A DC to DC converter includes a switch, a diode, and a capacitor connected in series with an inductor. The capacitor and inductor provide a resonant time period and are connected in series with the switch and the diode. A control circuit provides an on/off signal to the switch and has a switching ti.....
[更多]
A driving method for improving luminous efficacy of a light emitting diode (LED), the method comprising: periodically switching a DC current supplied to the LED between a high current level lH and a low current level lL, the low current level lLbeing fixed at zero or raised above zero to produce a D.....
[更多]
This invention provides a deodorant capable of releasing deodorant agents at certain temperatures and having improved adherence to textiles. The deodorant of this invention includes polymer particles formed by reacting a main monomer of (N-substituted alkyl)acrylamide, a functional monomer for bondi.....
[更多]
A hollow-core photonic bandgap fiber polarizer may include a core, an inner cladding surrounding the core, the inner cladding including a plurality of capillaries, and an outer cladding at least partially surrounding the inner cladding. A section of the capillaries distal to the core is asymmetric r.....
[更多]
A switched reluctance motor includes an inner stator having a plurality of stator poles with coil windings, the inner stator having a plurality of stator phases, an outer rotor configured to rotate around the inner stator, the outer rotor having a plurality of rotor poles, at least one position sens.....
[更多]
| |< <- | [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] | -> >| |
