Dr. Jörg Knipping is a professional project manager with a 17 years’ experience in new product development and market introduction thereof. After he studied chemistry, he made his doctorate in engineering science in the field of nanoparticles, and entered the lighting industry at Philips Automotive Lighting as a development engineer and project leader. Jörg grew his career as a project manager for innovative Halogen and Xenon Automotive bulbs and changed later to the Philips Business Center OLED Lighting, where he focused more on the general lighting application. In his present role as Engineering Manager a.i. at OLEDWorks he is responsible for the development and factory engineering team.
Latest Technology Updates of Modern OLEDs for Lighting Application
Only a few years ago OLED (Organic Light Emitting Diodes) devices were too dim, had too low lifetime and too poor field reliability, and OLED production was only possible on lab scale equipment. In the past five years, OLED displays have rapidly evolved such that they fill a significant market share in the mobile devices and TV markets with clear signals for further rapid growth. In the same timeframe OLED lighting panels entered the market with performance levels only good enough for design and ambient light applications. The breakthrough for OLED lighting panels to meet functional lighting requirements took longer. Only within the past 3 years have commercial OLED lighting panels become available that emit enough luminous flux and have high enough lifetime and field robustness to be designed in for real functional lighting applications by lighting specifiers and luminaire makers.
In terms of performance, OLEDWorks’ high brightness OLEDs are the first and only OLED panels to deliver 300 lm from a 100 cm² lit area, while meeting a 10,000 h operational lifetime (LT70) and maintaining high field reliability. Being a true digital light source, OLEDs can be driven at a wide range of settings. Choosing a brightness setting of 100 lm from a 100 cm² lit area (3000 Cd/m²), OLED lifetime will be over 50,000 h, which in most applications results in a field usage of more than 10 years.
At this performance level OLEDs outperform conventional light sources, while only LEDs remain ahead in terms of a few technical performance measures. With low color shift over life and high color rendering (CRI > 90) OLEDs are on par with high CRI LEDs, and actually better than most LEDs on the market, but further lifetime improvement at high brightness is demanded, as well as continued improvements in efficacy. While modern LEDs show > 100 lm/W, commercial OLEDs currently range from 60 to 80 lm/W; however, this gap is expected to close rapidly within the next few years.