A display device includes a reflective polarizer beneath a liquid-crystal
display panel, and a light diffusing plate and a lighting apparatus
disposed beneath the reflective polarizer. In a reflective display mode,
the display device presents a specular display resulting from a light ray
reflected by the reflective polarizer and a diffusion display resulting
from a diffused light. In a transmissive display mode, the display device
presents a dark display and a diffusion display caused by the light
diffusing plate.