VEHICLE LAMP

摘要

A vehicle lamp includes a light polarizer that two-dimensionally scans excitation light forms a light intensity distribution having relatively high light intensity in a partial region (such as a region near the center), the light intensity distribution being required for a vehicle lamp. A control unit controls a first actuator by using resonance drive as well as a second actuator by using nonresonant drive so that a two-dimensional image is formed in a scan region with excitation light that is two-dimensionally scanned by a mirror unit and controls the second actuator to relatively reduce an oscillation rate around a second axis of the mirror unit, while the two-dimensional image is drawn in a partial region in the scan region with the excitation light that is two-dimensionally scanned by the mirror unit, to form the light intensity distribution having relatively high light intensity in the partial region in the scan region.

主权项

1. A vehicle lamp configured to form a predetermined light distribution pattern, the vehicle lamp comprising:
an excitation light source; a light polarizer that two-dimensionally scans excitation light, the light polarizer including:
a mirror unit that reflects excitation light incident from the excitation light source;a first actuator that oscillates the mirror unit around a first axis by using resonant drive; anda second actuator that oscillates the mirror unit around a second axis orthogonal to the first axis by using nonresonant drive, the light polarizer being arranged while the first axis is included in a vertical plane, as well as the second axis is included in a horizontal plane, a wavelength converter having a scan region in which a light intensity distribution is formed by drawing a two-dimensional image with the excitation light that is two-dimensionally scanned by the mirror unit; a control unit that controls the first actuator by using the resonance drive as well as the second actuator by using the nonresonant drive so that the two-dimensional image is formed in the scan region with the excitation light that is two-dimensionally scanned by the mirror unit; and an optical system that projects the light intensity distribution formed in the scan region to form the prescribed light distribution pattern, wherein the control unit controls the second actuator to relatively reduce an oscillation rate around the second axis of the mirror unit, while the two-dimensional image is drawn in a partial region in the scan region with the excitation light that is two-dimensionally scanned by the mirror unit, to form the light intensity distribution having relatively higher light intensity in the partial region in the scan region.