Method of Transforming a Light Beam, Optical Film for Performing the Method, and Display Device Having the Optical Film

摘要

In a method of transforming light, an optical film for performing the method and a display device having the optical film, an optical film includes an anisotropic film, an isotropic film, a lambda/4 phase difference film and a lambda/2 phase difference film. The anisotropic film having a first refractive index with respect to a first ray and a second refractive index with respect to a second ray. A refractive index of the isotropic film is substantially identical to the first refractive index. The lambda/4 phase difference film delays wavelengths of the first and second rays by about lambda/4. The lambda/2 phase difference film delays the wavelength of the second ray by about lambda/2.