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Super resolution projection: leveraging the MEMS speed to double or quadruple the resolution
Author(s): Molly N. Sing; Terry A. Bartlett; William C. McDonald; Jeffrey M. Kempf
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Paper Abstract

Texas Instruments’ digital mirror device (DMD) uses thousands to millions of individual micromirrors to direct light as a Spatial Light Modulator (SLM). The Tilt-Roll-Pixel (TRP) is currently the smallest DLP Products pixel node at 5.4μm pitch. The small micromirror size, which enables fast switching speed, and precise tilt angles, exploits this speed on a system level to double or quadruple the resolution by using super-resolution projection. Super-resolution projection overlays multiple sub-sampled images, each shifted on the screen by a fraction of a pixel, and as long as the shifting occurs at a rate faster than the critical flicker fusion threshold, the human visual system will act as a temporal low pass filter and naturally integrate all low-resolution SLM images into a single super-resolution result. This paper will discuss the operation of the TRP node, how this node can be operated more quickly, how super-resolution projection works, and how we modified the optical architecture to leverage the switching speed for super-resolution projection.

Paper Details

Date Published: 4 March 2019
PDF: 10 pages
Proc. SPIE 10932, Emerging Digital Micromirror Device Based Systems and Applications XI, 109320R (4 March 2019); doi: 10.1117/12.2512005
Show Author Affiliations
Molly N. Sing, Texas Instruments Inc. (United States)
Terry A. Bartlett, Texas Instruments Inc. (United States)
William C. McDonald, Texas Instruments Inc. (United States)
Jeffrey M. Kempf, Texas Instruments Inc. (United States)

Published in SPIE Proceedings Vol. 10932:
Emerging Digital Micromirror Device Based Systems and Applications XI
Michael R. Douglass; John Ehmke; Benjamin L. Lee, Editor(s)

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