Light-transmissive plastic plate structure with curved surface and method for fabricating the same

A light-transmissive plastic plate structure with curved surface, comprising:

• a substrate, said substrate at least comprising a transparent hard plastic material and having an outer surface and an inner surface opposite to the outer surface;
• a primer layer, furnished at an outer rim area of the inner surface of the substrate;
• a connecting structure, fixed to the outer rim area of the inner surface of the substrate at a position having the primer layer;
• and
• at least one sealing ring layer;
• said sealing ring layer being disposed on a surface of the primer layer facing the connecting structure, such that the sealing ring layer is sandwiched between and fully covered by adjoining surfaces of the primer layer and the connecting structure;
• wherein:
• the substrate has a curved surface at least at the outer rim area of the inner surface;
• the connecting structure has an L-shaped structure in sectional view and is for connecting to an external component, such that the substrate can be connected to the external component through the connecting structure;
• the connecting structure is made of hard plastic material or metal material;
• wherein, when the connecting structure is made of hard plastic material, the connecting structure is molded and fixed on the outer rim area of the inner surface of the substrate having the primer layer by using an insert-molding injection process;
• when the connecting structure is made of metal material, the connecting structure is adhered and fixed to the outer rim area of the inner surface of the substrate at a position having the primer layer by using the primer layer as an adhesive;
• the primer layer is for providing good adhesion effect between the substrate and the connecting structure;
• each said sealing ring layer is applied on the surface of the primer layer facing the connecting structure by a dispensing method, and is extending in a ring shape around the outer rim area of the inner surface of the substrate having the primer layer;
• the material of the sealing ring layer includes one of the following:
• silicone and polyurethane (PU), which is for improving the sealing effect between the substrate and the connecting structure.