Koito Manufacturing Company, Ltd.

Masanori Kito

Naoki Uchida

Kazuya Motohashi

Honami Fujii

A vehicle headlight (), which is one aspect of a vehicle illumination lamp, includes: light sources (R,G,B), and diffraction gratings (R,G,B) for diffracting light incident from the light sources (R,G,B). The light diffracted by the diffraction gratings (R,G,B) is irradiated in a predetermined light distribution pattern. A projection area (AR) to which are projected components (LC, LC, LC) advancing and passing through the diffraction gratings (R,G,B) among the light incident on the diffraction gratings (R,G,B) is positioned below the light distribution pattern and within a range (RNG) in which a field of view of a driver of a vehicle is obstructed by the vehicle.

Vehicle illumination lamp

A headlight () includes a lamp unit () including: light sources (R,G,B) that emit laser light; and phase modulation elements (R,G,B) that diffract the laser light emitted from the light sources (R,G,B) with a phase modulation pattern that is changeable, and emit light of a light distribution pattern based on the phase modulation pattern. The lamp unit () adjusts a total luminous flux amount of light emitted from the lamp unit () according to the light distribution pattern.

Headlight for vehicle

Vehicle illumination lamp and vehicle headlight

A vehicle lamp is provided with a light source () that emits light in a predetermined wavelength band, a diffractive optical element () that diffracts the light emitted from the light source () to have a predetermined light distribution pattern, and a shade () that shields, of the light forming the predetermined light distribution pattern, at least part of the light forming the outer peripheral portion of the predetermined light distribution pattern, and the shade () shields the light forming the outer peripheral portion of the predetermined light distribution pattern over the entire circumference of the light distribution pattern.

Vehicle lamp

A vehicle headlamp () includes: a light source (R,G,B) that emits light having a predetermined wavelength; a light distribution pattern forming optical system (R,G,B) that includes a collimator lens (R,G,B) and a diffraction grating (R,G,B) that change a traveling direction of at least some of pieces of light emitted from the light source (R,G,B), and emits light (L, L, L) having a predetermined light distribution pattern; and a vibration imparting unit (R,G,B) that relatively vibrates the light source (R,G,B) and the diffraction grating (R,G,B).

A vehicle lamp () includes a light source () that emits pieces of laser light (LR, LG, LB) having different wavelengths in a time division manner, and a plurality of diffraction gratings (R,G,B) corresponding to the pieces of laser light (LR, LG, LB) of the wavelengths, respectively. The laser light (LR, LG, LB) of the wavelengths emitted from the light source () are incident on the diffraction gratings (R,G,B) corresponding to the laser light (LR, LG, LB), and regions irradiated with light (DLR, DLG, DLB) emitted from the diffraction grating (R,G,B) overlap with each other.

A headlight includes light sources, and phase modulation elements that diffract lights incident from the light sources with changeable phase modulation patterns. The lights diffracted by the phase modulation elements are emitted with a low beam light distribution pattern that is a predetermined light distribution pattern based on the phase modulation patterns. A projection region on which zeroth order lights, that are emitted from the phase modulation elements without being diffracted by the phase modulation elements, among the lights incident on the phase modulation elements, are projected is located within a range where a driver's view of a vehicle is obstructed by the vehicle.

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Shizuoka, Japan

Masanori Kito