Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
In this study, based on each inspection standard for automotive headlights, a headlight tester was used to investigate and analyze the correlation between high beam and low beam and irradiation characteristics of halogen headlights and LED headlights. The following contents were found from the experimental results. Compared to the proper irradiation characteristics of the halogen type headlight, when the headlight was replaced with the LED type, the irradiation direction did not fully satisfy the applicable range, but the irradiation luminous intensity increased two to three times. The irradiation intensity with respect to the irradiation time decreased by about 10% after 3 minutes and by about 30% after 40 minutes with the LED type. After that, there is little change until 120 min. With the halogen formula, the pressure gradually decreased by about 10 to 20% until 60 minutes later, and then remained little changed until 120 minutes. The irradiation direction with respect to the irradiation time is almost the same for both the LED type and the halogen type from immediately after lighting up to 120 minutes later.
