US4855978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video/compact disk player having reduced track search time
Assignee: Pioneer Corp
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Filing: 1987-11-24
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Granted: 1989-08-08
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Expires: 2007-11-24
Abstract
Abstract A player system for a video disk or a compact audio disk in which the time to move the pickup to the start of a playing position of a selection other than at the beginning of the disk is considerably reduced. The pickup is first moved to a position substantially at the middle of the area containing recorded information on the disk in a single quick motion. Then a search operation is begun for the address of the desired selection. The speed of the disk is also controlled so that when the pickup reaches the middle of the disk playback can begin immediately.
Inventors
- 👤 Hitoshi Kanamaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:01
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083; G11B7/00; G11B7/08; G11B7/085; G11B7/08505
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
268 words
A disk player system comprising: pickup means for reading information recorded on a disk being played; means for moving said pickup means radially of said disk; first controlling means for controlling a radial position of said pickup means during a normal playing operation; first instructing means for instructing said pickup moving means to move said pickup means to a program-start position of a designated program recorded on said disk so as to commence a playback operation at said program-start position; motor means for rotating said disk; second controlling means for controlling said motor means to rotate at an appropriate speed during said normal playing operation; second instructing means for instructing said motor means to start rotating said disk when said pickup means is being moved to said program-start position so that, when said pickup means arrives at said program-start position, said disk will be rotating at a speed proper for reading information from said disk by said pickup means at said program-start position; first switch means for selectively connecting said pickup moving means to said first controlling means or said first instructing means; second switch means for selectively connecting said motor means to said second controlling means or said second instructing means; and start instructing means for simultaneously controlling both said first and second switches to simultaneously connect said pickup moving means to said first instructing means and said motor means to said second instructing means to start a play operation, then simultaneously connecting said pickup moving means to said first controlling means and said motor means to said second controlling means to allow said normal playing operation.
Claim 2
Dependent Claim
268 words
A disk player system comprising: pickup means for reading information recorded on a disk being played; means for moving said pickup means radially of said disk; first controlling means for controlling a radial position of said pickup means during a normal playing operation; first instructing means for instructing said pickup moving means to move said pickup means to a program-start position of a designated program recorded on said disk so as to commence a playback operation at said program-start position; motor means for rotating said disk; second controlling means for controlling said motor means to rotate at an appropriate speed during said normal playing operation; second instructing means for instructing said motor means to start rotating said disk when said pickup means is being moved to said program-start position so that, when said pickup means arrives at said program-start position, said disk will be rotating at a speed proper for reading information from said disk by said pickup means at said program-start position; first switch means for selectively connecting said pickup moving means to said first controlling means or said first instructing means; second switch means for selectively connecting said motor means to said second controlling means or said second instructing means; and start instructing means for simultaneously controlling both said first and second switches to simultaneously connect said pickup moving means to said first instructing means and said motor means to said second instructing means to start a play operation, then simultaneously connecting said pickup moving means to said first controlling means and said motor means to said second controlling means to allow said normal playing operation.
Claim 3
Dependent Claim
30 words
The disk player system of claim 1, wherein said program-start position is substantially at a middle position, in a radial direction of said disk, of an area containing recorded information.
Claim 4
Dependent Claim
33 words
The disk player system of claim 2, wherein said first instructing means comprises means for supplying an instructing voltage to said pickup moving means for moving said pickup means to said program-start position.
Claim 5
Dependent Claim
28 words
The disk player system of claim 3, wherein said second instructing means comprises means for setting a speed of rotation of said disk in response to said voltage.
Claim 6
Dependent Claim
34 words
The disk player system of claim 1, wherein said first instructing means comprises means for supplying an instructing digital signal to said pickup moving means for moving said pickup means to said program-start position.
Claim 7
Dependent Claim
25 words
The disk player of claim 5, wherein said pickup moving means comprises a digital-to-analog converter for converting said instructing digital signal to an analog voltage.
Claim 8
Dependent Claim
32 words
The disk player system of claim 6, wherein said second instructing means comprises means for setting a speed of rotation of said disk in response to an output of said digital-to-analog converter.
Claim 9
Dependent Claim
29 words
The disk player system of claim 5, wherein said second instructing means comprises means for setting a speed of rotation of said disk in response to said digital signal.
Claim 10
Dependent Claim
54 words
The disk player system of claim 1, further comprising means for detecting a radial position of said pickup means relative to said disk, and wherein said second instructing means comprises means for establishing a speed of rotation of said disk in response to an output of said detecting means representative of said radial position.
Claim 11
Dependent Claim
17 words
The disk player system of claim 1, wherein said disk is a constant linear velocity type disk.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |