A Modular and Interactive OLED-Based Lighting System

Monté, Ann; Kundrata, Jurica; Schram, Jeroen; Cauwe, Maarten; Barić, Adrijan; Doutreloigne, Jan

doi:10.1080/15502724.2017.1283234

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…As a result of tristability, a large-area OLED is prone to switching phenomena that cannot even be prevented by current-stabilized operation, as widely applied. [13,32,33]…”

Section: Introductionmentioning

confidence: 99%

Electrothermal Tristability Causes Sudden Burn‐In Phenomena in Organic LEDs

Kirch

Fischer

Liero

et al. 2021

Adv Funct Materials

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Organic light-emitting diodes (OLEDs) have been established as a mature display pixel technology. While introducing the same technology in a largearea form factor to general lighting and signage applications, some key questions remain unanswered. Under high-brightness conditions, OLED panels were reported to exhibit nonlinear electrothermal behavior causing lateral brightness inhomogeneities and even regions of switched-back luminance. Also, the physical understanding of sudden device failure and burn-ins is still rudimentary. A safe and stable operation of lighting tiles, therefore, requires an in-depth understanding of these physical phenomena. Here, it is shown that the electrothermal treatment of thin-film devices allows grasping the underlying physics. Configurations of OLEDs with different lateral dimensions are studied as a role model and it is reported that devices exceeding a certain panel size develop three stable, self heating-induced operating branches. Switching between them causes the sudden formation of dark spots in devices without any preexisting inhomogeneities. A currentstabilized operation mode is commonly used in the lighting industry, as it ensures degradation-induced voltage adjustments. Here, it is demonstrated that a tristable operation always leads to destructive switching, independent of applying constant currents or voltages. With this new understanding of the effects at high operation brightness, it will be possible to adjust driving schemes accordingly, design more resilient system integrations, and develop additional failure mitigation strategies.

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“…As a result of tristability, a large-area OLED is prone to switching phenomena that cannot even be prevented by current-stabilized operation, as widely applied. [13,32,33]…”

Section: Introductionmentioning

confidence: 99%

Electrothermal Tristability Causes Sudden Burn‐In Phenomena in Organic LEDs

Kirch

Fischer

Liero

et al. 2021

Adv Funct Materials

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Radiated Emissions of an Array of OLED Luminaries

Kundrata

Barić

2018

IEEE Trans. Electromagn. Compat.

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Advanced luminaire using 3D-printed electronics

Avuthu,

Mehta,

Modi

et al. 2023

3D Printing for Lighting

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In recent years, there has been an increasing demand for use of advanced luminaires in multitude of applications such as residential & commercial buildings, industrial facilities, and public spaces. These lighting fixtures are designed to provide better illumination, higher energy efficiency, and greater flexibility than traditional lighting systems. Due to the design complexity of these lighting structures, traditional methods of manufacturing are not able to keep up with the demand for customization and innovation. 3D printed electronics can bridge the gap between design and manufacturing, enabling designers and engineers to create advanced lighting fixtures with integrated sensors, wireless communication, and other advanced features. The luminaire that has been manufactured through this effort has been fabricated using 3D printing processes Including electrically conductive inks to print the circuit for illumination and sensing capabilities. Surface Mount Technology (SMT) and supporting electronics has been attached to the printed traces. Light Emitting Diodes (LEDs) have been mounted on multiple angles to study the effect on efficiency of the luminaire.

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A Modular and Interactive OLED-Based Lighting System

Cited by 3 publications

References 7 publications

Electrothermal Tristability Causes Sudden Burn‐In Phenomena in Organic LEDs

Electrothermal Tristability Causes Sudden Burn‐In Phenomena in Organic LEDs

Radiated Emissions of an Array of OLED Luminaries

Advanced luminaire using 3D-printed electronics

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