| 发明名称 | Light emitting diode driving apparatus | ||
| 摘要 | A light emitting diode (LED) driving apparatus is disclosed. The LED driving apparatus includes a rectifier for rectifying an alternating current (AC) voltage to supply a ripple voltage, a light emitting unit partitioned into two or more groups, each of the groups including a plurality of LEDs, and a driving controller for selectively driving one or more of the groups of the light emitting unit depending on a level of the ripple voltage, the driving controller driving at least one of the groups of the light emitting unit using current discharged from a capacitor connected with the at least one group when the ripple voltage is lower than an operating voltage of the light emitting unit. | ||
| 申请公布号 | US8841851(B2) | 申请公布日期 | 2014.09.23 |
| 申请号 | US201213568515 | 申请日期 | 2012.08.07 |
| 申请人 | LG Electronics Inc. | 发明人 | Cho Janghwan;Cheon Jeongin;Lee Dohyung |
| 分类号 | H05B37/02 | 主分类号 | H05B37/02 |
| 代理机构 | Ked & Associates, LLP | 代理人 | Ked & Associates, LLP |
| 主权项 | 1. A light emitting diode (LED) driving apparatus comprising: a rectifier for rectifying an alternating current (AC) voltage to supply a ripple voltage; a light emitting unit partitioned into two or more groups, each of the groups including a plurality of LEDs; and a driving controller for selectively driving one or more of the groups of the light emitting unit depending on a level of the ripple voltage, the driving controller driving at least one of the groups of the light emitting unit using current discharged from a capacitor connected with the at least one group when the ripple voltage is lower than an operating voltage of the light emitting unit. | ||
| 地址 | Seoul KR | ||