| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED bulb with pantoscopic and high heat radiation properties.SOLUTION: An LED lamp 930A is provided with: a heat-conductive hollow member 110A consisting of a heat-radiating outer face 110A-a, a light-reflecting inner face 110A-b, and a plurality of fluorescent windows 130A to form an inner space HS; a light-emitting unit 140 including at least one light-emitting diode (LED) element 141 emitting a blue primary light beam L1 and arranged inside the inner space HS in thermal coupling with the heat-conductive hollow member 110A; and a fluorescent cover 120A arranged so as to cover an opening at a top end of the heat-conductive hollow member 110A. Yellow fluorescent materials contained in the fluorescent windows 130A and the fluorescent cover 120A convert a wavelength of the blue primary light beam L1 into those of yellow secondary light beams L2, L3, and a white illumination beam formed by mixing a part of the blue primary light beam L1 and the yellow secondary light beams L2, L3 is emitted outside. The LED lamp 930A, a turn-on circuit 160 incorporated in a housing 180, and a base for power feeding 170, are integrated to configure the LED bulb with pantoscopic and high heat radiation properties. |
