Disclosed is a composition for a diffuser sheet or film with improved luminance or brightness. The composition comprises about 80 to about 99.8 percent by weight of a miscible blend of a polycarbonate with a polyester, and about 0.2 to about 20 percent by weight of a particulate light diffusing component, and about 10 to about 1000 ppm of a brightness enhancing agent. Also disclosed is a process for the preparation of a diffuser film or sheet from this composition. Diffuser films and sheets prepared from this composition are useful for bulk light diffusers for backlight displays.
本发明涉及一种具有改进亮度或亮度的扩散片或膜的组合物。该组合物包括大约80至大约99.8重量%的聚
碳酸酯与聚酯的混合物,以及大约0.2至大约20重量%的颗粒状光扩散成分和大约10至大约1000 ppm的增亮剂。本发明还公开了一种从该组合物制备扩散膜或片的方法。从该组合物制备的扩散膜和片用于背光显示器的大量光扩散器。