Patents by Inventor Yukio Yamauchi

Yukio Yamauchi 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: 7466293
    Abstract: An EL display device capable of performing clear multi-gradation color display and electronic equipment provided with the EL display device are provided, wherein gradation display is performed according to a time-division driving method in which the luminescence and non-luminescence of an EL element (109) disposed in a pixel (104) are controlled by time, and the influence by the characteristic variability of a current controlling TFT (108) is prevented. When this method is used, a data signal side driving circuit (102) and a gate signal side driving circuit (103) are formed with TFTs that use a silicon film having a peculiar crystal structure and exhibit an extremely high operation speed.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: December 16, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yukio Yamauchi, Takeshi Fukunaga
  • Publication number: 20080305569
    Abstract: A reduction in contaminating impurities in a TFT, and a TFT which is reliable, is obtained in a semiconductor device which uses the TFT. By removing contaminating impurities residing in a film interface of the TFT using a solution containing fluorine, a reliable TFT can be obtained.
    Type: Application
    Filed: July 16, 2008
    Publication date: December 11, 2008
    Inventors: Masaya Kadono, Shunpei Yamazaki, Yukio Yamauchi, Hidehito Kitakado
  • Patent number: 7452738
    Abstract: A method of manufacturing an organic electroluminescent device, which, on a substrate, has a plurality of first electrodes, a light-emitting functional layer disposed to correspond to formation positions of the first electrodes, and a second electrode covering the light-emitting functional layer, includes forming a buffering layer that covers the second electrode, and forming a gas barrier layer that covers the buffering layer. The forming of the buffering layer includes coating a coating material having a monomer/oligomer material and a curing agent under a vacuum atmosphere, without a solvent, and thermally curing the coating material so as to form the buffering layer.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: November 18, 2008
    Assignee: Seiko Epson Corporation
    Inventors: Kenji Hayashi, Ryoichi Nozawa, Yukio Yamauchi
  • Patent number: 7402467
    Abstract: A reduction in contaminating impurities in a TFT, and a TFT which is reliable, is obtained in a semiconductor device which uses the TFT. By removing contaminating impurities residing in a film interface of the TFT using a solution containing fluorine, a reliable TFT can be obtained.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: July 22, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masaya Kadono, Shunpei Yamazaki, Yukio Yamauchi, Hidehito Kitakado
  • Publication number: 20080116458
    Abstract: An EL display device capable of performing clear multi-gradation color display and electronic equipment provided with the EL display device are provided, wherein gradation display is performed according to a time-division driving method in which the luminescence and non-luminescence of an EL element (109) disposed in a pixel (104) are controlled by time, and the influence by the characteristic variability of a current controlling TFT (108) is prevented. When this method is used, a data signal side driving circuit (102) and a gate signal side driving circuit (103) are formed with TFTs that use a silicon film having a peculiar crystal structure and exhibit an extremely high operation speed.
    Type: Application
    Filed: October 18, 2007
    Publication date: May 22, 2008
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yukio YAMAUCHI, Takeshi FUKUNAGA
  • Publication number: 20080018566
    Abstract: An EL display having high operating performance and reliability is provided. LDD regions 15a through 15d of a switching TFT 201 formed in a pixel are formed such that they do not overlap gate electrodes 19a and 19b to provide a structure which is primarily intended for the reduction of an off-current. An LDD region 22 of a current control TFT 202 is formed such that it partially overlaps a gate electrode 35 to provide a structure which is primarily intended for the prevention of hot carrier injection and the reduction of an off-current. Appropriate TFT structures are thus provided depending on required functions to improve operational performance and reliability.
