Circuit for controlling optical pickup position in optical disc

Details Circuit for controlling optical pickup position in optical disc Circuit for controlling optical pickup position in optical disc

1992-01-27

1994-02-22

Psitos, Aristotelis

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 32, 369199, 369215, 369 56, G11B 700

Patent

active

052894495

ABSTRACT:
A circuit for controlling the optical pickup position in an optical disc reproducing apparatus is constructed such that when the power is applied, a user recognizes the position of the pickup which is used to pickup information from a disc with information recorded on both sides, by recognizing whether the pickup is facing the upward side or downward side of the disc. The circuit further controls the pickup to be positioned on the innermost circumference of the reproducing side in the reproducing stop or ending operation. Therefore, the time needed to recognize which the first reproducing side for successive reproducing is decreased, while reducing power consumption needed to move the pickup in the reproducing stop operation.

REFERENCES:
patent: 4839881 (1989-06-01), Takahara et al.
patent: 4841505 (1989-06-01), Aoyagi
patent: 4903140 (1990-02-01), Okamoto et al.
patent: 4926409 (1990-05-01), Tsuyuguchi et al.

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