A Fresnel lens sheet has a light-receiving surface and a light-emitting surface.
The light-receiving surface is provided with a plurality of prism groups, each
including a plurality of straight or circular prisms. Each of the prisms of the
prism groups has a total reflection surface that reflects incident light totally
toward a viewing side. The height of the prisms formed in a predetermined specific
region in the light-receiving surface of the Fresnel lens sheet is bigger than
that of the prisms in another region.