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:
Jul. 01, 2003
Filed:
Aug. 24, 2001
Pioneer Electronic Corporation, Tokto-To, JP;
Abstract
A dye record disc has a disc shape substrate having a track-forming surface divided into a read-only area and a recordable area. A reproducing track is formed on the track-forming surface in the read-only area, and has a plurality of pits, each of the pits comprising a dye material, and having a shape corresponding to the reproducing information. A recording/reproducing track is formed on the track-forming surface in the recordable area, and extends continuously, the recording/reproducing track comprising the same dye material as each of the pits. The information reproducing apparatus includes an initial light emitting device for emitting an initial light beam to all of the pits before reproduction, in order to change reflectance of all of the pits; a reproducing light emitting device for emitting a reproducing light to each of the pits; a receiving device for receiving reflected light of the reproducing light reflected by the reproducing track, and generating a receiving signal corresponding to the received reflective light; and a reproducing device for reproducing the reproducing information on the basis of the receiving signal.