Electroluminescent devices and their manufacture

摘要

A process for producing a conformal electroluminescent system is disclosed. An electrically conductive base backplane film layer (16) is applied upon a substrate (12). A dielectric film layer (18) is applied upon the backplane film layer (16), and then a phosphor film layer (20) is applied upon the dielectric film layer (18). The phosphor film layer is excited by an ultraviolet radiation source during application and the ultraviolet radiation source provides visual cues while the phosphor film layer is being applied. The application of the phosphor film layer is adjusted in response to the visual cues during the phosphor application step to apply a generally uniform distribution of the phosphor material upon the dielectric film layer. An electrode film layer (22) is applied upon the phosphor film layer (20) using a substantially transparent, electrically conductive material. An electrically conductive bus bar (24) can optionally be applied upon the electrode film layer (22). The backplane film layer (16), dielectric film layer (18), phosphor film layer (20) and electrode film layer (22) are aqueous-based and are applied by spray conformal coating. The phosphor film layer is excitable by an electrical field established across the phosphor film layer upon application of an electrical charge between the backplane film layer and the electrode film layer such that the phosphor film layer emits electroluminescent light.