Display Light Guide with Segmented Transparent Layer for Uniform Luminance

The light guide element is segmented into multiple functional regions: a light source region, a first light guide region with first inclined surfaces, and a second light guide region with second inclined surfaces. This segmentation allows different regions to perform specialized functions - the first region handles initial light propagation while the second region corrects luminance non-uniformity, thereby improving overall luminance uniformity without significantly increasing overall device complexity

Different regions of the light guide element are given different local properties through varying inclined surface configurations. The first light guide region has inclined surfaces optimized for initial light distribution, while the second light guide region has inclined surfaces specifically designed to correct luminance non-uniformity. This local differentiation enables targeted optimization of luminance uniformity in different areas

The light guide element employs dynamic light control through variable inclined surfaces. The inclination angles of the surfaces are strategically designed to dynamically redirect light paths - steeper angles near the light source to distribute light over larger areas, and gentler angles in intermediate regions to maintain luminance levels, thereby achieving both reduced light loss and improved uniformity

The inclined surface angles are optimized as key parameters to control light propagation. By changing the inclination angle parameter across different regions - with larger angles in the first light guide region and smaller angles in the second region - the system achieves optimal balance between light loss reduction and luminance uniformity