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:
Jun. 04, 2002
Filed:
Dec. 08, 1999
Shigeto Sakakibara, Osaka, JP;
Funai Electric Co., Ltd., Daito, JP;
Abstract
In effecting channel preset, a microcomputer first determines whether or not a broadcasting is on the air on the basis of the presence or absence of a horizontal synchronizing signal obtained through synchronizing separation by a video IC, and if it is thereby determined that the broadcasting is on the air, received broadcasting signal is pulled into a normal tuning point on the basis of an AFC voltage from the video IC, whereupon the corresponding channel is stored if a vertical synchronizing signal from the video IC can be detected at the normal tuning point. Therefore, it is possible to provide a channel preset device which is capable to detecting an on-air channel more reliably and storing the same without adding special circuitry and the like.