| abstract |
The present invention provides a display device comprising a crystalline polymer piezoelectric layer comprising an optically active helical chiral polymer (A) having a weight average molecular weight of 50,000 to 1 million, and an optical compensation device satisfying the following formula 1: layers, and linear polarizers. (Formula 1): |0.06×Xc×MORc×d+Rth|≤500 [In Formula 1, Xc represents the crystallinity (%) obtained by the DSC method of the above-mentioned crystalline polymer piezoelectric layer, and MORc represents the above-mentioned crystal The normalized molecular orientation of the crystalline polymer piezoelectric layer measured by a microwave transmission type molecular orientation meter when the reference thickness is 50 μm, d represents the thickness (μm) of the above-mentioned crystalline polymer piezoelectric layer, and Rth represents the wavelength at 550 nm The phase difference (nm) in the thickness direction of the above-mentioned optical compensation layer. ]. |