Disc drive apparatus

A disc drive apparatus capable of loading and ejecting the discs those are:

• a first disc which has a light shielding effect;
• a second disc whose outside diameter is smaller than the that of the first disc and which has a light shielding effect;
• a third disc whose outside diameter is almost same as the first disc and which has a light shielding effect and a hollow hole whose outside diameter is almost same as the second disc in central;
• and a fourth disc whose outside diameter is almost same as the first disc, which has a small data area whose diameter is almost same as the second disc in central and has a light shielding effect, and whose rest area except the small data area is transparent;
• said apparatus comprising:
• a disc inserting and discharging portion;
• a first detector for detecting a disc passing through one end of the disc inserting and discharging portion by contacting with the disc;
• a second detector for detecting the disc passing by the light shielding of the disc;
• and
• a disc identifier for identifying type of the disc based on a detected result by the second detector when the first detector detects the disc,
• wherein said second detector is arranged on a position where said second detector is capable of detecting the fourth disc when the first disc detects the fourth disc, and where said second detector does not detect the third disc when the first detector detects the third disc.