| 摘要 |
An optical construction comprises an optically transmissive first layer having a first and second major surfaces, and an optically transmissive second layer adjacent the first major surface and defining an interface. The optically transmissive second layer comprises a binder and optical beads. The binder comprises from 55 to 99.9 percent by weight of polyethylene oxide segments. A weight ratio of the binder to the optical beads is in a range of from 44:56 to 50:50. A light source is disposed in a fixed orientation relative to the optically transmissive second layer. Methods of making optical constructions, and electronic devices containing them, are also disclosed. |
