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CD-ROM carrier rotation motor composite switch method

A hybrid, optical drive technology, applied in the direction of driving/moving the recording head, etc., can solve the problems of low motor power loss, long tracking time, short tracking time, etc., to reduce power loss, shorten tracking time, and improve data transmission rate effect

Inactive Publication Date: 2008-12-31
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] (1) In the purely CLV reading mode, the speeds of the inner and outer ring motors are different, which will cause high motor power loss and longer tracking time, and the data transmission rate will be too low due to the limited speed of the inner ring motor
[0007] (2) In the reading mode of CAV with fixed angular velocity, the motor speed is constant, so the motor power loss is low and the tracking time is short, but the data transmission rate is proportional to the disk radius, so the average data transmission rate will be affected The data transmission rate of the innermost ring is limited and slightly reduced

Method used

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  • CD-ROM carrier rotation motor composite switch method
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  • CD-ROM carrier rotation motor composite switch method

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Embodiment Construction

[0037] In order to further understand the technology, method and effect that the present invention adopts to achieve the intended purpose, please refer to the following detailed description and accompanying drawings of the present invention. It is believed that the purpose, special and characteristics of the present invention can be deeply and specifically understood from this It is understood that the accompanying drawings are only for reference and illustration, and are not intended to limit the present invention.

[0038] Regardless of whether the optical drive is reading or writing, the setting of the starting point speed of the disc is very important, because it will affect the size of the jitter error (jitter error), and then affect the quality of reading and writing the disc. But to have a good starting point speed sometimes can not take into account the most peripheral speed (generally this speed is the maximum speed), so here we propose a technology called "SPINDLE mix...

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Abstract

The invention relates to a CD-ROM drive rotating motor mixing switch method, which comprises: analyzing the locating statement of the current red disk, ascertaining a switching point according to the speed of CD-ROM drive, ascertaining the read-write mode of CD-ROM drive of the obtained switching point.

Description

technical field [0001] The invention relates to a hybrid switching method for a rotation motor of an optical drive carrier, in particular to a hybrid switching method for a rotation motor of an optical drive carrier by using a radio frequency signal fed back from an optical disc. Background technique [0002] The data tracks on the optical disc are distributed in a spiral-shaped track, and each unit of data is recorded on the optical disc at an equal distance from the inside to the outside, so the amount of data on the optical disc per revolution is proportional to the radius of the disc. Currently, according to the different control methods of the spindle motor, it can be divided into two reading modes: Constant Linear Velocity (CLV) and Constant Angular Velocity (CAV). [0003] In the traditional alignment speed control mode (CLV) mode, under a fixed transmission rate, its rotational speed will be inversely proportional to the radius, please refer to Figure 1A , Figure 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B21/02
Inventor 吴振堂吴维中
Owner MEDIATEK INC
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