Title:
OPTICAL DISK DEVICE AND RECORDING/PLAYBACK DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/080202
Kind Code:
A1
Abstract:
An optical disk device (2) comprises: an optical pickup (4) which includes a first laser beam source (10) that emits a laser beam, an objective lens (24) that converges, onto an optical disk (8), the laser beam emitted from the first laser beam source (10), and a light receiving element (30) that receives reflected light from the optical disk (8) and that performs photoelectric conversion of the received reflected light so as to output a light reception signal; an FS signal generation unit (54) which on the basis of the light reception signal from the light receiving element (30) generates an FS signal that indicates the amount of the reflected light from the optical disk (8); and a dirtiness determination unit (56) which, when the peak level of the FS signal is less than a dirtiness determination threshold, determines that the optical pickup (4) is dirty and controls the light receiving element (30) such that the peak level of the light reception signal from the light receiving element (30) is increased.
Inventors:
KUZE YUUICHI
YAJIMA MASATOSHI
KONISHI SHINICHI
NISHIOKA AKIHIKO
YAJIMA MASATOSHI
KONISHI SHINICHI
NISHIOKA AKIHIKO
Application Number:
PCT/JP2021/036927
Publication Date:
April 21, 2022
Filing Date:
October 06, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G11B7/004; G11B7/005; G11B7/095; G11B7/125; G11B7/1275
Foreign References:
| JP2012190505A | 2012-10-04 | |||
| JP2007122850A | 2007-05-17 | |||
| JP2011008855A | 2011-01-13 | |||
| JPH0765389A | 1995-03-10 | |||
| JP2005149703A | 2005-06-09 | |||
| JP2006228401A | 2006-08-31 | |||
| JP2009283100A | 2009-12-03 |
Attorney, Agent or Firm:
NII, Hiromori et al. (JP)
Download PDF:
Previous Patent: DISPLAY DEVICE, ELECTRONIC DEVICE, AND MOVING OBJECT
Next Patent: GLASS LAMINATE AND METHOD FOR MANUFACTURING SAME
Next Patent: GLASS LAMINATE AND METHOD FOR MANUFACTURING SAME