Illumination device, automotive lighting equipment, and vehicle
View Patent ↗An illumination device improved in safety to the eye is provided. The illumination device includes: a semiconductor laser element to serve as an excitation light source which emits laser light; a fluorescent plate which contains a fluorescent substance for emitting light of a desired color and is irradiated with laser light emitted from the semiconductor laser element; a light receiving element part which detects light reflected from the fluorescent plate; and a light source control part which controls laser light emitted from the semiconductor laser element based on a detection signal from the light receiving element part.
1. An illumination device comprising:
a light source which emits light of a specific wavelength;
a fluorescent member which comprises a fluorescent substance and is irradiated with light emitted from the light source;
a reflected light sensing part which detects the specific wavelength among light reflected from the fluorescent member; and
a light source control part which controls light emitted from the light source based on a detection signal of the reflected light sensing part.
2. An illumination device according to claim 1 , wherein the light source comprises a semiconductor laser element.
3. An illumination device according to claim 1 , wherein the reflected light sensing part comprises a light receiving element.
4. An illumination device according to claim 1 , wherein the reflected light sensing part detects a change in reflected light intensity which corresponds to a displacement amount of the fluorescent member, and then outputs the detection signal to the light source control part.
5. An illumination device according to claim 1 , wherein the reflected light sensing part comprises a light receiving element, which is divided to have four light receiving regions.
6. An illumination device according to claim 1 , wherein the fluorescent member is provided with a reflective region made from a material that is different from the fluorescent substance.
7. An illumination device according to claim 1 , further comprising an optical filter, which is placed between the fluorescent member and the reflected light sensing part to block at least a portion of illumination light emitted from the fluorescent member.
8. An illumination device according to claim 1 , wherein the fluorescent member is shaped like a plate.
9. An illumination device according to claim 1 ,
wherein the fluorescent member comprises a plurality of fluorescent regions designed to emit light of colors different from one another, and
wherein the illumination device further comprises a fluorescent member driving part for moving the fluorescent member.
10. An illumination device according to claim 6 , wherein the reflective region has at least one of a convex part and a concave part.
11. An automotive lighting equipment comprising the illumination device according to claim 1 .
12. An vehicle comprising the automotive lighting equipment according to claim 11 .
13. A vehicle according to claim 12 , further comprising a collision detecting part for detecting a collision,
wherein the light source control part controls light emitted from the light source based on a detection signal from the collision detecting part.
14. A vehicle comprising:
an automotive lighting equipment comprising an illumination device; and
a collision detecting part for detecting a collision,
wherein the illumination device comprises:
a light source which emits light of a specific wavelength;
a fluorescent member which is irradiated with light emitted from the light source; and
a light source control part which controls light emitted from the light source, and
wherein the light source control part controls light emitted from the light source based on a detection signal from the collision detecting part.
15. A vehicle according to claim 14 , wherein the light source comprises a semiconductor laser element.