Optical disc drive and disc determination method thereof

Abstract

An optical disc drive comprises a flash memory, an optical pick-up head, a spindle motor and a control unit. The control unit generates a determination result according to whether the optical disc drive has a disc loaded therein, and stores the determination result into the flash memory when the optical disc drive receives a power. The control unit reads the determination result from the flash memory after receiving the power again, and determines whether to control the optical pick-up head and the spindle motor to execute the disc detection procedure according to the determination result. If the determination result is negative, whether the optical disc drive has a disc loaded therein is determined according to a rotation speed of the spindle motor. If the rotation speed is larger than a threshold value, the control unit determines that no disc is loaded in the optical disc drive.

What is claimed is: 
     
         1 . An optical disc drive, comprising:
 a flash memory;   an optical pick-up head;   a spindle motor; and   a control unit,   wherein the control unit receives a power for executing a disc detection procedure to determine whether the optical disc drive has a disc loaded therein, generates a determination result, and stores the determination result to the flash memory,   wherein the control unit, after receiving the power again, reads the determination result from the flash memory and determines whether to control the optical pick-up head and the spindle motor to execute the disc detection procedure according to the determination result,   wherein the control unit determines whether the optical disc drive has the disc loaded therein according to a rotation speed of the spindle motor if the determination result is negative, and determines that no disc is loaded in the optical disc drive if the rotation speed is larger than a threshold value.   
     
     
         2 . The optical disc drive according to  claim 1 , wherein if the rotation speed is not larger than a threshold value, the control unit controls the optical pick-up head and the spindle motor to execute the disc detection procedure. 
     
     
         3 . The optical disc drive according to  claim 1 , wherein the control unit controls the optical pick-up head and the spindle motor to execute the disc detection procedure if the determination result is affirmative. 
     
     
         4 . The optical disc drive according to  claim 1 , wherein the control unit is a micro-controller. 
     
     
         5 . The optical disc drive according to  claim 1 , wherein the control unit is coupled to the flash memory, the optical pick-up head and the spindle motor.