Patents by Inventor Masaaki Yen

Masaaki Yen 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: 8629620
    Abstract: Provided is an automatic lighting control device for automatically switching on and off a lamp installed within a building in accordance with only the variation of brightness at the installation location. The automatic lighting control device is constituted as follows. A photoelectric transducer 1 has a daylight detection field that overlaps at least partially a lamp illumination field. A first comparator 2 generates a turn-on signal when the output level of the photoelectric transducer 1 becomes lower than the predetermined light-up level. A memory 5 stores the output level of the photoelectric transducer 1 after light-up. A second comparator 8 compares the output level of the photoelectric transducer 1 with the output level stored in the memory 5 after light-up and it generates a turn-off signal when the output level of the photoelectric transducer 1 becomes higher than the stored post-light-up brightness level.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: January 14, 2014
    Inventors: Masaaki Yen, Manabu Yen
  • Publication number: 20120098440
    Abstract: Provided is an automatic lighting control device for automatically switching on and off a lamp installed within a building in accordance with only the variation of brightness at the installation location. The automatic lighting control device is constituted as follows. A photoelectric transducer 1 has a daylight detection field that overlaps at least partially a lamp illumination field. A first comparator 2 generates a turn-on signal when the output level of the photoelectric transducer 1 becomes lower than the predetermined light-up level. A memory 5 stores the output level of the photoelectric transducer 1 after light-up. A second comparator 8 compares the output level of the photoelectric transducer 1 with the output level stored in the memory 5 after light-up and it generates a turn-off signal when the output level of the photoelectric transducer 1 becomes higher than the stored post-light-up brightness level.
    Type: Application
    Filed: June 18, 2010
    Publication date: April 26, 2012
    Inventors: Masaaki Yen, Manabu Yen