Method of enabling data entry using substrate comprising IR-absorbing dye

• US 7,946,701 B2
• Filed: 07/09/2009
• Issued: 05/24/2011
• Est. Priority Date: 07/05/2005
• Status: Expired due to Fees

• Current Assignee: BASF SE
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Silverbrook, Kia, Indusegaram, Sutharsiny, Vonwiller, Simone Charlotte, Starling, Scott Matthew, Ridley, Damon Donald, Gonzaga, Graciel
• Primary Examiner(s): Shah; Manish S
• Application Number:
  US12/500,578
• Publication Number:
  US 20090266877A1
• Time in Patent Office: 684 Days
• Field of Search: 345/105, 345/101, 345/95, 345/100, 428/195, 428/32.1
• US Class Current: 347/105
• CPC Class Codes: C09B 47/0676 having nitrogen atom(s) linked directly to the skeleton
• CPC Class Codes: C09B 47/30 Metal-free phthalocyanines
• CPC Class Codes: C09D 11/328 characterised by dyes
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Abstract

A method of enabling entry of data into a computer system via a printed substrate. The substrate has a surface containing human-readable information and machine-readable coded data. The coded data is indicative of an identity of the substrate and of a plurality of reference points on the surface. The method includes the steps of: operatively positioning a sensing device relative to the surface and sensing the coded data; generating indicating data using the sensed coded data; and sending the indicating data to a computer system. The coded data comprises an IR-absorbing dye having a nitrogen-substituted phthalocyanine.

Claims

1. A substrate for enabling entry of data into a computer system, said substrate having a dye disposed thereon, wherein said dye is of formula (IV) or (V):

2. The substrate of claim 1, wherein M is SnCl₂, V═

O or Ga(OH).

3. The substrate of claim 1, wherein said dye is disposed in the form of coded data.

4. The substrate of claim 1, wherein said substrate has a surface containing human-readable information and machine-readable coded data.

5. The substrate of claim 4, wherein the machine-readable coded data is indicative of an identity of the substrate and of a plurality of reference points on the surface.