Abstract
LED automotive lamps have become the mainstream automotive lighting equipment due to their own characteristics of energy conservation and environmental protection. However, at present, the problem of high junction temperature of LED automotive lamp chips has not been effectively solved, resulting in the decline of lighting effect and service life of LED automotive lamps, which greatly restricts the further development of LED automotive lamps. Generally, the junction temperature of LED automotive lamp chips is affected by many factors. In this paper, the effects of different factors (chip power, ambient temperature, chip distribution spacing, chip distribution shape) on the junction temperature of LED automotive lamp chip are explored by using the method of constant temperature experimental platform and ANSYS Workbench simulation; The experimental phenomena of LED junction temperature varying with different factors are analyzed in this paper. The results show that appropriately increasing the spacing of light sources in the LED automotive lamp chip can greatly reduce the chip junction temperature, and appropriately changing the distribution spacing between LED automotive lamp chips can also reduce the chip junction temperature to a certain extent. The research provides a certain basis for effectively controlling the junction temperature of LED automotive lamp chip and prolonging the life of LED automotive lamps.
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