| 摘要 |
<p>A surface light source element comprises a light source (2), a light conductor (1), of which at least one side end surface facing the light source (2) serves as a light incident surface (11) and of which a surface substantially perpendicular to the light incident surface (11) serves as a light outgoing source (12), and a light declination sheet (3) provided on a light outgoing surface side of the light conductor (1), at least one of the light outgoing source (12) and the rear surface (13) of the light conductor (1) having a minute construction, of which an average inclination is 0.5 to 7.5°. The light declination sheet (3) can be formed of a prism sheet having a multiplicity of prisms (31) formed in parallel to one another on at least one surface thereof. The minute construction can be defined by a multiplicity of rows of prisms which are constituted by a rough surface comprising a multiplicity of substantially spherical-shaped minute convex bodies and an inclined surface extending in parallel to the light incident surface (11) and having an average inclination of 0.5 to 7.5°.</p> |
