Patents by Inventor Tetsuya Utsumi, deceased

Tetsuya Utsumi, deceased 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).

  • Light-emitting apparatus and method for forming the same
    Patent number: 7122958
    Abstract: In a bottom emission type light-emitting apparatus, a face of a substrate, which is opposite from a light-emitting device, is an uneven surface having a plurality of asperities. The mean spacing Sm of adjacent asperities or the mean spacing S of peaks of adjacent projections of the asperities is no less than three times the longest wavelength of light generated by the light-emitting layer and no more than two hundred times the longest wavelength. The arithmetic mean slope ?a of the uneven surface is in a range between 3° and 20°, inclusive. Therefore, the apparatus substantially has higher extraction efficiency and a higher brightness in a specific direction.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: October 17, 2006
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Tetsuya Utsumi, deceased, Tomoko Utsumi, legal representative, Masaaki Arima, Masayuki Harada, Mari Funada
  • Light-emitting apparatus and method for forming the same
    Patent number: 7071617
    Abstract: In a light-emitting apparatus, a face of a substrate on which a light-emitting device is formed is an uneven surface having a plurality of asperities. The mean spacing Sm of adjacent asperities or the mean spacing S of peaks of adjacent projections of the asperities is no less than three times the longest wavelength of light generated by a light-emitting layer and no more than two hundred times the longest wavelength. The arithmetic mean slope ?a of the uneven surface is in a range between 4° and 30°, inclusive. Therefore, the apparatus emits substantially a greater amount of light from a light extraction side and has less brightness unevenness than a light-emitting apparatus with no uneven surface.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: July 4, 2006
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Tetsuya Utsumi, deceased, Tomoko Utsumi, legal representative, Masaaki Arima, Masayuki Harada, Mari Funada
  • Light-emitting apparatus and method for forming the same
    Patent number: 7067974
    Abstract: In a bottom emission type light-emitting apparatus, a face of a substrate, which is opposite from a light-emitting device, is an uneven surface having a plurality of asperities. The mean spacing Sm of adjacent asperities or the mean spacing S of peaks of adjacent projections of the asperities is no less than three times the longest wavelength of light generated by the light-emitting layer and no more than two hundred times the longest wavelength. The arithmetic mean slope ?a of the uneven surface is in a range between 3° and 20°, inclusive. Therefore, the apparatus substantially has higher extraction efficiency and a higher brightness in a specific direction.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: June 27, 2006
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Tomoko Utsumi, legal representative, Masaaki Arima, Masayuki Harada, Mari Funada, Tetsuya Utsumi, deceased