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AssigneeToshiba Samsung Storage Technology Korea Corporation
InventorsHong-kuk Kim, Jong-hwa Yu
Estimating the term…
An optical information storage medium system is provided. The optical information storage medium system includes an optical pickup, which comprises a photo-detector configured to control light power detected by receiving a portion of light emitted from a light source and obtains an output signal proportional to output light power of the light source from a signal detected by the photo-detector, and a signal processor configured to signal-process the output signal input from the optical pickup. The signal processor includes a sensitivity acquisition unit configured to acquire a sensitivity value of the photo-detector, a gain calculator configured to calculate a target gain value to be used in comparing the sensitivity value of the photo-detector, which is acquired by the sensitivity acquisition unit, with a target sensitivity value to be used by the optical information storage medium system, and a gain adjustment unit.
An optical information storage medium system comprising:
An optical information storage medium system comprising:
A method of generating a signal for controlling light power, the method comprising:
Dependencies are inferred from the claim text.
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Circuits, methods or arrangements for laser control or stabilisation: power control during transducing, e.g. by monitoring
Information storage based on relative movement between record carrier and transducer
About 5 years 7 months of term left · ends 2 Jun 2032 (estimated)
This application claims the benefit under 35 U.S.C. §119(a) of Korean Patent Application No. 10-2010-0109278, filed on Nov. 4, 2010, in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference for all purposes.
1. Field of the Invention
The following disclosure relates to an optical information storage medium system and a method of generating a signal for controlling light power.
FIG. 1 is a diagram illustrating an example of an optical information storage medium system and a method of generating a signal for controlling light power;
FIG. 2 is a diagram illustrating another example of an optical information storage medium system and a method of generating a signal for controlling light power;
FIG. 3 is a diagram illustrating yet another example of an optical information storage medium system and a method of generating a signal for controlling light power; and
Throughout the drawings and the detailed description, unless otherwise described, the same drawing reference numerals will be understood to refer to the same elements, features, and structures. The relative size and depiction of these elements may be exaggerated for clarity, illustration, and convenience.
The following detailed description is provided to assist the reader in gaining a comprehensive understanding of the methods, apparatuses, and/or systems described herein. Accordingly, various changes, modifications, and equivalents of the systems, apparatuses and/or methods described herein will be suggested to those of ordinary skill in the art. Also, descriptions of well-known functions and constructions may be omitted for increased clarity and conciseness.
According to an optical information storage medium system and a method of generating a signal for controlling light power, a sensitivity adjustment function of a photo-detector for controlling light power, which is performed by an optical pickup, is performed by a signal processor such as a Digital Signal Processor (DSP). The signal processor may include a sensitivity acquisition unit for acquiring sensitivity information from information input from the optical pickup, a target sensitivity setup unit for setting target sensitivity to be used by the optical information storage medium system, a gain calculator for calculating a gain based on a comparison of the sensitivity information and the target sensitivity, and a gain adjustment unit for amplifying a signal output by the photo-detector based on the calculated gain to control light power. The light power is input from the optical pickup.