Retrofit LED lighting system for replacement of fluorescent lamp
View Patent ↗A 4 pin LED retrofit lamp for replacement of socket fitted CFL lamp driven by fluorescent ballast is provided. The retrofit lamp comprises a plurality of LEDS in connection with the fluorescent ballast. The circuit of the lamp comprises a bridge rectifier that converts the AC waveform into DC and a capacitor to filter the resulting waveform.
1. A retrofit LED lamp for replacing a socket type CFL lamp driven by a ballast, the said lamp comprising:
a string of LED mounted on a MCPCB plate with an output angle perpendicular to the MCPCB horizontal axis;
a housing that serves as a mean for dissipating the heat generated by LED;
a diffuser placed over the MCPCB plate to diffuse the light emitted by LED, the said diffuser and the MCPCB plate are fitted to the housing through a screw;
a PCB circuit to provide the voltage input to the string of LED, the said PCB circuit comprises a bridge rectifier made of schottky diode and a capacitor in parallel to the bridge rectifier;
a plug having a plurality of pins protruding from the plug, the said plug provide electrical communication to the PCB circuit with the output of the ballast.
2. The retrofit LED lamp of claim 1 wherein the ballast is a fluorescent ballast, or an electronic ballast, or a electromagnetic ballast.
3. The retrofit LED lamp of claim 1 wherein the MCPCB plate is fabricated from material consisting of aluminum alloy or dielectric polymer.
4. The retrofit LED lamp of claim 1 wherein the diffuser is made from composite material of polymer and glass fiber, or from a polycarbonate/acrylic material.
5. The retrofit LED lamp of claim 1 wherein the diffuser prevents the LED strings from getting visible, enhancing the aesthetic value.
6. The retrofit LED lamp of claim 1 wherein the housing is fabricated from the material consisting of aluminum, copper, thermoplastic material, or natural graphite.
7. The retrofit LED lamp of claim 1 wherein the input to the PCB circuit is provided by the ballast.
8. The retrofit LED lamp of claim 1 wherein the schottky diode compensate the high speed waveform produced by ballast.
9. The retrofit LED lamp of claim 1 wherein the capacitor filters the ripple current.
10. The retrofit LED lamp of claim 1 wherein the said plug is rotatable on the horizontal axis of the lamp.
11. The retrofit LED lamp of claim 1 wherein the plug is designed to fit into G24q, GX24q, G24d, GX24d, G-23, GX23, GX32d-2, GX32d-3 type socket.