| CPC H10K 50/86 (2023.02) [H10K 50/841 (2023.02); H10K 50/844 (2023.02); H10K 71/00 (2023.02); H10K 59/12 (2023.02); H10K 59/1201 (2023.02)] | 19 Claims | 

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               1. A display device, comprising: 
            a substrate comprising a driving element and a light emitting element electrically connected to the driving element; 
                a window layer disposed on the substrate; 
                a first adhesive layer disposed on the window layer, the first adhesive layer comprising a magnesium compound comprising MgF2 and MgO and an yttrium compound comprising YOF; 
                a second adhesive layer disposed on the first adhesive layer; and 
                a refractive layer disposed on the second adhesive layer, the refractive layer comprising a perfluoropolyether (PFPE) compound. 
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