The principle of light emitting chips

luminescent sheets is luminous powder placed between two plate electrodes constituted. Which is a sandwich structure, the upper and lower electrodes each have an upper electrode is a transparent conductive film (ITO film), the light emitted from the surface, the lower electrode of the back electrode, the main material for silver or carbon, glow in the dark material mainly zinc sulfide (ZnS ), when the AC voltage is applied to the two electrodes, the electric field makes the (ZnS) - particle excitation transitions, resulting in a charge-discharge cycle every light, when it contains different activator, can emit different colors of light. EL luminance change of the voltage between the electrodes, the frequency of which varies with changes, generally increases with the brightness of a corresponding voltage and frequency.