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. 07, 1988
Filed:
Aug. 20, 1986
Kunio Hakamada, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
Apparatus for use in a television receiver of the kind controlled by a micro-computer is intended for the situation in which power failures occur and specifically where instantaneous power failures occur and shortly thereafter the power is recovered, in which it is determined whether or not the time display data stored in a memory of the micro-computer is correct and, if so, such data is continued to be refreshed and is used for the time display, whereby a backup circuit is simplified in construction, and even eliminated in some cases. The main television receiver control data are stored in a nonvolatile memory when a power interruption occurs, but are only used to refresh the random access memory of the micro-computer in those instances where the power outage exists for a period of time long enough to erase the time display data retained in the random access memory, a condition that is determined by checking such time display data each time it is necessary to reset the central processing unit of the micro-computer in view of a drop in line voltage.