A display panel is provided to improve image quality by increasing a dark/bright contrast by adopting improved films and filters in a PDP(Plasma Display Panel). A film to be attached to a display panel includes a black layer(152), a reflective layer(151), and a light guide(154). The black layer prevents an external beam from being inputted into the display panel. The reflective layer prevents the light emitted from the display panel, from being absorbed by the black layer. The light guide refracts the light emitted from the display panel, so that the refracted light is emitted in a direction normal to the display panel.
