US5345435A
Expired / Lapsed
US
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Optical disc and method for recording on optical disc
Assignee: Sony Corp
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Filing: 1992-08-26
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Granted: 1994-09-06
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Expires: 2012-08-26
Abstract
Abstract An optical disc having a plurality of recording zones, each having 2n tracks, with the recording capacity of each track in a given zone being equal and the recording capacity being different for each recording zone, and with a line recording density of each recording zone being approximately equal.
Inventors
- 👤 Yoshimori Yamasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:39
CPC Classifications
G; G11; G11B; G11B7/00; G11B11/00; G11B11/10; G11B11/105; G11B11/10502; G11B11/10504; G11B11/1053; G11B11/10595; G11B11/10597; G11B20/00; G11B20/10; G11B20/12; G11B20/1217; G11B20/1258; G11B7/004; G11B7/005; G11B7/007; G11B7/0079; G11B7/24; G11B7/2407; G11B7/24073; G11B7/24079
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
An optical disc having formed thereon plural tracks for recording information data and comprising: a recording region subdivided into plural recording zones each having 2 n tracks, n being an integer natural number, with each track in a given recording zone having a same recording capacity which is different from a recording capacity of tracks in different recording zones, and wherein a line recording density within the recording zones is approximately equal.
Claim 2
Dependent Claim
72 words
An optical disc having formed thereon plural tracks for recording information data and comprising: a recording region subdivided into plural recording zones each having 2 n tracks, n being an integer natural number, with each track in a given recording zone having a same recording capacity which is different from a recording capacity of tracks in different recording zones, and wherein a line recording density within the recording zones is approximately equal.
Claim 3
Dependent Claim
42 words
A recording method according to claim 1, wherein the information data are recorded in accordance with a magnetic field modulating system which is a system consisting in changing a waveform rise and fall timings depending on an intensity of a recording magnetism.
Claim 4
Dependent Claim
34 words
A recording method according to claim 1, wherein the information data are recorded in accordance with a mark length recording system which is a system consisting in inverting a level of a recording waveform.
Claim 5
Dependent Claim
44 words
A recording method according to claim 1, wherein the information data are recorded in accordance with an edge recording system which is a system consisting in recording based on a rising and a falling edge of a readout waveform of recording data during readout.
Claim 6
Dependent Claim
73 words
An optical disc having recording tracks formed thereon, in which information data are recorded, at a pitch narrower than 1.6 μm, wherein the improvement comprises: that a reciprocal of a line recording density of circumferential recording tracks is 1.0 to 0.6 μm/bit, and wherein that a recording region on which information data are recorded according to an edge recording system is subdivided into 2 to 10 recording zones at intervals of plural tracks.
Claim 7
Dependent Claim
73 words
An optical disc having recording tracks formed thereon, in which information data are recorded, at a pitch narrower than 1.6 μm, wherein the improvement comprises: that a reciprocal of a line recording density of circumferential recording tracks is 1.0 to 0.6 μm/bit, and wherein that a recording region on which information data are recorded according to an edge recording system is subdivided into 2 to 10 recording zones at intervals of plural tracks.
Claim 8
Independent Claim
82 words
A method for recording on an optical disc, comprising the steps of: forming a plurality of tracks on the optical disc, the tracks having a pitch narrower than 1.6 μm, forming each track to have a reciprocal of a line recording density in a circumferential direction to be 1.0 to 0.6 μm/bit, and subdividing a recording region of the optical disc into 2 to 10 recording zones at intervals of plural tracks and carrying out recording according to an edge recording system.
Claim 9
Independent Claim
82 words
A method for recording on an optical disc, comprising the steps of: forming a plurality of tracks on the optical disc, the tracks having a pitch narrower than 1.6 μm, forming each track to have a reciprocal of a line recording density in a circumferential direction to be 1.0 to 0.6 μm/bit, and subdividing a recording region of the optical disc into 2 to 10 recording zones at intervals of plural tracks and carrying out recording according to an edge recording system.
Claim 10
Independent Claim
92 words
A method for recording information data in a recording region of an optical disc comprising the steps of: subdividing the recording region of the optical disc into plural recording zones each having 2 n tracks, n being an integer natural number, and recording the information data so that each track in a given recording zone has a same recording capacity, which is different from a recording capacity of tracks in the other recording zones of the plurality of recording zones, and a line recording density within the recording zones is substantially equal.
Claim 11
Independent Claim
92 words
A method for recording information data in a recording region of an optical disc comprising the steps of: subdividing the recording region of the optical disc into plural recording zones each having 2 n tracks, n being an integer natural number, and recording the information data so that each track in a given recording zone has a same recording capacity, which is different from a recording capacity of tracks in the other recording zones of the plurality of recording zones, and a line recording density within the recording zones is substantially equal.
Claim 12
Dependent Claim
71 words
An optical disc having recording tracks formed thereon on which information data are recorded, wherein the improvement comprises: that the tracks are formed at a pitch narrower than 1.6 μm, a reciprocal of a line recording density of circumferential recording tracks is 1.0 to 0.7 μm/bit, and wherein a recording region on which the information data are recorded is subdivided into 2 to 10 recording zones at intervals of plural tracks.
Claim 13
Dependent Claim
71 words
An optical disc having recording tracks formed thereon on which information data are recorded, wherein the improvement comprises: that the tracks are formed at a pitch narrower than 1.6 μm, a reciprocal of a line recording density of circumferential recording tracks is 1.0 to 0.7 μm/bit, and wherein a recording region on which the information data are recorded is subdivided into 2 to 10 recording zones at intervals of plural tracks.
Claim 14
Independent Claim
77 words
A method for recording information data in a recording region of an optical disc on which plural recording tracks are formed, comprising the steps of: forming the recording tracks so that the recording tracks have a pitch narrower than 1.6 μm, forming circumferential recording tracks to have a reciprocal of a line recording density of 1.0 to 0.7 μm/bit, and subdividing each recording zone into plural tracks, the number of the recording zones being 2 to 10.
Claim 15
Independent Claim
77 words
A method for recording information data in a recording region of an optical disc on which plural recording tracks are formed, comprising the steps of: forming the recording tracks so that the recording tracks have a pitch narrower than 1.6 μm, forming circumferential recording tracks to have a reciprocal of a line recording density of 1.0 to 0.7 μm/bit, and subdividing each recording zone into plural tracks, the number of the recording zones being 2 to 10.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-05 | 1998-03-07 | 1998-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-05 | 2002-03-07 | 2002-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-05 | 2006-03-07 | 2006-09-06 | $7700.00 | Window Closed / Lapsed |