LED LIGHT EMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an LED light emitting device which efficiently conducts radiation operation because a proposed conventional structure, in which a cooled object is placed in contact with a radiator by using a shape memory alloy to radiate heat, has problems such as the instability of the connection state created by the shape memory alloy and the delay in the heat radiation operation conducted in conjunction with the temperature rise of the cooled object.SOLUTION: The LED light emitting device includes: a substrate on which an LED element is mounted; and a housing that is a radiator, the housing to which the substrate is attached. In the LED light element, a heat conduction sheet and a shape memory alloy where volumetric capacity is increased by heating are sandwiched by a rear surface of the substrate and the housing to fix the substrate to the housing.