Patent ID: 7175948

Claim:
A color filter comprising a colored layer as colored pixels provided on a transparent substrate, said colored layer containing a pyrrolo[3,4-c]pyrrole derivative produced by converting at least one ketopyrrole group in a pyrrolo[3,4-c]pyrrole of formula wherein A and B are each independently of the other a group of formula wherein R 1 and R 2 are each independently of the other hydrogen, halogen, C 1 –C 18 alkyl, C 1 –C 18 alkoxy, C 1 –C 18 alkylmercapto, C 1 –C 18 alkylamino, —CN, —NO 2 , phenyl, trifluoromethyl, C 5 –C 6 cycloalkyl, —C═N—(C 1 –C 18 alkyl), a group of formula imidazolyl, pyrrazolyl, triazolyl, piperazinyl, pyrrolyl, oxazolyl, benzoxazolyl, benzothiazolyl, benzimidazolyl, morpholinyl, piperidinyl, or pyrrolidinyl; G is —CH 2 —, —CH(CH 3 )—, —CH(CH 3 ) 2 —, —CH═N—, —N═N—, —O—, —S—, —SO—, —SO 2 — or —NR 7 ; R 3 and R 4 are each independently of the other hydrogen, halogen, C 1 –C 18 alkoxy, or —CN; R 5 and R 6 are each independently of the other hydrogen, halogen, or C 1 –C 6 alkyl; and R7 is hydrogen or C 1 –C 6 alkyl; and D and E are each independently of the other a group of formula wherein, in the formulae (II), (III), and (IV), m, n, and p are each independently of one another a number of 0 or 1; X is C 1 –C 14 alkylene or C 2 –C 6 alkenylene; Y is a group —V— (CH 2 ) q —; Z is a group —V—(CH 2 ) r —; V is C 3 –C 6 cycloalkylene; q is an integer from 1 to 6; r is an integer from 0 to 6; R 8 and R 9 are each independently of the other hydrogen, C 1 –C 6 alkyl, C 1 –C 4 alkoxy, halogen, CN, NO 2 , unsubstituted phenyl or phenoxy, or phenyl or phenoxy which is substituted by C 1 –C 4 alkyl, C 1 –C 4 alkoxy, or halogen; and Q is hydrogen, CN, Si(R 8 ) 3 , a group C(R 12 )(R 13 )(R 14 ) wherein R 12 , R 13 , and R 14 are halogen, a group of formula wherein R 8 and R 9 are as defined above, a group SO 2 R 15 or SR 15 wherein R 15 represents phenyl which is substituted by a C 1 –C 4 alkyl, a C 1 –C 4 alkoxy, or a halogen, or a group of formula R 10 and R 11 are each independently of the other hydrogen, C 1 –C 18 alkyl, or a group of formula wherein X, Y, R 8 , R 9 , m, and n are as defined above, or R 10 and R 11 , together with the linking nitrogen atom, form pyrrolidinyl, piperidinyl, or morpholinyl radical; with the proviso that, if D and/or E are a group of formula (III), Q is hydrogen, and n is 0, m must be 1 and X must be a C 2 –C 14 alkylene or C 2 –C 8 alkenylene group which is branched at the carbon atom attached to the oxygen atom, said at least one ketopyrrole group being converted to wherein A may be B with the proviso that, if A is B, D is E; and R′ is C 1 –C 5 alkyl.