Optical recording medium driving apparatus, high frequency superposition method, and program

A technology of an optical recording medium and a driving device, which is applied in the direction of optical recording/reproduction/erasing methods, optical recording heads, recording/reproduction with optical methods, etc., and can solve the problems of difficult accurate measurement, deterioration of data reproducibility, and radiation noise problems such as increase

CN102831899AInactive Publication Date: 2012-12-19SONY CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-12-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

An optical recording medium driving apparatus includes: a driving signal generating unit that generates a driving signal for driving a laser beam source; a high frequency superposition unit that performs high frequency superposition on the driving signal; a light receiving unit that receives an optical feedback of a laser beam; an evaluation signal generating unit that generates an evaluation signal from a light reception signal; a storage unit that stores first high frequency superposition amount information corresponding to a high frequency superposition amount for a normal reproduction mode and second high frequency superposition amount information corresponding to an amount that is greater than that represented by the first high frequency superposition amount information; and a superposition amount control unit that performs control so that a high frequency superposition amount based on the second high frequency superposition amount information is set when measuring an evaluation index based on the evaluation signal.
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Description

technical field

[0001] The present technology relates to an optical recording medium drive device having the capability of high-frequency superimposition of laser drive currents, such as an optical recording medium drive device configured to reproduce at least from an optical recording medium, and a high-frequency superimposition method thereof. The present technology also relates to a program to be executed by the above-described optical recording medium drive apparatus. Background technique

[0002] Optical disc recording media (hereinafter also referred to as “optical discs”) including, for example, compact discs (CDs), digital versatile discs (DVDs), and Blu-ray (BD, registered trademark) discs are widely used.

[0003] When the laser is driven to emit light at a power level as low as the read power level, some optical recording medium drive apparatuses configured to record and reproduce optical discs as listed above perform high-frequency superposition of the laser driv...

Examples

no. 1 example

[0033] 1-1. Exemplary structure of optical recording medium drive device

[0034] 1-2. High frequency superposition technique according to the first embodiment

[0035] 1-3. Processing sequence

[0036] 2. Second Embodiment

[0037] 3. Modify the example

[0038] 1. First Embodiment

[0039] 1-1. Exemplary structure of optical recording medium drive device

[0040] figure 1 The internal structure of an optical recording medium drive apparatus (hereinafter referred to as “optical disc apparatus 1 ”) as the first embodiment of the present technology is illustrated.

[0041] First, the optical disc D in the drawing is a disc-shaped optical recording medium (optical disc recording medium). As used herein, the term "optical recording medium" refers to a recording medium on which at least one of recording and reproduction of information is performed by light irradiation.

[0042] When loaded into the optical disc device 1, the optical disc D is rotatably driven in a predeterm...