Lite-on It Corporation

Chen-Jung Hsu

Yi-Chung Lee

A magnetism test method for a tray-type optical drive is disclosed. A preliminary input voltage is provided to a DC motor of the tray-type optical drive for performing a preliminary ejection on a tray and a magnetic clamper of the tray-type optical drive. Then, a test voltage smaller than the preliminary input voltage is provided to the DC motor to partially eject the tray, in which the tray is ejected to a point short of the complete distance of ejection. When the incomplete distance is longer than a predetermined distance, the magnetic force of the magnetic clamper is determined to abnormal.

Clamper magnetism test method for a tray-type optical drive

The present invention discloses a tray-out control method for moving out a loading tray of an optical drive. A first forcing function is applied to the loading tray to overcome a lesser magnetic attraction when an optical disk is placed on the loading tray. A second forcing function is applied to the loading tray to overcome a greater magnetic attraction when the optical disk is not placed on the loading tray. A maximum value of the second forcing function is larger than a maximum value of the first forcing function.

Tray-out control method for moving out a loading tray of an optical drive

The present invention discloses a method of adjusting a rotation speed of an optical disc drive for a spindle motor controlled by a host to rotate and read an optical disc. First, it is determined whether the data read by the optical disc drive is in Mode 1 or Form 1 of Mode 2. If in Mode 1 or Form 1 of Mode 2, it is determined whether the frequency of read request commands output from the host is lower than a predetermined value or not. If the frequency of read request commands output from the host is lower than the predetermined value, then it is determined whether the response data output to the host is sequential reading data or not. If the three situations mentioned above are all sustained, the data read by the optical disc drive is ascertained as MP3 data. Thus, the rotation speed of the spindle motor is decreased to a lower value. If one of the three situations is not sustained, the optical disc drive rotates at its highest speed to enhance the quantity of data read between the optical disc drive and the host. Thus, the rotation speed of the optical disc drive is adjusted automatically in response to the data transmission rate.

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Taipei, Taiwan

Chen-Jung Hsu