US5502702A
Expired / Lapsed
US
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Optical disc recording device using basic recording information and projection time control
Assignee: Yamaha Corp
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Filing: 1994-08-05
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Granted: 1996-03-26
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Expires: 2014-08-05
Abstract
Abstract An optical disc recording device includes a control information memory storing a plurality of control information concerning a laser modulation system used during a recording mode for plural types of discs and a recording control circuit for inputting information of the disc type of a disc-on which recording is to be made, reading out information corresponding to the input information from the memory and carrying out contents of a control designated by the control information to achieve recording. In one aspect of the invention, for forming pits of recording pit lengths of 3T to 11T on a CD-WO optical disc using a phthalocyanine dyestuff as a recording material, the recording control circuit includes a projection time control circuit for controlling projection time of recording laser beam with respect to a pit length nT of a pit to be formed to (n-J)T-α(nT) where n is 3 to 11 j is a constant and α(3T)≧α(4T)≧α(5T)≧. . . ≧α(11T) α(3T)≧α(11T).
Inventors
- 👤 Yukihisa Nakajo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:04
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12; G11B7/125; G11B7/126; G11B7/002; G11B7/0037; G11B7/004; G11B7/0045
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
182 words
An optical disc recording device for recording on an optical disc, the optical disc recording device comprising; control information storage means for storing a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types: disc type detection means for detecting the type of the optical disc and generating information on the type of the optical disc; and recording control means for using the information on the disc type of the optical disc on which recording is to be made to read out control information corresponding to the the disc type of the optical disc from the control information storage means and for using contents of the control information to perform recording on the optical disc; wherein said control information storage means also stores basic control information which is irrelevant to the type of the optical disc; and wherein said recording control means reads out the basic control information and uses contents of the basic control information when said disc type detection means has not detected the type of the optical disc.
Claim 2
Dependent Claim
182 words
An optical disc recording device for recording on an optical disc, the optical disc recording device comprising; control information storage means for storing a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types: disc type detection means for detecting the type of the optical disc and generating information on the type of the optical disc; and recording control means for using the information on the disc type of the optical disc on which recording is to be made to read out control information corresponding to the the disc type of the optical disc from the control information storage means and for using contents of the control information to perform recording on the optical disc; wherein said control information storage means also stores basic control information which is irrelevant to the type of the optical disc; and wherein said recording control means reads out the basic control information and uses contents of the basic control information when said disc type detection means has not detected the type of the optical disc.
Claim 3
Dependent Claim
185 words
An optical disc recording device for recording on an optical disc, wherein said optical disc recording device uses a recording laser beam that forms pits of recording pit lengths of 3T to 11T on an optical disc using a phthalocyanine dyestuff, the optical disc recording device comprising: control information storage means for storing a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; recording control means for using information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the control information storage means and for using contents of the control information to perform recording on the optical disc; and projection time control means for controlling a projection time of the recording laser beam, wherein the projection time with respect to a pit length nT of a pit is set by: (n-J) T-α (nT) where n is a value between 3 to 11 J is a constant and α(3T)≧α(4T)≧α(5T)≧. . . ≧α(11T) α(3T)≧α(11T).
Claim 4
Dependent Claim
185 words
An optical disc recording device for recording on an optical disc, wherein said optical disc recording device uses a recording laser beam that forms pits of recording pit lengths of 3T to 11T on an optical disc using a phthalocyanine dyestuff, the optical disc recording device comprising: control information storage means for storing a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; recording control means for using information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the control information storage means and for using contents of the control information to perform recording on the optical disc; and projection time control means for controlling a projection time of the recording laser beam, wherein the projection time with respect to a pit length nT of a pit is set by: (n-J) T-α (nT) where n is a value between 3 to 11 J is a constant and α(3T)≧α(4T)≧α(5T)≧. . . ≧α(11T) α(3T)≧α(11T).
Claim 5
Dependent Claim
52 words
An optical disc recording device as defined in claim 2, wherein when the projection time control means forms pits of the same length, said projection time control means increases the ratio of the α(nT) to a length of 1T for each recording speed increase ratio as the recording speed increase ratio increases.
Claim 6
Dependent Claim
92 words
An optical disk recording device as defined in claim 2, wherein said recording control means further comprises laser power control means for controlling recording power of the recording laser beam, wherein said projection time control means increases the value of J when the recording speed increases ratio decreases, and decreases the value of J when the recording speed increase ratio increases, and wherein said laser power control means adjusts the laser power to a value necessary for forming a predetermined pit length using the projection time having the adjusted value of J.
Claim 7
Independent Claim
137 words
A method for recording information on an optical disc, the method comprising the steps of: storing, in a memory, a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; detecting the type of the optical disc and generating information on the type of the optical disc; using the information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the memory; recording on the optical disc using contents of the control information; storing basic control information which is irrelevant to the type of the optical disc; and reading out and using the basic control information when the information of the disc type is not detected.
