The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1985
Filed:
Sep. 06, 1983
James Smith, Reigate, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A display apparatus including a modular type display tube having a cathodoluminescent screen, elongate thermionic or P-N electron emitters, a channel plate electron multiplier and an apertured control plate between the emitters and the multiplier. The control plate has a plurality of switching electrodes on the side facing the emitter and a set of brightness electrodes on the opposite side and extending transversely to the switching electrodes. In order to compensate for variations in emission from the emitters, the brightness voltage to the brightness electrodes is turned-off and emission variations are measured by scanning using the switching electrodes. Correction voltages are computed and applied together with the modulation signal in synchronism with the scanning of the switching electrodes. An apertured shielding plate is provided to prevent the switching voltages at the switching electrodes from affecting the emissions from the emitters.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile