Patents by Inventor Ralph Hampton Bradley

Ralph Hampton Bradley 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).

  • Mutli-color-band light source
    Patent number: 5892623
    Abstract: A light source for projecting rectangular color light bands includes a white-light source, a color separation device for separating the white light into red, green and blue components, and separate optics for forming images of rectangular red, green and blue light bands at predetermined positions. The light source is particularly useful in projection television apparatus having single panel light valves.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: April 6, 1999
    Assignee: Philips Electronics North America
    Inventor: Ralph Hampton Bradley
  • Multi-color-band scrolling across single-panel light valve
    Patent number: 5845981
    Abstract: A scanning-light-band display apparatus includes a light-valve panel and an optical system. The optical system includes a multicolor light source and a faceted, rotatable light-transmissive polygonal prism. The light source projects illumination rays for forming images of red, green and blue light bands through the prism along different respective paths. A combination of optical components is arranged for intercepting the illumination rays and forming the images on the panel.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: December 8, 1998
    Assignee: Philips Electronics North America Corporation
    Inventor: Ralph Hampton Bradley