ENHANCED UNIFORMITY BACKLIGHT

摘要

Enhanced uniformity backlights and methods of assembling a backlight are disclosed. The backlights maintain light uniformity by generating a plurality of images of a linear light source instead of by increasing the number of light sources. A microstructured film receives light from the linear light source and refracts the light to an image receptor. The microstructured film includes an array of microstructures that have a symmetry that provides multiple images of the light source. The positioning and brightness of the images on the image receptor is dependent on the microstructure and the orientation of the microstructure to the linear light source. A method is disclosed to identify the relative orientation of symmetric microstructures which can provide more uniform images of the linear light source.