Patents by Inventor Yoshifumi Nagai

Yoshifumi 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: 11940736
    Abstract: A tin trap device for collecting tin in a chamber device which causes tin to be turned into plasma with laser light in an internal space thereof may include a housing provided with a gas inlet port through which exhaust gas in the chamber device flows and a gas exhaust port through which the exhaust gas is exhausted; and a main heater arranged in the housing, configured to have a temperature equal to or higher than the melting point of tin and lower than the boiling point thereof, and having a projection surface projected toward a direction in which the exhaust gas flows in the gas inlet port cover the gas inlet port.
    Type: Grant
    Filed: August 10, 2021
    Date of Patent: March 26, 2024
    Assignee: Gigaphoton Inc.
    Inventors: Gota Niimi, Yoshifumi Ueno, Shinji Nagai
  • Patent number: 7425459
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has a light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer including a light scattering material is provided at least over the first layer, and the surface of the second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: September 16, 2008
    Assignee: Nichia Corporation
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Publication number: 20060234409
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has a light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer including a light scattering material is provided at least over the first layer, and the surface of the second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Application
    Filed: June 21, 2006
    Publication date: October 19, 2006
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Patent number: 7087445
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has a light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer includng a light scattering material is provided at least over the first layer, andthe surface of the second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: August 8, 2006
    Assignee: Nichia Corporation
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Patent number: 7015902
    Abstract: Each horizontal driving section and a driving control section of a display apparatus have a data communicating function. The driving control section has a first communicating section receiving data from an external device and a second communicating section communicating data with each horizontal driving section. The second communicating section adds individual identification information for identifying each horizontal driving section to the transferred data, and transfers the data in packet format. The horizontal driving section receives the data packet for it based on the identification information, and performs current driving for a display section. The driving control section adds the individual identification information to the control data to be transferred to each horizontal driving section corresponding to connecting form of the horizontal driving sections, and transfers the control data not concerned with connecting order of the horizontal driving sections.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: March 21, 2006
    Assignee: Nichia Corporation
    Inventors: Yoshifumi Nagai, Ryuhei Tsuji
  • Patent number: 6839056
    Abstract: A driving circuit in a display apparatus includes a current driving unit for supplying a driving current in a forward direction to a light emitting element based on control data. The current driving unit is furnished with a function of supplying a predetermined current in a reverse direction to the light emitting element. The driving circuit further includes a voltage comparing unit for judging whether a reverse voltage necessary to supply the predetermined current in the reverse direction is smaller than a predetermined voltage. The driving circuit notifies an abnormal condition of the light emitting element based on a judgment by the voltage comparing unit. Consequently, it is possible to detect a light emitting element generating a leak current in a reverse direction of the light emitting element even when the light emitting element is connected to the driving circuit.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: January 4, 2005
    Assignee: Nichia Corporation
    Inventors: Yoshifumi Nagai, Ryuhei Tsuji
  • Publication number: 20040241894
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has a light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer includng a light scattering material is provided at least over the first layer, andthe surface of the second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Application
    Filed: July 1, 2004
    Publication date: December 2, 2004
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Patent number: 6800996
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has (a) light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer including a light scattering material is provided at least over the first layer, and the surface of second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: October 5, 2004
    Assignee: Nichia Corporation
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Publication number: 20040046222
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has (a) light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer including a light scattering material is provided at least over the first layer, and the surface of second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Application
    Filed: August 14, 2003
    Publication date: March 11, 2004
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Publication number: 20040046720
    Abstract: An image display exhibiting high reproducibility by correcting variation in the chromaticity of light emitting elements and thereby uniforming the color tone of pixels, and a control method thereof. The image display comprises a display section where light emitting elements of a plurality of color tones are arranged for each pixel, a drive section for supplying the light emitting elements of each pixel with a drive current according to image data concerning the color tones, and a chromaticity correcting section for distributing a specified part of drive current, supplied from the drive section to a light emitting element corresponding to at least one of the color tones of each pixel, to a light emitting element corresponding to one or more other color tone of the pixel.
    Type: Application
    Filed: August 25, 2003
    Publication date: March 11, 2004
    Inventors: Yoshifumi Nagai, Hiroshi Tsujimoto, Yoshiyuki Nakano, Ryuhei Tsuji
  • Patent number: 6657382
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has (a) light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer including a light scattering material Is provided at least over the first layer, and the surface of second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices In an array on a substrate.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: December 2, 2003
    Assignee: Nichia Corporation
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno
  • Publication number: 20030016198
    Abstract: An image display exhibiting high reproducibility by correcting variation in the chromaticity of light emitting elements and thereby uniforming the color tone of pixels, and a control method thereof. The image display comprises a display section (10) where light emitting elements of a plurality of color tones are arranged for each pixel, a drive section (50) for supplying the light emitting elements of each pixel with a drive current according to image data concerning the color tones, and a chromaticity correcting section (11) for distributing a specified part of drive current, supplied from the drive section (50) to a light emitting element corresponding to at least one of the color tones of each pixel, to a light emitting element corresponding to one or more other color tone of the pixel.
    Type: Application
    Filed: August 2, 2002
    Publication date: January 23, 2003
    Inventors: Yoshifumi Nagai, Hiroshi Tsujimoto
  • Publication number: 20020180719
    Abstract: Each horizontal driving section (3) and a driving control section (4) of a display apparatus have a data communicating function. The driving control section has a first communicating section (5) receiving data from external and a second communicating section (6) communicating data with each horizontal driving section (3). The second communicating section (6) adds individual identification information (23) for identifying each horizontal driving section (3) to the transferred data, and transfers the data in packet format. The horizontal driving section (3) receives the data packet for it based on the identification information (23), and performs current driving for a display section (1).
    Type: Application
    Filed: July 22, 2002
    Publication date: December 5, 2002
    Inventors: Yoshifumi Nagai, Ryuhei Tsuji
  • Publication number: 20020163514
    Abstract: A driving circuit in a display apparatus includes a current driving unit for supplying a driving current in a forward direction to a light emitting element based on control data. The current driving unit is furnished with a function of supplying a predetermined current in a reverse direction to the light emitting element. The driving circuit further includes a voltage comparing unit for judging whether a reverse voltage necessary to supply the predetermined current in the reverse direction is smaller than a predetermined voltage. The driving circuit notifies an abnormal condition of the light emitting element based on a judgment by the voltage comparing unit. Consequently, it is possible to detect a light emitting element generating a leak current in a reverse direction of the light emitting element even when the light emitting element is connected to the driving circuit.
    Type: Application
    Filed: June 17, 2002
    Publication date: November 7, 2002
    Inventors: Yoshifumi Nagai, Ryuhei Tsuji
  • Publication number: 20020039001
    Abstract: A light emitting device and display apparatus using a plurality of light emitting devices can drastically reduce contrast loss due to light from an external source. The light emitting device has (a) light emitting chip(s) and a first layer covering the light emitting chip(s). A second layer including a light scattering material is provided at least over the first layer, and the surface of second layer has a plurality of protrusions which follow the topology of the light scattering material. The display apparatus is formed by disposing these light emitting devices in an array on a substrate.
    Type: Application
    Filed: July 19, 2001
    Publication date: April 4, 2002
    Inventors: Yoshifumi Nagai, Yuichi Fujiwara, Kunihiro Izuno