摘要 |
System and methods are provided for driving one or more light emitting diodes (LEDs) to reduce audible noise. An example system includes a switching component, a system controller, and a current generator. The switching component is configured to receive a dimming signal with a predetermined dimming frequency and configured to switch on or off the one or more LEDs in response to the dimming signal, the predetermined dimming frequency being outside a frequency band of the audible noise. The system controller is configured to receive a feedback signal related to a LED current that flows through the one or more LEDs and configured to generate a drive signal. Additionally, the current generator is configured to receive the drive signal, to generate a charging current to store energy during a charging period and to generate the LED current during a discharging period. |
申请人 |
MARVELL WORLD TRADE LTD.;LU, WEI;WONG, STEPHEN, LEEBOON;MAI, WILLIAM;LE, TRI |
发明人 |
LU, WEI;WONG, STEPHEN, LEEBOON;MAI, WILLIAM;LE, TRI |