Color Essentials in LED Lighting Systems
Instructor: Michael J. Murdoch, Rochester Institute of Technology
Level: Intermediate
Duration: 2 hours plus 15 minute break.  After the class, adjourn to Zoom to join the instructor and other students in a discussion of the class.
Course time:
    New York: Wednesday 11 November, 12:45-15:00
    Paris: Wednesday 11 November, 18:45-21:00
    Tokyo: Thursday 12 November, 02:45-05:00

Benefits:
Attendees will be able to:

• Identify and compare LED color architectures, including phosphor-converted blue pump, 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
• Evaluate the melanopic and chronobiological responses, related to circadian rhythms, of spectral power distributions of light.

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.

Course Description:
Everybody knows 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 is now dominant in general illumination, commercial applications, and in 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 sources, maximize fidelity or preference for object color rendition, and to 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.

Michael Murdoch is an assistant professor in RIT's Munsell Color Science Laboratory, where he teaches psychophysical methods, MATLAB, 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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