Patents by Inventor Ran-Hong Chang

Ran-Hong Chang 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).

  • PROJECTOR
    Publication number: 20100002153
    Abstract: A projector includes a display screen, an imaging system adapted to provide an optical image, a reflector arranged on a transmission path of the optical image, and an optical transmission medium disposed inside the refraction space. The refraction space is formed between the reflector and the display screen. The optical image travels through the optical transmission medium by the reflection of the reflector and is transmitted to the display screen. A refractive index of the optical transmission medium is not equal to one.
    Type: Application
    Filed: September 15, 2009
    Publication date: January 7, 2010
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Jyh-Long Chern, Ran-Hong Chang, Yi -Kai Cheng, Ming-Der Chou
  • Projector
    Patent number: 7611250
    Abstract: A projector including a display screen and an imaging system is provided. The imaging system is adapted for providing an optical image and the optical image is transmitted to the display screen through an optical transmission medium. The refractive index of the optical transmission medium is not equal to one. The transmission path of the optical image is changed by controlling the refraction index of the optical transmission medium in order to thin the projector.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: November 3, 2009
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Jyh-Long Chern, Ran-Hong Chang, Yi-Kai Cheng, Ming-Der Chou
  • PROJECTOR
    Publication number: 20070097339
    Abstract: A projector including a display screen and an imaging system is provided. The imaging system is adapted for providing an optical image and the optical image is transmitted to the display screen through an optical transmission medium. The refractive index of the optical transmission medium is not equal to one. The transmission path of the optical image is changed by controlling the refraction index of the optical transmission medium in order to thin the projector.
    Type: Application
    Filed: October 27, 2005
    Publication date: May 3, 2007
    Inventors: Jyh-Long Chern, Ran-Hong Chang, Yi-Kai Cheng, Ming-Der Chou