Paper 12906-40
Paper 12906-40
Recent advances in red, blue, and green ultra high-power LEDs for étendue-limited applications
On demand | Presented live 31 January 2024 
Abstract
In this paper, we report the latest advances in light-emitting diodes (LEDs) of the three primary colors red, blue, and green optimized for ultra high-power operation to achieve highest luminance and radiance values. These kinds of LEDs are mainly used in étendue-limited applications, particularly projectors. For the three colors different material systems are used: AlInGaP for red and InGaN for blue and green, while green uses a blue chip combined with a green ceramic converter. The chip designs and epitaxies have been modified compared to lower power versions to withstand high current densities up 6.6 A/mm² for blue, up to 4.5 A/mm² for red. The LED chips have been optimized at this operating point. The latest improvements show an increase of 8% in luminance for red, 17% for green, and 15% in radiance for blue compared to the previous generation. The LEDs using the latest improvement measures are setting the benchmark for ultra high-power LED technology.
Presenter
ams-OSRAM International GmbH (Germany)
Dr. Benjamin Schulz is system solutions engineer and key expert in the business line Visualization & Sensing at ams OSRAM. In hin current position he focuses on high-power LEDs and lasers for étendue-limited systems (e.g. projection displays) and brigdes the gap between the R&D departments and external customers.
His expertise includes multi-domain system modeling and analysis, colorimetry and high-power LED measurement technology. Benjamin received his doctoral degree in Electrical Engineering from the Light Technology Institute at the Karlsruhe Institute of Technology (KIT) in 2018.