Acer Peripherals, Inc.

Acer Communications and Multimedia Inc.

Cheng-Chieh Ku

Meng-Shin Yen

Wai William Wang

The present invention relates to a device and a method of temperature control for an optical storage and retrieving apparatus. When the internal temperature of the optical storage and retrieving apparatus reaches a predetermined temperature, the temperature control device is able to bid the optical storage and retrieving apparatus steadily retrieve data by lowering the rate of a carry device of the optical storage and retrieving apparatus, or by instructing a servo control device to lower the tracking loop gain, or by lowering the velocity and the braking slope of a data read/write device of the optical storage and retrieving apparatus. The temperature control device includes a sensing device capable of detecting the present temperature of the optical storage and retrieving apparatus so as to generate a first voltage signal; a reference device operatively connected to the sensing device whereby the value of a predetermined temperature is modified and a second voltage signal is generated; a comparison device operatively connected to the sensing device and the reference device respectively whereby a first voltage signal and a second voltage signal is received and thus a compare signal is output. When the CPU receive the compare signal, if the compare signal is greater than a predetermined value, the CPU generate a first control signal to the driving device to bid the driving device lower the rate of the carry device. The CPU is also able to generate a second control signal to the servo control device to bid the servo control device lower the tracking loop gain or lower the velocity and the braking slope of a data read/write device of the optical storage and retrieving apparatus.

Device and method of temperature control for optical storage and retrieving apparatus

The present invention relates to a method for adjusting the rotating speed of a compact disc drive to prevent unwanted vibrations of a compact disc rotating within. The compact disc drive comprises a reading head for reading data stored in a track of the compact disc and generating a data signal and a track signal; a rotating driver for driving the compact disc; a speed control circuit for controlling the rotating speed of the rotating driver; a track driver for moving the reading head along a diameter of the compact disc; a track driving circuit for controlling the track driver; and a track servo circuit for controlling the track driving circuit according to the track signal generated by the reading head and a track correction gain so that the track driver can move the reading head along the diameter of the compact disc along its track. The speed adjustment method comprises the following steps:

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Taitung, Taiwan

Cheng-Chieh Ku