Claim 8
Independent Claim
137 words
A method for recording information on an optical disc, the method comprising the steps of: storing, in a memory, a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; detecting the type of the optical disc and generating information on the type of the optical disc; using the information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the memory; recording on the optical disc using contents of the control information; storing basic control information which is irrelevant to the type of the optical disc; and reading out and using the basic control information when the information of the disc type is not detected.
Claim 9
Independent Claim
156 words
A method for recording information on an optical disc using a recording laser for forming pits of recording pit lengths of 3T to 11T on an optical disc using a phthalocyanine dyestuff, the method comprising the steps of: storing, in a memory, a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; using information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the memory; recording on the optical disc using contents of the control information; and controlling a projection time of a recording laser beam, wherein the projection time with respect to a pit length nT of a pit is set by: (n-J)T-α(nT) where n is a value between 3 to 11 J is a constant and α(3T)≧α(4T)≧α(5T)≧. . . ≧α(11T) α(3T)≧α(11T).
Claim 10
Independent Claim
156 words
A method for recording information on an optical disc using a recording laser for forming pits of recording pit lengths of 3T to 11T on an optical disc using a phthalocyanine dyestuff, the method comprising the steps of: storing, in a memory, a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; using information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the memory; recording on the optical disc using contents of the control information; and controlling a projection time of a recording laser beam, wherein the projection time with respect to a pit length nT of a pit is set by: (n-J)T-α(nT) where n is a value between 3 to 11 J is a constant and α(3T)≧α(4T)≧α(5T)≧. . . ≧α(11T) α(3T)≧α(11T).
Claim 11
Dependent Claim
181 words
An optical disc recording device for recording on an optical disc, the optical recording device, comprising: a control information storage circuit that stores a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; a disc type detection circuit that detects the type of the optical disc and generates information on the type of the optical disc; and a recording control circuit that uses the information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the control information storage circuit and that uses the control information to perform recording on the optical disc, wherein the control information storage circuit also stores basic control information which is irrelevant to the type of the optical disc; and wherein said recording control circuit reads out the basic control information and uses contents of the basic control information when said disc type detection circuit has not detected the type of the optical disc.
Claim 12
Dependent Claim
181 words
An optical disc recording device for recording on an optical disc, the optical recording device, comprising: a control information storage circuit that stores a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; a disc type detection circuit that detects the type of the optical disc and generates information on the type of the optical disc; and a recording control circuit that uses the information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the control information storage circuit and that uses the control information to perform recording on the optical disc, wherein the control information storage circuit also stores basic control information which is irrelevant to the type of the optical disc; and wherein said recording control circuit reads out the basic control information and uses contents of the basic control information when said disc type detection circuit has not detected the type of the optical disc.
Claim 13
Dependent Claim
179 words
An optical disc recording device for recording on an optical disk and that uses a recording laser beam that forms pits of recording pit lengths of 3T to 11T on an optical disc using a phthalocyanine dyestuff, the optical disc recording device comprising: a control information storage circuit that stores a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; a recording control circuit that uses information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the control information storage circuit and that uses control information to perform recording on the optical disc; and a projection time control circuit that controls a projection time of the recording laser beam, wherein the projection time with respect to a pit length nT of a pit is set by: (n-J)T-α(nT) where n is a value between 3 to 11 J is a constant and α(3T)≧α(4T)≧α(5T)≧. . . ≧α(11T) α(3T)≧α(11T).
Claim 14
Dependent Claim
179 words
An optical disc recording device for recording on an optical disk and that uses a recording laser beam that forms pits of recording pit lengths of 3T to 11T on an optical disc using a phthalocyanine dyestuff, the optical disc recording device comprising: a control information storage circuit that stores a plurality of control information for controlling a laser modulation system used during a recording mode for a plurality of disc types; a recording control circuit that uses information on the disc type of an optical disc on which recording is to be made to read out control information corresponding to the disc type of the optical disc from the control information storage circuit and that uses control information to perform recording on the optical disc; and a projection time control circuit that controls a projection time of the recording laser beam, wherein the projection time with respect to a pit length nT of a pit is set by: (n-J)T-α(nT) where n is a value between 3 to 11 J is a constant and α(3T)≧α(4T)≧α(5T)≧. . . ≧α(11T) α(3T)≧α(11T).
Claim 15
Dependent Claim
54 words
An optical disc recording device as defined in claim 8, wherein when the projection time control circuit forms pits of the same length, and wherein the projection time control circuit increases the ratio of the α(nT) to a length of 1T for each recording speed increase ratio as the recording speed increase ration increases.
Claim 16
Dependent Claim
94 words
An optical disk recording device as defined in claim 8, wherein the recording control circuit further includes a laser power control circuit that controls a recording power of the recording laser beam, wherein the projection time control circuit increases the value of J when the recording speed increase ratio decreases, and decreases the value of J when the recording speed increase ratio increases, and wherein the laser power control circuit adjusts the laser power to a value necessary for forming a predetermined pit length using the projection time having the adjusted value of J.
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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) | 1999-03-26 | 1999-09-25 | 2000-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-26 | 2003-09-25 | 2004-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-26 | 2007-09-25 | 2008-03-26 | $7700.00 | Window Closed / Lapsed |