A transparent lightguide (3) which guide light at least from one side end plane is characterized in that a large number of speckled, solid-line shaped or broken-line shaped protruding patterns whose cross-sectional width W (.mu.m) at a cross section perpendicular to the axis of a linear light source...http://www.google.es/patents/US6215936?utm_source=gb-gplus-sharePatente US6215936 - Lightguide having trapezoidally-shaped main body with a level surface at an angle to a rear surface
Lightguide having trapezoidally-shaped main body with a level surface at an ...
