| 摘要 |
PROBLEM TO BE SOLVED: To provide a light source device with high heat-radiation efficiency capable of emitting fluorescent light with high brightness.SOLUTION: A reflection type light source device comprises: a solid light source 1 generating excitation light flux 7; and a phosphor layer 2 arranged at a position separated from the solid light source 1 in which fluorescent light is emitted from a surface which the excitation light flux 7 irradiates. A reflection layer 3 is provided on a rear face of the phosphor layer 2 in the present invention. A jointing material is not interposed between the phosphor layer 2 and the reflection layer 3. A plurality of metal bumps 4 are arranged on a predetermined region between a substrate 5 and the reflection layer 3 so as to support the phosphor layer 2 and the reflection layer 3 on the substrate 5. At this time, the region on which the metal bumps 4 are arranged is to be a region corresponding to the region (irradiation region 8) where the excitation light flux 7 is irradiated on the phosphor layer 2. Thereby, heat of the phosphor layer 2 on the irradiation region 8 can be efficiently conducted to the substrate 5 via the metal bumps 4 so as to radiate heat. |
