Double ended retrofit light emitting diode, led, based lighting device for connection to a power source, which led based lighting device having an improved pin-safety circuit

Abstract

A double ended retrofit LED lighting device having two connecting terminals (L, L) at a first end for connection to a power source and two further connecting terminals (R, R) at a second end for further connection to said power source, the LED lighting device comprising: —at least one LED (D) for emitting light, —an LED driver arranged for receiving an AC current from said power source and for driving said at least one LED based on said received AC current, —a filament circuit (RfilL) connected between said two connecting terminals (L, L) for supporting a filament current circulating back to said power source for indicating a presence of said LED lighting device to said power source, and—a pin-safety circuit comprising two pin-safety switches (SwLa, SwLb), wherein each pin-safety switch is connected to a respective separate terminal of said two connecting terminals (L, L) and comprises a changeover contact, wherein said changeover contact comprises: —a central node (CC) arranged to be connected to said power source; —a normally-closed node (NC) arranged to be connected to said filament circuit (RfilL); —a normally-open node (NO) arranged to be connected to said LED driver, such that said filament circuit (RfilL) is functionally disconnected, when said AC current flows to, or from, said LED driver.