Patents by Inventor Ching-Shan Dai

Ching-Shan Dai 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).

  • Publication number: 20070046926
    Abstract: A fingerprint identification assembly includes a laminated lens having a first lens, a second lens and a third lens formed together with the first lens and the second lens, each of the first lens, the second lens and the third lens has a dielectric film coated thereon. At least one illuminator is located at a bottom of the laminated lens and a sensor located under the laminated lens for picking up an image of a fingerprint on top of the laminated lens. The dielectric film of the laminated lens allows light from the at least one illuminator to be partially reflected due to the fingerprint on the laminated lens and partially penetrates through the second lens and the third lens to be picked up by the sensor.
    Type: Application
    Filed: August 26, 2005
    Publication date: March 1, 2007
    Inventors: Jung-Chun Wu, Jyh-Long Chern, Ching-Shan Dai, Yung-Wen Lin, Jyh-Der Hwang
  • Publication number: 20070014441
    Abstract: A fingerprint identification assembly includes a body having an objective lens mounted on top of the body for receiving thereon a fingertip and a first reflective lens mounted on a bottom of the body to receive reflected light from the objective lens, a light source emitting light to the first reflective lens and a sensing device integrally formed with the body and having a second reflective lens to receive the reflected light from the first reflective lens and a sensor to receive the reflected light from the second reflective lens so as to compare the received reflected light with information stored inside the sensor.
    Type: Application
    Filed: July 13, 2005
    Publication date: January 18, 2007
    Inventors: Jung-Chun Wu, Jyh-Long Chern, Ching-Shan Dai, Yung-Wen Lin, Jyh-Der Hwang
  • Publication number: 20060250605
    Abstract: The present invention provides a kind of compact-thin contact image sensor, particularly a fingerprint optical input apparatus, which can extract fingerprint image with a strip-type sensor. And it can produce fingerprint image with high definition, and shorten its size with the multibend light pipe. In addition, it has an enough guiding length for forming a strip area distributed uniformly, and the light would project on the strip-type fingerprint pressed on a transparent panel from some angle and reflect to the strip-type sensors by total internal reflection. Lastly, the forest fingerprint image would be extracted by moving the finger.
    Type: Application
    Filed: May 4, 2005
    Publication date: November 9, 2006
    Inventors: Jyh-Long Chern, Ching-Shan Dai, Jung-Chun Wu, Jyh-Der Hwang