Thermal Modeling of Organic Light-Emitting Diode Display Panels

Sure, Anita; Sarma, Kalluri R.; Paramanandam, Karthikeyan; Desai, Raghuveer H.; Mukherjee, Animesh; Baranwal, Vaibhav; Asokan, S.

doi:10.1109/jdt.2015.2443127

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…Ambient temperature T can cause significant luminance degradation as well as lifetime reduction by affecting the OLED heat dissipation . The relationship between n and T should be obtained to estimate the luminance degradation accurately at different ambient temperature.…”

Section: Temperature‐related Equivalent Lifetime Methodsmentioning

confidence: 99%

“…Ambient temperature T can cause significant luminance degradation as well as lifetime reduction by affecting the OLED heat dissipation. 33 The relationship between n and T should be obtained to estimate the luminance degradation accurately at different ambient temperature. The ambient temperature was set at 25°C, 45°C, and 80°C, and corresponding luminance degradation curves were measured and fitted to obtain the parameters β, K, and n shown in Table 1.…”

Section: Tmentioning

confidence: 99%

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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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Section: Temperature‐related Equivalent Lifetime Methodsmentioning

confidence: 99%

Section: Tmentioning

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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“…Indeed, it was found previously that the temperature distribution across an OLED display is non-uniform, time-varying and a function of the image content [4]- [11]. Considering on the one hand the relationship between temperature and the intensity of the light emission of an OLED [12]- [17] and on the other hand the influence of temperature on the TFT characteristic [18]- [21], the thermal behavior of an OLED display has a direct impact on the picture quality.…”

Section: Introductionmentioning

confidence: 97%

Influence of Temperature on the Steady State and Transient Luminance of an OLED Display

Chesterman

Piepers

Kimpe

et al. 2016

J. Display Technol.

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Abstract-In this paper, the influence of temperature on the luminance of an organic light-emitting device (OLED) display is investigated. Luminance, temperature, and power measurements are executed on a 55-in white-red-green-blue active-matrix OLED display with a resolution of 1920 × 1080 and an oxide-thin-filmtransistor (TFT) backplane, under a controlled, static temperature environment. The measurements indicate a strong influence of temperature on the luminance of the display, resulting from the temperature dependence of both the TFT and the OLED. The influence of temperature on the luminance of an OLED display is also investigated in a dynamic context. Measurements show that temperature changes resulting from losses in the display have an important influence on the luminance stability of the display. The measurements linking luminance and temperature in a static temperature environment allow estimating the change in luminance in a dynamic context. Finally, this paper presents the results of a number of experiments that were set up to show scenarios in which the temperature dependence of the display's luminance has a direct negative impact on the picture quality of the display. The results of this work show that the thermal behavior of an OLED display must be taken into account when working towards a high-performing OLED display.

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“…When it is used as an OLED packaging material, it can block the penetration of moisture and oxygen from the external environment [ 11 ]. It is not necessary to attach a moisture-absorbent material in the OLED package, and the device is able to exist in conditions of high temperature and high humidity (85 °C/85% RH) for more than 7000 h [ 12 ]. The glass frit glue coating can be made by using a screen-printing or dispenser method in which the glass packaging cover is coated, and then the packaging glass cover and the vapor-deposited OLED-related materials are covered in a nitrogen-filled environment.…”

Section: Introductionmentioning

confidence: 99%

Hermetic Seal of Organic Light Emitting Diode with Glass Frit

Chiu

Lin

2021

Molecules

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The components of OLED encapsulation with hermetic sealing and a 1026-day lifetime were measured by PXI-1033. The optimal characteristics were obtained when the thickness of the TPBi layer was 20 nm. This OLED obtained a maximum luminance (Lmax) of 25,849 cd/m2 at a current density of 1242 mA/cm2, an external quantum efficiency (EQE) of 2.28%, a current efficiency (CE) of 7.20 cd/A, and a power efficiency (PE) of 5.28 lm/W. The efficiency was enhanced by Lmax 17.2%/EQE 0.89%/CE 42.1%/PE 41.9%. The CIE coordinates of 0.32, 0.54 were all green OLED elements with wavelengths of 532 nm. The shear strain and leakage test gave results of 16 kgf and 8.92 × 10−9 mbar/s, respectively. The reliability test showed that the standard of MIL-STD-883 was obtained.

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Thermal Modeling of Organic Light-Emitting Diode Display Panels

Cited by 5 publications

References 8 publications

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

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

Influence of Temperature on the Steady State and Transient Luminance of an OLED Display

Hermetic Seal of Organic Light Emitting Diode with Glass Frit

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