Patents by Inventor Yeong Chuan Lim

Yeong Chuan Lim 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).

  • System and method for calibrating the light source for an optical navigational system
    Patent number: 7473885
    Abstract: Advantage is taken of the fact that in optical navigation devices it is possible to measure the intensity of light impacting the pixel array of photo-diodes. Based upon such an intensity determination, a feedback signal is used to reduce the intensity of the light to a point where it is equal to or less than a predetermined value. In one embodiment, the discharge rate of a capacitive power supply is used to determine the intensity of the light source impacting the pixels. When the discharge rate is faster than a given amount the inference is that the light intensity is too great and power is reduced to the light source to reduce the intensity.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: January 6, 2009
    Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventor: Yeong Chuan Lim