| 摘要 |
This disclosure provides systems, methods and apparatus for providing illumination by using a light guide to distribute light. In an aspect, an illumination system is provided with a substrate having a first side and a second side opposite the first. The substrate can be optically transmissive and form part of the light guide for distributing light. The first side of the substrate is processed using a first processing technology. Processing the first side includes forming a light turning feature on the first side and forming a protective layer over the light turning feature. The second side is processed using a second processing technology to form display elements, while the protective layer protects the first side from damage. The first and second processing technologies can be performed using the same tool set. In addition to protecting the first side, the protective layer may function as an optical cladding and/or passivation layer. |
