High voltage power supply for a helmet mounted display device

A helmet mounted display system comprising:

• a helmet including an electrically powered display device for providing information to the wearer of the helmet, the display device being supplied by a high voltage generated by a power supply from a low voltage power source;
• said power supply comprising first and second physically separate modules and an electrical conductor therebetween, wherein the first module is connectable to said low voltage source and contains circuitry operating at low voltage;
• the second module is connected to said first module, provides said high voltage supply and contains circuitry operating at high voltage, said second module is electrically connected to the display device to provide said high voltage to the display device, said circuitry of the second module is mounted in said helmet;
• and
• said electrical conductor extends between the two modules and carries current only at low voltage.