P‐188L: <i>Late‐News Poster</i>: Quantification of Image Sticking for Images with Different Long‐Range Non‐Uniformity

Shin, Dong-Hyeon; Woo, Jong-Kwan; Hong, Yongtaek; Kim, Suhwan; Kim, Keum-Nam; Kim, Do-Ik; Yoo, Myoung-Hwan; Kim, Hye‐Dong

doi:10.1889/1.3256561

Cited by 1 publication

(2 citation statements)

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“…The scaled reference value for the block in the m-th row and n-th column, S m,n , is expressed as (13) where µ L is the mean of L m,n and µ R is the mean of R m,n . Then the normalized luminance can be redefined as follows: (14) For the 12 examples provided by images A, B, and C, each aged for four different lengths of time, the µ NL of the redefined normalized luminance is always unity with an error less than 0.0004. When µ NL is unity, the RSD reduces to σ NL .…”

Section: Resultsmentioning

confidence: 99%

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Quantitative evaluation of image sticking on displays with different gradual luminous variation

et al. 2010

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Abstract— To comparatively evaluate various driving methods of an electronic display in respect to image sticking, a consistent and reliable quantification method is required. For proper evaluation, the entire area of a display is often monitored by using a chessboard pattern, and long‐range gradual luminous variation in the background is eliminated. Estimation in terms of a single number is also preferred for simple comparison of image sticking. However, the prior method that uses the initial luminance for normalization and estimates the range‐to‐maximum ratio is not well‐suited for the driving methods that relieve image sticking by restoring luminance uniformity. We have developed a method of extracting reference values for normalization and introduced the relative standard deviation (RSD) into our estimation. The resulting method is insensitive to the temporal change in the long‐range gradual luminous variation and sufficiently indicative to allow driving methods to be compared effectively. The reference extraction method and the indicative capability of the RSD have been assessed by experiments using a real active‐matrix organic light‐emitting‐diode (AMOLED) display cell.

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Section: Resultsmentioning

confidence: 99%

“…In this paper, we have analyzed our initially introduced evaluation method, 14 where we have developed a new set of reference values which can be used to remove the long-range non-uniformity (LRNU) without regard to the previous state of a display device. These new reference values are extracted from a set of measured luminance values.…”

Section: Introductionmentioning

confidence: 99%