Patents by Inventor Tsung Y. Hsu

Tsung Y. Hsu 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).

  • Patent number: 4989956
    Abstract: A light emitting panel is formed of a transparent plastic substrate doped with fluorescent dye which absorbs incident light through a relatively large surface area and emits light of a longer wavelength out through one edge. The incident light may be ambient or produced by a fluorescent light source. The edge emitted light is optically coupled into an edge of a display panel, which may be a polymer dispersed liquid crystal display or a plastic panel having a display surface formed with an etched or printed pattern, grating or hologram. The substrate materials of the emitting and display panels, as well as an optical adhesive which joins the edges thereof, preferably have an essentially similar index of refraction which is larger than that of air causing light propagating through the panels to be internally reflected and exit the structure only through the pattern on the display surface.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: February 5, 1991
    Assignee: Hughes Aircraft Company
    Inventors: Wei-Yu Wu, Tsung Y. Hsu, Anna M. Lackner, Willis H. Smith, Jr.