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:
Nov. 14, 2006
Filed:
Aug. 20, 2002
Gerardus Rudolph Langereis, Eindhoven, NL;
Benno Tieke, Eindhoven, NL;
Gerardus Rudolph Langereis, Eindhoven, NL;
Benno Tieke, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An optical record carrier recording method forms pits and lands by directing a radiation beam () onto a recording surface () of an optical record carrier (). The radiation beam for each pit to be recorded is set to at least one write power level (P) capable of forming a pit during a write power irradiation period () and, for each land between the pits, to at least one bottom power level (P) incapable of forming a pit during a bottom power irradiation period (). In order to embed bits of an additional LML channel in the main channel without increasing the overall jitter, the bottom power level (P) is temporarily raised to an LML land power level (P) during an LML land irradiation period () for forming an LML land, the LML land power level (P) being close to the write power level (P), and that the write power level (P) is temporarily lowered to an LML pit power level (P) during an LML pit irradiation period () for forming an LML pit, the LML pit power level (P) being close to the bottom power level (P).