An anisotropic scattering sheet is adapted to scatter an incident light in a
light-advancing
direction and has a light-scattering characteristic F() that satisfies the
following expression representing a relation between a light-scattering angle
and a scattered light intensity F over a range of =4 to 30: Fy()/Fx()2,
wherein Fx() represents the light-scattering characteristic in a direction
of a X-axis and Fy() represents a light-scattering characteristic in a Y-axial
direction which is perpendicular to the X-axial direction.
