EL Lamp - Modern Lamp Design

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The definition of an EL lamp (Electro Luminescent lamp) is a capacitor structure with a phosphor sandwiched between two electrodes. One part of the electrode is transparent to allow light to pass. Once voltage is sent through an inverter across the electrodes it generates a changing electric field within the phosphor which then causes the phosphor to light. It takes anywhere from 100 volts to 400 volts to light an EL lamp. There also has to be a high enough frequency to light the lamps; this frequency is anywhere from 100 hertz to 1,000 hertz. You get this voltage and frequency using a small inverter which takes the DC voltage and changes it to AC voltage. The inverter sends out the correct frequency to allow the lamp to light. The typical power consumption of an EL is less than .25 MA at 115V AC per one square centimeter. When the voltage is increased to an EL lamp the light then gets brighter; when the frequency is changed the color of the EL lamp changes.

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