Quantitative Evaluation of Luminance Nonuniformity  Mura  in LCDs Based on Just Noticeable Difference (JND) Contrast at Various Background Luminances

Tohru TAMURA; Toshifumi SATOH; Takayuki UCHIDA; Takashi FURUHATA

doi:10.1093/ietele/e89-c.10.1435

Quantitative Evaluation of Luminance Nonuniformity "Mura" in LCDs Based on Just Noticeable Difference (JND) Contrast at Various Background Luminances

Tohru TAMURA, Toshifumi SATOH, Takayuki UCHIDA, Takashi FURUHATA

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An analytical approach using human perception has been applied to the evaluation of the front-of-screen (FOS) quality of liquid crystal displays (LCDs), particularly regarding the regions of luminance nonuniformity called "muras." The accurate and consistent inspection of muras is extremely difficult because muras have various shapes and sizes as well as contrasts. And inspection results tend to depend on inspectors during the LCD manufacturing process. To determine the quantitative scale that shows the evaluation results of mura matching human perceptions, first, we conducted a perception test and clarified the "just noticeable difference" (JND) contrast according to the type of mura. Second, the relationship between the JND contrast of mura and background luminance was investigated. Finally, we proposed a quantitative scale of mura level on the basis of the JND contrasts at various background luminances. In this paper, we describe our research on human perception of muras at various background luminances and an approach to determining the quantitative scale of visible muras.

Publication: IEICE TRANSACTIONS on Electronics Vol.E89-C No.10 pp.1435-1440

Publication Date: 2006/10/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e89-c.10.1435

Type of Manuscript: Special Section INVITED PAPER (Special Section on Electronic Displays)

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Tohru TAMURA, Toshifumi SATOH, Takayuki UCHIDA, Takashi FURUHATA, "Quantitative Evaluation of Luminance Nonuniformity "Mura" in LCDs Based on Just Noticeable Difference (JND) Contrast at Various Background Luminances" in IEICE TRANSACTIONS on Electronics, vol. E89-C, no. 10, pp. 1435-1440, October 2006, doi: 10.1093/ietele/e89-c.10.1435.
Abstract: An analytical approach using human perception has been applied to the evaluation of the front-of-screen (FOS) quality of liquid crystal displays (LCDs), particularly regarding the regions of luminance nonuniformity called "muras." The accurate and consistent inspection of muras is extremely difficult because muras have various shapes and sizes as well as contrasts. And inspection results tend to depend on inspectors during the LCD manufacturing process. To determine the quantitative scale that shows the evaluation results of mura matching human perceptions, first, we conducted a perception test and clarified the "just noticeable difference" (JND) contrast according to the type of mura. Second, the relationship between the JND contrast of mura and background luminance was investigated. Finally, we proposed a quantitative scale of mura level on the basis of the JND contrasts at various background luminances. In this paper, we describe our research on human perception of muras at various background luminances and an approach to determining the quantitative scale of visible muras.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e89-c.10.1435/_p

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@ARTICLE{e89-c_10_1435,
author={Tohru TAMURA, Toshifumi SATOH, Takayuki UCHIDA, Takashi FURUHATA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Quantitative Evaluation of Luminance Nonuniformity "Mura" in LCDs Based on Just Noticeable Difference (JND) Contrast at Various Background Luminances},
year={2006},
volume={E89-C},
number={10},
pages={1435-1440},
abstract={An analytical approach using human perception has been applied to the evaluation of the front-of-screen (FOS) quality of liquid crystal displays (LCDs), particularly regarding the regions of luminance nonuniformity called "muras." The accurate and consistent inspection of muras is extremely difficult because muras have various shapes and sizes as well as contrasts. And inspection results tend to depend on inspectors during the LCD manufacturing process. To determine the quantitative scale that shows the evaluation results of mura matching human perceptions, first, we conducted a perception test and clarified the "just noticeable difference" (JND) contrast according to the type of mura. Second, the relationship between the JND contrast of mura and background luminance was investigated. Finally, we proposed a quantitative scale of mura level on the basis of the JND contrasts at various background luminances. In this paper, we describe our research on human perception of muras at various background luminances and an approach to determining the quantitative scale of visible muras.},
keywords={},
doi={10.1093/ietele/e89-c.10.1435},
ISSN={1745-1353},
month={October},}

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TY - JOUR
TI - Quantitative Evaluation of Luminance Nonuniformity "Mura" in LCDs Based on Just Noticeable Difference (JND) Contrast at Various Background Luminances
T2 - IEICE TRANSACTIONS on Electronics
SP - 1435
EP - 1440
AU - Tohru TAMURA
AU - Toshifumi SATOH
AU - Takayuki UCHIDA
AU - Takashi FURUHATA
PY - 2006
DO - 10.1093/ietele/e89-c.10.1435
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E89-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2006
AB - An analytical approach using human perception has been applied to the evaluation of the front-of-screen (FOS) quality of liquid crystal displays (LCDs), particularly regarding the regions of luminance nonuniformity called "muras." The accurate and consistent inspection of muras is extremely difficult because muras have various shapes and sizes as well as contrasts. And inspection results tend to depend on inspectors during the LCD manufacturing process. To determine the quantitative scale that shows the evaluation results of mura matching human perceptions, first, we conducted a perception test and clarified the "just noticeable difference" (JND) contrast according to the type of mura. Second, the relationship between the JND contrast of mura and background luminance was investigated. Finally, we proposed a quantitative scale of mura level on the basis of the JND contrasts at various background luminances. In this paper, we describe our research on human perception of muras at various background luminances and an approach to determining the quantitative scale of visible muras.
ER -