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US 7,460,442 B2Granted
Optical disk apparatus
AssigneeSony Corporation
InventorTakashi Nagatomo
Life of this patent
Estimating the term…
Abstract
An optical disk apparatus for controlling two optical pickups in an optimized way in response to operation modes for rotating the optical disk. When receiving a request for seeking one optical pickup from a HOST, a CPU judges whether to move the other optical pickup synchronously to satisfy positional restriction of the two optical pickups. Furthermore, when operating one optical pickup upon, for example, a read request. from the HOST, the CPU judges whether to move the other pickup to follow.
Claims22
An optical disk apparatus comprising:
- a first optical pickup and a second optical pickup for reading/writing data on the optical disk;
- a motor for rotating the optical disk, said motor operating in at least (i) a first region of the optical disk at a first velocity and (ii) a second region of the optical disk at a second velocity;
- and
- an optical disk controlling unit for managing addresses on the optical disk and for controlling the first optical pickup and the second optical pickup so that the optical pickups are positioned at desired addresses on the optical disk;
- wherein the optical disk controlling unit judges, in a seek operation moving the first optical pickup to a target address, whether to move the second optical pickup to the target address at the same time with the first optical pickup based on a positional relation of the target address to said first region or a difference between the first and the second regions corresponding to the positions of the first optical pickup and the second optical pickup, respectively.
2 more elements
A data recording method for recording data on an optical disk, said method comprising the steps of:
- providing a first optical pickup and a second optical pickup for reading/writing data on the optical disk;
- providing a motor for rotating the optical disk, said motor operating in at least (i) a first region of the optical disk at a first velocity and (ii) a second region of the optical disk at a second velocity;
- managing addresses on the optical disk by utilizing an optical disk controlling unit;
- and
- controlling the first optical pickup and the second optical pickup so that the optical pickups are positioned at desired addresses on the optical disk by utilizing the optical disk controlling unit;
- wherein the optical disk controlling unit judges, in a seek operation moving the first optical pickup to a target address, whether to move the second optical pickup to the target address at the same time with the first optical pickup based on a positional relation of the target address to said first region or a difference between the first and the second regions corresponding to the positions of the first optical pickup and the second optical pickup, respectively.
3 more elements
Dependencies are inferred from the claim text.