| 摘要 |
PROBLEM TO BE SOLVED: To provide a planar heating element capable of efficiently and uniformly warming a mirror surface in the shape of a circle, an oval, or a polygon, and also capable of efficiently and uniformly keeping the temperature of the mirror surface even in its vertical direction, without making its structure complicated, and to provide an anti-frosting mirror using it. SOLUTION: This planar heating element is formed by wiring a resistance wire in a zigzag line so that a heat generating part practically takes the shape of a circle, an oval, or a polygon, and preferably spaces between the resistance wires are wider in its upper part and narrower in its lower part. In addition, this anti-fogging mirror is formed by sticking a mirror having the same planar shape as that of the heat generating part to the heat generating part together. COPYRIGHT: (C)2007,JPO&INPIT |
