LIQUID CRYSTAL DISPLAY ELEMENT AND PRODUCTION THEREOF

摘要

PURPOSE:To provide a liquid crystal display element having a steeper V-T characteristic and the process for production of such element by adding a small amt. of a high-polymer material to a liquid crystal layer arranged between a pair of transparent substrates. CONSTITUTION:A liquid crystal cell is constituted by packing a liquid crystal material 3 between a pair of the transparent substrates 1 and 2. The transparent substrates 1, 2 have transparent electrodes, oriented films, etc., on their inner side surfaces. The orientation directions are orthogonal with each other. A pair of polarizers 4, 5 are arranged on the outer side of the liquid crystal cell. The transmittance of a light shut off state is specified to 0 and the transmittance of a light transmission state to 100(%). A liquid crystal material mixture formed by adding 0.5wt.% photosetting monomer material mixed with a chemical sensitizer to a polyisoprene is injected into an empty cell. The TN liquid crystal cell of the V-T characteristic is obtd. when the monomer material is thereafter polymerized and cured by irradiating the liquid crystal cell with UV rays. The value of the constant gamma of the V-T characteristic is about 1.06 and is definitely improved in steepness as compared with the conventional liquid crystal cells.