Primary light is directed to a light path control plate from at least one
point-like light source. The light path control plate has an inner face
on which projection-like transmission-reflection portions and
curved-for-refraction portions are alternately formed along a
leaving-direction from an optical axis direction of the point-like light
source, wherein each transmission-reflection portion is composed of a
transmission face permitting primary light to transmit through the
transmission face and a reflection face which reflects the transmitted
light as to bring changed light paths directed to an outer face of the
light path control plate while each curved-for-refraction portion
refracts primary light as to bring changed light paths directed to the
outer face of the light path control plate. First light reaching the
outer face via the transmission-reflection portions and second light
reaching the outer face via the curved-for-refraction portions are
generated from primary light. The first light and second light are
emitted from the outer face. A plurality of sections each of which is
equivalent to the above light path control plate may be formed on
substrate for providing illumination for a large screen display.