2024

  1. Light engines with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Apr 2024
    US Patent 11,946,616
  2. LED lighting module
    Nicola Bettina Pfeffer, Frederic Stephane Diana, Kevin-Gx Jiao, and 4 more authors
    May 2024
    US Patent 11,982,431
  3. Wireless color tuning for constant-current driver
    Yifeng Qiu
    Jan 2024
    US Patent App. 18/219,508

2023

  1. Unversal dimming emulator for LED driver
    Yifeng Qiu
    Jun 2023
    US Patent 11,683,870
  2. Wide beam angle LED assembly
    Yifeng Qiu
    Nov 2023
    US Patent 11,808,444
  3. Wireless color tuning for constant-current driver
    Yifeng Qiu
    Aug 2023
    US Patent 11,743,980
  4. Method for wide-range CCT tuning that follows the black body line using two independently controlled current channels and three CCTs
    Frederic Stephane Diana, and Yifeng Qiu
    Jul 2023
    US Patent 11,700,679
  5. Light engines with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Nov 2023
    US Patent 11,807,162

2022

  1. Method for wide-range CCT tuning that follows the black body line using two independently controlled current channels and three CCTs
    Frederic Stephane Diana, and Yifeng Qiu
    Aug 2022
    US Patent 11,432,382
  2. Wireless color tuning for constant-current driver
    Yifeng Qiu
    Oct 2022
    US Patent 11,477,864
  3. Light engines with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Nov 2022
    US Patent 11,485,283
  4. Hybrid driving scheme for RGB color tuning
    Yifeng Qiu, and John Grant
    Feb 2022
    US Patent 11,240,895
  5. Control design for perceptually uniform color tuning
    Yifeng Qiu
    Dec 2022
    US Patent 11,523,482
  6. Ultraviolet therapy with white tuning
    Yifeng Qiu, and Noman Rangwala
    Apr 2022
    US Patent App. 17/502,528
  7. Lighting apparatus with reduced abrupt brightness changes
    Yifeng Qiu, and Alan Andrew McReynolds
    Nov 2022
    US Patent 11,510,302
  8. Rayleigh spacing limited and low z-height LED arrays
    Sudhir Subramanya, Willem Sillevis-Smitt, Frederic Diana, and 3 more authors
    Apr 2022
    US Patent 11,314,012
  9. Flexible low Z-height LED arrays with controllable light beams
    Sudhir Subramanya, Willem Sillevis-Smitt, Frederic Diana, and 3 more authors
    May 2022
    US Patent 11,333,821
  10. Wide beam angle LED assembly
    Yifeng Qiu
    Jun 2022
    US Patent 11,371,687
  11. Low z-height led arrays with controllable light beams
    Sudhir Subramanya, Willem Sillevis-Smitt, Frederic Diana, and 3 more authors
    Jul 2022
    US Patent App. 17/703,266
  12. Lighting system including a power backup device
    Yifeng Qiu
    Aug 2022
    US Patent 11,404,903

2021

  1. Dimming LED circuit augmenting DC/DC controller integrated circuit
    Zhihua Song, Wouter Soer, Ron Bonne, and 1 more author
    Mar 2021
    US Patent 10,959,306
  2. Light fixture with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Mar 2021
    US Patent 10,943,945
  3. Cuttable LED strip
    Yifeng Qiu, and Frederic Stephane Diana
    Aug 2021
    US Patent 11,098,860
  4. Arbitrary-ratio analog current division circuit
    Yifeng Qiu
    Aug 2021
    US Patent 11,109,457
  5. Time slicing method for multi-channel color tuning using a single current source input
    Yifeng Qiu, and Alan Andrew McReynolds
    Sep 2021
    US Patent 11,116,055
  6. LED-based light fixture
    Jeroen Den Breejen, and Yifeng Qiu
    Apr 2021
    US Patent 10,976,481
  7. Hybrid driving scheme for RGB color tuning
    Yifeng Qiu, and John Grant
    Oct 2021
    US Patent 11,140,758
  8. Illumination system including tunable light engine
    Yifeng Qiu
    Feb 2021
    US Patent 10,925,129
  9. Selecting parameters in a color-tuning application
    Yifeng Qiu
    May 2021
    US Patent 10,999,907
  10. User control modality for LED color tuning
    Yifeng Qiu, and Johannes Willem Herman Sillevis Smitt
    Jul 2021
    US Patent 11,076,461
  11. Dim-to-warm LED circuit
    Yifeng Qiu
    Nov 2021
    US Patent 11,172,558
  12. Control design for perceptually uniform color tuning
    Yifeng Qiu
    Feb 2021
    US Patent 10,912,171
  13. Method of configuring lighting using offline lighting configuration tool
    Alan Andrew McReynolds, and Yifeng Qiu
    Feb 2021
    US Patent 10,917,957
  14. Offline lighting configuration tool
    Alan Andrew McReynolds, and Yifeng Qiu
    Dec 2021
    US Patent 11,202,356
  15. Lighting apparatus with reduced abrupt brightness changes
    Yifeng Qiu, and Alan Andrew McReynolds
    Aug 2021
    US Patent 11,109,468

