PROJECTION DISPLAYS

Contrast-improving methods for Digital Micromirror Device projectors

[+] Author Affiliations
Youri Meuret, Patrick De Visschere

Ghent University (ELIS), Sint-Pietersnieuwstraat 41, B-9000?Gent, Belgium E-mail: ymeuret@elis.rug.ac.be

Opt. Eng. 42(3), 840-845 (Mar 01, 2003). doi:10.1117/1.1542594
History: Received May 13, 2002; Revised Aug. 21, 2002; Accepted Sep. 5, 2002; Online March 07, 2003
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This paper discusses contrast degradation in projection displays that use the Digital Micromirror Device™ (DMD™) of Texas Instruments. Various possible mechanisms for the degradation of the contrast ratio are investigated by using optical ray-trace simulations and performing some experiments. It is found that the scattering of light at the DMD is the principal source of contrast degradation. This scattering is implemented in our simulations of the DMD projector in the optical ray-trace program ASAP. This enables us to simulate the contrast ratio in a realistic way. Two methods to improve the contrast ratio are proposed. Both methods, however, reduce the total light transmission of the projector. These methods are illustrated with our simulation model, and quantitative results are given. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

Youri Meuret and Patrick De Visschere
"Contrast-improving methods for Digital Micromirror Device projectors", Opt. Eng. 42(3), 840-845 (Mar 01, 2003). ; http://dx.doi.org/10.1117/1.1542594


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