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:
Dec. 20, 1988
Filed:
Feb. 18, 1987
Applicant:
Inventor:
Martin W Redfern, Maidstone, GB;
Assignee:
GEC Avionics Limited, , GB;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315386 ; 315401 ; 358220 ;
Abstract
A cathode ray tube (CRT) display arrangement including protection means for protecting the screen of the CRT (1) against excessive heating, by the electron beam, e.g. due to failure of the beam deflection drive circuits (5), the protection means comprising an electronic storage means (27 to 41) having storage locations in which are stored values indicative of the temperature at different locations on the CRT screen, and means (7) for controlling the electron beam current in dependence on the contents of the storage means.