Patent ID: 9169978
Filing Date: 2015-10-27
Classification: F21K,F21Y,H05B,Y02B

Abstract:
1. An intelligent light emitting diode lamp tube compatible to a T5/T8 electronic ballast, comprising a tube body having two electrodes, a circuit board disposed in the tube body to respectively connect to the two electrodes of the tube body and including two prestartup circuits connected to a rectification circuit that is connected to an integrated circuit, and at least one light emitting diode lamp string respectively connected to the rectification circuit and the integrated circuit, characterized in that a selection circuit provided with a first end that is connected to the light emitting diode lamp string and a second end that is capable of connecting to a switch member having one end connected to the integrated circuit comprises at least one first conduction loop and at least one second conduction loop, in which the first conduction loop is provided with a first end connected to the light emitting diode lamp string and a second end connected to the integrated circuit via the switch member, and the second conduction loop configured with an inductor is provided with a first end connected to the light emitting diode lamp string and a second end connected to the integrated circuit via the switch member, so that the intelligent light emitting diode lamp tube compatible to the T5/T8 electronic ballast is able to conduct the selection circuit and the switch member via the integrated circuit in accordance with voltage and current signal and internal operation when being connected to a self-oscillating electronic ballast or an IC-controlled electronic ballast, allowing the current to flow past the first conduction loop or the second conduction loop to thus attain efficacies of changing resonant frequency and reducing power consumption.