SWITCH LIGHTING EL SHEET AND LIGHTING SWITCH AND ELECTRONIC APPARATUS USING IT

摘要

A switch lighting EL sheet (7) comprising, laminated sequentially from a light emitting side, a transparent protection film (8), a transparent electrode layer (9), a light emitting layer (10), a dielectric layer (11) and a rear electrode layer (12). The transparent protection film (8) has a thickness of 10mum through 60mum, with the transparent electrode layer (9) consisting of conductive polymer. Such an EL sheet (7) can prevent disconnection and non-lighting caused by keying stress or the like without scarifying key switch reliability and clicking feeling. The EL sheet (7) is located, for example, between a key-top (1) and a switch mechanism (2) as a light source for lighting the key-top (1).