RPI ID: 2020-069-301, 2020-069-401
Innovation Summary: This technology introduces a system and method for reducing temporal light artifacts (TLAs) during LED dimming operations. It utilizes a driving circuit that applies a non-linear dimming curve—such as exponential, cycloid, or cosine—over a short duration (≤1 second) to ensure smooth and imperceptible light transitions. The system calculates instantaneous rates of change using the W-i branch of the Lambert W function to stay below human perceptibility thresholds. The driving circuit includes components like a rectifier, voltage sensor, voltage-to-frequency converter, and power supply modulator to execute the dimming algorithm.
Challenges / Opportunities: Traditional dimming curves often result in flicker or TLAs, especially at low brightness levels where human sensitivity is heightened. This technology addresses the challenge of maintaining smooth dimming transitions without perceptible artifacts. It offers an opportunity to enhance user experience in lighting environments requiring precise control, such as healthcare, hospitality, and residential settings. The approach also opens avenues for integrating advanced mathematical modeling into lighting control systems.
Key Benefits / Advantages: ✔ Eliminates perceptible flicker and TLAs during dimming ✔ Supports multiple non-linear dimming curves (exponential, cycloid, cosine) ✔ Enables smooth transitions even at low brightness levels ✔ Uses advanced mathematical modeling for precision control ✔ Compatible with standard LED light sources ✔ Fast dimming response (≤1 second)
Applications: • Smart lighting systems in residential, commercial, and healthcare environments
Keywords: LED dimming, temporal light artifacts, non-linear control, Lambert W function, flicker reduction, lighting systems
Intellectual Property:
Patent Application No. PCT/US2023/032599 published, Patent Application No. U.S. 19/111023 filed