Patent ID: 9030107
Filing Date: 2015-05-12
Classification: H05B,Y02B

Abstract:
1. An illumination apparatus comprising: a series circuit of a thyristor and at least one load circuit connected across an AC power source; and a current adjusting circuit includes a current control circuit and a short circuit, the current adjusting circuit being connected in parallel to the load circuit, wherein the current control circuit is configured to adjust an input current applied to the current adjusting circuit to be maintained at a predetermined level during a part or the whole of an ON period of the thyristor, wherein the short circuit is configured to short-circuit input ports of the load circuit to have a predetermined resistance during a part of the ON period of the thyristor and a part or the whole of an OFF period of the thyristor, wherein a short-circuit current is generated such that the input current is increased when the input ports of the load circuit are short-circuited by the short circuit, and wherein the input current of the current adjusting circuit is adjusted stepwise depending on a voltage of the AC power source during the ON period of the thyristor.