POLARIZING ELEMENT AND POLARIZING PLATE FOR DISPLAY DEVICE HAVING BLUE LIGHT EMITTING ELEMENT

摘要

In an organic electroluminescent display device, it relates to a polarizing element or a polarizing plate capable of improving contrast and enhancing color display. For a substrate having a polarizing function containing an azo compound, the transmittance in the simple substance of the substrate is 45% to 60%, the average transmittance of 440nm to 500nm of one substrate is 50% or more, and two substrates Is controlled to be orthogonal to the absorption axis direction so that the average transmittance of 550 nm to 650 nm obtained by measurement is 10% or less.