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Operating method and device for initializing optical device

A technology of optical system and optical pick-up head, which is applied in optical recording/reproduction, instrumentation, data recording, etc., and can solve problems affecting the performance of optical disc drives, poor radial error correction parameters, and operating parameters that are not optimal. or the correct value etc.

Inactive Publication Date: 2012-10-10
PHILIPS & LITE ON DIGITAL SOLUTIONS
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

In the case of low or no eccentricity, the radial error correction procedure may fail completely, or result in poor radial error correction parameters, even if poor radial error correction does not It will make the CD player unable to play, but the operating parameters obtained by insufficient number of cross-tracks are not the optimal value or correct value, and it will still affect the performance of the CD player

Method used

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  • Operating method and device for initializing optical device
  • Operating method and device for initializing optical device
  • Operating method and device for initializing optical device

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Embodiment Construction

[0026] Please refer to FIG. 2 to illustrate the results of the present invention applied to the radial error correction period. During the correction period, for example, a 1300Hz sine wave signal is used to actively drive the radial driver, which can generate cross-track at the eccentric turning point and reduce the time spent at the turning point. Figure 2b for Figure 2a A partial zoom-in view of , showing the front part during radial error correction, with Figure 1b In contrast, there is no eccentric turning point between the two tracks, so the system of the present invention can provide a more accurate radial error signal during this period.

[0027] Using most of the existing optical device (CD / DVD) chips, the oscillator of the automatic gain control (AGC) circuit can inject signals into the radial control loop when correcting the radial error, and it can be implemented this invention. Please refer to the image 3 , in the present invention, the focus controller mus...

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Abstract

The invention relates to operating method and device for initializing an optical device. The method comprises the steps of: generating an initial radial error signal by an optical read head unit; receiving the initial radial error signal by a radial error correction unit; generating a radial driver drive signal by the radial error correction unit; receiving a corrected radial error signal by a radial controller; generating a radial error correction result by the radial controller; and controlling a radial driver to promote rail crossing according to the radial driver drive signal and the radial error correction result.

Description

technical field [0001] The present application relates to the optimal operation of the optical device, especially related to obtaining better operating parameters during initialization, which is beneficial to the operation of the optical device, especially after the optical device enters normal operation, these operating parameters are conducive to the radial cycle Correction of track errors. Background technique [0002] Before starting to read the data of the optical storage medium, the optical disc machine first initializes the analog front end of the chip (CD / DVD chip). In this initialization step, multiple operating parameters are obtained in order to correct focus, radial tracking , RE), turntable motor control, and data retrieval, etc. [0003] One of the corrections is to adjust the radial tracking error (hereinafter referred to as the radial error), which is mainly used to keep the reading light spot focused on the data track when the optical disc is played normall...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/095
Inventor 马瑟·瑞克
Owner PHILIPS & LITE ON DIGITAL SOLUTIONS