US5289451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical information recording/reproduction apparatus including means for detecting the type of recording medium
Assignee: Canon Inc
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Filing: 1992-09-30
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Granted: 1994-02-22
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Expires: 2012-09-30
Abstract
Abstract An optical information recording/reproducing apparatus for stably recording, reproducing, or erasing the information by a laser beam with respect to different kinds of optical disks is represented. This apparatus includes a processor to record, reproduce, or erase the information for an optical disk, a disk sort detector to detect the sort of optical disk, and a controller to control the processing parameters of the processor in response to an output signal from the disk sort detector. The disk sort detector reads the disk sort identifying information preliminarily recorded on the optical disk by the processor to detect the sort of disk. Or, this detector irradiates light onto labels having different reflection factors or transmission factors preliminarily provided on the optical disks by the processor and detects the reflected light amounts or transmitted light amounts from the labels, thereby detecting the sort of disk. The optical disks include disks of the type only for use of reproduction, the rerecordable type, and the writable type.
Inventors
- 👤 Takaaki Ashinuma
- 👤 Shigeru Aoi
- 👤 Makoto Shiho
- 👤 Yasuo Suzuki
- 👤 Takehiko Shibata
- 👤 Masaharu Tsukada
- 👤 Nobuhiro Kasama
- 👤 Takayuki Aizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:36
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12; G11B7/125; G11B7/126; G11B19/00; G11B19/02; G11B20/00; G11B20/10; G11B23/00; G11B23/38; G11B27/00; G11B27/02; G11B27/031; G11B27/034; G11B27/36; G11B7/002; G11B7/0037; G11B7/004; G11B7/08; G11B7/09; H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/211; G11B2220/215; G11B2220/218; G11B2220/25; G11B2220/2537; G11B2220/2545
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
186 words
An information recording apparatus comprising: recording means for recording information on a recording medium having at least one information track recorded thereon; identifying means for identifying the difference between recording media which employ different recording and reproducing methods, respectively, wherein said identifying means comprises reading means for reading out identification code information from said at least one information track with the same reading operation condition regardless of the difference between the recording media and means for identifying the difference between recording media on the basis of the identification code information read out by said reading means, said difference between recording media to be identified, being at least two types selected from only-reproducible type media, writable-and reproducible type media and writable-reproducible-erasable type media; and control means for performing a control operation controlling an operation parameter of said recording means in response to the type of recording medium identified by said identifying means when the type of the recording medium is identified by said identifying means, and for cancelling performance of the control operation when the type of the recording medium is not identified by said identifying means.
Claim 2
Dependent Claim
186 words
An information recording apparatus comprising: recording means for recording information on a recording medium having at least one information track recorded thereon; identifying means for identifying the difference between recording media which employ different recording and reproducing methods, respectively, wherein said identifying means comprises reading means for reading out identification code information from said at least one information track with the same reading operation condition regardless of the difference between the recording media and means for identifying the difference between recording media on the basis of the identification code information read out by said reading means, said difference between recording media to be identified, being at least two types selected from only-reproducible type media, writable-and reproducible type media and writable-reproducible-erasable type media; and control means for performing a control operation controlling an operation parameter of said recording means in response to the type of recording medium identified by said identifying means when the type of the recording medium is identified by said identifying means, and for cancelling performance of the control operation when the type of the recording medium is not identified by said identifying means.
Claim 3
Dependent Claim
17 words
An information recording apparatus according to claim 1, wherein said recording medium includes an optical recording medium.
Claim 4
Dependent Claim
40 words
An information recording apparatus according to claim 1, wherein said reading means includes irradiating means for irradiating a light beam, and wherein said reading means reads the identification information by irradiating a predetermined quantity of light onto said recording medium.
Claim 5
Dependent Claim
48 words
An information recording apparatus according to claim 1, further comprising detecting means for detecting when said recording medium has been loaded into said apparatus, wherein said identifying means automatically starts an identifying operation when said detecting means detects that said recording medium has been loaded into said apparatus.
Claim 6
Dependent Claim
38 words
An information recording apparatus according to claim 4, wherein the identification information has been recorded onto a predetermined recording track of said recording medium and wherein said identifying means moves said reading means to said predetermined recording track.
Claim 7
Dependent Claim
35 words
An information recording apparatus according to claim 1, wherein said recording means includes a head for recording information onto said recording track of said recording medium and wherein said head serves as said reading means.
Claim 8
Dependent Claim
40 words
An information recording apparatus according to claim 1, wherein said identifying means sets an operation parameter of said reading means at a predetermined value, and wherein said reading means reads out the identification information in accordance with the operation parameter.
Claim 9
Dependent Claim
34 words
An information recording apparatus according to claim 1, wherein said recording means includes irradiating means for irradiating a light beam and wherein said control means controls a quantity of light from said irradiating means.
