A liquid-crystal display device has a light pipe, a light source, a reflection
layer, and a liquid-crystal shutter. The light pipe includes light output means
formed on an upper surface of the light pipe. The light source is disposed near
to an incident side surface of the light pipe so that light incident from the light
source is output from a lower surface of the light pipe through the light output
means. The reflection layer is disposed on the lower surface of the light pipe
so that reflected light of the output light is transmitted through the upper surface
of the light pipe. The liquid-crystal shutter is disposed above the upper surface
of the light pipe, the liquid-crystal shutter including liquid-crystal cells and
at least one polarizing plate.