ROTATION CONTROL DEVICE, ROTATION CONTROL METHOD AND ROTATION CONTROL PROGRAM

WIPO Patent Application WO/2007/086377

A1

Provided is a rotation control device for more accurately controlling rotation of an optical disk at the time of recording information on a label surface and the like of the optical disk where recording tracks and like do not exist. The rotation control device (SR) for controlling rotation of the optical disk (DK) is provided with a pulse generating section (2) directly connected with a spindle motor (1); a speed/phase comparing section (5) for generating a speed error signal (Serd) and a first phase error signal (Ser1) which indicate rotation error based on each pulse in a pulse signal (Sfg) from the pulse generating section (2); a phase comparing section (8) for generating a second phase error signal (Ser2) which indicates a rotation error based on each pulse equivalent to timing wherein one rotation of the optical disk (DK) completes; and a driver (10) for controlling rotation of the optical disk (DK) based on the generated speed error signal (Serd), the first phase error signal (Ser1) and the second error signal (Ser2).

NAKAMURA TAKASHI (JP)

PCT/JP2007/050996

August 02, 2007

January 23, 2007

Click for automatic bibliography generation  

PIONEER CORP (JP)
NAKAMURA TAKASHI (JP)

G11B19/28; G11B7/0045; G11B23/40; H02P29/00

WO2005034125A1

2005-04-14

JPS6387189A	1988-04-18
JP2502669B2	1996-05-29
JPH02206386A	1990-08-16
JPH01202192A	1989-08-15
JP2903965B2	1999-06-14
JP2005317150A	2005-11-10

ISHIKAWA, Yasuo et al. (17-11 Shiba 2-chom, Minato-ku Tokyo, JP)

View/Download PDF      PDF Help

Previous Patent: HEAD DRIVING DEVICE AND HEAD DRIVING METHOD FOR INK JET PRINTER, AND INK JET PRINTER

Next Patent: BEST-FOCUS DETECTOR