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:
Aug. 14, 1990
Filed:
Apr. 06, 1987
Paulus J Hovens, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A coincidence circuit in a line synchronizing circuit arrangement for a picture display device. The coincidence circuit detects a coincidence state of an incoming line synchronizing signal which originates from a synchronizing signal separator, and a locally generated line signal which originates from a line oscillator. The coincidence circuit comprises a first coincidence detector which is operative during the field blanking interval and which comprises a source activated by the incoming line synchronizing signal for modifying the quantity of information which is stored in storage means. The line synchronizing signal is effectively inhibited in the coincidence state of the coincidence detector and is uninhibited in the non-coincidence state by the locally generated line signal. A second coincidence detector is operative during the field trace time and comprises a third source activated by the incoming line synchronizing signal for modifying the quantity of information which is stored in the storage means. The third source is enabled by the locally generated line signal in the coincidence state of the second coincidence detector, but is not enabled in the non-coincidence state.