Omnidirectional LED light bulb
An omnidirectional LED light bulb comprising a lamp base ( 1 ), a heat sink housing ( 2 ), a circuit board ( 5 ), an LED light source ( 3 ) and a bulb ( 4 ) is provided. The heat sink housing ( 2 ) is provided with a protruded platform ( 6 ) on which the light source ( 3 ) in a column shape of polygonal prism head is arranged. LED chips ( 9 ) are arranged on the top and lateral surfaces of the head, and an annular reflecting surface ( 10 ) is arranged on the rear portion of the head. The omnidirectional LED light bulb has the advantages of high rear light flux, omnidirectional luminescence and uniform illumination.
1. An omnidirectional LED light bulb, comprising a lamp base ( 1 ), a heat sink housing ( 2 ), an LED light source ( 3 ), a bulb ( 4 ), and a circuit board ( 5 ) arranged in a cavity of the heat sink housing ( 2 ), wherein the heat sink housing ( 2 ) is provided with a protruded platform ( 6 ) along the axial direction, the LED light source ( 3 ) which is an integrated light source with a shape of column is arranged on the top surface of the platform ( 6 ) and a packaging frame ( 8 ) thereof is provided with a polygonal prism head, LED chips ( 9 ) are arranged on the top and lateral surfaces of the head, and an annular reflecting surface ( 10 ) is arranged on the rear portion of the head of the frame ( 8 ).
2. The omnidirectional LED light bulb according to claim 1 , wherein the axial angle α between the reflecting surface ( 10 ) and the frame ( 8 ) is 15 degree to 35 degree.
3. The omnidirectional LED light bulb according to claim 2 , wherein the axial angle α a between the reflecting surface ( 10 ) and the frame ( 8 ) is 20 degree to 30 degree.
4. The omnidirectional LED light bulb according to claim l, wherein the platform ( 6 ) is provided with a mounting hole ( 7 ), and the rear end of the frame ( 8 ) is arranged in the mounting hole ( 7 ) and coupled with the protruded platform ( 6 ) by a thread.
5. The omnidirectional LED light bulb according to claim 4 , wherein the head of the frame ( 8 ) is in a hexagonal prism shape, LED chips ( 9 ) are arranged on each lateral surface of the frame ( 8 ), and the LED chips ( 9 ) on the top and lateral surfaces are integrally packaged by a lens ( 12 ).
6. The omnidirectional LED light bulb according to claim 1 , wherein the reflecting surface ( 10 ) is integrated with the frame ( 8 ).
7. The omnidirectional LED light bulb according to claim 1 , wherein the heat sink housing ( 2 ) is in a shuttle shape, and the bulb ( 4 ) is connected to the top of the platform ( 6 ) of the heat sink housing.
8. The omnidirectional LED light bulb according to claim 7 , wherein an insulation material ( 13 ) is arranged between the LED light source ( 3 ) and the heat sink housing ( 2 ), and the rear end of the LED light source ( 3 ) is provided with a fastening nut ( 14 ) on which an electrode joint ( 15 ) is arranged.