Patents by Inventor Si-Min Chen

Si-Min Chen 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).

  • Flat-plate scanner having a beam-splitting prism/mirror and two light emitting sources
    Patent number: 5780829
    Abstract: The present invention relates generally to a flat-plate scanner with two lamps, and particularly to a device adopts a beam-splitting device which partially reflects and partially transmits incident light. Reflective scanning utilizes a light source, a set of mirrors, a beam-splitting device and an image-capturing element, wherein reflected light (or transmitted light) from the beam-splitting device representing the reflective document image will be captured by the image-capturing element. On the other hand, transparent scanning utilizes another light source, another set of mirrors, the beam-splitting device and the image-capturing element, wherein transmitted light (or reflected light) from the beam-splitting device representing the transparent document image will be captured by the image-capturing element. The present invention is characterized in that all the optical members are fixed, and thus better accuracy and image quality can be acquired.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: July 14, 1998
    Assignee: Mustek Systems Inc.
    Inventors: Jenn-Tsair Tsai, Si-Min Chen