US5483512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical information recording/reproducing device
Assignee: Pioneer Corp
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Filing: 1994-04-05
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Granted: 1996-01-09
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Expires: 2014-04-05
Abstract
Abstract A device for recording information on a recordable optical disk includes: an optical pickup provided with laser unit for emitting and irradiating a laser beam onto the optical disk; radial tilt detecting unit for detecting tilt quantity of the optical disk in a radial direction thereof; tangential tilt detecting unit for detecting tilt quantity of the optical disk in a tangential direction thereof; radial tilt correcting mechanism for moving the pickup on the basis of the radial tilt quantity to correct the radial tilt; and tangential tilt correcting unit for controlling the power of the laser beam on the basis of the tangential tilt quantity.
Inventors
- 👤 Naoharu Yanagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:56
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12; G11B7/125; G11B7/126; G11B7/08; G11B7/09; G11B7/095; G11B7/0956
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
67 words
A device for recording information on a recordable optical disk comprising: laser unit for emitting and irradiating a laser beam onto the optical disk; tilt detecting unit for detecting a tilt quantity of the optical disk in a tangential direction thereof; and laser power control unit for controlling the power of the laser beam on the basis of the tilt quantity detected by the tilt detecting unit.
Claim 2
Independent Claim
67 words
A device for recording information on a recordable optical disk comprising: laser unit for emitting and irradiating a laser beam onto the optical disk; tilt detecting unit for detecting a tilt quantity of the optical disk in a tangential direction thereof; and laser power control unit for controlling the power of the laser beam on the basis of the tilt quantity detected by the tilt detecting unit.
Claim 3
Dependent Claim
32 words
A device according to claim 1, wherein said laser power control unit controls the laser unit so that the power of the laser beam is increased when the tilt quantity is large.
Claim 4
Dependent Claim
31 words
A device according to claim 2, wherein said laser power control unit adds a margin power to the power of the laser beam when the tilt quantity exceeds a predetermined quantity.
Claim 5
Dependent Claim
58 words
A device according to claim 1, wherein said tilt detecting unit comprises: a plurality of photodetecting elements for receiving the laser beam reflected by the optical disk and producing electrical signal, respectively, and operation unit for comparing the electrical signals and calculating the tilt quantity, said photodetecting elements are arranged in the tangential direction of the optical disk.
Claim 6
Dependent Claim
37 words
A device according to claim 1, further comprising an optical pickup, and said tilt detecting unit detecting the tilt quantity on the basis of a current value flowing through an actuator coil provided in the optical pickup.
Claim 7
Independent Claim
105 words
A device for recording information on a recordable optical disk comprising: an optical pickup provided with laser unit for emitting and irradiating a laser beam onto the optical disk; radial tilt detecting unit for detecting tilt quantity of the optical disk in a radial direction thereof; tangential tilt detecting unit for detecting tilt quantity of the optical disk in a tangential direction thereof; radial tilt correcting mechanism for moving the pickup on the basis of the radial tilt quantity to correct the radial tilt; and tangential tilt correcting unit for controlling the power of the laser beam on the basis of the tangential tilt quantity.
Claim 8
Independent Claim
105 words
A device for recording information on a recordable optical disk comprising: an optical pickup provided with laser unit for emitting and irradiating a laser beam onto the optical disk; radial tilt detecting unit for detecting tilt quantity of the optical disk in a radial direction thereof; tangential tilt detecting unit for detecting tilt quantity of the optical disk in a tangential direction thereof; radial tilt correcting mechanism for moving the pickup on the basis of the radial tilt quantity to correct the radial tilt; and tangential tilt correcting unit for controlling the power of the laser beam on the basis of the tangential tilt quantity.
Claim 9
Dependent Claim
31 words
A device according to claim 6, wherein said tangential tilt correcting unit adds a margin power to the power of the laser beam when the tilt quantity exceeds a predetermined quantity.
Claim 10
Dependent Claim
60 words
A device according to claim 6, wherein said tangential tilt detecting unit comprises: a plurality of photodetecting elements for receiving the laser beam reflected by the optical disk and producing electrical signals, respectively, and operation unit for comparing the electrical signals and calculating the tangential tilt quantity, said photodetecting elements are arranged in the tangential direction of the optical disk.
Claim 11
Dependent Claim
35 words
A device according to claim 6, wherein said tangential tilt detecting unit detects the quantity of tangential tilt on the basis of a current value flowing through an actuator coil provided in the optical pickup.
Claim 12
Dependent Claim
39 words
A device according to claim 6, further comprising unit for detecting a quantity of high frequency component of the radial tilt and controlling the power of the laser beam on the basis of the quantity of high frequency component.
Claim 13
Independent Claim
106 words
A device for recording information on a recordable optical disk comprising: an optical pickup provided with laser for emitting and irradiating a laser beam onto the optical disk; radial tilt detecting unit for detecting tilt quantity of the optical disk in a radial direction thereof; tangential tilt detecting unit for detecting tilt quantity of the optical disk in a tangential direction thereof; operation unit for calculating scholar value of tilt quantity on the basis of the quantity of radial tilt and the quantity of tangential tilt; and tilt correcting unit for controlling the power of the laser beam on the basis of the scholar value calculated.
Claim 14
Independent Claim
106 words
A device for recording information on a recordable optical disk comprising: an optical pickup provided with laser for emitting and irradiating a laser beam onto the optical disk; radial tilt detecting unit for detecting tilt quantity of the optical disk in a radial direction thereof; tangential tilt detecting unit for detecting tilt quantity of the optical disk in a tangential direction thereof; operation unit for calculating scholar value of tilt quantity on the basis of the quantity of radial tilt and the quantity of tangential tilt; and tilt correcting unit for controlling the power of the laser beam on the basis of the scholar value calculated.
Claim 15
Dependent Claim
58 words
A device according to claim 11, wherein said operation unit comprises: square circuits for calculating square values of the quantity of radial tilt and the quantity of tangential tilt, an adder for adding the square values calculated, and a square-root circuit for calculating a square-root of the added value to produce the scholar value of the tilt quantity.
Claim 16
Dependent Claim
30 words
A device according to claim 11, wherein said tilt correcting unit adds a margin power to the power of the laser beam when the tilt quantity exceeds a predetermined quantity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-08 | 1999-07-10 | 2000-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-08 | 2003-07-10 | 2004-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-08 | 2007-07-10 | 2008-01-09 | $7700.00 | Window Closed / Lapsed |