Patent ID: 7967494

Claim:
A light guide panel, comprising: a lateral side configured to transmit light to an interior of the light guide panel; a rear side configured to reflect light to the interior of the light guide panel; and a front side configured to emit light from the interior of the light guide panel, wherein: the rear side includes dot patterns or stripe patterns, each pattern having a plurality of wedge-shaped rear prisms disposed therein, each wedge-shaped rear prism having a multi-faceted wedge that projects from the rear side of the light guide panel, and the multi-faceted wedge includes pairs of mirror-image facets that are angled relative to one another so as to form two interior angles of about 60 degrees to about 120 degrees, each side of the pairs of mirror-image facets including two straight facets that meet at a point of inflection such that the multi-faceted wedge includes at least four facets.