A headlamp of one embodiment of this invention includes a laser element for emitting a laser beam, a light emitting section for generating fluorescence upon receiving the laser beam, and a reflecting mirror for projecting the fluorescence. Distribution of the fluorescence emitted by the light emitting section corresponds to Lambertian distribution, and an incident angle of the laser beam with respect to an excitation light irradiated surface, which is a surface of the light emitting section irradiated with the laser beam, is set so that use efficiency of the fluorescence emitted by the light emitting section is increased.

Claims

14 · 2 independent · depth 3

14 granted claims

›1.independentA light emitting device comprising:nan excitation light source for emitting excitation light;a light emitting section for emitting fluorescence upon r…+11

›2.↳ 1The light emitting device as set forth in claim 1, wherein:nthe incident angle is within a range of 40° or more but not more than 70° with respect to …d2

›3.↳ 1The light emitting device as set forth in claim 1, wherein:nthe excitation light is a P-polarized laser beam with respect to the excitation light irra…d2+1

›5.↳ 1The light emitting device as set forth in claim 1, wherein:nthe light projecting section includes a reflecting mirror; andthe reflecting mirror includ…d2

›6.↳ 1The light emitting device as set forth in claim 1, wherein:nthe light emitting section is supported by a heat conductive member.d2

›7.↳ 1The light emitting device as set forth in claim 1, wherein:nthe excitation light source is provided outside the light projecting section; andthe light…d2+1

›8.↳ 1The light emitting device as set forth in claim 1, further comprising:na magnifying lens for enlarging a range of the light emitting section which ran…d2

›10.↳ 1The light emitting device as set forth in claim 1, further comprising:nan optical fiber for guiding, to the light emitting section, the excitation lig…d2

›11.↳ 1A vehicle headlamp comprising a light emitting device recited in claim 1.d2

›12.↳ 1An illumination device comprising a light emitting device recited in claim 1.d2

›13.independentA light emitting device comprising:nan excitation light source for emitting excitation light;a light emitting section for emitting fluorescence upon r…+1

Classifications

5 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B60Q1/04
B60Q1/00

USPC · US Patent Classification

362/538362/231362/84

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Hargobind S Sawhney

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1 priority documents

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Type	Document	Date
related publication	US 20120106189 A1	3 May 2012

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