US4829508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carriage tilt control in an optical disk player
Assignee: Pioneer Corp
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Filing: 1988-03-07
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Granted: 1989-05-09
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Expires: 2008-03-07
Abstract
Abstract An optical disk player having a pickup which can be automatically tilted to conform to an angle of the optical disk. When the pickup fails to detect a reproducible signal, due to dropout or the like, the angle of the pickup is returned to a predetermined value.
Inventors
- 👤 Manabu Arita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/02; G11B19/04; G11B7/00; G11B7/08; G11B7/085; G11B7/0857; G11B7/08582; G11B7/09; G11B7/095; G11B7/0956
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
An optical disk player, comprising: playing means including an optical pickup for reading information from a rotating optical information recording disk; reproduction processing means for generating a reproduced signal from an information signal obtained from said playing means; tilt servo means for controlling an angle of an optical axis of said pickup; and returning means responsive to signals from said optical pickup for stopping a servo operation of said tilt servo means and for returning said angle of said optical axis of said pickup to a predetermined angle.
Claim 2
Dependent Claim
88 words
An optical disk player, comprising: playing means including an optical pickup for reading information from a rotating optical information recording disk; reproduction processing means for generating a reproduced signal from an information signal obtained from said playing means; tilt servo means for controlling an angle of an optical axis of said pickup; and returning means responsive to signals from said optical pickup for stopping a servo operation of said tilt servo means and for returning said angle of said optical axis of said pickup to a predetermined angle.
Claim 3
Dependent Claim
35 words
An optical disk player as recited in claim 1, wherein said returning means respond to a lack of generation of said reproduced signal by said reproduction processing means for initiating said stopping and said returning.
Claim 4
Dependent Claim
17 words
An optical disk player as recited in claim 2, wherein said reproduced signal is a synchronization signal.
Claim 5
Dependent Claim
34 words
An optical disk player as recited in claim 1, wherein said returning means comprises a timer and removing means responds to said lack of said reproduced signal continuing during a running of said timer.
Claim 6
Dependent Claim
22 words
An optical disk player as recited in claim 1, wherein said returning means comprises an optical detector for detecting said predetermined angle.
Claim 7
Dependent Claim
38 words
An optical disk player as recited in claim 1, wherein said tilt servo means includes a shaft along which said playing means is slidable, a rotatable base holding said shaft and rotation means for rotating said rotatable base.
Claim 8
Dependent Claim
59 words
An optical disk player as recited in claim 6, further comprising moving means for moving said playing means along said shaft between a radially inner portion and a radially outer portion of said disk and wherein said returning means are additionally responsive to said moving means moving said playing means to said radially inner portion for initiating said returning.
Claim 9
Dependent Claim
96 words
An optical disk player, comprising: playing means including an optical pickup for reading information from a rotating optical information recording disk; reproduction processing means for generating a reproduced signal from an information signal obtained from said playing means; tilt servo means for controlling an angle of an optical axis of said pickup; and returning means responsive to a lack of generation of said reproduced signal by said reproduction processing means for stopping a servo operation of said tilt servo means and for returning said angle of said optical axis of said pickup to a predetermined angle.
Claim 10
Dependent Claim
96 words
An optical disk player, comprising: playing means including an optical pickup for reading information from a rotating optical information recording disk; reproduction processing means for generating a reproduced signal from an information signal obtained from said playing means; tilt servo means for controlling an angle of an optical axis of said pickup; and returning means responsive to a lack of generation of said reproduced signal by said reproduction processing means for stopping a servo operation of said tilt servo means and for returning said angle of said optical axis of said pickup to a predetermined angle.
References Cited (Backward Citations)
EP0162614A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |