| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device which can more stably turn on. <P>SOLUTION: The straight tube type lighting device 1 includes a light-emitting body comprising light emitting diodes and a control device for controlling power to be supplied to the light emitting body, and the controlling device determines whether the device is connected in series to other lighting devices, and when it is determined that it is connected in series to other lighting devices, power is controlled to have a positive correlation between a voltage and a current to be supplied to the light emitting diodes, and when it is determined that the device is not connected in series to other lighting devices, the power is controlled so that the power to be supplied to the light emitting diodes may become almost constant. <P>COPYRIGHT: (C)2012,JPO&INPIT |
