| abstract |
The invention discloses an LED filament, which includes a plurality of LED chips, at least two electrodes and a light conversion layer. A plurality of LED chips and at least two electrodes are electrically connected to each other; the light conversion layer includes hard segments and soft segments, and the hard segments and soft segments are alternately arranged, and the light conversion layer covers the LED chips and part of the electrode and expose a part of the electrode. In the LED filament of the present invention, the light conversion layer has a multi-layered layered structure, and the hardness, light transmittance, and refractive index can be adjusted layer by layer, so that the hardness, light transmittance, and refractive index of the LED filament can be adjusted and changed to the maximum. In the best state, let the LED filament meet the needs of various LED bulbs with different needs. |