Abstract
A novel scheme of projection film screen to get ultra large color gamut using photonic band gap reflection mechanism is proposed. The projection screen made by a kind of film that can only reflect three narrowband R/G/B light emitted from projector (E.g., 460nm, 560nm and 650nm), as well as absorb other visible light wavelengths. The film has a well‐designed nano level multilayer structure which can form three photonic band gaps to reflect 460nm, 560nm and 650nm light respectively. An ultra large color gamut of 73.44% Rec2020 (138.68% sRGB) was obtained even under a bright room ambient light, that makes projection image quality comparable to a traditional TV. It could be an effective way to help solve the problem of dull color performance shown on traditional projection screens.
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