Near unity power factor long life low cost led lamp retrofit system and method

Abstract

Disclosed are various embodiments of low cost high quality LED (Light Emitting Diode) retrofit lamp devices capable of operating in a wide range of power and to supersede conventional lighting devices such as incandescent, halogen, sodium or fluorescent lamps. The disclosed embodiments include various LED lamp retrofit apparatuses that maximize the electro-mechanical-optical compatibility of seven interactive systems, such as: LEDs, LED Panel, Supply Adaptor, Housing, Lens/diffuser Shield, In/Out Electrical Wiring an LED driver. LED lamp retrofit apparatuses include incandescent, halogen, fluorescent, and sodium lamps. Drivers for such LED retrofit lamps include alone or in combination is double stage boost—isolated flyback, single stage boost, no opto-coupler isolated flyback, single stage single ground flyback, single stage constant off time buck-boost, single stage single ground self-supply buck-boost, pseudo double stage boost-isolated flyback, pseudo double stage boost—non isolated flyback, pseudo double stage boost—COT buck-boost, pseudo double stage boost—SG buck-boost, series circuit monolithic, parallel circuit monolithic, single cell anode loaded voltage controlled limited current switch (VCLCsw), single cell cathode loaded voltage controlled limited current switch (VCLCsw), overall feedback series monolithic circuit, overall feedback parallel monolithic circuit, monolithic multi stripes, high reliability series monolithic circuit, minimum parts series monolithic circuit, minimum parts parallel monolithic circuit, 120 Vac series monolithic circuit, simplified series monolithic circuit, simplified parallel monolithic circuit, monolithic diodes source feedback parallel circuit, operational amplifier (OPAM) monolithic parallel circuit, diodes gate feedback monolithic parallel circuit, resistor gate feedback monolithic parallel circuit, according to one embodiment, totem pole feedback monolithic parallel circuit, monolithic 8 Pin DC chip, and monolithic 8 Pin AC chip.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Patent Application No. 61 / 576,604, filed December 16, 2011 (patent titled "NEAR UNITY POWER FACTOR LONG LIFE LOW COST LED LAMP RETROFIT SYSTEM AND METHOD"), filed October 5, 2012 U.S. Provisional Patent Application No. 61 / 710,286, entitled "NEAR UNITY POWER FACTOR LONG LIFE LOW COST LED LAMP RETROFIT SYSTEM AND METHOD," which is hereby incorporated by reference in its entirety. technical field [0003] Various embodiments disclosed herein relate to low-cost, high-quality retrofit LED (Light Emitting Diode) light fixtures that operate over a wide range of wattages and can replace traditional lighting fixtures such as incandescent, halogen, sodium, or fluorescent lights. [0004] More specifically, various embodiments disclosed herein relate to an LED lamp retrofit device that maximizes electrical, mechanical, and optical compatibility of seven interactive systems, such as: LED, LED...

AI Technical Summary

Problems solved by technology

[0040] The main disadvantages of sodium gas lamps are: yellow light making them suitable for outdoor applications only, long warm-up/start-up time (minutes), need for a ballast unit (certain bulb types), large size, high heat loss, easy Fragile (not resistant to mechanical shock or vibration) and more expensive to manufacture

[0177] The buck circuit topology is quite efficient (typically, Eff = 85-90%) and cost-effective. The buck circuit topology also allows the circuit to have a lower component count. It has two main disadvantages:

[0191] The disadvantages of the flyback circuit are: more expensive; more components; larger size; lower efficiency (typically 75-85%, up to 90% with expensive components); two independent grounds, requiring a complex Differential current/voltage sensing circuit and an additional opto-coupling circuit in order to control the instantaneous value of the current and vo

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