Power supply having dual inverters for electroluminescent lamps

A power supply for driving an electrical device requiring alternating current from a direct current source, said direct current source having a low voltage, said electrical device having a first terminal and a second terminal, said power supply comprising:

• a first inverter for converting said low voltage to a high voltage, said first inverter having an output terminal for connection to said first terminal of said electrical device and a control terminal for receiving a control signal to enable or disable said first inverter;
• a second inverter for converting said low voltage to a high voltage, said second inverter having an output terminal for connection to said second terminal of said electrical device and a control terminal for receiving a control signal to enable or disable said second inverter;
• and
• a pulse generator having a first output terminal and a second output terminal, said pulse generator producing control signals in the form of first pulses at said first output terminal and second pulses at said second output terminal, wherein
• (i) said first pulses and said second pulses have the same frequency and said second pulses are the inverse of said first pulses;
• (ii) the first output of said pulse generator is connected to the control terminal of said first inverter;
• (iii) the second output of said pulse generator is connected to the control terminal of said second inverter;
• and
• (iv) said pulse generator causes said first and second inverters to alternately power said electrical device.

A method for powering an electroluminescent lamp from a direct current source having an electrical ground and a low voltage terminal, said electroluminescent lamp having a first terminal and a second terminal, said method comprising the steps of:

• connecting to said first terminal a first inverter for converting said direct current into a first train of high voltage pulses;
• connecting to said second terminal a second inverter for converting said direct current into a second train of high voltage pulses;
• and
• non-simultaneously supplying said first train of high voltage pulses to said first terminal and said second train of high voltage pulses to said second terminal.