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Laser power controlling method for recording data and related apparatus

A laser power and control device technology, which is applied in the direction of optical recording/reproduction, data recording, optical recording head, etc., can solve the problem that the optimal power cannot be adjusted correctly

Inactive Publication Date: 2006-11-15
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Running the optimal power control program also cannot correctly adjust the optimal power

Method used

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  • Laser power controlling method for recording data and related apparatus
  • Laser power controlling method for recording data and related apparatus
  • Laser power controlling method for recording data and related apparatus

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0042] see figure 2, which is a flowchart of a method for controlling laser power according to an embodiment of the present invention. The method for controlling laser power is applied to an optical disc recorder to control a laser diode of the optical disc recorder, for example, a DVD recorder. The method for controlling laser power comprises the following steps:

[0043] Step 100: the step starts;

[0044] Step 102: implementing the improved optimized power control procedure;

[0045] Step 104: Determine the initial write power of a laser diode according to the result of executing the optimized power control program;

[0046] Step 106: If the laser diode starts to burn non-test data on an optical disc (i.e. actual data), execute step 108; otherwise, execute step 106 again;

[0047] Step 108: If the programming is completed, execute step 122; otherwise, execute step 110;

[0048] Step 110: If a measured asymmetrical interruption occurs, execute step 112; otherwise, exec...

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PUM

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Abstract

A laser power controlling method for controlling power outputted from a laser to record data onto an optical disc and a related apparatus are disclosed. The laser power controlling method includes writing data onto the optical disc according to a characteristic of a write power of the laser, halting writing the data at a stopping point, evaluating the data recorded on the optical disc for generating a first evaluating result, adjusting the characteristic of the write power according to the first evaluating result, and utilizing the laser to restart writing data onto the optical disc from a starting point according to an adjusted characteristic of the write power, wherein there is a gap between the starting point and the stopping point.

Description

technical field [0001] The invention discloses a method of controlling laser power and its related device, especially a method of controlling laser power and its related device which can stop recording data to adjust the laser power and restart recording data. Background technique [0002] A prior art optical disc recorder has a head that emits a laser beam to heat the recording layer of an optical disc to store data in digital format. According to the known optical disc specification, a pit on the optical disc is defined to represent 0, and a land on the optical disc is defined to represent 1. Unfortunately, since different recording layers have different properties, different optical discs also have different energy absorption characteristics. For example, when the same laser beam (ie, the same laser power) irradiates rewritable digital video discs (DVD-R) manufactured by different manufacturers, different degrees of etching will occur. As a result, when an optical disc ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/125
CPCG11B7/1263
Inventor 张光荣马保平
Owner MEDIATEK INC