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Optical disc drive and method of controlling same

A kind of optical disc drive, laser technology, applied in the direction of optical recording/reproduction, instrument, beam source, etc., can solve the deterioration of recording sensitivity, it is difficult to control the recording/reproduction power stably, and it is difficult to maintain the laser diode output constantly and other problems to achieve the effect of reducing impact and stabilizing detection

Inactive Publication Date: 2009-10-28
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

[0004] In a conventional optical disc drive, since both the light generation efficiency of the laser diode and the detection efficiency of the photodiode are changed if the temperature rises, it is difficult to maintain the output of the laser diode constantly
[0005] Specifically, when recording / reproducing data at high speed, the deterioration of recording sensitivity is further increased due to changes in the characteristics of the laser diode due to changes in temperature, so it is difficult to stably control the recording / reproducing power

Method used

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  • Optical disc drive and method of controlling same
  • Optical disc drive and method of controlling same
  • Optical disc drive and method of controlling same

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Embodiment Construction

[0034] Reference will now be made in detail to embodiments of the present general inventive concept, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present general inventive concept by referring to the figures.

[0035] In the following, reference will be made to Figure 1-5 Exemplary embodiments of the present general inventive concept will be described.

[0036] figure 1 is a block diagram illustrating an optical disc drive according to an embodiment of the present general inventive concept. exist figure 1 In , reference numeral 102 denotes an optical disk drive. Buffer 122 , Advanced Technology Attachment Packet Interface (ATAPI) 124 and MPEG codec 126 are components of other devices (eg, Blu-ray Disc (BD) players, computers, etc.) connected to optical disc drive 102 . Buffer 122, ATAPI 124, and MPEG codec 126 may be incorporat...

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Abstract

An optical disc drive, which is capable of stably controlling a laser diode without having an influence on other data by recording a test pattern in at least one of a run-in area and a run-out area of a recording unit block and detecting the characteristics of the laser diode, and a method of controlling the same. The method of controlling an optical disc drive can include recording a test pattern in at least one of a header and a tail of a recording unit block including a data area having a predetermined size, detecting input / output characteristics of a laser diode via the recorded test pattern, and controlling the laser diode such that the laser diode generates a target output on the basis of the detected input / output characteristics.

Description

technical field [0001] The present general inventive concept relates to an automatic power control (APC) loop control technology, and more particularly, to an optical disc drive capable of minimizing an optical power error due to temperature variation and a control method thereof. Background technique [0002] An optical disc drive includes an APC circuit that constantly maintains recording optical power and reproducing optical power. The APC circuit of this optical disc drive detects the amount of light output from the laser diode during data recording / reproduction, and controls the level of the drive current of the laser diode based on the detection result so that the recording power or reproduction of the laser beam output from the laser diode Power has a target level. [0003] The characteristics of a laser diode driven by current will deteriorate as the temperature rises. Thus, laser light generation efficiency will deteriorate. To solve this problem, an APC algorith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/125G11B7/007
CPCG11B7/1267G11B7/00736G11B7/1263G11B7/0062G11B7/126
Inventor 耶米亚连诺·瓦莱里
Owner SAMSUNG ELECTRONICS CO LTD
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