    Type: Application
    Filed: September 24, 2007
    Publication date: January 24, 2008
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Yukio YAMAUCHI, Takeshi FUKUNAGA
  • Patent number: 7312572
    Abstract: An EL display device capable of performing clear multi-gradation color display and electronic equipment provided with the EL display device are provided, wherein gradation display is performed according to a time-division driving method in which the luminescence and non-luminescence of an EL element (109) disposed in a pixel (104) are controlled by time, and the influence by the characteristic variability of a current controlling TFT (108) is prevented. When this method is used, a data signal side driving circuit (102) and a gate signal side driving circuit (103) are formed with TFTs that use a silicon film having a peculiar crystal structure and exhibit an extremely high operation speed.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: December 25, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yukio Yamauchi, Takeshi Fukunaga
  • Patent number: 7274349
    Abstract: An EL display having high operating performance and reliability is provided. LDD regions 15a through 15d of a switching TFT 201 formed in a pixel are formed such that they do not overlap gate electrodes 19a and 19b to provide a structure which is primarily intended for the reduction of an off-current. An LDD region 22 of a current control TFT 202 is formed such that it partially overlaps a gate electrode 35 to provide a structure which is primarily intended for the prevention of hot carrier injection and the reduction of an off-current. Appropriate TFT structures are thus provided depending on required functions to improve operational performance and reliability.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: September 25, 2007
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yukio Yamauchi, Takeshi Fukunaga
  • Patent number: 7240216
    Abstract: Information stored in an IC card which can be set to a block state, where any functions permitted to a user authority holder is not effective and an unblock password is required to set the IC card back to an initial state, is more secured than that stored in an IC card without the block state. The IC card of the present invention is further provided with a counter counting the number of incorrect unblock passwords, and is set to a more secured state of operation where only administrative authority holder can release the IC card.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: July 3, 2007
    Assignee: NTT DoCoMo, Inc.
    Inventors: Hidetoshi Ishikawa, Yukio Yamauchi, Kanehiro Imai, Akihiro Higashi
  • Publication number: 20070132381
    Abstract: An emissive device includes a substrate; a plurality of first electrodes; pixel banks having a plurality of openings each corresponding to the position of a corresponding one of the first electrodes; organic function layers disposed in at least the openings; a second electrode disposed so as to cover the pixel banks and the organic function layers; a first inorganic layer disposed over the second electrode; a second inorganic layer disposed over the first inorganic layer; an organic buffer layer disposed over the second inorganic layer; and a gas barrier layer disposed over the organic buffer layer.
    Type: Application
    Filed: November 7, 2006
    Publication date: June 14, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kenji Hayashi, Yukio Yamauchi
  • Publication number: 20070114521
    Abstract: A light-emitting device includes: a plurality of light-emitting elements each of which has an anode, a thin organic light-emitting layer, and a cathode sequentially stacked on a substrate and emits light by excitation due to an electric field, the anode being separated from another anode by an insulating pixel partition wall; an organic buffer layer that is formed of an organic compound, covers an area larger than a region where the plurality of light-emitting elements are formed, has a step difference smaller than that of an upper surface of the cathode on the substrate, and is approximately flat; and first and second gas barrier layers that are formed of an inorganic compound, are disposed on an outer surface of the organic buffer layer, and protect the plurality of light-emitting elements against air.
    Type: Application
    Filed: September 13, 2006
    Publication date: May 24, 2007
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kenji HAYASHI, Yukio YAMAUCHI
  • Patent number: 7112462
    Abstract: The present invention relates to a semiconductor device formed in a self-light-emitting apparatus having a substrate and a plurality of self-light-emitting elements formed on the substrate, the semiconductor device being used to drive one of the self-light-emitting elements. The semiconductor device includes an active layer of semiconductor material, in which a source region and a drain region are formed, a source electrode having a multi-layered structure including an upper side layer of titanium nitride and a lower side layer of a high melting point metal having low resistance, the source electrode electrically being coupled to the source region, a drain electrode having a multi-layered structure including an upper side layer of titan nitride and a lower side layer of a high melting point metal having low resistance, the source electrode electrically being coupled to said drain region, an insulation layer formed on the active layer, and a gate electrode formed on the insulation layer.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: September 26, 2006
    Assignees: TDK Corporation, Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Michio Arai, Yukio Yamauchi
  • Publication number: 20060088951
    Abstract: A method of manufacturing an organic electroluminescent device, which, on a substrate, has a plurality of first electrodes, a light-emitting functional layer disposed to correspond to formation positions of the first electrodes, and a second electrode covering the light-emitting functional layer, includes forming a buffering layer that covers the second electrode, and forming a gas barrier layer that covers the buffering layer. The forming of the buffering layer includes coating a coating material having a monomer/oligomer material and a curing agent under a vacuum atmosphere, without a solvent, and thermally curing the coating material so as to form the buffering layer.
