Inventor

QIU YIFENG

US68 patents

⚠️ This page may combine multiple inventors who share the name “QIU YIFENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

QIU YIFENG

LUMILEDS LLC

Hybrid driving scheme for RGB color tuning

Wireless color tuning for constant-current driver

Dim-to-warm LED circuit

Illumination system including tunable light engine

Light fixture with dynamically controllable light distribution

Wireless color tuning for constant-current driver

Wireless color tuning for constant-current driver

Dim-to-warm LED circuit

Hybrid driving scheme for RGB color tuning

Time slicing method for multi-channel color tuning using a single current source input

Lighting apparatus with reduced abrupt brightness changes

Illumination system including tunable light engine

Control design for perceptually uniform color tuning

Offline lighting configuration tool

Method for wide-range CCT tuning that follows the black body line using two independently controlled current channels and three CCTs

Illumination system including tunable light engine

LED-based light fixture

Arbitrary-ratio analog current division circuit

Cuttable LED strip

LED-based light fixture

Lighting system including a power backup device

Lighting system including a power backup device

Light engines with dynamically controllable light distribution

Light fixture with dynamically controllable light distribution

Dim to warm controller for LEDs

Light engines with dynamically controllable light distribution

Light fixture with dynamically controllable light distribution

Dim to warm controller for LEDs

Dim to warm controller for LEDs

User control modality for LED color tuning

Multi-pad, multi-junction LED package

Flexible low Z-height LED arrays with controllable light beams

Dimming LED circuit augmenting DC/DC controller integrated circuit

Wireless color tuning for constant-current driver

Light engines with dynamically controllable light distribution

Light engines with dynamically controllable light distribution

Wide beam angle LED assembly

Method for wide-range CCT tuning that follows the black body line using two independently controlled current channels and three CCTs

Control design for perceptually uniform color tuning

Lighting apparatus with reduced abrupt brightness changes

Method for wide-range CCT tuning that follows the black body line using two independently controlled current channels and three CCTs

Lighting system including a power backup device

Wide beam angle LED assembly

Offline lighting configuration tool

LUMILEDS HOLDING BV

Hybrid driving scheme for RGB color tuning

Selecting parameters in a color-tuning application

Light engines with dynamically controllable light distribution

Light engines with dynamically controllable light distribution

PHILIPS LIGHTING HOLDING BV

Radio frequency (RF) controlled lamp with dimmer compatibility

RADERMACHER HARALD JOSEF GUNTHER

Driving device and method for driving a load, in particular an LED assembly