An optical film includes: a protective layer; and a contrast ratio improvement layer including a first resin layer and a second resin layer facing the first resin layer, the second resin layer and the first resin layer being sequentially stacked from a lower surface of the protective layer, wherein the second resin layer has a refractive index greater than that of the first resin layer. The first resin layer has a patterned portion with at least two embossed optical patterns and flat sections immediately adjacent to and between the embossed optical patterns. The patterned section is in at least a portion thereof facing the second resin layer. A polarizing plate including the optical film and a liquid crystal display apparatus including the polarizing plate are also provided.
一种光学薄膜包括:保护层;以及对比度改进层,包括第一
树脂层和与第一
树脂层相对的第二
树脂层,第二
树脂层和第一
树脂层从保护层的下表面依次叠加,其中第二
树脂层的折射率大于第一
树脂层的折射率。第一
树脂层有一个带图案的部分,至少有两个压花光学图案,以及紧邻压花光学图案和压花光学图案之间的平面部分。图案部分至少有一部分朝向第二
树脂层。此外,还提供了包括该光学薄膜的偏光板和包括该偏光板的液晶显示装置。