Methods and circuits for distributing power to Suspended Particle Device (SPD) loads

The invention concerns an arrangement for providing a driving voltage from a primary power source to one or more SPD loads. A backbone wiring which carries a low voltage derived from said primary power source and a conversion stage which converts said low voltage to an AC driving voltage and supplies said AC driving voltage to said one or more SPD loads. The invention concerns also a respective method of providing a driving voltage from a primary power source to one or more SPD loads.