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. 19, 1983
Filed:
Mar. 06, 1981
James Smith, Reigate, GB;
Daphne L Lamport, Caterham, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A flat cathode ray tube comprises in an envelope (10) an electron gun (16) for generating a low energy electron beam (14) which undergoes electrostatic frame deflection by means of a pair of electrodes (22, 24). The electron beam (14) then has its energy increased by means of a double electron lens (30). The double electron lens (30) comprises a first electron lens (32) the image of which forms the object for a second electron lens (36) which provides an electron spot of acceptable size on the screen (12). Thereafter the beam undergoes line deflection in an electrostatic line deflector (40). The line deflector (40) varies the angle of entry of the electron beam into a uniform electric field formed between the screen (12) and a repeller electrode (44) where electron beam follows a parabolic trajectory to the screen (12).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile