Title:
OPTICAL PICKUP CONTROL DEVICE AND OPTICAL PICKUP CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2017/183575
Kind Code:
A1
Abstract:
Provided is an optical pickup control device that comprises a signal detection unit (30), a central control unit (50), and an actuator drive unit (40). The signal detection unit (30) detects offset of an objective lens (24) with respect to a reference position as a lens error signal (S8). The central control unit (50) applies lens midpoint control to the objective lens (24). The actuator drive unit (40) sends a drive signal (S10) to an actuator (26) that moves the objective lens (24). The central control unit (50), before making adjustments on the basis of a tracking error signal (S7) to change the amplitude of the tracking error signal (S7) or the offset of the tracking error signal (S7), measures the drive signal (S10) with which the lens midpoint control is applied as a lens midpoint control drive signal and, when making adjustments to change the amplitude or offset, adds an offset drive signal based on the lens midpoint control drive signal to the drive signal (S10).
Inventors:
KANATAKE YUSUKE (JP)
TAKESHITA NOBUO (JP)
TAKESHITA NOBUO (JP)
Application Number:
PCT/JP2017/015289
Publication Date:
October 26, 2017
Filing Date:
April 14, 2017
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G11B7/09; G11B7/005
Foreign References:
| JP2012190525A | 2012-10-04 | |||
| JPH11259875A | 1999-09-24 | |||
| JP2007305249A | 2007-11-22 | |||
| JP2009266311A | 2009-11-12 | |||
| JP2009289363A | 2009-12-10 |
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
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