Optical Disc Writer and Method of Writing Label onto Optical Disc

Abstract

An optical disc writer includes an optical pickup head and a supporting portion for supporting an optical disc having a central hole, an annular label zone and an annular control feature zone located therebetween. The optical pickup head includes a red light source, a blue light source, a red lens and a blue lens. The red light source emits a red laser beam penetrating through the red lens to write a label onto the annular label zone. The blue light source emits a blue laser beam penetrating through the blue lens, which is disposed between the central hole and the red lens, and travelling to the annular control feature zone. Thus, the optical pickup head reads information of the annular control feature zone and the red lens is moved to the annular label zone according to the information in order to write the label onto the corresponding annular label zone.

1 . An optical disc writer, comprising:
 a supporting portion for supporting an optical disc having a central hole, an annular control feature zone and an annular label zone, the annular control feature zone being located between the central hole and the annular label zone; and   an optical pickup head, comprising:
 a red light source for emitting a red laser beam; 
 a blue light source for emitting a blue laser beam; 
 a red lens, wherein the red laser beam penetrates through the red lens to write a label onto the annular label zone; and 
 a blue lens disposed between the central hole and the red lens; 
 wherein the blue laser beam penetrates through the blue lens and travels to the annular control feature zone such that the optical pickup head reads information of the annular control feature zone and thus calibrates a position of the red lens in order to write the label onto the corresponding annular label zone. 
   
   
   
       2 . The optical disc writer according to  claim 1 , wherein the annular control feature zone has an outer ring zone, the outer ring zone has an index mark, and the blue laser beam penetrates through the blue lens and travels to the index mark such that the optical pickup head obtains a starting position of the outer ring zone. 
   
   
       3 . The optical disc writer according to  claim 2 , wherein the outer ring zone has a media identification (Media ID) zone, and the blue laser beam penetrates through the blue lens and travels to the media ID zone such that the optical pickup head obtains required information of the optical disc after the optical pickup head obtains the starting position of the outer ring zone. 
   
   
       4 . The optical disc writer according to  claim 3 , wherein the outer ring zone has a saw-tooth calibration zone, the blue laser beam penetrates through the blue lens and travels to the saw-tooth calibration zone to obtain calibration information after the optical pickup head reads the media ID zone, and the blue lens and the red lens are moved according to the calibration information such that the optical pickup head performs a calibration procedure. 
   
   
       5 . The optical disc writer according to  claim 1 , wherein the blue lens and the red lens are driven by one coil. 
   
   
       6 . A method of writing a label onto an optical disc, the method comprising the steps of:
 (a) providing an optical disc, which has a central hole, an annular label zone and an annular control feature zone located between the central hole and the annular label zone;   (b) providing a blue laser beam penetrating through a blue lens and travelling to the annular control feature zone to read information of the annular control feature zone; and   (c) providing a red laser beam penetrating through a red lens to write the label onto the annular label zone, wherein the red lens is moved in the annular label zone according to the information of the control feature zone in order to write the label.   
   
   
       7 . The method according to  claim 6 , wherein the annular control feature zone has an outer ring zone having an index mark, and the step (b) comprises:
 (b1) providing the blue laser beam penetrating through the blue lens and travelling to the index mark to obtain a starting position of the outer ring zone.   
   
   
       8 . The method according to  claim 7 , wherein the step (b) further comprises:
 (b2) providing the blue laser beam penetrating through the blue lens and travelling to a media ID zone of the outer ring zone after obtaining the starting position of the outer ring zone in order to obtain information of the optical disc.   
   
   
       9 . The method according to  claim 8 , wherein the step (b) further comprises:
 (b3) providing the blue laser beam penetrating through the blue lens and travelling to a saw-tooth calibration zone of the outer ring zone to perform a calibration procedure after obtaining the information of the optical disc.   
   
   
       10 . The method according to  claim 6 , wherein the blue lens and the red lens are driven by one coil.