US 7,321,534 B2
Signal output method and optical information recording medium
Yoshihisa Usami, Kanagawa (Japan)
Assigned to FUJIFILM Corporation, Tokyo (Japan)
Filed on Jan. 02, 2004, as Appl. No. 10/749,380.
Claims priority of application No. 2003-001953 (JP), filed on Jan. 08, 2003.
Prior Publication US 2004/0141437 A1, Jul. 22, 2004
Int. Cl. G11B 7/0045 (2006.01); G11B 20/10 (2006.01); G11B 15/52 (2006.01)
U.S. Cl. 369—59.11  [369/47.28; 369/53.21] 36 Claims
OG exemplary drawing
 
1. A signal output method comprising:
providing a write permission signal including a repetition of a write enable interval and a pause interval;
providing a write data signal to be output during the write enable interval;
outputting a write signal including the write permission signal and the write data signal; and
writing information to an optical information recording medium by using the write signal,
wherein Tfmax denotes an output interval of a first write data signal among write data signals corresponding to a write permission signal immediately subsequent to a pause interval of the write signal in a case in which the pause interval of the write signal is a maximum,
Tfmin denotes an output interval of a first write data signal among the write data signals corresponding to a write permission signal immediately subsequent to the pause interval of the write signal in a case in which the pause interval of the write signal is a minimum,
T denotes a reference period, and
wherein the write signal is outputted so that Tfmax, Tfmin and T satisfy the following formula (1):
Tfmax−Tfmin≧0.01T, and   Formula (1):
wherein Tfmax and Tfmin actively write information to the recording medium by forming a recording pit thereon.