Sohan472004, An "INVERTER CIRCUIT" lights-up the thin "cold-cathode-fluorescent-lamps" inside lcd monitors by taking a low-voltage dc voltage (10 to 20 volts dc) and converting it to a high frequency 30khz to 100khz ac voltage (500 to 1100 vac) The same principle of operation is used to light-up those new style, curlieQ,energy-efficient,screw-in CFL light bulbs. Only their tiny "electronic-ballast" circuit is called a "CONVERTER" circuit.
AC to AC Hope this helps. 12fixlouie
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