Patents by Inventor Seho SEO

Seho SEO 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).

  • Photosensor and sensor system
    Patent number: 10416346
    Abstract: A photosensor includes a light projection unit, a light receiving unit, a determination unit that determines a magnitude relation between a received light quantity of the light receiving unit and a threshold value set for the received light quantity; and a threshold value setting unit that sets the threshold value of the received light quantity. The threshold value setting unit calculates for each of a plurality of different wavelength regions, a contrast difference that is a difference between a received light quantity obtained when projection is performed on a detection target on a surface of a workpiece and a received light quantity obtained when projection is performed on a background on the surface of the workpiece, and updates the threshold value based on the contrast difference for a wavelength region among the plurality of wavelength regions in which the contrast difference has a maximum value.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: September 17, 2019
    Assignee: OMRON Corporation
    Inventors: Hironobu Morita, Motoharu Okuno, Yasuhito Uetsuji, Kazunari Komai, Takuya Matsushima, Yusuke Iida, Seho Seo
  • PHOTOSENSOR AND SENSOR SYSTEM
    Publication number: 20180267203
    Abstract: A photosensor includes a light projection unit, a light receiving unit, a determination unit that determines a magnitude relation between a received light quantity of the light receiving unit and a threshold value set for the received light quantity; and a threshold value setting unit that sets the threshold value of the received light quantity. The threshold value setting unit calculates for each of a plurality of different wavelength regions, a contrast difference that is a difference between a received light quantity obtained when projection is performed on a detection target on a surface of a workpiece and a received light quantity obtained when projection is performed on a background on the surface of the workpiece, and updates the threshold value based on the contrast difference for a wavelength region among the plurality of wavelength regions in which the contrast difference has a maximum value.
    Type: Application
    Filed: December 15, 2017
    Publication date: September 20, 2018
    Applicant: OMRON Corporation
    Inventors: Hironobu MORITA, Motoharu OKUNO, Yasuhito UETSUJI, Kazunari KOMAI, Takuya MATSUSHIMA, Yusuke IIDA, Seho SEO