Multi-directional control method and apparatus for laser power of CD-ROM

Abstract

The invention discloses a CD-ROM laser power multidirectional control method and device. Wherein, providing a conic curve as relation figure between constant line speed value and optical read-write head laser power to control the latter. This invention can avoid burn failure of DVD disc with narrow track width compared with VCD disc.

Description

technical field [0001] The invention relates to a multi-directional laser power control method and device for an optical drive, in particular to a multi-directional laser power control method and device for an optical drive using a quadratic CLV value-laser power diagram. Background technique [0002] Currently, optical disc drives can be divided into two types: Constant Linear Velocity Mode (hereinafter referred to as CLV Mode) and constant angular velocity mode (Constant Angular Velocity Mode, hereinafter referred to as CAV Mode). [0003] The so-called CLV mode is to control the optical pickup head to maintain a constant rate of reading data on the optical disk no matter in the inner circle or the outer circle of the optical disk when the optical pickup head is reading the rotating disk. Therefore, in the case of the CLV mode, the spindle motor (spindle) used to rotate the optical disc must be allocated with different rotational speeds for the optical pick-up head to read...

AI Technical Summary

Problems solved by technology

Therefore, if using figure 2 When the conventional CLV value and the laser power of the optical read-write head are used as the control of the laser power output of the optical read-write head by the DVD burner, the factors that reflect the track width of the optical disc cannot be taken into account, resulting in the DVD disc being burned When recording, it is easy to destroy the track of the DVD disc, resulting in burning failure

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