Curved lens and display device

A curved lens, comprising:

• a plurality of sub lenses around an optical center of the curved lens and connected with each other;
• wherein each of the plurality of sub lenses comprises a first curved surface and a second curved surface opposite to each other;
• a plurality of first curved surfaces of the plurality of sub lenses are connected with each other to form a light exit surface of the curved lens, and a plurality of the second curved surfaces of the plurality of sub lenses are connected with each other to form a light incident surface of the curved lens, and the light exit surface is closer to the optical center of the curved lens compared with the light incident surface;
• the light incident surface as a whole is a convex surface, and the light exit surface as a whole is a concave surface;
• and
• the plurality of the first curved surfaces and the plurality of the second curved surfaces are free-form curved surfaces,
• wherein a central thickness of each of the plurality of sub lenses is greater than 2.5 mm, an edge thickness of each of the plurality of sub lenses is greater than 1.2 mm, and a ratio of the central thickness to the edge thickness of each of the plurality of sub lenses ranges from 1.8 to 2.7.