公开(公告)号：EP1521107A4

公开(公告)日：2009-02-18

申请号：EP03762876

申请日：2003-07-03

申请人： KYOWA HAKKO CHEMICAL CO LTD

发明人： SHIMIZU I ,  KINUGASA M ,  TOYODA H ,  IKUTA M ,  KATAGI KYOKO

IPC分类号： C07D207/32 ,  C07D207/335 ,  C07D209/14 ,  C07D403/08 ,  G02B5/22 ,  G09F9/00 ,  H01J11/00

CPC分类号： C07D207/335 ,  C07D209/14 ,  C07D403/08 ,  G02B5/223 ,  H01J2211/44 ,  Y10T428/1041

摘要： Filters for electronic displays which contain squarylium compounds represented by the general formula (I) and can selectively intercept rays of light having wavelengths lowering color purity to thereby provide clear images: (I) wherein R1 is hydrogen, alkyl, or the like; R2, R3 and R4 are each hydrogen, halogeno, alkyl, or the like; and X is a group represented by the general formula (A) or the like: (A) (wherein R5, R6, R7, and R8 are each hydrogen, halogeno, alkyl, or the like; and R9 and R10 are each hydrogen, alkyl, or the like).