Optical disc drive focusing apparatus

• US 7,379,083 B2
• Filed: 05/26/2006
• Issued: 05/27/2008
• Est. Priority Date: 09/12/2003
• Status: Expired due to Fees

• Current Assignee: Andrew L Van Brocklin, Daryl E. Anderson
• Original Assignee: Andrew L Van Brocklin, Daryl E. Anderson
• Inventors: Van Brocklin, Andrew L., Anderson, Daryl E.
• Primary Examiner(s): PHAM, HAI CHI
• Application Number:
  US11/441,489
• Publication Number:
  US 20060214956A1
• Time in Patent Office: 732 Days
• Field of Search: 369 4427- 4432, 369/47.5, 369/112.24, 369/44.25, 369/44.26, 347224-225, 360/114.03, 360/114.06
• US Class Current: 347/224
• CPC Class Codes: B41J 3/4071 Printing on disk-shaped media, e.g. CDs
• CPC Class Codes: G11B 5/5526 Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof G11B5/556 takes precedence
• CPC Class Codes: G11B 7/0037 with discs
• CPC Class Codes: G11B 7/0908 for focusing only G11B7/0925, G11B7/094, G11B7/0941, G11B7/0943, G11B7/0945, G11B7/0946, G11B7/0948 take precedence

Abstract

An optical focusing system is configured to generate a data profile, wherein the data profile is configured to provide signals for operation of an actuator. Application of the signals from the data profile results in focus of optics within a label region of an optical disc. An image is printed on the label region of the optical disc while the optics focus on the label region of the optical disc by applying signals to the actuator according to the data profile.

Claims

1. A method comprising:

generating a data profile adapted to provide signals to operate an actuator to focus an optical mechanism on an optically writable label region of an optical disc, the data profile generated based on a lag time between an actuator voltage and a position of the actuator, the actuator voltage being a voltage at which peaks result within one or more SUM signals output by one or more sensors; and

,

forming an image on the optically writable label region of the optical disc using the optical mechanism as has been focused by the actuator based upon the data profile generated.

2. The method of claim 1, wherein generating the data profile comprises configuring a look-up table with signal data associated with focusing on locations within the optically writable label region of the optical disc.

3. The method of claim 1, wherein generating the data profile comprises configuring a function to generate signal data, the function associating locations within the optically writable label region of the optical disc with appropriate signals.

4. The method of claim 1, wherein generating the data profile comprises:

applying an alternating current (AC) component of a signal of the actuator as the optical disc is rotated, the AC component causing the optical mechanism to pass through a focal point in both directions on each cycle of the AC component; and

,

recording a voltage within a voltage data look-up table that was applied to the actuator and that was associated with a SUM signal peak resulting from passage of the optical mechanism through the focal point.

5. The method of claim 1, further comprising calibrating the actuator in accordance with the data profile.

6. The method of claim 1, wherein generating the data profile comprises including data within the data profile associated with at least two radial distances from a center of the optical disc.

7. The method of claim 1, further comprising:

indexing the data profile in accordance with an angular orientation of the optical disc; and

,

retrieving data from the data profile in accordance with the angular orientation of the optical disc during image formation.

8. The method of claim 1, wherein forming the image on the optically writable label region comprises interpolating between data within the data profile.

9. A system comprising:

first logic to generate the data profile adapted to provide signals to operate an actuator to focus an optical mechanism on an optically writable label region of an optical disc; and

,

second logic to form an image on the optically writable label region of the optical disc using the optical mechanism as has been focused by the actuator based upon a data profile generated, the data profile generated based on a lag time between an actuator voltage and a position of the actuator, the actuator voltage being a voltage at which peaks result within one or more SUM signals output by one or more sensors.

10. The system of claim 9, wherein the first logic is to generate the data profile by configuring a look-up table with signal data associated with focusing on locations within the optically writable label region of the optical disc.

11. The system of claim 9, wherein the first logic is to generate the data profile by configuring a function to generate signal data, the function associating locations within the optically writable label region of the optical disc with appropriate signals.

12. The system of claim 9, wherein the first logic is to generate the data profile by:

applying an alternating current (AC) component of a signal of the actuator as the optical disc is rotated, the AC component causing the optical mechanism to pass through a focal point in both directions on each cycle of the AC component; and

,

recording a voltage within a voltage data look-up table that was applied to the actuator and that was associated with a SUM signal peak resulting from passage of the optical mechanism through the focal point.

13. The system of claim 9, wherein the second logic is to form the image on the optically writable label region by interpolating between data within the data profile.

14. An optical disc drive comprising:

an optical mechanism to form an image on an optically writable label region of an optical disc inserted into the optical disc drive;

an actuator to focus the optical mechanism on the optically writable label region of the optical disc in accordance with a data profile; and

,

a mechanism to generate the data profile adapted to provide signals to operate the actuator to focus the optical mechanism en in relation to the optically writable label region of the optical disc based up on the data profile, the data profile generated based on a lag time between an actuator voltage and a position of the actuator, the actuator voltage being a voltage at which peaks result within one or more SUM signals output by one or more sensors.

15. The optical disc drive of claim 14, wherein the mechanism is to generate the data profile by configuring a look-up table with signal data associated with focusing on locations within the optically writable label region of the optical disc.

16. The optical disc drive of claim 14, wherein the mechanism is to generate the data profile by configuring a function to generate signal data, the function associating locations within the optically writable label region of the optical disc with appropriate signals.

17. The optical disc drive of claim 14, wherein the mechanism is to generate the data profile by:

applying an alternating current (AC) component of a signal of the actuator as the optical disc is rotated, the AC component causing the optical mechanism to pass through a focal point in both directions on each cycle of the AC component; and

,

recording a voltage within a voltage data look-up table that was applied to the actuator and that was associated with a SUM signal peak resulting from passage of the optical mechanism through the focal point.

18. The optical disc drive of claim 14, wherein the mechanism is to generate the data profile by including data within the data profile associated with at least two radial distances from a center of the optical disc.

19. The optical disc drive of claim 14, wherein the mechanism is further to interpolate between data within the data profile.

20. The optical disc drive of claim 14, wherein the mechanism is further to calibrate the actuator in accordance with the data profile.

21. The optical disc drive of claim 14, wherein the mechanism is further to:

index the data profile in accordance with an angular orientation of the optical disc; and

,

retrieve data from the data profile in accordance with the angular orientation of the optical disc during image formation.