Vehicle light

摘要

A vehicle light can prevent color variations of the projected image. The vehicle light can include a laser diode, a wavelength conversion member including a phosphor configured to receive blue light emitted from the laser diode and then emitting white light, a projection lens configured to project the white light emitted from the wavelength conversion member to provide forward illumination for a vehicle, and a diffusing portion provided to the projection lens, configured to diffuse the excitation light which is incident on the projection lens from the wavelength conversion member.

主权项

1. A projection type vehicle light configured to project light forward, comprising:
a light source including a semiconductor light-emitting element; a wavelength conversion member including a phosphor configured to receive excitation light emitted from the semiconductor light-emitting element and emit visible light, and a metal plate configured to support the phosphor and have a mirror top surface so that the visible light emitted downward from the phosphor is reflected upward; and a reflector formed to be curved and opened obliquely downward in the forward direction, having a reflecting surface facing downward, and extending from a position adjacent a rear side of the wavelength conversion member to a position above the wavelength conversion member such that the visible light emitted from the wavelength conversion member is reflected to provide forward illumination, wherein: the wavelength conversion member is disposed to receive the excitation light from a position forward and obliquely upward relative to the wavelength conversion member and includes a surface inclined in a rearward direction toward the reflector such that the excitation light that is regularly reflected from the surface of the wavelength conversion member is directed rearward to be incident on a rear end portion of the reflector, the metal plate is inclined in the rearward direction toward the reflector such that the excitation light through the wavelength conversion member can be reflected by the surface of the metal plate toward the rear end portion of the reflector; the rear end portion of the reflector extends below a level of the wavelength conversion member such that substantially all the excitation light that has been regularly reflected from the surface of the wavelength conversion member is incident on the reflector, the rear end portion of the reflector includes a condenser reflection surface that is integrally formed with the reflecting surface and configured to condense on and reflect to the wavelength conversion member the excitation light that has been regularly reflected from the surface of the wavelength conversion member; a projection lens having an optical axis and configured to project the visible light reflected from the reflecting surface forward while inverting an image of the visible light; the visible light reflected by a central portion of the reflecting surface of the reflector is focused between the phosphor and the projection lens; the surface of the wavelength conversion member and the metal plate that are inclined are located on the optical axis of the projection lens; the condenser reflection surface is located on or below the optical axis of the projection lens; and the mirror top surface of the wavelength conversion member is inclined with respect to the optical axis of the projection lens by an angle such that part of the light emitted from the light source is regularly reflected by the mirror top surface to be directed to the condenser reflection surface.