Illuminating apparatus, vehicle headlamp and control system of vehicle headlamp
View Patent ↗An illuminating apparatus includes a first light source that emits blue laser light, a light emitting section that emits light by being irradiated with the blue laser light, a second light source that emits green laser light, a biaxial MEMS scanner that irradiates a part of the light emitting section with the green laser light, and a convex lens that projects the light emitted from the light emitting section to the outside.
1. An illuminating apparatus comprising:
a first light source that emits a first light;
a light emitter that contains a phosphor and emits light after being irradiated with the first light that excites the phosphor;
a second light source that does not contribute to excitation of the phosphor and emits a second light which is infrared light or visible light having a different spectrum from an emission spectrum of the light emitted from the light emitter;
a light irradiator that irradiates a portion of the light emitter with the second light; and
a light projector that projects the first light and the second light which is emitted from the light emitter, wherein
the second light source projects information or a function different from the first light source,
the information includes at least one of a figure, a letter, a symbol, and a warning, and
the function includes at least one of projecting any size of a spot as a warning, and changing a color temperature of an area of the first light.
2. The illuminating apparatus according to claim 1 , wherein the light irradiator irradiates a surface of the light emitter where a majority of the first light is emitted.
3. The illuminating apparatus according to claim 1 , wherein the light projector is an optical system that images a light emitting pattern to the outside.
4. The illuminating apparatus according to claim 1 , wherein the light projector includes a convex lens.
5. The illuminating apparatus according to claim 1 , wherein a shape of a main surface of the light emitter is a rectangle.
6. The illuminating apparatus according to claim 1 , wherein a shape of a main surface of the light emitter is asymmetrical.
7. The illuminating apparatus according to claim 1 , further comprising a light guide between the first light source and the light emitter,
wherein a distribution of the first light on the light emitter is an image of the first light emitted by the light guide.
8. The illuminating apparatus according to claim 1 , wherein
the first light includes various colors, and
the light emitter emits light by scattering the first light.
9. The illuminating apparatus according to claim 8 , wherein
the light emitter includes a diffusion plate, and
the first light is scattered by being irradiated on the diffusion plate.
10. The illuminating apparatus according to claim 8 , further comprising a light guide between the first light source and the light emitter,
wherein a distribution of the first light on the light emitter is an image of the first light emitted by the light guide.
11. The illuminating apparatus according to claim 1 , wherein
the first light source is a light emitting diode, and
the light emitter contains a phosphor excited by the first light.
12. The illuminating apparatus according to claim 1 , wherein the light irradiator irradiates the second light by scanning a surface of the light emitter, and the light irradiator includes a microelectromechanical system (MEMS), a galvanometer, or a polygon mirror.
13. The illuminating apparatus according to claim 1 , wherein
the second light includes a spot shape, and
the light irradiator enlarges the light spot.
14. The illuminating apparatus according to claim 1 , wherein a projection pattern projected to the outside from the light emitter includes a first irradiation pattern from the first light and a second irradiation pattern from the second light.
15. The illuminating apparatus according to claim 1 , wherein a figure is projected from the light emitter after being irradiated with the second light.
16. The illuminating apparatus according to claim 1 , wherein the second light source intermittently emits the second light.
17. A vehicle headlamp comprising:
a first light source that emits a first light;
a light emitter that contains a phosphor and emits light after being irradiated with the first light that excites the phosphor;
a second light source that does not contribute to excitation of the phosphor and emits a second light which is infrared light or visible light having a different spectrum from an emission spectrum of the light emitted from the light emitter;
a light irradiator that irradiates a portion of the light emitter with the second light; and
a light projector that projects the first light and the second light which is emitted from the light emitter, wherein
the second light source projects information or a function different from the first light source,
the information includes at least one of a figure, a letter, a symbol, and a warning, and
the function includes at least one of projecting any size of a spot as a warning, and changing a color temperature of an area of the first light.
18. A control system of a vehicle headlamp comprising:
a vehicle headlamp including:
a first light source that emits a first light;
a light emitter that contains a phosphor and emits light after being irradiated with the first light that excites the phosphor;
a second light source that does not contribute to excitation of the phosphor and emits a second light which is infrared light or visible light having a different spectrum from an emission spectrum of the light emitted from the light emitter;
a light irradiator that irradiates a portion of the light emitter with the second light; and
a light projector that projects the first light and the second light which is emitted from the light emitter; and
a controller that controls an operation of the vehicle headlamp,
wherein the controller includes:
a detector that detects a state of a vehicle or conditions outside of the vehicle,
a lighting or non-lighting determiner that determines whether or not the second light is lighted according to the state of the vehicle or the conditions outside of the vehicle detected by the detector, and
a light source controller that controls lighting or non-lighting of the second light source based on a result determined in the lighting or non-lighting determiner.
19. An illuminating apparatus comprising:
a first light source that emits a first light;
a light emitter that contains a phosphor and emits light after being irradiated with the first light that excites the phosphor;
a second light source that does not contribute to excitation of the phosphor and emits a second light which is infrared light and visible light having a different spectrum from an emission spectrum of the light emitted from the light emitter;
a light irradiator that irradiates a portion of the light emitter with the second light; and
a light projector that projects the first light and the second light which is emitted from the light emitter, wherein
the second light source projects information and a function different from the first light source,
the information includes at least one of a figure, a letter, a symbol, and a warning, and
the function includes at least one of projecting any size of a spot as a warning, and changing a color temperature of an area of the first light.
20. An illuminating apparatus comprising:
a first light source that emits first light;
a light emitter that contains a phosphor and emits light after being irradiated with the first light that excites the phosphor;
a second light source that does not contribute to excitation of the phosphor and emits a second light which is infrared light or visible light having a different spectrum from an emission spectrum of the light emitted from the light emitter;
a light irradiator that irradiates a portion of the light emitter with the second light;
a light projector that projects the first light and the second light, which are emitted from the light emitter; and
a detector that detects a condition outside of the vehicle, wherein
the second light source projects a figure, a letter, or a symbol according to the condition detected by the detector.