GLASS SUBSTRATE FOR DISPLAYS

摘要

A glass substrate for liquid crystal displays capable reducing the luminance variation of a liquid crystal display having even a large screen. The glass substrate is characterized in that the rate of change ((A-A')/50)of A and A' is 4.0x10^-7 or less where A is a value determined by {sin(2?²x{sin(180° ?/550² at a given measurement point a where ? (nm) is the retardation measured at intervals of 50 mm within the glass substrate with a light beam perpendicular to the surface of the glass substrate and ? (°) is the angle of direction of the retardation with respect to the direction along the side of the glass substrate and A' is a value determined by {sin(2?²x{sin(180° ?/550² at a given measurement point a' adjacent to the measurement point a.