P‐195: Equivalent Lifetime Method to Improve OLED Luminance Degradation

Fan, Rui; Zhang, Xiaoning; Tu, Zhentao; Hwang, Taijun; Fu, Jianhang; Lu, Po‐Yen; Jou, Ming-Jong

doi:10.1002/sdtp.12056

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…The external compensation, [4][5][6] using extra sensing circuits to detect the electrical characteristics and to access the OLED degradation status, has technical challenges in achieving for the reliable data from low level signal and in managing side effects caused by the complicated sensing circuit operation. On the other hand, the data-counting methods [7][8][9][10] could be simple without the sensing analog circuitry, but the accuracy is limited due to panel-to-panel characteristic deviation. Nevertheless, these are realistic alternatives for the mobile devices designed in a cost-effective manner.…”

Section: Introductionmentioning

confidence: 99%

A multiunit compensation for organic light‐emitting diode burn‐in in mobile displays

et al. 2021

J Soc Info Display

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In this paper, a cost-effective organic light-emitting diode (OLED) display burn-in compensation method on a mobile system is proposed. The subpixel wise compensation map is estimated using the data-counting approach and is reallocated to multiunit regional map according to amount of burn-in details.The degraded luminance compensation is applied for the display driver integrated circuit (IC) without the additional external storage. With the optimized multiunit map, perceptual quality can be enhanced after compensation with limited internal memory. Experiment shows that the luminance uniformity of the degraded panel has been improved by 20% after proposed compensation with 1/16 memory space usage.

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Section: Introductionmentioning

confidence: 99%

A multiunit compensation for organic light‐emitting diode burn‐in in mobile displays

et al. 2021

J Soc Info Display

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“…[25][26][27][28] Luminance degradation estimation is the precondition of OLED lifetime extension 29 without external or internal compensation circuits. However, the influence of ambient temperature on equivalent lifetime of OLED was neglected, 30 which cause inaccurate parameters estimation of luminance degradation model at variable ambient temperature.…”

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confidence: 99%

Influence of ambient temperature on OLED lifetime and uniformity based on modified equivalent lifetime detection

Fan

Zhang

2019

J Soc Info Display

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The ambient temperature can affect the OLED heat dissipation and aggravate the luminance degradation. Based on temperature‐related equivalent lifetime detection, a luminance compensation algorithm without internal or external sensing circuits is proposed and the influence of ambient temperature on lifetime and display uniformity is studied. First, the parameters of luminance degradation curves at any ambient temperature are calculated according to the relationship between accelerate degradation factor n and ambient temperature T, which is determined by the measured luminance degradation curves at ambient temperature 25°C, 45°C, and 80°C. Second, luminance compensation is carried out by increasing drive current according to the estimated luminance degradation influenced by temperature. Furthermore, compensation iterations m, compensation goal value Lgoal, and compensation origin value Lorigin are optimized to obtain a better lifetime extension at different ambient temperature. The simulated and experimental results indicate that the lifetime extensions considering the influence of ambient temperature at 0°C, 25°C, 45°C, 60°C, and 80°C are 29.7%, 28.1%, 18.7%, 18.9%, and 11.6%. Meanwhile, after displaying an image of the International Electrotechnical Commission (IEC) 62087 for 90 hours, the luminance uniformity of OLED increase to 96.0%, 94.0%, 97.2%, 97.2%, and 98.6%, which is a significant improvement compared with it of regardless the influence of the ambient temperature.

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P‐13.6: The Improvement of OLED Image Sticking Based on Motion Detection

Sun

Fan

Wang

et al. 2018

Symp Digest of Tech Papers

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An improvement method of OLED image sticking based on motion detection without additional circuit units is proposed. Images are divided into static images, mixed images, and moving images by comparing the image luminance among different frames. In this method, the static image is moved and its luminance is reduced. As for the mixed image, its luminance is reduced by varying proportions in different areas. When it is a moving image, the luminance of pixels is reduced. The simulation results show that the improvement can effectively improve OLED image sticking by using the image sticking evaluation method proposed. As for static images, the improvement percentage is 55.05%. When it comes to mixed images, the improvement in static areas is 14.29% and it is 3.29% in motion areas. As for moving images, the improvement percentage is 7.35%.

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P‐195: Equivalent Lifetime Method to Improve OLED Luminance Degradation

Cited by 4 publications

References 6 publications

A multiunit compensation for organic light‐emitting diode burn‐in in mobile displays

A multiunit compensation for organic light‐emitting diode burn‐in in mobile displays

Influence of ambient temperature on OLED lifetime and uniformity based on modified equivalent lifetime detection

P‐13.6: The Improvement of OLED Image Sticking Based on Motion Detection

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