Electroluminescent modular lamp unit

An electroluminescent lamp module comprising:

• a flexible substrate having a relatively large lamp receiving surface, having an array of conductive traces disposed on said surface;
• and
• a plurality of flexible, multi-layer sheet-form electroluminescent lamps, each comprising a sheet-form layer containing electroluminescent particles, said layer disposed between a pair of sheet-form conductive layers, one of which is transparent for transmitting light emitted from said particles, each of said lamps having conductors exposed for engagement with said conductive traces on said substrate, each of said lamps being of area smaller than said substrate, said lamps each being placed on said substrate and permanently secured face-to-face thereto by localized ultrasonic weld regions between said mating surfaces of said sheet-form lamp and substrate with said lamp and substrate being mutually deformed at said weld regions, said lamps having conductors engaging corresponding conductive traces of said array.