Patents by Inventor Chien-Liang Yeh

Chien-Liang Yeh 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: 6421158
    Abstract: An image scanning device with a rotatable reflection mirror arranged in an optical scanning module thereof for establishing either a reflective or transparent scanning optical path is disclosed. The optical scanning module includes a first focusing lens, a second focusing lens, an image sensing module, a plurality of fixed reflective optical path mirrors, a plurality of fixed transparent optical path mirrors, and a rotatable reflection mirror. At scanning a reflective document, the rotatable reflection mirror is rotated to a first reflection position. A light beam from a first light source projects to the reflective document. The image of the reflective document is reflected by the rotatable reflection mirror and the fixed reflective optical path mirrors, and then received by the image sensing module through the first focusing lens. At scanning a transparent document, the rotatable reflection mirror is rotated to a second reflection position.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: July 16, 2002
    Assignee: UMAX Data Systems, Inc.
    Inventor: Chien-Liang Yeh
  • Publication number: 20020085260
    Abstract: An image scanning device with a switching mechanism arranged in an optical scanning module thereof for selectively scanning a reflective or transparent original document is disclosed. The optical scanning module includes a reflective optical path composed of a plurality of first group reflection mirrors and a first focusing lens and a transparent optical path composed a plurality of second group reflection mirrors and a second focusing lens. The second focusing lens of the transparent optical path is arranged at an angle with respect to the first focusing lens of the reflective optical path. An image sensing module is arranged adjacent to the light projecting outlets of the first and second focusing lens for selectively picking up the focused light beam from the first or second focusing lens.
    Type: Application
    Filed: December 28, 2000
    Publication date: July 4, 2002
    Inventors: Yin-Chun Huang, Chien-Liang Yeh
  • Publication number: 20020080460
    Abstract: An image scanning device with a rotatable reflection mirror arranged in an optical scanning module thereof for establishing either a reflective or transparent scanning optical path is disclosed. The optical scanning module includes a first focusing lens, a second focusing lens, an image sensing module, a plurality of fixed reflective optical path mirrors, a plurality of fixed transparent optical path mirrors, and a rotatable reflection mirror. At scanning a reflective document, the rotatable reflection mirror is rotated to a first reflection position. A light beam from a first light source projects to the reflective document. The image of the reflective document is reflected by the rotatable reflection mirror and the fixed reflective optical path mirrors, and then received by the image sensing module through the first focusing lens. At scanning a transparent document, the rotatable reflection mirror is rotated to a second reflection position.
    Type: Application
    Filed: December 27, 2000
    Publication date: June 27, 2002
    Inventor: Chien-Liang Yeh