A surface light source device and liquid crystal display are capable of
direction-conversion effectively through a double reflections. A back face
of a light guide plate 10 is provided with micro-reflectors projecting
from a general plane of the back face. A main input light H1 to a
micro-reflector 20 is incident to an incidence end face 12 (at point a)
and inputted in a somewhat downward inclined direction. An inner input
light is inner-reflected mainly by a gently inclined slope 21 (point b)
and then impinges on a slope 22 to be reflected again (point c), becoming
an inner output light IO. The inner output light IO is emitted from an
emission face 13 (point d), being supplied to an LCD panel or the like
after transmitting through a light diffusion sheet DF (points e and f). A
reflection member RF having an irregular reflectivity, if disposed,
recovers light leaking through the slope 22 to use the light efficiently
again, thereby providing a reduced fine-unevenness in brightness.
