Power supply for illuminating an electro-luminescent panel

A power supply for illuminating an EL lamp, comprising:

• means for providing an input voltage power source signal to said power supply, said power supply further comprising circuit means coupled to said EL lamp for generating an alternating drive voltage signal having a substantially constant current and frequency to illuminate said EL lamp;
• electronic ground fault current interrupter circuit means coupled to said input voltage power source signal for transferring said input voltage power source signal to said circuit means, said circuit means further comprising DC high voltage generating circuit means for producing a first and second DC voltage supply signals;
• said alternating drive voltage signal generating means comprising an alternating voltage signal controller circuit means for producing an alternating voltage signal having a predetermined frequency;
• transformer logic circuit means coupled to said alternating voltage signal controller for receiving said alternating voltage signal, said transformer logic circuit means further including a first and second output means for producing a first and second logic output alternating voltage signal, said first and second alternating voltage signal having a 180° phase relationship with respect to each other;
• first electronic switching means having an input coupled to said first logic output means;
• second electronic switching means having an input coupled to said second logic output means;
• said first and second electronic switching means each having a conductive and non-conductive operating state and being connected in series with one another and to a resonant circuit means comprising a choke and the EL lamp;
• one of said first and second electronic switching means being connected to said first DC high voltage supply signal and the other of said first and second electronic switching means being connected to said second DC high voltage supply signal;
• said one of said first and second electronic switching means switching to its conductive state in response to said first logic output voltage signal to connect said first DC high voltage supply signal to said EL lamp, and the other of said one of said first and second electronic switching means switching to its non-conductive state in response to said second logic output voltage signal to disconnect said second DC high voltage supply signal to said EL lamp during one half cycle of said first and second logic output voltage signal;
• and
• said other of said one of said first and second electronic switching means switching to its conductive state in response to said second logic output voltage signal to connect said second DC high voltage supply signal to said EL lamp, and the said one of said first and second electronic switching means switching to its non-conductive state in response to said first logic output voltage signal to disconnect said first DC high voltage supply signal to said EL lamp during the other half cycle of said first and second logic output voltage signals.