Color Essentials in LED Lighting Systems
Instructor: Michael J. Murdoch, Rochester Institute of Technology
Level: Intermediate
Duration: 2 Hours
Course Time: 
     New York: 21 October 2021, 18:30 - 20:45
     Paris: 22 October 2021, 00:30 - 02:45
     Tokyo: 22 October 2021, 07:30 - 09:45

Prerequisites: Familiarity with basic colorimetry and linear algebra.

Benefits:
Attendees will be able to:

• Identify and compare LED color architectures, including phosphor-converted blue pump (PC-white), tunable white, RGB, RGBA, and other addressable multiprimary systems.
• Understand important characteristics of light: luminous flux, intensity distribution, color, CCT, and color rendition.
• Evaluate color rendition, or how spectral characteristics of "white" LEDs affect rendered object colors and what this means for perceived naturalness and preference.
• Compare color rendition measures including CIE Ra, CIE Rf, and TM-30 Rf/Rg.
• Compute composite spectral power distributions from discrete LEDs to meet colorimetric aims and additional optimization goals.
• Evaluate the melanopic and chronobiological responses, related to circadian rhythms, of spectral power distributions of light.

Course Description
You probably know that color perception requires an observer, an object, and a light source, but how much do you know about light-emitting diodes (LEDs), how they make "white" light, and how much they can affect object colors? LED technology now dominates general illumination, commercial applications, and special applications like cinematography. LED systems are also excellent tools for imaging and vision research. Through phosphor combinations and multichannel systems, spectral characteristics can be tuned to mimic standard illuminants; maximize fidelity, naturalness, or preference for object color rendition; and influence circadian rhythms. This course explains and shows many examples of the essential characteristics of color, color rendition, chronobiology, and quality of light in solid-state (LED and OLED) lighting.

Intended Audience: scientists, engineers, and students using LED lighting systems for research, image capture, or image/product evaluation, and anyone who wants to know more about characteristics of quality LED and OLED lighting.

Michael Murdoch is an associate professor in RIT's Munsell Color Science Laboratory, where he teaches colorimetry, imaging, and lighting topics. His research addresses temporally dynamic lighting, perception of advanced displays, and color appearance in augmented reality. Murdoch's experience with color perception and color system design includes industrial research at Kodak Research and Philips Research as well as his education at Cornell, Rochester Institute of Technology, and Eindhoven University of Technology.

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