Long-Term Reliability Characteristics of OLED Panel and Luminaires for General Lighting Applications

Jeungmo Kang,Yoonhee Cho,Woojin Jang

doi:10.3390/app11010074

Abstract

Organic light-emitting diode is one of the future-proof solid-state-based lighting sources. OLED shows great aesthetic advantages and good color quality without glare. Moreover OLED is a kind of surface light sources naturally. There are some studies on the long-term reliability characteristics of OLED light source. However, these studies focused on the light output degradation of OLED light sources mainly. In this paper, we have investigated the long-term reliability characteristics of OLED panel and luminaires in terms of lumen maintenance, correlated color temperature, color rendering index, and operating voltage. Total twelve OLED panels with four different kinds and six OLED luminaires with two different kinds were analyzed up to six thousand hours and analyzed for the general lighting applications.

Highlights

After the invention of blue light emitting diode (LED), most of the conventional lighting sources for general lighting applications are replaced by LED-based light sources.LED-based light sources have advantages to the conventional ones in terms of guaranteed longer life, lower power consumption, higher brightness, and less harmfulness for the environment [1,2,3,4]
We have investigated long-term reliability characteristics of Organic light-emitting diode (OLED) panel and luminaries in terms of maintained optical and electrical characteristics such as lumen output, correlated color temperature (CCT), color rendering index (CRI), and operating voltage
We have investigated the various long-term reliability characteristics of OLED products in terms of lumen output, luminous efficacy, CCT, CRI, and operating voltage for the general lighting applications

Summary

Introduction

After the invention of blue light emitting diode (LED), most of the conventional lighting sources for general lighting applications are replaced by LED-based light sources. LED-based light sources have advantages to the conventional ones in terms of guaranteed longer life, lower power consumption, higher brightness, and less harmfulness for the environment [1,2,3,4]. Heat generated from the junction in light emitting diode chip must be managed properly to prevent over-heating, which may damage the chip and/or cause degradation of materials in the package. As more light is produced from the high-power LED, industries keep developing more efficient heat-dissipating materials. Some are concerned about the use of high-power LED light sources which may raise potential risk to human health because of the blue spectrum from the LED [5]. LED itself is a kind of point light source; the glare of LED light source is another problem

Methods

Results

Discussion

Conclusion