Search International and National Patent Collections

1. (WO2018040611) METHOD AND APPARATUS FOR RETROFITTING FLUORESCENT TUBE LAMPS TO LIGHT EMITTING DIODES

Pub. No.:    WO/2018/040611    International Application No.:    PCT/CN2017/083748
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu May 11 01:59:59 CEST 2017
IPC: H05B 33/08
Applicants: KWOK, Leo
YU, Simon Siu-Chi
Inventors: KWOK, Leo
YU, Simon Siu-Chi
Title: METHOD AND APPARATUS FOR RETROFITTING FLUORESCENT TUBE LAMPS TO LIGHT EMITTING DIODES
Abstract:
A multi-group brightness controllable LED tube comprises a multi-input source selector which directs electric power to the tube from a set of diversion switches inserted between a power source and preexisting ballast. The diversion switches automatically re-establish new electric current paths to supply the LED tube power and safely bypass the preexisting ballast. The LED tube also comprises a digital sub section selector for selecting two groups of SMD (surface mounted device) LED strip lights for intensity control. When first turned on, the light will be at 66%brightness. A first toggle action dims the light to 33%brightness, and a second toggle action brings it up to 100%. The third toggle will reset the LED tube to 66%brightness. The retrofitted LED tube is suitable for single end as well as double end fixtures without a complicated conversion process. Furthermore, fixtures can be reverted back to original fluorescent operation.