Abstract
In this study, we investigated and analyzed the correlation between high beam and low beam and the low beam irradiation characteristics of LED head lamps using a headlight tester based on each inspection standard for automotive headlights. From the experimental results, it was confirmed that the irradiation characteristics switched to the low beam did not fully satisfy the inspection criteria with respect to the appropriate irradiation direction and luminosity of the high beam. It was also found that when the halogen lamp was changed to the LED head lamp in the low beam of the 4-lamp type headlight, the change in the irradiation direction was small, but the increase in the irradiation light intensity differed depending on the vehicle.
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