and the respective beams of light are incident on microlenses at different angles. The respective beams of light of the three primary colors are distributed by the microlenses to optical components corresponding to pixels, and highly collimated light beams can be obtained by the optical components. Since the highly collimated light beams are made incident on the pixels of the liquid crystal panel, the beams can be certainly made incident on desired pixels.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: January 13, 2004
    Assignees: Semiconductor Energy Laboratory Co., Ltd., Sharp Kabushiki Kaisha
    Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Takeshi Nishi, Shunichi Naka, Shuhei Tuchimoto, Hiroshi Hamada, Yoshihiro Mizuguchi
  • Publication number: 20040003939
    Abstract: An EL display device capable of reducing an average film resistance of an anode in an EL device as well as displaying an image with high definition, and electrical equipment including such an EL display device are provided. A light-shielding metal film 109 is provided on an anode 108 so as to conceal gaps between the pixels. Thus, an average film resistance of the anode 108 in the EL device is reduced. Furthermore, light leakage from the gaps between the pixels can be prevented, resulting in an image display with high definition.
    Type: Application
    Filed: June 23, 2003
    Publication date: January 8, 2004
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeshi Nishi, Noriko Ishimaru
  • Publication number: 20040004434
    Abstract: A light emitting device having a structure in which oxygen and moisture are prevented from reaching light emitting elements, and a method of manufacturing the same, are provided. Further, the light emitting elements are sealed by using a small number of process steps, without enclosing a drying agent. The present invention has a top surface emission structure. A substrate on which the light emitting elements are formed is bonded to a transparent sealing substrate. The structure is one in which a transparent second sealing material covers the entire surface of a pixel region when bonding the two substrates, and a first sealing material (having a higher viscosity than the second sealing material), which contains a gap material (filler, fine particles, or the like) for protecting a gap between the two substrates, surrounds the pixel region. The two substrates are sealed by the first sealing material and the second sealing material.
    Type: Application
    Filed: June 20, 2003
    Publication date: January 8, 2004
    Inventors: Takeshi Nishi, Yasuo Nakamura
  • Publication number: 20030218173
    Abstract: A light emitting element, in which voltages having different polarities are applied alternately in order to prevent the accumulation of electric charge in an organic compound layer of the light emitting element, and in which light is always emitted, no matter whether a positive polarity voltage or a negative polarity voltage is applied, is provided. An opposing electrode is formed between a first electrode and a second electrode, and a first light emitting element having a compound layer that contains a first organic substance between the first electrode and the opposing electrode, and a second light emitting element having a compound layer that contains a second organic substance between the opposing electrode and the second electrode, are formed in the present invention.
    Type: Application
    Filed: April 4, 2003
    Publication date: November 27, 2003
    Inventors: Takeshi Nishi, Noriko Shibata
  • Patent number: 6628263
    Abstract: An information input/output apparatus comprising a display device, a screen on which an image displayed on the display device is projected with magnification, and a position detecting means for detecting a position of an arbitrarily designated particular point on the screen.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: September 30, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Toshimitsu Konuma, Takeshi Nishi, Shunpei Yamazaki
  • Patent number: 6618105
    Abstract: A liquid crystal electro-optical device comprising a pair of substrates at least one of them is light-transmitting, electrodes being provided on said substrates, and an electro-optical modulating layer being supported by said pair of substrates, provided that said electro-optical modulating layer comprises an anti-ferroelectric liquid crystal material or a smectic liquid crystal material which exhibits anti-ferroelectricity, and a transparent material.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: September 9, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Takeshi Nishi, Toshimitsu Konuma, Michio Shimizu, Kouji Moriya
  • Patent number: 6593691
    Abstract: An EL display device capable of reducing an average film resistance of an anode in an EL device as well as displaying an image with high definition, and electrical equipment including such an EL display device are provided. A light-shielding metal film (109) is provided on an anode (108) so as to conceal gaps between the pixels. Thus, an average film resistance of the anode (108) in the EL device is reduced. Furthermore, light leakage from the gaps between the pixels can be prevented, resulting in an image display with high definition.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: July 15, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeshi Nishi, Noriko Ishimaru
  • Patent number: 6587169
    Abstract: In an active matrix type liquid crystal display device, a plurality of pixels connected to thin film transistors (TFTs) are arranged in an active matrix form in a pixel portion, and driven by a driver circuit portion. The pixel portion and the driver circuit portion are formed on one of a pair of insulating substrates. A liquid crystal material is interposed between the insulating substrates. An black matrix material made of an organic resin is formed over the one insulating substrate in which the driver circuit portion has been formed. An flat film is formed on the black matrix material.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: July 1, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Takeshi Nishi
  • Publication number: 20030111666
    Abstract: By doping an organic compound functioning as an electron donor (hereinafter referred to as donor molecules) into an organic compound layer contacting a cathode, donor levels can be formed between respective LUMO (lowest unoccupied molecular orbital) levels between the cathode and the organic compound layer, and therefore electrons can be injected from the cathode, and transmission of the injected electrons can be performed with good efficiency. Further, there are no problems such as excessive energy loss, deterioration of the organic compound layer itself, and the like accompanying electron movement, and therefore an increase in the electron injecting characteristics and a decrease in the driver voltage can both be achieved without depending on the work function of the cathode material.
