Smart Solid-State Lighting Control 1cm Steuerung eines Intelligenten Belichtungssystems mit LED Lichtquellen, RWTH Aachen

General illumination using LEDs has enabled designers to have precise control of the intensity and color of an illuminated area. In this work, I investigate how these systems can dynamically adjust to create optimal lighting conditions in the built environment. By incorporating environmental feedback into a system control loop, i.e., illuminance or luminance measurements, the precise intensity and color temperature can be generated for an area of interest. According to the International Energy Agency, 19% of global electricity consumption is due to lighting. Closed-loop solid state lighting technology enables significant power and emission savings. Applications for smart lighting control include large scale office lighting systems, private household lighting, or even theater installations. Presented in this work is a new approach to optimal lighting control. Unlike previous research that studied constant illuminance, I investigate the incorporation of control elements such as color temperature and color rendering index. In this manner, the control system not only balances lighting intensity and energy, but also attempts to balance acceptable lighting quality. Using online light signal calibration, there is no need for user localization. Two feedback methods are investigated: illuminance lux feedback using an environmental sensor and luminance feedback using a commercial webcam. A testbed is built that enables evaluation and demonstration of the control system. Three short-term user studies show the energy saving potential and the user experience of the test system.