Patent ID: 7947342

Claim:
A polarizer protective film comprising: a cellulose ester; a saccharide ester having: an ester of compound (A), the compound (A) having one furanose structure or one pyranose structure in the molecule, wherein all or a part of OH groups in the compound (A) are esterified, or an ester of compound (B), the compound (B) having two to twelve of at least one of a furanose structure and a pyranose structure bonded in the molecule, wherein all or a part of OH groups in the compound (B) are esterified; and a compound represented by Formula (R): wherein R 2 to R 5 each independently represent a hydrogen atom or a substituent; R 2 and R 3 , R 3 and R 4 , and R 4 and R 5 may be combined to form a ring; R 6 represents a hydrogen atom or a substituent; n represents an integer of 1 or 2; when n equals to 1, R 1 represents a substituent; and when n is 2, R 1 represents a divalent linkage group, and wherein the polarizer protective film has a variation of 5 to 15 nm in thickness direction retardation value due to a humidity change between 20% RH and 80% RH conditions at 23° C. when the film has a film thickness of 80 μm.