What Does Electroluminescent Display (ELD) Mean?

An electroluminescent display is a category of flat panel display created by sandwiching a thin film of electroluminescent material between two plates. An electroluminescent display makes use of the phenomenon of electroluminescence. Although electroluminescent displays are not as commonly used as other display types, they are used in industrial, instrumentation and transportation applications.

Techopedia Explains Electroluminescent Display (ELD)

Electroluminescent devices are similar in many ways to capacitors.The only difference between them is the phosphor layer used in electroluminescent displays. The electroluminescent display is constructed with the help of flat opaque electrode strips which are kept parallel to each other and which are covered by one layer of electroluminescent material such as phosphorus, and then by another layer of electrodes which are perpendicular to the layer at the end.