| 摘要 |
<p>PURPOSE: A light emitting diode lighting device having a power compensation function minimizes power changes due to input power changes by compensating for power caused by the change of AC power through a light emitting unit. CONSTITUTION: A light emitting diode lighting device includes a rectifier unit (20), a light emitting unit (30), and a power compensation unit (40). The light emitting unit includes multiple light emitting diodes (D1L, D2M, D3N) connected to each other in series. The light emitting diodes have different lighting time according to the size of a ripple voltage. The rectifier unit rectifies AC power and supplies the ripple voltage to the light emitting unit. The power compensation unit senses the change of the ripple voltage supplied to the light emitting unit and compensates for a current supplied to the light emitting unit according to the change of the sensed voltage. [Reference numerals] (41) Constant current source; (42) Sensing unit; (43,46) Reference voltage generation unit; (44) Action mode selection unit</p> |
