liquid crystal with polarizing plates and dye - anzeigeelement enthaltendem nematischem liquid crystal

摘要

PURPOSE:To display various colors with good contrast by providing polarizing plates, whose polarization directions are regulated, over both surfaces of a 90 deg. TN oriented liquid crystal cell having mixed N type coloring matter having the same major axis direction with liquid crysral molecules. CONSTITUTION:In a liquid crystal cell 11 wherein liquid crystal molecules 13 differ in orientation direction by about 90 deg. between one surface 12 and the other surface 14, N type coloring matter 15 is dissolved in the same major axis direction with the liquid crystal molecules 13. Over both the surfaces of the liquid crystal cell 11, polarizing plates 18 and 25 are provided opposite to each other and their polarization directions are made to coincide with orientation directions of liquid crystal molecules 13 on the surfaces 12 and 14 of the cell 11, thus obtaining the titled liquid crystal display element. Conseqnetly, applying an AC voltage to the cell permits a colorless polarizing plate, when used as the polarizing plate 25, to provide black display or a color polarizing plate, when in use, to bring out a color close to it own color with good contrast.