Patents by Inventor Bernhard Lau

Bernhard Lau 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).

  • Electron gun system
    Patent number: 4891549
    Abstract: The electron gun system of a color picture tube has coined depressions in the area of the apertures for the electron beams in at least one grid electrode, the coined depressions in one side of the grid electrode being concave. Preferably, this is the side of the grid electrode facing the cathode.
    Type: Grant
    Filed: May 20, 1987
    Date of Patent: January 2, 1990
    Assignee: Nokia Graetz
    Inventors: Karl Kniesser, Walter Kornaker, Bernhard Lau, Werner Schanz
  • In-line gun system for a color picture tube
    Patent number: 4843278
    Abstract: In a color picture tube with an in-line gun system elliptic beam-spot distortion caused by the deflection field is compensated for by pairs of plates in at least one focus electrode. The plates project into the apertures for the electron beams and are located at a distance from the bottom of the focus electrode.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: June 27, 1989
    Assignee: Nokia Graetz GmbH
    Inventor: Bernhard Lau
  • Apparatus for measuring the position of a light source disposed inside a lighthouse
    Patent number: 4630909
    Abstract: Measuring apparatus for measuring the position of a light source inside a lighthouse as used in the manufacture of phosphor screens of color picture tubes comprises a base plate and two optical projection devices which are directed on to the light source, and which each contain at least two position diodes. An evaluating circuit connected thereto ascertains the position of the light source and the result is fed to a display device.
    Type: Grant
    Filed: February 14, 1985
    Date of Patent: December 23, 1986
    Assignee: Standard Elektrik Lorenz AG
    Inventors: Dieter Forker, Joachim Hassler, Bernhard Lau, Rolf Schmidt