Method of transforming a light beam, optical film for...

Details Method of transforming a light beam, optical film for... Method of transforming a light beam, optical film for...

2008-07-29

2008-07-29

Pak, Sung (Department: 2874)

Optical: systems and elements

Polarization without modulation

With color filter

Reexamination Certificate

active

07405878

ABSTRACT:
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 λ/4 phase difference film and a λ/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 λ/4 phase difference film delays wavelengths of the first and second rays by about λ/4. The λ/2 phase difference film delays the wavelength of the second ray by about λ/2.

REFERENCES:
patent: 7232594 (2007-06-01), Miroshin et al.

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