棱镜膜

棱镜膜是一种用于LCD显示器背光组件的微结构光学膜。其表面具有精确排列的微观棱镜脊（通常为90度角），这些棱镜脊将来自导光板的光线折射并导向观看者。这种光学处理增加了轴向亮度，改善了视角性能，并将整体显示亮度效率提高至无棱镜膜系统的1.5-2倍。该膜与扩散膜和反射片等其他光学层协同工作，在显示表面实现均匀照明。

棱镜膜基于全内反射和光线重定向原理工作。当来自背光的光以各种角度进入膜时，棱镜结构将光线折射并导向法线观看方向。微观棱镜阵列（通常间距为24-50μm）通过斯涅尔折射定律弯曲离轴光线，将亮度集中在所需的观看锥内，同时最小化吸收或散射造成的光损失。

Prism films operate on the principle of total internal reflection and light redirection. When light from the backlight enters the film at various angles, the prism structures refract and redirect the light rays toward the normal viewing direction. The microscopic prism arrays (typically with pitch between 24-50μm) bend off-axis light through Snell's Law of refraction, concentrating luminance within the desired viewing cone while minimizing light loss through absorption or scattering.