Drive circuit for at least one light-emitting diode

Details Drive circuit for at least one light-emitting diode Drive circuit for at least one light-emitting diode

1982-06-04

1984-11-27

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307254, 307311, H03K 342, H03K 326

Patent

active

044853114

ABSTRACT:
A series connection consisting of a diode and one of two transistors of a transistor push-pull circuit is connected in parallel to the feed current path for a light-emitting diode and a capacitor is interconnected between the junction of the push-pull transistors and the junction between the light-emitting diode and an additional diode which is present in the feed current path. When the transistor in the series connection is in a blocking state, the light-emitting diode receives feed current and is thus switched to a light-emitting state. The capacitor causes a current pulse to be superimposed on the feed current during switchover for rapidly driving the light-emitting diode by decreasing the time span required by the light-emitting diode to reach a condition of maximum light emission.

REFERENCES:
patent: 3648073 (1972-03-01), Sams et al.
patent: 3867580 (1975-02-01), Russel
patent: 4278900 (1981-07-01), Kapadia et al.
patent: 4388527 (1983-06-01), Fukuyama et al.

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