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:
Nov. 27, 1979
Filed:
Mar. 17, 1978
Applicant:
Inventor:
Paul Sonnenberger, Hamburg, DE;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315384 ;
Abstract
To obtain a protection signal, an additional blanking signal is generated during field blanking, this signal being cancelled before the end of the blanking period of the circuit functions in a normal manner. Consequently, checking the proper operation takes place instantaneously in every period and without an external capacitor. If field retrace pulses are absent the electron beam in the picture tube is permamently cut off.