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Inventor

Wanfeng Zhang

Inventor
Palo Alto, CA, US

Overview

58→
Patents
2008–2018
Patent span
Electricity
Primary field (CPC H)

Patents· 58 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H05Bprimary
H05BElectric heating37%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems28%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications22%
G01RMeasuring electric variables2%
G05FSystems for regulating electric or magnetic variables2%
H10HInorganic light-emitting semiconductor devices having potential barriers2%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h102%
Y02PClimate change mitigation technologies in the production or processing of goods2%
H01LSemiconductor devices1%
H02HEmergency protective circuit arrangements1%
PatentTitleYear
9,954,444Pfm-pwm control for power regulators20189,829,513Line voltage detection circuit20179,831,772Resonant converter with synchronous rectifier feedback20179,729,079'Method and apparatus for controlling TRIAC dimmable device'20179,699,853'Method and apparatus for dimmable LED driver'20179,692,316'Bleeder method using switch node coupling capacitor for TRIAC dimming of solid state lighting'20179,608,527'Overshoot prevention for deep dimming startup'20179,559,675'Current shaping scheme in TRIAC dimmable LED driver'20179,552,005'Systems and methods for estimating an output current of a power conversion circuit'20179,521,715'Current shaping for dimmable LED'20169,497,807'Dimmer circuit for electronic loads'20169,490,695'Method and apparatus for eliminating shimmering'20169,485,816'Method and apparatus for dimmable LED driver'20169,480,112'Current shaping for dimmable LED'20169,445,475'Buck regulator for LED lighting color mixing and/or current compensation'20169,425,684'Reduced noise power converter using novel shield'20169,392,654'Method and apparatus for controlling a power adjustment to a lighting device'20169,356,534'Method and apparatus for turning on a lighting device'20169,320,097'Multi-string dimmable LED driver'20169,306,387'Current limiting circuit and method for LED driver'20169,246,395'Circuits and methods for determining peak current'20169,247,621'Method and apparatus for selectively loading a dimmer circuit'20169,220,136'Method and apparatus for controlling a lighting device'20159,220,138'Soft bleeder to remove step dimming'20159,185,760'Alternating current (AC) line voltage determination'20159,185,755'Regulator for LED lighting color mixing'20159,179,523'Start-up voltage for solid-state lighting controller'20159,148,921'Method and apparatus for altering a color of a mixture of light provided by mixing outputs of light from multiple lamps'20159,144,137'Diode emulator circuit'20159,131,567'Temperature foldback circuit for LED load control by constant current source'20159,117,734'Integrated circuit architecture for light emitting diode-based displays'20159,101,018'Apparatuses for bleeding current from a transformer of a solid-state light emitting diode'20159,065,330'Method and apparatus for controlling TRIAC dimmable device'20159,042,124'Circuits and methods for determining peak current'20159,000,684'LED controller with compensation for die-to-die variation and temperature drift'20158,957,602'Correlated color temperature control methods and devices'20158,947,895'Two-peak current control for flyback voltage converters'20158,937,435'Diode bridge'20158,896,288'TRIAC dimmer detection'20148,847,517'TRIAC dimming systems for solid-state loads'20148,811,046'Primary side voltage control in flyback converter'20148,803,438'Method and apparatus for current control with LED driver'20148,796,954'Dimming control for electronic lamp'20148,786,205'Method and apparatus for LED lighting'20148,766,554'Method and apparatus for dimming'20148,749,208'Intelligent switching controller and power conversion circuits and methods'20148,748,910'Systems and methods for integrating LED displays and LED display controllers'20148,711,584'Reducing voltage stress in a flyback converter design'20148,704,455'Average output current estimation using primary-side sensing'20148,698,423'Color mixing system with buck-boost and flyback topologies'20148,558,474'Method and apparatus for dimming'20138,552,658'Light-emitting diode (LED) driver and controller'20138,520,415'Multi-function feedback using an optocoupler'20138,446,108'LED controller with compensation for die-to-die variation and temperature drift'20138,374,004'Isolated AC-DC converter with master controller on secondary side and slave controller on primary side'20138,344,709'Intelligent switching controller and power conversion circuits and methods'20137,514,913'Parallel current mode control using a direct duty cycle algorithm with low computational requirements to perform power factor correction'20097,317,625'Parallel current mode control using a direct duty cycle algorithm with low computational requirements to perform power factor correction'2008

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2008–2009Based in Kingston, CA· patent location history
2013–2017Patents assigned to MARVELL WORLD TRADE LTD (35)· patent assignee history
2013–2018Patents assigned to MARVELL INT LTD (22)· patent assignee history
2013–2016Patents assigned to ZHANG WANFENG (20)· patent assignee history
2013–2016Patents assigned to CHOI JINHO (8)· patent assignee history
2013–2018Based in Palo Alto, CA, US· patent location history
2014–2016Patents assigned to SUTARDJA PANTAS (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MARVELL WORLD TRADE LTD352013–2017
MARVELL INT LTD222013–2018
ZHANG WANFENGself202013–2016
CHOI JINHO82013–2016
SUTARDJA PANTAS42014–2016
Locations
LocationPatentsSpan
Palo Alto, California, US562013–2018
Kingston, CA22008–2009