Method of interacting with substrate comprising ir-absorbing coding pattern

Abstract

A method of interacting with a printed substrate comprising a coding pattern printed with an IR-absorbing ink. The method comprises the steps of: operatively positioning an optically-imaging sensing device relative to the substrate and sensing part of the coding pattern; and generating interaction data using the sensed coding pattern. The IR-absorbing ink comprises a dye of formula (I): wherein M is Ga(A 1 ); A 1 is an axial ligand selected from the group consisting of: OH and halogen; R 1 and R 2 may be the same or different and are selected from the group consisting of: hydrogen and C 1-12 alkoxy; and W is a sulfonic acid group or salts thereof.

1 . A method of interacting with a printed substrate, said substrate comprising a coding pattern printed with an IR-absorbing ink, said method comprising the steps of:
 operatively positioning an optically-imaging sensing device relative to the substrate and sensing at least part of the coding pattern; and   generating interaction data using the sensed coding pattern, wherein said IR-absorbing ink comprises a dye of formula (I):   
     
       
         
         
             
             
         
       
     
     wherein 
     M is Ga(A 1 ); 
     A 1  is an axial ligand selected from the group consisting of: OH and halogen; 
     R 1  and R 2  may be the same or different and are selected from the group consisting of: hydrogen and C 1-12  alkoxy; and 
     W is a sulfonic acid group or salts thereof. 
   
   
       2 . The method of  claim 1 , wherein each W is a cationic nitrogen salt of a sulfonic acid group. 
   
   
       3 . The method of  claim 2 , wherein:
 each W is SO 3 Z;   Z is N + (R m )(R n )(R s )(R t ); and   R m , R n , R s , R t  may be the same or different and are independently selected from the group consisting of: H, C 1-8  alkyl, C 6-12  arylalkyl and C 6-12  aryl.   
   
   
       4 . The method of  claim 1 , wherein R 1  and R 2  are both H. 
   
   
       5 . The method of  claim 1 , wherein M is Ga(OH). 
   
   
       6 . The method of  claim 1 , wherein the coding pattern identifies a substrate identity and said interaction data identifies said substrate identity. 
   
   
       7 . The method of  claim 1 , wherein the coding pattern identifies a plurality of locations, and said interaction data identifies a position of the sensing device relative to the said substrate. 
   
   
       8 . The method of  claim 1 , further comprising the step of:
 communicating the interaction data to a computer system for interpretation.   
   
   
       9 . The method of  claim 8 , further comprising the step of:
 causing the computer system to perform a predetermined action upon receipt of said interaction data.   
   
   
       10 . A system for interacting with a printed substrate, said system comprising:
 a substrate comprising a coding pattern printed with an IR-absorbing ink; and   a sensing device for interacting with the substrate, said sensing device comprising an image sensor and a processor for generating interaction data using images captured by the image sensor,   
     wherein said IR-absorbing ink comprises a dye of formula (I): 
     
       
         
         
             
             
         
       
     
     wherein 
     M is Ga(A 1 ); 
     A 1  is an axial ligand selected from the group consisting of: OH and halogen; 
     R 1  and R 2  may be the same or different and are selected from the group consisting of: hydrogen and C 1-12  alkoxy; and 
     W is a sulfonic acid group or salts thereof. 
   
   
       11 . The system of  claim 10 , wherein each W is a cationic nitrogen salt of a sulfonic acid group. 
   
   
       12 . The system of  claim 11 , wherein:
 each W is SO 3 Z;   Z is N + (R m )(R n )(R s )(R t ); and   R m , R n , R s , R t  may be the same or different and are independently selected from the group consisting of: H, C 1-8  alkyl, C 6-12  arylalkyl and C 6-12  aryl.   
   
   
       13 . The system of  claim 10 , wherein R 1  and R 2  are both H. 
   
   
       14 . The system of  claim 10 , wherein M is Ga(OH). 
   
   
       15 . The system of  claim 10 , wherein the coding pattern identifies a substrate identity and said interaction data identifies said substrate identity. 
   
   
       16 . The system of  claim 10 , wherein the coding pattern identifies a plurality of locations, and said interaction data identifies a position of the sensing device relative to the said substrate. 
   
   
       17 . The system of  claim 10 , further comprising a computer system for interpreting the interaction data.