Formed body with curved surface shape, method of producing the formed body, front cover for vehicle lighting device, and method of producing the front cover

A curved-surface body comprising:

• a transparent substrate having a three-dimensional curved surface, a transparent conductor, and opposing first and second electrodes formed at opposite ends of the transparent conductor, the transparent conductor having a surface resistance of 10 to 500 Ω/sq and an electrical resistance of 12 to 120 Ω,
• wherein when the transparent conductor has a first electrical resistance value R0 before being stretched and a second electrical resistance value Ra after being stretched by 5%, the transparent conductor maintains a relationship:
• Ra≦(2×R0),
• the transparent conductor has a curved surface that has a curvature radius of 300 mm or less, and
• when a first set of opposite points in the first electrode and the second electrode has a minimum distance value Lmin, wherein each point of the first set of opposite points are located along the boundaries where the first and second electrodes touch the transparent conductor, respectively, and a second set of opposite points in the first electrode and the second electrode has a maximum distance value Lmax, wherein each point of the first set of opposite points are located along the boundaries where the first and second electrodes touch the transparent conductor, respectively, the first electrode and the second electrode satisfy the relationship:
• (Lmax−Lmin)/((Lmax+Lmin)/2)<0.375.