Patents by Inventor Ralf Dornhaus

Ralf Dornhaus 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: 4974942
    Abstract: An active flat-design video screen is described, having signal line means arranged in lines and columns, these signal line means, at their crossing points, defining picture elements of the video screen, in which case the lines that are arranged in columns are developed as electrodes and the signal line means that are arranged in lines are developed by means of optical waveguides into which, on the input side, a modulated light signal is coupled and which, at each crossing point, have a device for the coupling-out of the respective light signal. In comparison to conventional active flat-design video screens, the video screen according to the invention distinguishes itself particularly by a good picture resolution and a good contrast range, connected with a good regeneration rate.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: December 4, 1990
    Assignees: Battelle Memorial Institute, Battelle Institute e.V.
    Inventors: Daniel Gross, Gert Hewig, Ralf Dornhaus, Alan L. Harmer