Organic electroluminescence display device

Abstract

An organic electroluminescence display device is provided. The OEL device includes a substrate, a first electrode layer, a second electrode layer, an organic functional layer and at least one electrochromic medium layer. The first electrode layer is disposed on the substrate, the second electrode layer is disposed over the first electrode layer, and the organic functional layer and the electrochromic medium layer are disposed between the first electrode layer and the second electrode layer. Accordingly, the electrochromic medium layer is provided as a selective light valve to improve the reflection of the external light, and thus the contrast ratio of the organic electroluminescence display device is enhanced.

1 - 16 . (canceled)  
   
   
       17 . A organic electroluminescence display device, comprising: 
 a first substrate, having a displaying surface;    a first electrode layer, disposed on the first substrate;    a second electrode layer, disposed over the first electrode layer;    an organic functional layer, disposed between the first electrode layer and the second electrode layer; and    a selective light valve, disposed over the displaying surface.    
   
   
       18 . The organic electroluminescence display device of  claim 17 , wherein the selective light valve comprises a liquid crystal light valve.  
   
   
       19 . The organic electroluminescence display device of  claim 18 , wherein the liquid crystal light valve comprises a second substrate, a third substrate and a liquid crystal layer, the third substrate is disposed over the displaying surface, and the liquid crystal layer is disposed between the second substrate and the third substrate.  
   
   
       20 . The organic electroluminescence display device of  claim 18 , wherein the liquid crystal light valve comprises a second substrate and a liquid crystal layer, and the liquid crystal layer is disposed between the displaying surface and the second substrate.  
   
   
       21 . The organic electroluminescence display device of  claim 17 , wherein at least one electrochromic medium layer is further disposed between the first electrode layer and the second electrode layer.