Claim 10
Dependent Claim
36 words
An information recording apparatus according to claim 1, wherein said recording means includes a tracking control circuit for tracking said recording medium, and wherein said control means controls a servo gain of said tracking control circuit.
Claim 11
Dependent Claim
39 words
An information recording apparatus according to claim 1, wherein said recording means includes an error correcting circuit and wherein said control means controls a redundancy of said error correcting circuit in response to the identifying by said identifying means.
Claim 12
Dependent Claim
187 words
An information reproducing apparatus comprising: reproducing means for reproducing information from a recording medium having at least one information track recorded thereon; identifying means for identifying the difference between recording media which employ different recording and reproducing methods, respectively, wherein said identifying means includes reading means for reading out identification code information from said at least one information track with the same reading operation condition regardless of the difference between the recording media and means for identifying the difference between the recording media on the basis of the identification code information read out by said reading means, said difference between recording media to be identified, being at least two types selected from only-reproducible type media, writable-and reproducible type media and writable-reproducible-erasable type media; and control means for performing a control operation controlling an operation parameter of said reproducing means in response to the type of recording medium identified by said identifying means when the type of the recording medium is identified by said identifying means, and for cancelling performance of the control operation when the type of the recording medium is not identified by said identifying means.
Claim 13
Dependent Claim
187 words
An information reproducing apparatus comprising: reproducing means for reproducing information from a recording medium having at least one information track recorded thereon; identifying means for identifying the difference between recording media which employ different recording and reproducing methods, respectively, wherein said identifying means includes reading means for reading out identification code information from said at least one information track with the same reading operation condition regardless of the difference between the recording media and means for identifying the difference between the recording media on the basis of the identification code information read out by said reading means, said difference between recording media to be identified, being at least two types selected from only-reproducible type media, writable-and reproducible type media and writable-reproducible-erasable type media; and control means for performing a control operation controlling an operation parameter of said reproducing means in response to the type of recording medium identified by said identifying means when the type of the recording medium is identified by said identifying means, and for cancelling performance of the control operation when the type of the recording medium is not identified by said identifying means.
Claim 14
Dependent Claim
17 words
An information reproduction apparatus according to claim 11, wherein said recording medium includes an optical recording medium.
Claim 15
Dependent Claim
40 words
An information reproducing apparatus according to claim 12, wherein said reading means includes irradiating means for irradiating a light beam, and wherein said reading means reads the information identification by irradiating a predetermined quantity of light onto said recording medium.
Claim 16
Dependent Claim
37 words
An information reproducing apparatus according to claim 11, wherein said reproducing means includes a head for reading the information recorded on said recording track of said recording medium and wherein said head serves as said reading means.
Claim 17
Dependent Claim
40 words
An information reproducing apparatus according to claim 11, wherein said identifying means sets an operation parameter of said reading means at a predetermined value, and wherein said reading means reads out the identification information in accordance with the operation parameter.
Claim 18
Dependent Claim
34 words
An information reproducing apparatus according to claim 11, wherein said reproducing means includes irradiating means for irradiating a light beam and wherein said control means controls a quantity of light from said irradiating means.
Claim 19
Dependent Claim
36 words
An information reproducing apparatus according to claim 11, wherein said reproducing means includes a tracking control circuit for tracking said recording medium, and wherein said control means controls a servo gain of said tracking control circuit.
Claim 20
Dependent Claim
62 words
An information reproducing apparatus according to claim 11, wherein said reproducing means includes a head for reading out the information recorded on said recording track of said recording medium and a signal processing circuit for amplifying and processing a signal corresponding to the information read out by said head, and wherein said control means controls a gain of said signal processing circuit.
Claim 21
Dependent Claim
42 words
An information reproduction apparatus according to claim 18, wherein said signal processing circuit includes a feedback loop having a feedback resistance and wherein said control means controls a value of said feedback resistance in response to the identifying by said identifying means.
Claim 22
Dependent Claim
44 words
An information reproduction apparatus according to claim 18, wherein said signal processing circuit includes a resistance for changing a level of said amplified signal, and wherein said control means controls a value of said resistance in response to the identifying by said identifying means.
Claim 23
Dependent Claim
48 words
An information reproducing apparatus according to claim 11, further comprising detecting means for detecting when said recording medium has been loaded into said apparatus, wherein said identifying means automatically starts an identifying operation when said detecting means detects that said recording medium has been loaded into said apparatus.
Claim 24
Dependent Claim
38 words
An information reproduction apparatus according to claim 21, wherein the identification information has been recorded onto a predetermined recording track of said recording medium and wherein said detecting means moves said reading means to said predetermined recording track.
Claim 25
Dependent Claim
39 words
An information reproduction apparatus according to claim 11, wherein said reproducing means includes an error correcting circuit and wherein said control means controls a redundancy of said error correcting circuit in response to the identifying by said identifying means.
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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) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |