Display device

Abstract

Electroluminescence elements mounted on a substrate of an OLED display device are sealed by a protective film made of synthetic resin with chemical reaction curing in place of a sealing can. The protective film is formed such that a thickness thereof is equal to or larger than a thickness of the substrate. Alternatively, the protective film is formed by laminating a plurality of resin films which differ in one of the water absorption ratio, the elastic modulus and the hardness. With respect to the protective film which is formed of a plurality of laminated films, compared to the protective film at the electroluminescence element side, the protective film which covers the former protective film has the water absorption ratio, the elastic modulus or the hardness larger than the water absorption ratio, the elastic modulus or the hardness of the former protective film. Due to such a constitution, it is possible to reduce the thickness of the OLED display device without damaging the moisture-proof property of the electroluminescence elements.

1 . A display device comprising: 
 a substrate;    an electroluminescence device comprising a light emitting layer and a pair of electrodes with the light emitting layer in between, which are stacked over the substrate;    a film formed over the upper electrode;    wherein the film comprises a glass film or a metal layer;    wherein light emitted from the light emitting layer irradiates the other side of the film.    
   
   
       2 . A display device comprising: 
 a substrate;    an electroluminescence device comprising a light emitting layer and a pair of electrodes with the light emitting layer in between, which are stacked over the substrate;    a first film comprising a transparent film, which covers the upper electrode;    wherein a glass film or a metal layer is formed over the first film;    wherein light emitted from the light emitting layer irradiates across the first film.    
   
   
       3 . A display device comprising: 
 a substrate;    a pair of electrodes with electroluminescence layer in between, which is stacked over the substrate;    a flexible printed wiring board electrically connected to the lower electrode, which is mounted over the substrate;    first film which covers the upper electrode;    second film which covers the first film, the flexible printed wiring board and the lower electrode.