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:
Mar. 01, 1994
Filed:
May. 27, 1992
Hiroshi Murayama, Kanagawa, JP;
Akira Shirahama, Kanagawa, JP;
Takahiko Tamura, Tokyo, JP;
Yumiko Mito, Tokyo, JP;
Shinichirou Miyazaki, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A vertical synchronization processing circuit includes a counter for counting a clock signal synchronized with a horizontal sync. signal, a circuit for resetting the counter in response to a vertical synchronization signal within a predetermined limit prohibiting reset due to a non-standard signal, a memory for storing the data counted at the timing of reset, and a circuit for changing a predetermined limit prohibiting reset due to a non-standard signal according to the data from the memory. A circuit for discriminating an existence of a vertical synchronization interval can also be provided along with a second resetting circuit for resetting the counter if the discriminating circuit detects the existence of the vertical synchronization interval when the counter counts a predetermined number of clock signals in case there is not a vertical synchronization pulse within the predetermined limit.