Patent US5751690A successfully refreshed from Google Patents.
US5751690A
Expired / Lapsed
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Optical disk having pattern displayed thereon and apparatus for manufacturing same
Assignee: Pioneer Corp
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Filing: 1997-07-07
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Granted: 1998-05-12
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Expires: 2017-07-07
Abstract
Abstract An optical disk in which a pattern such as a character that can be recognized is displayed in an information recording area by display pits or grooves formed between recording tracks constructed by pit trains indicative of information signals. An apparatus for manufacturing the optical disk in which information and display modulation light beams obtained by modulating a light beam in accordance with pattern signals for information and display, respectively, are separated from each other in the disk radial direction and are simultaneously irradiated to a resist layer formed on a recording surface of a disk.
Inventors
- 👤 Hiroyuki Ohira
- 👤 Nobuki Yamaoka
- 👤 Yutaka Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:26
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/24094; G11B7/26; G11B7/261
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
50 words
An optical disk having an information recording area in which concentrical or spiral recording tracks constructed by pit trains carrying information signals are formed, wherein display pits or grooves are formed between and without contacting said recording tracks so as to display a recognizable pattern in said information recording area.
Claim 2
Dependent Claim
50 words
An optical disk having an information recording area in which concentrical or spiral recording tracks constructed by pit trains carrying information signals are formed, wherein display pits or grooves are formed between and without contacting said recording tracks so as to display a recognizable pattern in said information recording area.
Claim 3
Dependent Claim
35 words
An optical disk according to claim 1, wherein said pattern is formed by a distributing shape of said display pits or grooves or a distributing shape of portions other than said display pits or grooves.
Claim 4
Dependent Claim
36 words
An optical disk according to claim 1, wherein a width and a depth of said display pits or grooves are equal to or less than about 1/2 of those of the pits carrying said information signal.
Claim 5
Dependent Claim
37 words
An optical disk according to claim 1, wherein a frequency band of said display pits or grooves is higher than a tracking frequency band of a tracking servo and is lower than that of said information signal.
Claim 6
Dependent Claim
23 words
An optical disk according to claim 1, wherein said display pits or grooves are formed between radially adjacent ones of said recording tracks.
Claim 7
Dependent Claim
34 words
An optical disk comprising: a plurality of tracks; and a plurality of display pits or grooves formed between and without contacting said plurality of tracks so as to display a pattern on said disk.
Claim 8
Dependent Claim
34 words
An optical disk comprising: a plurality of tracks; and a plurality of display pits or grooves formed between and without contacting said plurality of tracks so as to display a pattern on said disk.
Claim 9
Dependent Claim
35 words
An optical disk according to claim 6, wherein said pattern is formed by a distributing shape of said display pits or grooves or a distributing shape of portions other than said display pits or grooves.
Claim 10
Dependent Claim
35 words
An optical disk according to claim 6, wherein a width and a depth of said display pits or grooves are equal to or less than about 1/2 of those of pits carrying an information signal.
Claim 11
Dependent Claim
37 words
An optical disk according to claim 6, wherein a frequency band of said display pits or grooves is higher than a tracking frequency band of a tracking servo and is lower than that of an information signal.
Claim 12
Dependent Claim
22 words
An optical disk according to claim 6, wherein said display pits or grooves are formed between radially adjacent ones of said tracks.
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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) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |