| 摘要 |
The invented luminaire uses magnetic suspension to position a plastic disc to which a permanent magnet is attached, in midair. The disc is kept in suspension between an electromagnetic coil in a stationary part of the luminaire, positioned above the disc, and a base of the luminaire. Multiple electromagnetic coils may be applied, for example to create a broader area of levitation with electromagnetic coils spaced apart, or to improve control of the levitation. The disc is coated with remote phosphor. A royal blue LED in the base of the luminaire emits light towards the disc. The phosphor of the disc is then excited and emits light. Switching on/off of the LED is triggered by a Hall Effect Sensor which is also used for sensing the position of the disc for controlling the suspension. |
