An External Compensation Technique for Burn-in Degradation in 30-inch Flexible AMOLED Display

Usui, Tomohiro; Okada, Takuya; Shimizu, Takahisa; Nakamura, Kazuo; Moriya, Masaaki; Katoh, Hiromi

doi:10.36463/idw.2021.0877

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2022

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“…Among them, in-pixel compensation circuits are unsuitable for large displays because they require more transistors, and the manufacturing process is complicated. External compensation circuits [7][8][9][10][11][12][13] are one appropriate method for large ultra-high-definition displays because they are comparatively simple pixel circuits and contain a limited number of transistors. Although they need complex signal processing, large displays, such as TVs, usually have a high-performance processor.…”

Section: Introductionmentioning

confidence: 99%

[Paper] Development of an External Compensation Technique for Burn-in Degradation in a 4K Flexible AMOLED Display

Usui¹,

Okada²,

Shimizu³

et al. 2022

MTA

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In ultra-high-definition active-matrix organic light-emitting diode (AMOLED) displays, the external compensation technique improves burn-in and uneven luminescence by varying the current through the driving thin-film transistors (TFTs). However, sensing the current through the driving TFT for every pixel is time-consuming because of the increased number of scanning lines. Hence, in this study, we propose a method to reduce the number of measurements and shorten the measurement time by interpolating from the current measurement data for surrounding pixels. We show that this method can be applied to a 4K flexible AMOLED display and can satisfactorily compensate degradation due to burn-in.

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