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. 27, 1996
Filed:
Jan. 19, 1995
Akiyoshi Inoue, Saitama-ken, JP;
Shoji Taniguchi, Saitama-ken, JP;
Eisaku Kawano, Saitama-ken, JP;
Naoharu Yanagawa, Saitama-ken, JP;
Hiroshi Suzuki, Saitama-ken, JP;
Pioneer Electronic Corporation, Tokyo-to, JP;
Abstract
A laser power calibration device installed in a recording device for recording information on an optical recording medium includes: laser unit for emitting and irradiating a laser beam on the optical recording medium to record FM video signal and EFM audio signal; unit for varying recording power of the laser beam and duty of recording signal for driving the laser unit independently of each other; unit for reading the FM video signal and EFM audio signal recorded on the optical recording medium; unit for detecting carrier level of the recorded FM video signal and error rate of recorded EFM audio signal; and unit for determining optimum recording power of the laser beam so that the carrier level is higher than a first predetermined value and the error rate is smaller than a second predetermined value.