| abstract |
Cellulose acylate optical with improved humidity dependence of optical anisotropy, low moisture permeability, reduced surface contamination by retardation increasing agents, plasticizers, etc., excellent display quality and excellent optical compensation Provide compensation sheet. Moreover, it is providing the polarizing plate and liquid crystal display device which used this optical compensation film. The film contains an aromatic compound having at least two aromatic rings, the concentration of the aromatic compound is higher in the film than in the vicinity of the film surface, and the letters in the film in-plane direction and the thickness direction at a wavelength of 550 nm are used. An optical compensation sheet having at least a cellulose acylate film having a foundation value in the range of 2 to 200 nm and 50 to 400 nm, respectively, and a moisture permeability of 2 to 150 g / m 2 ยท 24 h. [Selection figure] None |