Patents by Inventor Yik Soo

Yik Soo 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).

  • Optical encoder with sinusoidal photodetector output signal
    Publication number: 20070120049
    Abstract: An optical encoder includes an optical encoder pattern of alternating light elements and dark elements, and an optical unit, including an optical emitter providing light to the encoder pattern, and an optical sensor including a photo-detector receiving the light from the optical encoder pattern and in response thereto outputting a sinusoidal signal indicating relative movement between the optical sensor and the encoder pattern. In one embodiment, the photo-detector has a diamond shape, a modified-diamond shape, or an hourglass shape. In another embodiment, at least one of the light elements and the dark elements of the optical encoder pattern has a diamond shape, a modified-diamond shape, or an hourglass shape.
    Type: Application
    Filed: November 28, 2005
    Publication date: May 31, 2007
    Inventors: Weng Wong, Chee Lum, Siang Foo, Song Ooi, Keen Leong, Yik Soo, Sai Hung, Gin Tan