Compact tiled display with uniform illumination

Bordes, N. S., Pailthorpe, B. S. and Bleha, W. P. (2003) Compact tiled display with uniform illumination. Journal of Electronic Imaging, 12 4: 682-688. doi:10.1117/1.1607965

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Author Bordes, N. S.
Pailthorpe, B. S.
Bleha, W. P.
Title Compact tiled display with uniform illumination
Journal name Journal of Electronic Imaging   Check publisher's open access policy
ISSN 1017-9909
Publication date 2003-10-01
Sub-type Article (original research)
DOI 10.1117/1.1607965
Open Access Status File (Publisher version)
Volume 12
Issue 4
Start page 682
End page 688
Total pages 7
Editor Allebach, Jan P.
Place of publication Springfield, VA
Publisher The Society for Imaging Science and Technology
Language eng
Subject 280203 Image Processing
Abstract The demand for more pixels is beginning to be met as manufacturers increase the native resolution of projector chips. Tiling several projectors still offers a solution to augment the pixel capacity of a display. However, problems of color and illumination uniformity across projectors need to be addressed as well as the computer software required to drive such devices. We present the results obtained on a desktop-size tiled projector array of three D-ILA projectors sharing a common illumination source. A short throw lens (0.8:1) on each projector yields a 21-in. diagonal for each image tile; the composite image on a 3×1 array is 3840×1024 pixels with a resolution of about 80 dpi. The system preserves desktop resolution, is compact, and can fit in a normal room or laboratory. The projectors are mounted on precision six-axis positioners, which allow pixel level alignment. A fiber optic beamsplitting system and a single set of red, green, and blue dichroic filters are the key to color and illumination uniformity. The D-ILA chips inside each projector can be adjusted separately to set or change characteristics such as contrast, brightness, or gamma curves. The projectors were then matched carefully: photometric variations were corrected, leading to a seamless image. Photometric measurements were performed to characterize the display and are reported here. This system is driven by a small PC cluster fitted with graphics cards and running Linux. It can be scaled to accommodate an array of 2×3 or 3×3 projectors, thus increasing the number of pixels of the final image. Finally, we present current uses of the display in fields such as astrophysics and archaeology (remote sensing).
Keyword Image projection
Tiled images
Computer Science
Interdisciplinary Applications
Electrical & Electronic
Imaging Science & Photographic Technology
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
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Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
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Created: Thu, 31 May 2007, 19:08:13 EST by Mrs Leith Woodall on behalf of School of Mathematics & Physics