OLED panel lower part protection film, and organic light-emitting display apparatus comprising same

A method of applying a lower part protection film for an OLED panel, the method comprising:

• exfoliating a liner film from the lower part protection film to provide a base-carrier film;
• attaching, to the OLED panel, the base-carrier film, from which the liner film is exfoliated;
• and
• exfoliating a carrier film from the base-carrier film attached to the OLED panel,
• wherein the lower part protection film comprises:
• the base-carrier film comprising a base film comprising a first adhesive layer on an upper surface of a first base material and a carrier film comprising a second adhesive layer adhered to a lower surface of the first base material and a second base material adhered to a lower surface of the second adhesive layer;
• and
• the liner film adhered utilizing the first adhesive layer,
• wherein the lower part protection film satisfies both Condition (1) and Condition (2) below:
• (1) a reflectance of the lower part protection film is 12 to 18% at a wavelength of 400 to 700 nm;
• and
• (2) a reflectance ratio between a reflectance of the liner film and a reflectance of the base-carrier film at the wavelength of 400 nm to 700 nm is 1:0.3 to 3.0.