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).
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Publication number: 20050036097Abstract: 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: ApplicationFiled: September 20, 2004Publication date: February 17, 2005Inventor: Rumo Satake
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Publication number: 20050030732Abstract: 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: ApplicationFiled: September 2, 2004Publication date: February 10, 2005Inventors: Hajime Kimura, Rumo Satake
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Publication number: 20050030258Abstract: 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: ApplicationFiled: September 13, 2004Publication date: February 10, 2005Inventor: Rumo Satake
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Publication number: 20050007536Abstract: 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: ApplicationFiled: May 3, 2004Publication date: January 13, 2005Inventors: Yoshiharu Hirakata, Takeshi Nishi, Rumo Satake
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Patent number: 6839108Abstract: 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: GrantFiled: May 13, 1999Date of Patent: January 4, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Rumo Satake, Hideaki Kuwabara, Takeshi Nishi
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Patent number: 6801267Abstract: 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: GrantFiled: November 9, 2001Date of Patent: October 5, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Rumo Satake
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Patent number: 6798132Abstract: 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: GrantFiled: April 19, 2002Date of Patent: September 28, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Rumo Satake
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Patent number: 6789910Abstract: 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: GrantFiled: April 11, 2001Date of Patent: September 14, 2004Assignee: Semiconductor Energy Laboratory, Co., Ltd.Inventors: Hajime Kimura, Rumo Satake
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Publication number: 20040174485Abstract: 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: ApplicationFiled: March 24, 2004Publication date: September 9, 2004Applicant: Semiconductor Energy Laboratory Co., Ltd., a Japan corporationInventors: Shunpei Yamazaki, Takeshi Nishi, Rumo Satake
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Publication number: 20040174490Abstract: 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: ApplicationFiled: March 15, 2004Publication date: September 9, 2004Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Rumo Satake, Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
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Publication number: 20040160540Abstract: 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: ApplicationFiled: February 9, 2004Publication date: August 19, 2004Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Yuriko Hamamoto, Rumo Satake
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Publication number: 20040125305Abstract: 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: ApplicationFiled: December 16, 2003Publication date: July 1, 2004Applicant: Semiconductor Energy Laboratory, Co., Ltd., a Japan CorporationInventors: Takeshi Nishi, Rumo Satake, Yoshiharu Hirakata
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Patent number: 6750931Abstract: 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: GrantFiled: September 30, 2002Date of Patent: June 15, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Rumo Satake, Takeshi Nishi, Yoshiharu Hirakata
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Patent number: 6734924Abstract: 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: GrantFiled: September 7, 2001Date of Patent: May 11, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Yuriko Hamamoto, Rumo Satake
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Patent number: 6707521Abstract: 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: GrantFiled: July 22, 2002Date of Patent: March 16, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Rumo Satake, Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
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Patent number: 6697129Abstract: 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: GrantFiled: March 29, 1999Date of Patent: February 24, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takeshi Nishi, Rumo Satake, Yoshiharu Hirakata
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Publication number: 20030112401Abstract: 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: ApplicationFiled: November 25, 2002Publication date: June 19, 2003Inventors: Shunpei Yamazaki, Takeshi Nishi, Rumo Satake
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Publication number: 20030058392Abstract: 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: ApplicationFiled: July 22, 2002Publication date: March 27, 2003Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Rumo Satake, Yoshiharu Hirakata, Takeshi Nishi, Shunpei Yamazaki
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Publication number: 20030020854Abstract: 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: ApplicationFiled: September 30, 2002Publication date: January 30, 2003Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Rumo Satake, Takeshi Nishi, Yoshiharu Hirakata
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Patent number: 6498634Abstract: 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: GrantFiled: January 25, 1999Date of Patent: December 24, 2002Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Takeshi Nishi, Rumo Satake