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Effects of ambient-light correction in luminance measurements of liquid-crystal display monitors by use of a telescopic-type luminance meter

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Abstract

The quality control of liquid-crystal display (LCD) monitors has become one of the important topics for maintaining reliable soft-copy readings in the interpretation of diagnostic images. In this paper, the effects of correction in the luminance measurement of an LCD monitor by use of a telescopic-type luminance meter were investigated. The luminance of the LCD monitor in different ambient-lighting conditions was measured and compared to the results obtained with no ambient lighting (0 lux). The reproducibility of luminance measurements and luminance ratios without a baffled tube was lower than those measured with the baffled tube due to the effect of ambient light. These tendencies were obvious at a relatively low luminance. The correction method by subtraction of the reflected ambient light on the surface of the LCD monitor and the stray light of the telescopic-type luminance meter from the measured luminance was examined. We found that the correction was able to bring the luminance close to that measured with the baffled tube.

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Acknowledgments

The authors are grateful to Kenji Numaguchi and Yasuyoshi Kuroiwa and other members of Department of Radiological Technology, Koga General Hospital, for their assistance. The authors thank Noriyuki Hashimoto and Shigehisa Ogawa (Eizo Nanao Corporation, Ishikawa, Japan) for helpful suggestions and Shinji Kawamura, Ph.D. (Department of Radiology, Miyazaki University Hospital), for support of this work. We are grateful to the Editorial Assistant of this Journal for providing initial and final polishing of the submitted manuscript in improving the readability and English expressions, and to the Editors and reviewers for giving us useful comments and suggestions for improving our manuscript.

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Authors and Affiliations

  1. Department of Radiological Technology, Koga General Hospital, 1749-1 Sutagi, Ikeuchi-cho, Miyazaki, 880-0841, Japan

    Takuro Shiiba, Shinji Tateoka & Masaji Maeda

  2. Department of Radiology, Koga Ekimae Clinic, 2-7-14 Takachiho-dori, Miyazaki, 880-0812, Japan

    Naofumi Tanoue

  3. Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan

    Fukai Toyofuku & Junji Morishita

Authors
  1. Takuro Shiiba
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  2. Naofumi Tanoue
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  3. Shinji Tateoka
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  4. Masaji Maeda
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  5. Fukai Toyofuku
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  6. Junji Morishita
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Correspondence to Takuro Shiiba.

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Shiiba, T., Tanoue, N., Tateoka, S. et al. Effects of ambient-light correction in luminance measurements of liquid-crystal display monitors by use of a telescopic-type luminance meter. Radiol Phys Technol 3, 65–69 (2010). https://doi.org/10.1007/s12194-009-0078-x

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  • DOI: https://doi.org/10.1007/s12194-009-0078-x

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