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:
Jul. 12, 1988
Filed:
Apr. 14, 1986
Derek Washington, Wallington, GB;
Daphne L Lamport, Godstone, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
In a flat cathode ray display tube of the type comprising an envelope having parallel front and rear walls and containing implosion-preventing support walls dividing the envelope into a plurality of modules, each module including a thermionic wire electron emitter, a switching electrode arrangement having a plurality of apertures to define one of a plurality of electron beam paths directed towards a cathodoluminescent screen carried on the front wall, and a channel electron multiplier intermediate the switching electrode arrangement and the screen for beam current multiplication, and electrodes carried by the support walls for line scanning and electron acceleration, the switching electrode arrangement comprises a stack of mutually insulated electrodes associated with each aperture and selectively operable to allow or prevent electrons to pass therethrough thereby to effect frame scanning.