To prevent the occurrence of the flickering in a television and a personal computer screens resulting from the operation of an electric wire for heat generation, by providing the electric wire for heat generation and an electromagnetic wave screening plate which can screen the electromagnetic wave that are generated from the electric wire for heat generation operated by a commercial power supply, and which is formed out of a magnetic material.
In a space which is formed out of a back plate 5 and an electromagnetic wave screening plate 2 that covers the top of the back plate 5, a heat insulating material 3 and the electric wire 1 for heat generation are built in. The electromagnetic wave screening plate 2 forms a box shape without the bottom consisting of the upper wall 21 and a side wall 22, and the electric wire for heat generation 1 is equipped meanderingly on the heat insulating material 3 to contact the lower surface of the upper wall 21 of the electromagnetic wave screening plate 2. The electric wire for heat generation 1 has a structure, in which conductors 11 and 12 are insulated by an electric insulating layer 13. The conductors 11 and 12 are electrically connected to each other at one end, and the other end is connected to a commercial power supply. Thereby, the flickering in a television and a personal computer screens due to the low frequency electromagnetic wave from the electric wire for heat generation is solved.
HAYASHI YUICHI
YAMAMOTO KENGO
FUJITA NOZOMI
