Systems and methods for storing data on an optical disk

• US 7,125,644 B2
• Filed: 08/11/2003
• Issued: 10/24/2006
• Est. Priority Date: 08/11/2003
• Status: Expired due to Fees

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Van Brocklin, Andrew L., Dorsh, Cari, Gore, Makarand P.
• Primary Examiner(s): Angebranndt, Martin
• Application Number:
  US10/639,183
• Publication Number:
  US 20050037285A1
• Time in Patent Office: 1,170 Days
• Field of Search: 430/270.21, 430/270.11, 430/945, 430/270.16, 428/64.1, 369/288
• US Class Current: 430/270.14
• CPC Class Codes: G11B 23/0021 discs
• CPC Class Codes: G11B 23/42 Marks for indexing, speed-controlling, synchronising, or timing
• CPC Class Codes: G11B 7/0037 with discs
• CPC Class Codes: G11B 7/00736 Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082
• CPC Class Codes: Y10S 430/146 Laser beam
• CPC Class Codes: Y10T 428/21 Circular sheet or circular blank

Abstract

Optical disks include machine readable data that is written with dye that is invisible to the naked eye and a laser-imagable coating that forms marks that are visible to the naked eye.

Claims

1. An optical disk comprising:

a portion suitable for laser-writing human-visible data; and

screen printed machine-readable control data written with a dye that is invisible to the naked eye;

wherein said laser-writable portion and said control data are on the same side of the optical disk.

2. The optical disk of claim 1 wherein the control data is written on a rim of the optical disk.

3. The optical disk of claim 1 wherein the control data is not printed on the portion suitable for writing visible data.

4. The optical disk of claim 1 wherein the control data is printed on the portion suitable for writing visible data.

5. The optical disk of claim 1 wherein the dye is selected from the group consisting of the following compounds:

6. A method for writing data onto an optical disk, the method comprising:

writing using screen printing machine-readable control data onto p first side of an optical disk with a dye that is not visible to an unaided human eye, and

using a laser to write human-visible data in a markable laver on said first side of the disk.

7. The method of claim 6 wherein the control data is written on a rim of the optical disk.

8. The method of claim 6 wherein the control data is printed not the markable layer.

9. The method of claim 6 wherein the control data is printed on the markable layer.

10. The method of claim 6 wherein the dye is selected from the group consisting of the following compounds:

11. A means for storing data on an optical disk, the means comprising:

means for providing screen printed machine-readable control data on a first side of optical disk, wherein the control data comprises a dye that is invisible to the naked eye; and

means for laser-writing human-visible data on the first side of the disk.

12. The means of claim 11 wherein the invisible dye is affixed on a rim of the optical disk.

13. The means of claim 11 wherein the invisible dye is not affixed on the means for writing visible data.

14. The means of claim 11 wherein the invisible dye is affixed on the means for writing visible data.

15. The means of claim 11 wherein the invisible dye is selected from the group consisting of the following compounds: