ABSTRACT

A controllable viewing angle optical film (CVOF) using a microprism array filled with liquid crystal is proposed, the display performance of small and large viewing angles can be tunable for liquid-crystal displays (LCDs). Two microprisms with different heights are formed in the proposed optical film. The different diffuse abilities of the proposed optical film can be obtained by adjusting the applied voltage, the contrast loss problem of the conventional optical film is solved. Our simulation results reveal that the contrast of the normal viewing angle is increased from 1429 to 4909 as the applied voltage is zero, and the brightness is increased by 41.4% and 89.4% at the large polar viewing angle (45° and 60°) when the applied voltage is 15 V, respectively.

摘要

提出了一种使用充满液晶的微棱镜阵列的可控视角光学薄膜（CVOF），液晶显示器（LCD）的小视角和大视角的显示性能都可以调节。在所提出的光学膜中形成具有不同高度的两个微棱镜。通过调节外加电压可以得到所提出的光学膜的不同扩散能力，解决了传统光学膜的对比度损失问题。我们的模拟结果表明，当外加电压为零时，正常视角的对比度从 1429 增加到 4909，并且在大极视角（45°和 60°）下亮度增加了 41.4% 和 89.4%。外加电压分别为 15 V。