P‐27: A Small‐Area Backlight Employing Divergent‐Angle Beam Rotator and Unique Double‐Layer Micro‐Prisms

Abstract An energy efficient Divergent Angle Rotator backlighting technology is developed to illuminate small size displays using point‐like light sources. Based on reflecting light beams from tilted surfaces created on the top surface of the light pipe, this technology not only effectively converts light from a point‐like light source into a collimated planar light source but also eliminates images of the light source in the specular reflection based backlighting system. It collimates light beams on both dimensions.