PHOTOLUMINESCENCE POLYIMIDE, PREPARING METHOD THEREOF AND DISPLAY DEVICE EMPLOYING THE PHOTOLUMINESCENCE POLYIMIDE AS COLOR-DEVELOPING SUBSTANCE

摘要

PURPOSE: A luminous polyimide used as color developing material of the display element is provided for improving luminous property within the blue color area by introducing desired conjugation groups in the main chains or branched chains. CONSTITUTION: The luminous polyimide suitable for the color developing material of the display element having high luminous property within the blue color area has the formula 1 (wherein A is selected from radicals represented by the following formula (I); Y is selected from -O-, -OCH2CH2O-, C(CF3)2-, -SO2- and -C(CH3)2-; B is the radicals of the following formula (II); X is selected from -O-, -S-, -NH-, -NCH3-, -NCH2CH3-, -NCH2(CH2)nCH3- and -NCOOCH3-; n is integer of 1-20; and m is integer of 10-100). The polyimide is produced by condensing acidic anhydride and diamine compounds to form polyimide precursor; and thermally imidizing the polyimide precursor.