Abstract
The efficient cooling on semi-conductors of the electronic devices has been becoming important in recently developed computer industry. This paper describes the cooling problem on heat generating semi-conductor components (DC source) in electronic-luminescence board (LED) used as the destination indicator in JR station, to make a level up of the reliability and durability of the devices. The cooling approaches employed here are involved the natural/forced convection of air in the opened duct covering with the radiator fins enclosed in the board, backside of which is the DC sources. Particularly, fan motor on-off control cooling system is introduced depending on the temperature of the bimetal sensing. Cooling characteristics of the heat generating DC source semiconductor device by the present approaches are cleared.
