Title:
OPTICAL DISC REPLAY DEVICE
Document Type and Number:
Japanese Patent JP2014179152
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an optical disc replay device that suppresses a tracking servo from being off a track, and performs a position adjustment of a collimator at higher speed than before.SOLUTION: A coefficient k of {(SA+SD)-(SB+SC)}-k(SE-SF) of a tracking error signal (TE) is set to be smaller than an appropriate value, thereby a fluctuation width of a balance of the tracking error signal (TE) accompanied by a position displacement of a collimator 203 is suppressed, and under a control of a tracking servo, while the collimator 203 is moved in an optical axis, a position of the collimator 203 where an amount of jitter of a replay signal RF is made minimum is calculated, then, the calculated position of the collimator 203 is set and the coefficient K is restored to the appropriate value.
Inventors:
AJIMINE BENSEI
Application Number:
JP2013054189A
Publication Date:
September 25, 2014
Filing Date:
March 15, 2013
Export Citation:
Assignee:
ALPINE ELECTRONICS INC
International Classes:
G11B7/09; G11B7/126; G11B7/1392
Domestic Patent References:
| JP2012142085A | 2012-07-26 | |||
| JP2006134498A | 2006-05-25 | |||
| JP2007335048A | 2007-12-27 | |||
| JP2005228366A | 2005-08-25 | |||
| JP2008103029A | 2008-05-01 | |||
| JP2004281026A | 2004-10-07 | |||
| JP2012142085A | 2012-07-26 | |||
| JP2006134498A | 2006-05-25 | |||
| JP2007335048A | 2007-12-27 | |||
| JP2005228366A | 2005-08-25 | |||
| JP2008103029A | 2008-05-01 | |||
| JP2004281026A | 2004-10-07 |
Attorney, Agent or Firm:
Katsushi Sato