| 摘要 |
<p>There is described a circuit (2) for retro-lighting a display, comprising a group (4) of white light-emitting diodes connected in series between a first node (A) and a second node (B) and a circuit for driving said group (4) of series-coupled light-emitting diodes comprising :
- a power supply (6) providing a positive voltage supplied to the first node (A); and,
- a charge pump converter providing a negative voltage obtained from the positive voltage, said negative voltage being supplied to the second node (B).</p> |
