Patents by Inventor Chi-Ping Tsai

Chi-Ping Tsai 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).

  • Focus adjusting system of an optical scanner
    Patent number: 6157468
    Abstract: A focus adjusting system of an optical scanner which comprises an optical scanning module having a focus for scanning line images of a document line by line and converting each of the line images into a digital image signal set, and a scanning driver for driving the scanning module back and forth so as to scan the document. The focus adjusting system comprises a focus driver for adjusting the focus of the scanning module, and a focus controller for controlling the focus driver according to the digital image signal sets generated by the scanning module at various foci over a line position of the document so as to adjust the focus of the scanning module.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: December 5, 2000
    Assignee: Microtek International Inc.
    Inventors: Chi-Ping Tsai, Chien-Pang Huang