| abstract |
Optical substrates such as films and sheets, and methods for making optical substrates are described. The optical substrates contain at least one layer that contains glass or polymeric materials and boron nitride particles. The boron nitride particles have the requisite optical properties as well as excellent thermal conductivity, thus minimizing the potential for cracks, waves and wrinkles due to excess heat generated in applications such as liquid crystal displays, projection displays, traffic signals, and illuminated signs. |