Patents by Inventor Jan H. Duistermaat

Jan H. Duistermaat 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).

  • CRT display device for use in high ambient light
    Patent number: 5760540
    Abstract: A CRT display device including an envelope having a faceplate of a predetermined light transmissivity, a luminescent screen disposed on an inner surface of the faceplate and electron beam producing means disposed within the envelope for exiting the screen to effect production of a luminescent image, a neutral density transmissivity filter means disposed adjacent an outer surface of the faceplate, wherein for viewing under high ambient light conditions the total transmissivity T.sub.t is 10%.ltoreq.T.sub.t .ltoreq.30%, and during operation of the display device the electron beam producing means produce a beam current density on the screen such that the contrast C.sub.4000 is 4.ltoreq.C.sub.4000 .ltoreq.8.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: June 2, 1998
    Assignee: U.S. Philips Corporation
    Inventor: Jan H. Duistermaat