2results about How to "Improve afterimage problem" patented technology

Disclosed is a liquid crystal composition. The liquid crystal composition includes liquid crystal molecules including at least one of a liquid crystal compound having an alkenyl group and a liquid crystal compound having an alkoxy group, and a first stabilizer including a compound having a structure represented by Formula 1:where n is 0 or 1; m is 0 or 1; k is 0 or 1; Z1, Z2, and Z3 are each independently a single bond, —C═C—, —OCO—, —COO—, —CF2O—, or a C1 to C5 alkylene group; X1, X2, X3, and X4 are each independently hydrogen or halogen; Y is hydrogen, an alkylene group, an alkoxy group, a hydroxyl group, —NHCOCH3, or ═O; and A and B are cyclic compounds.

In order to improve the AMOLED display quality, the application solves the residual image problem by using a polyimide material. The application discloses a polyimide precursor prepared from diamine monomers and dianhydride monomers. The application introduces 0.1-6 mol% fluorine-containing diamine monomers into the diamine monomers and 0-4 mol% fluorine-containing dianhydride monomers into the dianhydride monomers to reduce the dielectric constant of the polyimide precursor after curing. Meanwhile, the application discloses a preparation method of the polyimide precursor. The method controls the water content of the reaction system to perform high-temperature hydrolysis reaction, so as to control the proportion of the amine group as the end and the carboxyl group as the end, thereby achieving the effect of adjusting the viscosity of the polyimide precursor slurry. In the case of combining the fluorine-containing reaction raw materials and the high-temperature hydrolysis reaction, the viscosity of the polyimide precursor slurry is more controllable, the dielectric constant of the polyimide film is lower, and the expansion coefficient is smaller, thereby achieving a better effect of improving the residual image.