Do all displays emit electromagnetic (emi) and radio frequency (rfi) interference?
They all emit some level of radiation. What is important however is that these levels do not exceed the levels set out by the relevant standard. These levels are specified as being the acceptable limit to ensure that the performance of an electronic or electrical apparatus will neither disturb that of another apparatus nor be degraded by electromagnetic disturbance. EMI from an LCD or EL display originates from the internal electronic circuitry and is channeled through the open display. This is why a shield is either required across the aperture or on the circuitry itself. EMI on a plasma display emanates from the display itself and the reaction between the phosphors in the subpixels and the gas in plasma state. This cannot be dealt with at board level. Return to top.
