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:
Apr. 06, 2004
Filed:
Feb. 13, 2003
Applicant:
Inventors:
Guo-Fu Zhou, Eindhoven, NL;
Roel Van Woudenberg, Eindhoven, NL;
Johannes H. M. Spruit, Eindhoven, NL;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 ;
U.S. Cl.
CPC ...
G11B 7/00 ;
Abstract
The application relates to methods and devices for determining the optimal erase ( ) and write powers for erasing and writing information on an optical record carrier ( ). These optimal powers are determined from two powers, P ( ) and P ( ), found at specific points, ( ) and ( ), in a curve ( ) where the normalized reflected power ( ) is plotted versus the test power ( ).