    Type: Application
    Filed: November 26, 2002
    Publication date: June 19, 2003
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeshi Nishi, Satoshi Seo
  • Publication number: 20030112401
    Abstract: In a horizontal electric field drive type liquid crystal electro-optic device wherein a liquid crystal material is driven by controlling the strength of an electric field parallel to a substrate, noncontinuity of the electric field strength around each pixel electrode is minimized and thereby the occurrence of flaws in the orientation of the liquid crystal material and dispersion in operation are reduced and a construction having improved display characteristics and a method of manufacturing the same are provided. In a horizontal electric field drive type liquid crystal electro-optic device wherein a gate electrode 403, a source electrode 407, a drain electrode 408, a semiconductor film 406 and a common electrode 404 are formed on a glass substrate and a liquid crystal material is driven by controlling the strength of an electric field substantially parallel to the glass substrate, the electrodes and the semiconductor film are made curved, for example semi-circular or semi-elliptical, in sectional profile.
    Type: Application
    Filed: November 25, 2002
    Publication date: June 19, 2003
    Inventors: Shunpei Yamazaki, Takeshi Nishi, Rumo Satake
  • Patent number: 6580405
    Abstract: An information processing device and its system is provided in which a display unit (head mount display) is used and a user carries out an information processing operation while seeing a virtual display screen. Polycrystalline silicon using CGS is used for a semiconductor of a display element of a liquid crystal panel used in the head mount display, so that high speed driving is made possible. The display unit in which frame inversion made in a writing period (60 to 180 Hz) is connected to a control unit and an input operating unit, so that the user can carry out the information processing operation.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: June 17, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Takeshi Nishi, Hideaki Kuwabara
  • Publication number: 20030058392
    Abstract: To provide a novel and extremely effective structure of a liquid crystal display device in which the lowering of reflectivity due to the formation of orientation films can be prevented, a method of manufacturing the display device of the present invention comprises forming a concave or convex portion on a reflection electrode, forming a dielectric multi-layer film thereon, to thereby obtain the liquid crystal display device excellent in reflection characteristics and diffused reflection characteristics.
    Type: Application
    Filed: July 22, 2002
    Publication date: March 27, 2003
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Rumo Satake, Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
  • Patent number: 6525795
    Abstract: A liquid crystal display device is characterized by comprising first and second substrates on a surface of which electrodes are formed, a liquid crystal material with ferroelectricity or antiferroelectricity interposed between the first and second electrodes, and an orientation film and disposed between the electrode or electrodes formed on the surface of said first and/or second substrate whose surface has been subjected to a process which gives optically uniaxial orientation to the liquid crystal material, wherein said orientation film has a pretilt angle of 1.6 to 3.1 degree with respect to a nematic liquid crystal. Further, a value of a polar term of surface tension on the surface of the orientation film ranges from 11 to 15 dyne/cm.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: February 25, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Takeshi Nishi, Toshimitsu Konuma
  • Publication number: 20030020854
    Abstract: A liquid crystal display device is realized which is improved in light reflectivity on pixel electrodes to provide brightness at low cost and low power consumption. A dielectric multi-layered film having a first dielectric film (low refractive film) 105 and a second dielectric film (high refractive film) 106 is formed on a pixel electrode 104 connected to a TFT 102 formed on a substrate 101 having an insulation surface. This dielectric multi-layered film is determined in refractive index (n), center wavelength (&lgr;) and film thickens (d) according to an equation nd=&lgr;/4, to give an enhanced reflection effect.
    Type: Application
    Filed: September 30, 2002
    Publication date: January 30, 2003
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Rumo Satake, Takeshi Nishi, Yoshiharu Hirakata