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35.4: A High Contrast Ratio and Compact‐sized Prism for DLP Projection System
Author(s) -
Huang YungChih,
Pan JuiWen,
Chiang CheWen,
Lin PingChun,
Chang KaoDer
Publication year - 2015
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.10450
Subject(s) - separator (oil production) , optics , contrast ratio , projection (relational algebra) , image quality , contrast (vision) , prism , total internal reflection , materials science , computer science , artificial intelligence , mathematics , physics , image (mathematics) , algorithm , thermodynamics
In this paper, a novel light separator with contrast ratio enhancement but maintaining the optical efficiency of the DLP projection system is proposed. The main capability of the novel light separator is to direct the uncontrolled light away from the image system. The working theorem for the novel light separator is derived as well. Uncontrolled light is kept away from the image system by a total internal reflection surface, thereby effectively improving the image quality. Compared with previous work, the FO:FO contrast ratio can be improved from 46347:1 to 48250:1, the ANSI can be improved from 295:1 to 306:1, while the image system efficiency remains at 76.2%.