Hybrid disk and method of writing data to and/or reading data from the hybrid disk
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-min Cheong, Jung-wan Ko, Jin-kyung Lee
Life of this patent
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Abstract
A hybrid disk useable with a recording and or reproducible apparatus having an optical pickup. The hybrid disk includes a first recording layer having a first format on which data is recordable or readable by a first format beam and a second recording layer having a second format on which the data is recordable or readable by a second format beam. The transmivities and reflectivities of the first and second recording layers are interrelated to control relative intensities of the first and second format beams incident on the optical pickup.
Claims26
A hybrid disk having a plurality of recording layers that are different in format from each other, comprising:
- a first recording layer to and/or from which data is written or read by a first format beam;
- and
- a second recording layer to and/or from which data is written or read by a second format beam,
- wherein a reflectivity of the second recording layer with respect to the first format beam is less than a reflectivity of the first recording layer with respect to the first format beam.
An apparatus for writing data to and/or reading data from a hybrid disk having a plurality of recording layers that are different in format from each other, the apparatus comprising:
- a writing/reading unit writing the data to and/or reading the data from a first recording layer using a first format beam and/or writing the data to and/or reading the data from a second recording layer using a second format beam;
- and
- a control unit controlling the writing/reading unit to write or read the data to or from the hybrid disk based on a reflectivity of the second recording layer with respect to the first format beam so that an amount of the first format beam received by the writing/reading unit from the second recording layer is less than a predetermined level when writing the data to and/or reading the data from the first recording layer using the first format beam.
A method of writing data to and/or reading data from a hybrid disk having a plurality of recording layers that are different in format from each other, the method comprising:
- writing or reading the data to or from a first recording layer of the hybrid disk using a first format beam;
- writing or reading the data to or from a second recording layer of the hybrid disk using a second format beam,
- controlling the first format beam based on a reflectivity of the second recording layer with respect to the first format beam so that an amount of the first format beam reflected from the second recording layer is less than a predetermined level when writing or reading the data to or from the first recording layer using the first format beam.
A hybrid disk useable with a recording and or reproducible apparatus having an optical pickup, the hybrid disk comprising:
- a first recording layer having a first format on which data is recordable or readable by a first format beam;
- and
- a second recording layer having a second format on which the data is recordable or readable by a second format beam;
- wherein a transmissivity of the first recording layer and a reflectivity of the second recording layer are interrelated to control relative intensities of the first and second format beams incident on the optical pickup.
Dependencies are inferred from the claim text.