Flexible lighting device

Abstract

Disclosed is a flexible multi-layered linear LED lighting device designed for uniform radial illumination and improved mechanical durability. The device includes a flexible chip-on-board (COB) LED string mounted on a clear polymer substrate with photo-etched copper cladding, over-molded with a clear silicone coating. A light-diffusing polymer jacket surrounds the LED string and a thin-gauge electrical return wire to promote high light transmission and uniform illumination. A UV-stabilized cylindrical outer sleeve is loosely positioned over the polymer jacket to protect against abrasion and impact while maintaining axial flexibility. The lighting device further incorporates a mounting assembly comprising a molded plastic base cap and a stainless steel tension spring forming a semi-rigid bridge to a mounting end cap. Electrical power is provided via stranded input wiring terminated with a connector and regulated by an inline DC-DC buck converter configured to accept input voltages from approximately 4.0 VDC to 15 VDC.