| 摘要 |
<p>The relates to electric lighting facilities powered from an external electrical network. The light-emitting diode lamp comprises a step-down voltage converter (1) made up of a chain of capacitors (2, 3, 4) connected in series, one of which is a power take-off capacitor (3) and is connected to at least one pair (5) of inverse-parallel connected light-emitting diodes (6, 7). In the design variants, a discharge resistor (8) is disposed at the input to the convertor (1), current-limiting resistors (9, 10) are positioned and after the power take-off capacitor (3), and bridge rectifier (12) with a capacitor f!iter and a general purpose connector for supplying power to external users connected in parallel to the light-emitting diodes (6, 7) via an interlocked switch (11). In order to protect against overvoltage, voltage reference diodes (13, 14), connected in series and in oppposite directions, are makes it possible to achieve extremely low electrical energy consumption for lighting, ensure opthimum performance, and use the circuit for the additional function of supplying power to external users of, for example, moble telephones.</p> |
