Squarylium dye and filter for display device
AssigneeMitsubishi Chemical Corporation
InventorTetsuo Ozawa
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Abstract
A filter for a display device, which comprises a dipyrazolylsquarylium dye represented by formula: wherein A and B each independently represent a substituted or unsubstituted pyrazolyl group. The filter is excellent in resistance to heat and light and gives no adverse influences on luminescence of the three primary colors, red, green and blue.
Claims15
In a process for making a filter of a display device, wherein said filter contains coloring matter, the improvement which comprises using coloring matter comprising a dipyrazolylsquarylium compound represented by formula (I):
- wherein A and B each independently represent a substituted or unsubstituted pyrazolyl group.
A filter for a display device, which comprises a substrate having thereon at least a layer containing coloring matter comprising a dipyrazolyisquarylium compound represented by formula (I):
- wherein A and B each independently represent a substituted or unsubstituted pyrazolyl group.
A squarylium compound represented by formula (II):
- wherein R1 represents a substituted or unsubstituted alkyl group;
- R2 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;
- and R1and R2 may be the same or different.
Dependencies are inferred from the claim text.