Patents by Inventor Rumo Satake

Rumo Satake 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: 20050036097
    Abstract: The leakage of light and the disclination occur at the ends of the pixel electrodes where the equipotential lines bend toward the pixel electrodes. A dielectric 207 having a high dielectric constant is provided at the ends of the pixel electrodes to lift up the equipotential lines toward the opposing electrode, in order to decrease the leakage of light and the disclination.
    Type: Application
    Filed: September 20, 2004
    Publication date: February 17, 2005
    Inventor: Rumo Satake
  • Publication number: 20050030732
    Abstract: A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate.
    Type: Application
    Filed: September 2, 2004
    Publication date: February 10, 2005
    Inventors: Hajime Kimura, Rumo Satake
  • Publication number: 20050030258
    Abstract: A display device using an organic light emitting element is provided which is structured so as to ensure excellent display performance by avoiding dot defect and improve long-term reliability. The distance between an organic light emitting element and a sealing substrate is controlled using the top of a bank that is placed in a pixel portion and the top of an insulating film that is placed in a driving circuit portion. As a result, a gap is provided between the organic light emitting element and the sealing substrate and a damage to the organic light emitting element can be avoided. Furthermore, the sealing substrate can be as close to an element substrate as possible, thereby keeping the amount of moisture that enters the display device from its sides small.
    Type: Application
    Filed: September 13, 2004
    Publication date: February 10, 2005
    Inventor: Rumo Satake
  • Publication number: 20050007536
    Abstract: A brighter active matrix type liquid crystal electro-optical device with a higher contrast, yet having a wider visual angle is realized, said liquid crystal electro-optical device comprises a liquid crystal layer and means for applying an electric field to the liquid crystal layer in the direction parallel to the substrate, wherein the liquid crystal layer comprises a liquid crystal material dispersed in a polymer material. Also a liquid crystal electro-optical device comprising a liquid crystal layer disposed on a substrate is included, wherein the transmission mode or the dispersion mode of an incident light is selected by an electric field applied to the liquid crystal layer in the direction parallel to the liquid crystal layer.
    Type: Application
    Filed: May 3, 2004
    Publication date: January 13, 2005
    Inventors: Yoshiharu Hirakata, Takeshi Nishi, Rumo Satake
  • Patent number: 6839108
    Abstract: To provide a novel liquid crystal display device comprising a light reflection layer where light is likely to more effectively reflect, and a method of manufacturing the same. The present invention can realize high resolution and high opening rate by using a dielectric multi-layer film as the light reflection layer to form thereon a pixel electrode consisting of a transparent conductive films.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: January 4, 2005
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiharu Hirakata, Rumo Satake, Hideaki Kuwabara, Takeshi Nishi
  • Patent number: 6801267
    Abstract: The leakage of light and the disclination occur at the ends of the pixel electrodes where the equipotential lines bend toward the pixel electrodes. A dielectric 207 having a high dielectric constant is provided at the ends of the pixel electrodes to lift up the equipotential lines toward the opposing electrode, in order to decrease the leakage of light and the disclination.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: October 5, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Rumo Satake
  • Patent number: 6798132
    Abstract: A display device using an organic light emitting element is provided which is structured so as to ensure excellent display performance by avoiding dot defect and improve long-term reliability. The distance between an organic light emitting element and a sealing substrate is controlled using the top of a bank that is placed in a pixel portion and the top of an insulating film that is placed in a driving circuit portion. As a result, a gap is provided between the organic light emitting element and the sealing substrate and a damage to the organic light emitting element can be avoided. Furthermore, the sealing substrate can be as close to an element substrate as possible, thereby keeping the amount of moisture that enters the display device from its sides small.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: September 28, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Rumo Satake
  • Patent number: 6789910
    Abstract: A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: September 14, 2004
    Assignee: Semiconductor Energy Laboratory, Co., Ltd.
    Inventors: Hajime Kimura, Rumo Satake
  • Publication number: 20040174485
    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: March 24, 2004
    Publication date: September 9, 2004
    Applicant: Semiconductor Energy Laboratory Co., Ltd., a Japan corporation
    Inventors: Shunpei Yamazaki, Takeshi Nishi, Rumo Satake
  • Publication number: 20040174490
    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: March 15, 2004
    Publication date: September 9, 2004
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Rumo Satake, Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
  • Publication number: 20040160540
    Abstract: Disclination of an active matrix liquid crystal display device is reduced. Portions of pixel electrodes are formed so as to mutually overlap with a convex portion. If the height of the convex portion is too tall, the amount of light leakage increases due to liquid crystals orienting diagonally with respect to a substrate surface. (See FIG. 1C.) If the height of the convex portion is low, the disclination reduction effect is low. The optimal convex portion height is thus determined.
    Type: Application
    Filed: February 9, 2004
    Publication date: August 19, 2004
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiharu Hirakata, Yuriko Hamamoto, Rumo Satake
  • 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: 6734924
    Abstract: Disclination of an active matrix liquid crystal display device is reduced. Portions of pixel electrodes are formed so as to mutually overlap with a convex portion. If the height of the convex portion is too tall, the amount of light leakage increases due to liquid crystals orienting diagonally with respect to a substrate surface. (See FIG. 1C.) If the height of the convex portion is low, the disclination reduction effect is low. The optimal convex portion height is thus determined.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: May 11, 2004
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiharu Hirakata, Yuriko Hamamoto, Rumo Satake
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 6498634
    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: Grant
    Filed: January 25, 1999
    Date of Patent: December 24, 2002
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Takeshi Nishi, Rumo Satake