Dramatic Improvement in Driving LED Arrays through Resonant Control of Power

David_Dreyfus

David Dreyfuss

(Intervention Technology Pty Ltd)

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❏ Lecture Slides (Stanford)

❏ Lecture Slides (SystemX Members)

Date: March 9, 2016

Description:

Driver failures may represent more than half of the failures of LED luminaires, especially for higher outputs. Further, a single constant-current driver cannot regulate current throughout parallel columns of LEDs. A solution to these problems is presented using contra-connected pairs of LEDs or “couplets” which can be efficiently driven with AC power. Couplets can be further assembled into “reactive strings” where reactive elements (capacitors or inductors) are distributed throughout the string. Reactive strings can be driven as part of resonant tank circuits where damping is provided by the LEDs and resonance regulated the power. Near-lossless reactances control power both globally and locally. Resonance provides a passive power control mechanism that requires no active components. The distributed reactive elements allow power in each couplet to be independently regulated.

Further Information:

Dr. David Dreyfuss is Scientific Advisor, Patent Counsel, and North American Evangelist for Intervention Technology Pty Ltd (Victoria NSW Australia).  He is also a registered U.S. patent agent with Moore Patents in Palo Alto where he focuses on drafting and prosecuting patent applications for diverse clients.

David also has many years of experience as a senior entrepreneur and technologist with unusually broad-based multidisciplinary expertise in the physical sciences and engineering and experience in a broad range of settings and industries.  Starting from degrees in Physics and Gas Dynamics from MIT, he went on to teach Mechanical Engineering at Rutgers, develop automated inspection systems at PA Technology and DuPont, and develop printers and printing systems at PA, AM Graphics, Lexmark, and The Salmon Group.




Created: Thursday, March 10th, 2016