Unit for controlling writing power inside optical recording device, and control method

A power control and in-device technology, which is applied to a write power control device in an optical recording device and its control field, can solve the problems of inconvenient operation and increased burden on a microcomputer, and achieve the effect of reducing the burden and improving the writing quality.

Inactive Publication Date: 2007-02-21
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In the prior art, there is a problem that when recording data in DVD+R / -R, in order to perform temperature compensation of the VWDC2 track, the microcomputer for system control needs to periodically monitor the voltage of the temperature-compensated VRDC track after the start of recording Whether to increase, if the VRDC voltage increases until the end of the compensation behavior, it is necessary to increase the set value of DAC_VWDC2107 according to the increased voltage, which is very inconvenient to operate
[0018] Moreover, when recording, there is a problem that the burden on the microcomputer is increased due to the above-mentioned temperature compensation.

Method used

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  • Unit for controlling writing power inside optical recording device, and control method
  • Unit for controlling writing power inside optical recording device, and control method
  • Unit for controlling writing power inside optical recording device, and control method

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Embodiment Construction

[0040] Embodiments of the writing power control device in the optical recording device and the control method thereof according to the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Figure 4 is a block diagram of a writing power control device in an optical recording device according to an embodiment of the present invention.

[0042] In this embodiment, the write power control device in the optical recording device is composed of VRDC, VWDC, and VWDC2 tracks.

[0043] This embodiment schematically shows a system for controlling the VWDC2 track voltage by setting the initial value and then without the control of the microcomputer.

[0044] from Figure 4 We can see that the VRDC and VWDC tracks are the same as the existing ones. From the perspective of the VWDC2 track, an important component of the present invention, it consists of the following parts: before the recording starts, set the reference power of the VWDC...

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PUM

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Abstract

A control device of write-in power in optical recording unit consists of automatic laser-power regulation circuit used by DAC-VRDC and VRDC; VRDC magnetic track formed by VRDC horizontal sampling holder; VWDC magnetic track formed by automatic laser power regulation circuit used on VWDC and VWDC horizontal sampling holder; VWDC2 magnetic track being used to output voltage as per set value of DAC-VWDC2 and being formed by DAC VWDC2, DAC REF, amplifier and adder.

Description

technical field [0001] The present invention relates to a writing power control device in an optical recording device and a control method thereof, in particular to a writing power control device in an optical recording device that compensates for the write quality degradation phenomenon according to the temperature characteristic change of an optical pickup for long-time recording. Invention of the input power control device and its control method. Background technique [0002] In an optical recording device, in order to record data on rewritable optical discs such as CD-R, CD-RW, DVD+R, DVD-R, DVD+RW, DVD-RW, and DVD-RAM, it is necessary to have Automatic laser power adjustment (Automatic Laser Power Control: 'ALPC') circuit of laser power. [0003] figure 1 It is a block diagram of a power control device using an existing automatic laser power adjustment circuit. [0004] In general optical recording recording tracks, there are three tracks called VRDC, VWDC, and VWDC2...

Claims

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Application Information

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IPC IPC(8): G11B7/004G11B7/125G11B7/00G11B7/1263
Inventor 朴性俊
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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