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A photographic technique for assessing the viewing-angle performance of liquid-crystal displays

Publication ,  Journal Article
Fetterly, KA; Samei, E
Published in: Journal of the Society for Information Display
October 1, 2006

Liquid-crystal displays (LCDs) have notable variation in luminance and perceived contrast as a function of the angle from which they are viewed. Though this is an important performance issue for LCDs, most evaluation techniques for assessing this variation have been limited to laboratory settings. This study demonstrates the use of a photographic technique for such an evaluation. The technique is based on an actively cooled charge-coupled-device (CCD) detector in combination with a macro lens covering a circular angular range (8) of ±42.5°. The camera was used to evaluate the luminance and perceived contrast properties of an LCD. Uniform field images corresponding to 17 equally spaced gray-scale values in the digital driving level (DDL) range of the display system were acquired. The 12-bit gray-scale digital images produced by the camera were converted to luminance units (cd/m2) via the measured luminance vs. DDL response function of the camera. The changes in perceived contrast as a function of viewing angle were derived from the Barten model of the gray-scale response of the human-visual system using the methods proposed by the AAPM TC18 Report. The results of this photographic technique were compared to measurements acquired from a similar display using a Fourier-optics-based luminance meter. The results of the two methods generally agreed to within 5%. The photographic methods used were found to be accurate and robust for in-field assessment of the angular response of LCDs over the FOV of the camera. © Copyright 2006 Society for Information Display.

Duke Scholars

Published In

Journal of the Society for Information Display

DOI

ISSN

1071-0922

Publication Date

October 1, 2006

Volume

14

Issue

10

Start / End Page

867 / 872

Related Subject Headings

  • Applied Physics
  • 0912 Materials Engineering
  • 0906 Electrical and Electronic Engineering
  • 0899 Other Information and Computing Sciences
 

Citation

APA
Chicago
ICMJE
MLA
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Fetterly, K. A., & Samei, E. (2006). A photographic technique for assessing the viewing-angle performance of liquid-crystal displays. Journal of the Society for Information Display, 14(10), 867–872. https://doi.org/10.1889/1.2372420
Fetterly, K. A., and E. Samei. “A photographic technique for assessing the viewing-angle performance of liquid-crystal displays.” Journal of the Society for Information Display 14, no. 10 (October 1, 2006): 867–72. https://doi.org/10.1889/1.2372420.
Fetterly KA, Samei E. A photographic technique for assessing the viewing-angle performance of liquid-crystal displays. Journal of the Society for Information Display. 2006 Oct 1;14(10):867–72.
Fetterly, K. A., and E. Samei. “A photographic technique for assessing the viewing-angle performance of liquid-crystal displays.” Journal of the Society for Information Display, vol. 14, no. 10, Oct. 2006, pp. 867–72. Scopus, doi:10.1889/1.2372420.
Fetterly KA, Samei E. A photographic technique for assessing the viewing-angle performance of liquid-crystal displays. Journal of the Society for Information Display. 2006 Oct 1;14(10):867–872.

Published In

Journal of the Society for Information Display

DOI

ISSN

1071-0922

Publication Date

October 1, 2006

Volume

14

Issue

10

Start / End Page

867 / 872

Related Subject Headings

  • Applied Physics
  • 0912 Materials Engineering
  • 0906 Electrical and Electronic Engineering
  • 0899 Other Information and Computing Sciences