2020

  1. Driver with at least four different states
    Yifeng Qiu, and Pieter Gerrit Blanken
    Apr 2020
    US Patent 10,624,159
  2. Method for wide-range CCT tuning that follows the black body line using two independently controlled current channels and three CCTs
    Frederic S Diana, and Yifeng Qiu
    Jul 2020
    US Patent 10,716,183
  3. Printed circuit board for integrated LED driver
    Zhihua Song, Wouter Anthon Soer, Ron Bonne, and 1 more author
    Jul 2020
  4. Radio frequency (RF) controlled lamp with dimmer compatibility
    Johan-paul Marie Gerard Linnartz, Peter Deixler, Yifeng Qiu, and 1 more author
    May 2020
    US Patent 10,652,970
  5. Printed circuit board for integrated LED driver
    Zhihua Song, Wouter Soer, Ron Bonne, and 1 more author
    Dec 2020
    US Patent 10,856,376
  6. Illumination system including tunable light engine
    Yifeng Qiu
    Jun 2020
    US Patent 10,674,576
  7. Dim to warm controller for LEDs
    Yifeng Qiu, and Jeroen Den Breejen
    Dec 2020
    US Patent 10,874,008
  8. Lighting system including a power backup device
    Yifeng Qiu
    Oct 2020
    US Patent 10,797,516
  9. Light engines with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Sep 2020
    US Patent 10,785,847
  10. Light fixture with light guide and radially emitting LEDs
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Dec 2020
    US Patent 10,859,757
  11. Light engines with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Dec 2020
    US Patent 10,872,923
  12. Light engines with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Nov 2020
    US Patent 10,821,890
  13. Light fixture with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Apr 2020
    US Patent 10,622,405
  14. Light fixture with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Aug 2020
    US Patent 10,750,588
  15. LED-based light fixture
    Jeroen Den Breejen, and Yifeng Qiu
    May 2020
    US Patent 10,641,941
  16. Light engines with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Nov 2020
    US Patent 10,845,529
  17. Arbitrary-ratio analog current division circuit
    Yifeng Qiu
    Mar 2020
    US Patent 10,588,194
  18. Selecting parameters in a color-tuning application
    Yifeng Qiu
    Feb 2020
    US Patent 10,555,395
  19. Dim-to-warm LED circuit
    Yifeng Qiu
    May 2020
    US Patent 10,652,962
  20. Light fixture with dynamically controllable light distribution
    Frederic Stephane Diana, Yifeng Qiu, Michael Wasilko, and 4 more authors
    Dec 2020
    US Patent 10,868,076
  21. Wireless color tuning for constant-current driver
    Yifeng Qiu
    Sep 2020
    US Patent 10,772,169
  22. Offline lighting configuration tool
    Alan Andrew McReynolds, and Yifeng Qiu
    Nov 2020
    US Patent 10,827,592

2019

  1. LED-based light fixture
    Jeroen Den Breejen, and Yifeng Qiu
    Oct 2019
    US Patent 10,444,421
  2. Radio frequency (rf) controlled lamp with dimmer compatibility
    Johan-paul Marie Gerard Linnartz, Peter Deixler, Yifeng Qiu, and 1 more author
    Jan 2019
    US Patent 10,182,488
  3. Lighting system including a power backup device
    Yifeng Qiu
    Feb 2019
    US Patent 10,205,342
  4. Cuttable LED strip
    Yifeng Qiu, and Frederic Stephane Diana
    Nov 2019
    US Patent 10,487,995
  5. Dim to warm controller for LEDs
    Yifeng Qiu, and Jeroen Den Breejen
    Apr 2019
    US Patent 10,257,904
  6. Hybrid driving scheme for RGB color tuning
    Yifeng Qiu, and John Grant
    Dec 2019
    US Patent 10,517,156

2018

  1. Multi-pad, multi-junction LED package
    Yifeng Qiu, Gregory Guth, and Jeroen Den Breejen
    Jul 2018
    US Patent 10,039,165
  2. Dim to warm controller for LEDs
    Yifeng Qiu, and Jeroen Den Breejen
    Jul 2018
    US Patent 10,034,346
  3. Lighting system including a power backup device
    Yifeng Qiu
    Jul 2018
    US Patent 10,027,166
  4. Printed circuit board for integrated LED driver
    Zhihua Song, Wouter Soer, Ron Bonne, and 1 more author
    Dec 2018
    US Patent 10,165,640
  5. Illumination system including tunable light engine
    Yifeng Qiu
    Nov 2018
    US Patent 10,136,489

2016

  1. Apparatus for controlling light module
    Johan-paul Marie Gerard Linnartz, Anteneh Alemu Abbo, and Yifeng Qiu
    Nov 2016
    US Patent 9,497,818

2015

  1. 5µW-to-10mW input power range inductive boost converter for indoor photovoltaic energy harvesting with integrated maximum power point tracking algorithm
    Yifeng Qiu, and CV Liempd
    ISSCC, San Francisco, CA, USA, Nov 2015

2014

  1. Driving device and method for driving a load, in particular an LED assembly
    Harald Josef Gunther Radermacher, Pieter Gerrit Blanken, Yifeng Qiu, and 3 more authors
    Dec 2014
    US Patent 8,917,027

2011

  1. op het Veld, B., Blanken, PG, & Van Hoof, C.(2011). 5 µW-to-10mW input power range inductive boost converter for indoor photovoltaic energy harvesting with integrated maximum power point tracking algorithm
    Yifeng Qiu, and C Van Liempd
    In IEEE international solid-state circuits conference digest of technical papers (ISSCC), Dec 2011