Transient optical state change materials useful in copy-protected compact discs

• US 7,344,823 B2
• Filed: 09/26/2003
• Issued: 03/18/2008
• Est. Priority Date: 09/26/2002
• Status: Expired due to Fees

• Current Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Original Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Inventors: Li, Junzhong, Vig, Rakesh, Selinfreund, Richard H., Gerger, Scott
• Primary Examiner(s): ANGEBRANNDT, MARTIN J
• Application Number:
  US10/672,052
• Publication Number:
  US 20040121262A1
• Time in Patent Office: 1,635 Days
• Field of Search: 430/19, 430/270.1, 430/945, 544/35, 544/37
• US Class Current: 430/270.15
• CPC Class Codes: C07D 279/18 [b, e]-condensed with two six-membered rings
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00608 wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air
• CPC Class Codes: G11B 7/252 of layers other than recording layers
• CPC Class Codes: Y10S 430/146 Laser beam

Abstract

A copy-protected optical medium comprising transient optical state change security materials that demonstrating an optical state change when exposed to the wavelengths of from about 770 nm to about 830 nm.

Claims

1. A copy protected optical disc having associated therewith having one or more compounds selected from the group consisting of:

2. A copy-protected optical disc of claim 1 wherein compound(s) are associated with an optical data deformation in a manner such that the read of the optical data deformation is different when the compound(s) are in their initial optical state and their second optical state.

3. A copy-protected optical disc of claim 1 wherein at least one of the compound(s) capable of optical phase change comprises:

[7(Dimethylamino)phenothiazine-3-ylidene]methane-1,1-dicarbonitrile.

4. A copy-protected optical disc having associated therewith a layer comprising phenothiazine-5-ium tetraiodide hydrate wherein such compound is detectable on said optical disc by an optical reader producing a defined wavelength of from about 770 nm to about 830 nm due to change in optical state from an initial optical state to a second optical state.

5. A copy protected optical disc having associated therewith a layer comprising 3-(Dimethylamino)phenothiazine-5-ium Triiodide wherein such compound is detectable on said optical disc by an optical reader producing a defined wavelength of from about 770 nm to about 830 nm due to change in optical state from an initial optical state to a second optical state.