Abstract: A vehicle lamp includes a lamp housing, a carrier board, LEDs, and an optical unit. The lamp housing includes an accommodating space and an opening connecting the accommodating space. The carrier board is disposed in the accommodating space, and a front surface of the carrier board facing the opening. The LEDs are disposed on the front surface of the carrier board. The optical unit includes a light guide plate, light guide members and beam pattern adjusting structures. The light guide plate includes an upper surface and a lower surface, and the light guide plate covers the opening with the lower surface facing the carrier board. The light guide member protrudes on the lower surface, and each light guide member extends towards one LED. The beam pattern adjusting structures protrude on the upper surface, and each beam pattern adjusting structure is arranged to correspond at least one light guide member.

Abstract: A high-low beam switching device includes a lamp seat mechanism, a light pattern switching unit, and a light pattern tuning mechanism. The light pattern switching unit includes a light occluding plate pivotable relative to the lamp seat mechanism between low and high beam positions. The light pattern tuning mechanism includes a blocking member, an adjusting member operable to move the blocking member forwardly and rearwardly relative to the lamp seat mechanism, thereby adjusting an angle between the light occluding plate and the blocking member when the light occluding plate is pivoted to the low beam position.