Title:
RIPPLE REDUCTION IN LIGHT EMITTING DIODE (LED)-BASED LIGHT BULB THROUGH INCREASED RIPPLE ON AN ENERGY STORAGE CAPACITOR
Document Type and Number:
WIPO Patent Application WO/2016/057742
Kind Code:
A3
Abstract:
A buck stage configured as a second stage of a lamp circuit for a light-emitting diode-based (LED-based) light bulb may reduce manufacturing costs associated with the bulb by reducing a size of a capacitor in the lamp circuit. A controller of the buck stage may adjust a duty cycle of a switch to increase a ripple, such as a voltage ripple, across the capacitor to increase accessibility of energy stored in the capacitor and decrease a ripple, such as in output current, to the LEDs.
Inventors:
MELANSON JOHN L (US)
Application Number:
PCT/US2015/054604
Publication Date:
July 14, 2016
Filing Date:
October 08, 2015
Export Citation:
Assignee:
PHILIPS LIGHTING HOLDING BV (NL)
International Classes:
H02M3/24; H05B44/00; H05B37/02
Foreign References:
| US20140021874A1 | 2014-01-23 | |||
| US20100213857A1 | 2010-08-26 | |||
| US20130088078A1 | 2013-04-11 | |||
| US20120242246A1 | 2012-09-27 |
Other References:
See also references of EP 3205182A2
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