Invention Grant
- Patent Title: Systems and methods for driving light emitting diodes
- Patent Title (中): 驱动发光二极管的系统和方法
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Application No.: US13356796Application Date: 2012-01-24
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Publication No.: US09101025B2Publication Date: 2015-08-04
- Inventor: Wei Lu , Stephen Leeboon Wong , William Mai , Tri Le
- Applicant: Wei Lu , Stephen Leeboon Wong , William Mai , Tri Le
- Applicant Address: BB St. Michael
- Assignee: MARVELL WORLD TRADE LTD.
- Current Assignee: MARVELL WORLD TRADE LTD.
- Current Assignee Address: BB St. Michael
- Main IPC: H05B37/00
- IPC: H05B37/00 ; H05B39/00 ; H05B41/00 ; H05B33/08

Abstract:
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.
Public/Granted literature
- US20120194087A1 Systems and Methods for Driving Light Emitting Diodes Public/Granted day:2012-08-02
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