A plurality of LEDs are arrayed in a single row between the opposing end faces of a pair of first and second light guide plates that are disposed so that the end faces thereof face each other. In one example, three pairs of symmetric points establish an initial relationship between the original image and a virtual image, then additional pairs of symmetric points in the original image are reconstructed. The amplitude A8 is less than A4. The second plate is assembled to the first plate. The structures are made of a nonconductive material that is different in refractive index from a material of what is formed around them.