| 摘要 |
<p>A driver circuit for lighting sources (D1-D6), in particular LED, comprising at least a first and a second lighting branch (A, B, C) connected in parallel between two power supply terminals, each of said first and second lighting branches comprising one or more lighting sources (D1, D2; D3, D4; D5, D6) connected together in series. A plurality of lighting switching elements (TLEDA, TLEDB, TLEDC), each suitable for driving a respective lighting branch, susceptible to operating in a first state of nominal functioning and in a different second state of functioning. The circuit also comprises control means (30) for controlling said lighting switching elements, so as to force said lighting switching elements to operate in said first state of nominal functioning.</p> |
