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.:

US 7864646 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 04, 2011

Filed:

Feb. 15, 2006
Applicants:

Osamu Tsukahara, Tokyo, JP;

Tomo Kishigami, Tokyo, JP;

Yoshihiro Kiyose, Tokyo, JP;

Inventors:

Osamu Tsukahara, Tokyo, JP;

Tomo Kishigami, Tokyo, JP;

Yoshihiro Kiyose, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An optical recording method and optical recording device using a multi-pulse write strategy to record on an optical disc by recording a signal (S), reading the peak level of signals corresponding to spaces in the recorded signal (S), comparing the peak levels of the signals corresponding to the spaces separately according to the length of the pattern corresponding to the immediately preceding mark (S), and modifying the pulse width of the multi-pulses in the write strategy accordingly (S-S). An optical recording method and optical recording device can thereby be obtained that can adjust the pulse width of the multi-pulses in the write strategy to the optimum value and perform optimal recording on the optical disc.


Find Patent Forward Citations

Tsukahara, Osamu. (2011). Optical recording medium, optical recording device, and optical recording and reproducing device (U.S. Patent No. 7864646). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7864646

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