    Type: Application
    Filed: October 5, 2005
    Publication date: April 27, 2006
    Applicant: Seiko Epson Corporation
    Inventors: Kenji Hayashi, Ryoichi Nozawa, Yukio Yamauchi
  • Publication number: 20060087222
    Abstract: An organic EL display device has a substrate, a plurality of organic EL elements formed on the substrate and a plurality of thin film transistors formed on the substrate. The transistors are connected to the respective EL elements for controlling current applied to the respective elements.
    Type: Application
    Filed: December 8, 2005
    Publication date: April 27, 2006
    Applicants: Semiconductor Energy Laboratory Co., Ltd., TDK Corporation
    Inventors: Yukio Yamauchi, Michio Arai
  • Patent number: 7011444
    Abstract: A fire sensor comprising a baseplate, a temperature detecting element, and a protective case. The baseplate has an outside surface which serves as a heat sensing surface which is exposed to a hot airflow generated by a fire. The temperature detecting element thermally contacts with the inside surface of the baseplate to detect the temperature of the baseplate. The protective case contacts with the radially outer portion of the inside surface of the baseplate to form a hermetically sealed space between itself and the baseplate. The temperature detecting element is confined within the hermetically sealed space. The baseplate has the temperature detecting element in approximately the central portion of the inside surface thereof and also has a shape and a material which meet the condition that the product of the thickness and heat conductivity of the baseplate is 1.1×10?4 (W/K) or less.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: March 14, 2006
    Assignee: Hochiki Corporation
    Inventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima
  • Patent number: 6992435
    Abstract: An organic EL display device has a substrate, a plurality of organic EL elements formed on the substrate and a plurality of thin film transistors formed on the substrate. The transistors are connected to the respective EL elements for controlling current applied to the respective elements.
    Type: Grant
    Filed: January 25, 2005
    Date of Patent: January 31, 2006
    Assignees: Semiconductor Energy Laboratory Co., Ltd., TDK Corporation
    Inventors: Yukio Yamauchi, Michio Arai
  • Publication number: 20050184936
    Abstract: An EL display having high operating performance and reliability is provided. LDD regions 15a through 15d of a switching TFT 201 formed in a pixel are formed such that they do not overlap gate electrodes 19a and 19b to provide a structure which is primarily intended for the reduction of an off-current. An LDD region 22 of a current control TFT 202 is formed such that it partially overlaps a gate electrode 35 to provide a structure which is primarily intended for the prevention of hot carrier injection and the reduction of an off-current. Appropriate TFT structures are thus provided depending on required functions to improve operational performance and reliability.
    Type: Application
    Filed: March 22, 2005
    Publication date: August 25, 2005
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yukio Yamauchi, Takeshi Fukunaga
  • Patent number: 6917296
    Abstract: A fire heat sensor comprising a high-temperature detecting portion provided with a temperature detecting element which exhibits a fast heat response to a rise in ambient temperature, and a low-temperature detecting portion provided with a temperature detecting element which exhibits a slow heat response to a rise in ambient temperature. The fire heat sensor further comprises a resin member by which the high-temperature detecting portion and the low-temperature detecting portion are integrally formed so that heat energy is transferred from the temperature detecting element of the high-temperature detecting portion to the temperature detecting element of the low-temperature detecting portion. In the fire heat sensor, differential heat sensing is performed based on temperatures detected by the low-temperature detecting portion and the high-temperature detecting portion.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: July 12, 2005
    Assignee: Hochiki Corporation
    Inventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima
  • Publication number: 20050146262
    Abstract: An organic EL display device has a substrate, a plurality of organic EL elements formed on the substrate and a plurality of thin film transistors formed on the substrate. The transistors are connected to the respective EL elements for controlling current applied to the respective elements.
    Type: Application
    Filed: January 25, 2005
    Publication date: July 7, 2005
    Applicants: Semiconductor Energy Laboratory Co., Ltd., TDK Corporation
    Inventors: Yukio Yamauchi, Michio Arai
  • Patent number: 6877895
    Abstract: A fire sensor comprising a heat detection element for detecting heat from a hot airflow generated by a fire, a sensor main body, and an outer cover, which has a plurality of plate fins protruding from the sensor main body, for protecting the heat detecting element. The plate fins have a predetermined offset angle to a center line passing through the center of the outer cover and are erected approximately perpendicular to the sensor main body.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: April 12, 2005
    Assignee: Hochiki Corporation
    Inventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima