| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To save energy when using a lighting device as an all-night light. <P>SOLUTION: In a lighting device, operation of a main circuit such as a power factor improving unit 20 and a power supply unit 30 is stopped to supply power from a control power supply unit 70 to an LED which serves also as an all-night light. The lighting device comprises: a load unit 40 formed of a plurality of light emitting elements; the power supply unit 30 which supplies power to the plurality of light emitting elements; a power supply control unit 60 which controls operation of the power supply unit; and the control power supply unit 70 which supplies power to the power supply control unit. Operation stop means 61 for stopping operation of the power supply unit 30 and switching means 80 for supplying power from the control power supply unit 70 to the light emitting elements, when a part of the plurality of light emitting elements of the load unit 40 is to be lighted up, are provided. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
