Patent ID: 8816256
Filing Date: 2014-08-26
Classification: F21S,H05B

Abstract:
1. A heat generator, comprising: a transparent film having a three-dimensional curved surface; a first electrode and a second electrode facing each other on the three-dimensional curved surface of the transparent film; and a mesh conductive film on the three-dimensional curved surface of the transparent film between the first electrode and the second electrode, wherein the mesh conductive film includes conductive thin metal wires in a mesh pattern with a plurality of lattice intersections, and the thin metal wires have a width of 1 to 40 μm and the mesh pattern has a pitch of 0.1 to 50 mm, wherein Lmin is a minimum value of a distance between the first electrode and the second electrode, and Lmax is a maximum value of the distance between the first electrode and the second electrode, wherein (Lmax−Lmin)/((Lmax+Lmin)/2)≦0.375, and wherein Lmax and Lmin are distances between respective pairs of opposite points in the first electrode and the second electrode measured along the three-dimensional curved surface of the conductive film wherein the heat generator has a surface resistance of 10 to 500 ohm/sq and an electrical resistance of 12 to 120 ohm.