Patent
Optical disk recording apparatus and optical recording method
| العنوان: | Optical disk recording apparatus and optical recording method |
|---|---|
| Patent Number: | 7,813,240 |
| تاريخ النشر: | October 12, 2010 |
| Appl. No: | 11/565722 |
| Application Filed: | December 01, 2006 |
| مستخلص: | An optical disk recording apparatus having (1) an optical pickup that emits laser light to illuminate a recording surface of an optical disk, receives reflected light resulting from the laser light reflected off the recording surface, and generates a light reception signal based on the thus received reflected light; (2) a laser power controller that sets a laser power setting and controls the power of the laser light emitted from the optical pickup based on the thus set laser power setting; and (3) a signal generator that, when a plurality of trial write areas provided on the recording surface of the optical disk are successively illuminated with the laser light in order to write trial write data, generates a timing notification signal that sets laser arrival timing when the laser light sequentially reaches trial write start positions of the plurality of trial write areas based on the light reception signal generated by the optical pickup. |
| Inventors: | Morimoto, Tadatsugu (Kanagawa, JP); Fujimoto, Takashi (Chiba, JP); Hayashida, Yoshie (Kagoshima, JP); Fukuda, Rumi (Kagoshima, JP); Kura, Jumpei (Kanagawa, JP); Yuwaki, Takeshi (Kagoshima, JP) |
| Assignees: | Sony Corporation (Tokyo, JP) |
| Claim: | 1. An optical disk recording apparatus comprising: an optical pickup that emits laser light to illuminate a recording surface of an optical disk, receives reflected light resulting from the laser light reflected off the recording surface, and generates a light reception signal based on the thus received reflected light; a laser power controller that sets a laser power setting and controls the power of the laser light emitted from the optical pickup based on the thus set laser power setting; a signal generator that, when a plurality of trial write areas provided on the recording surface of the optical disk are successively illuminated with the laser light in order to write trial write data, generates a timing notification signal that sets laser arrival timing when the laser light sequentially reaches trial write start positions of the plurality of trial write areas based on the light reception signal generated by the optical pickup; a power setting sender that, whenever the laser arrival timing is set by the timing notification signal provided from the signal generator, sends the laser power setting to the laser power controller, the laser power setting used to write the trial write data to the trial write area at the trial write start position to which the laser light will move from its current trial write start position where the laser light reached at the notified laser arrival timing; and a correction value sender that, whenever the laser arrival timing is set by the timing notification signal provided from the signal generator, sends an offset correction value to the servo signal generator, the offset correction value used to write the trial write data to the trial write area at the trial write start position to which the laser light will move from its current trial write start position where the laser light reached at the set laser arrival timing, wherein, when the laser arrival timing is set by the timing notification signal provided from the signal generator, the laser power controller switches and sets the laser power setting held in the laser power controller itself, and controls the power of the laser light emitted from the optical pickup based on the thus set laser power setting, whenever the laser arrival timing is notified by the timing set signal provided from the signal generator, the laser power controller holds the laser power setting provided from the power setting sender, sets the laser power setting that was provided from the power setting sender when the last laser arrival timing was set and held in the laser power controller, and controls the power of the laser light emitted from the optical pickup based on the thus set laser power setting, and whenever the laser arrival timing is set by the timing notification signal provided from the signal generator, the servo signal generator holds the offset correction value provided from the correction value sender, sets the offset correction value that was provided from the correction value sender when the last laser arrival timing was set and held in the servo signal generator, and generates the offset-free servo signal based on the thus set offset correction value and the light reception signal generated by the optical pickup. |
| Claim: | 2. The optical disk recording apparatus according to claim 1 , further comprising a servo signal generator that, when the plurality of trial write areas provided on the recording surface of the optical disk are successively illuminated with the laser light in order to write the trial write data, sets an offset correction value for removing an offset according to an error signal contained in the light reception signal generated by the optical pickup and generates an offset-free servo signal based on the thus set offset correction value and the light reception signal generated by the optical pickup, wherein, when the laser arrival timing is notified by the timing notification signal provided from the signal generator, the servo signal generator generates switches and sets the offset correction value held in the servo signal generator itself, and generates the offset-free servo signal based on the thus set the offset correction value and the light reception signal generated by the optical pickup. |
| Claim: | 3. An optical recording method comprising the steps of: using an optical pickup to emit laser light to illuminate a recording surface of an optical disk, receive reflected light resulting from the laser light reflected off the recording surface, and generate a light reception signal based on the thus received reflected light; when a plurality of trial write areas provided on the recording surface of the optical disk are successively illuminated with the laser light in order to write trial write data, generating a timing notification signal that sets laser arrival timing when the laser light sequentially reaches trial write start positions of the plurality of trial write areas based on the light reception signal generated by the optical pickup; when the laser arrival timing is set by the timing notification signal, switching and setting a laser power setting, and controlling the power of the laser light emitted from the optical pickup based on the thus set laser power setting; whenever the laser arrival timing is set by the timing notification signal provided from the signal generator, sending the laser power setting from a power setting sender to the laser power controller, the laser power setting used to write the trial write data to the trial write area at the trial write start position to which the laser light will move from its current trial write start position where the laser light reached at the notified laser arrival timing; whenever the laser arrival timing is set by the timing notification signal provided from the signal generator, sending an offset correction value from a correction value sender to the servo signal generator, the offset correction value used to write the trial write data to the trial write area at the trial write start position to which the laser light will move from its current trial write start position where the laser light reached at the set laser arrival timing, whenever the laser arrival timing is notified by the timing set signal provided from the signal generator, using the laser power controller to hold the laser power setting provided from the power setting sender, set the laser power setting that was provided from the power setting sender when the last laser arrival timing was set and held in the laser power controller, and control the power of the laser light emitted from the optical pickup based on the thus set laser power setting; and whenever the laser arrival timing is set by the timing notification signal provided from the signal generator, using the servo signal generator to hold the offset correction value provided from the correction value sender, set the offset correction value that was provided from the correction value sender when the last laser arrival timing was set and held in the servo signal generator, and generate the offset-free servo signal based on the thus set offset correction value and the light reception signal generated by the optical pickup. |
| Current U.S. Class: | 369/4/753 |
| Patent References Cited: | 2001/0038586 November 2001 Gushima et al. 2002/0186633 December 2002 Kai et al. 2005/0036415 February 2005 Yoshida et al. 2006/0245336 November 2006 Yokoi et al. 2000-339737 December 2000 2002-237046 August 2002 2003-077149 March 2003 2004-213808 July 2004 2004-246934 September 2004 2005-063476 March 2006 |
| Assistant Examiner: | Lee, Nicholas |
| Primary Examiner: | Feild, Joseph H |
| Attorney, Agent or Firm: | Sonnenschein Nath & Rosenthal LLP |
| رقم الانضمام: | edspgr.07813240 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |