| 摘要 |
<p>The objective of the present invention is to provide a lighting device capable of: charging a charge from operation power; and operating all LED stages in all sections of operation voltages by discharging the charged charge if the operation power has a lower voltage than a voltage to operate the LED stages so that the power can be supplied to the LED stages. To achieve the objective, the lighting device comprises: a rectifying circuit unit to receive alternating current power to output an operation voltage; a lighting unit which includes LED stages to store a charge by receiving the operation voltage and to operate the LED stages using the stored charge even in a voltage that the operation voltage fails to operate the LED stages; and a switch control unit including a switch to control operation of the LED stages. The lighting unit consists of multiple groups, each of which includes a charge storing capacitor, an LED stage that is connected to the charge storing capacitor in parallel; and a counterflow preventing diode, wherein the charge storing capacitors of adjacent groups in each group are connected in series.</p> |
