Contrast-improving methods for Digital Micromirror Device projectors

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...

Full description

Saved in:
Bibliographic Details
Published in:Optical Engineering 2003-03, Vol.42 (3), p.840-845
Main Authors: Meuret, Youri, De Visschere, Patrick
Format: Article
Language:English
Subjects:
contrast
DMD
projection displays
ray tracing
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. ©
ISSN:0091-3286
1560-2303
DOI:10.1117/1.1542594