公开(公告)号：US20200041076A1

公开(公告)日：2020-02-06

申请号：US16485191

申请日：2018-02-14

Applicant: SIGNIFY HOLDING B.V.

Inventor： HENRICUS THEODORUS VAN DER ZANDEN ,  BERND ACKERMANN ,  THEODORUS JOHANNES PETRUS VAN DEN BIGGELAAR ,  HAIMIN TAO ,  PIETER JOHANNES STOBBELAAR

IPC: F21K9/278 ,  H05B37/02 ,  H05B33/08

Abstract: A retrofit Light Emitting Diode, LED, lighting device for connection to an electronic ballast is presented. Wherein the LED lighting device comprises a steady state mode during which it emits light and a standby mode during which it is not emitting light. The retrofit LED lighting device comprises an LED array for emitting light during said steady state mode; an alternating current, AC, LED driver arranged for receiving an AC supply voltage, from said electronic ballast during said steady state mode and for driving said LED array based on said received AC supply voltage. It also comprises of a filament circuit arranged for receiving said AC supply voltage from said electronic ballast and for supporting a filament current circulating back to said electronic ballast for indicating a presence said lighting device to said electronic ballast, and a lamp current to said AC LED driver for driving said LED array for emitting said light during said steady state mode. Additionally, the retrofit LED lighting device also comprise of a lamp removal simulation circuit arranged for simulating an absence of said LED lighting device to said electronic ballast by interrupting at least one of said filament current and said lamp current, during said standby mode. A corresponding method and system of retrofitting LEDs are also presented.

公开(公告)号：US20240267132A1

公开(公告)日：2024-08-08

申请号：US18567949

申请日：2022-06-03

Applicant: SIGNIFY HOLDING B.V.

Inventor： HAIMIN TAO ,  CHRISTOPH GERARD AUGUST HOELEN ,  PIETER JOHANNES STOBBELAAR

IPC: H04B10/80 ,  H04B10/40

CPC classification number: H04B10/806 ,  H04B10/40

Abstract: An optical front end, OFE, module (200) for use in an optical wirelesscommunication, OWC, system (100), the OFE module (200) comprising: an optical transmitter (210) comprising a light source (211) for transmitting optical signals; an optical receiver (220) comprising a light sensor (221) for receiving optical signals;a control circuit (230) configured to: connect to a USB On-The-Go, OTG, interface (231) comprising a differential data path (232) and an ID signal (233); route signals received on the differential data path (232) to an input of the optical transmitter (210) and signals received on an output of the optical receiver (220) to the differential Q data path (232); control a power-up sequence of the OFE module (200), which defines that the OFE module (200) is initialized by powering up the optical receiver (220) first for detecting an optical test signal within an ID detection period; set the ID signal (233) to GND and latch the ID signal (233) when the optical test signal is received within the ID detection period; set the ID signal (233) to Float and latch the ID signal (233) when no optical test signal is received within the ID detection period.

公开(公告)号：US20230379056A1

公开(公告)日：2023-11-23

申请号：US18030416

申请日：2021-09-30

Applicant: SIGNIFY HOLDING B.V.

Inventor： MATTHIAS WENDT ,  PIETER JOHANNES STOBBELAAR ,  PAUL HENRICUS JOHANNES MARIA VAN VOORTHUISEN

IPC: H04B10/40 ,  H04B10/079

CPC classification number: H04B10/40 ,  H04B10/07953

Abstract: An optical wireless communication module comprising a plurality of optical transceivers and a controller, wherein the controller is configured to determine the optical transceivers to be used based on movement information of a UE, to activate the optical transceivers to be used and to deactivate other optical transceivers, such that it consumes less energy without compromising Quality of Service.

公开(公告)号：US20200236761A1

公开(公告)日：2020-07-23

申请号：US16651103

申请日：2018-09-25

Applicant: SIGNIFY HOLDING B.V.

Inventor： LIANG SHI ,  ADRIANUS JOHANNES STEPHANUS MARIA DE VAAN ,  PIETER JOHANNES STOBBELAAR ,  XIANHUI ZHANG ,  PAUL ROBERT VELDMAN ,  HUI ZHENG ,  GANG WANG

IPC: H05B45/325 ,  H03F3/45 ,  H03F1/56 ,  H03F1/02

Abstract: A control circuit, of a control loop, for a lighting driver. The lighting driver is adapted to controllably connect an electronic ballast to an LED light source or lamp. The control circuit comprises a biasing circuit having an adjustable impedance. A tuning circuit adjusts the impedance of the biasing circuit so as to tune a parameter of a frequency response of the control loop and thereby of the lighting driver.

公开(公告)号：US20200214107A1

公开(公告)日：2020-07-02

申请号：US16632892

申请日：2018-07-16

Applicant: SIGNIFY HOLDING B.V.

Inventor： BERND ACKERMANN ,  THEODORUS JOHANNES PETRUS VAN DEN BIGGELAAR ,  PIETER JOHANNES STOBBELAAR ,  HAIMIN TAO ,  HENRICUS THEODORUS VAN DER ZANDEN

IPC: H05B45/3725 ,  F21K9/278 ,  H05B47/19 ,  H05B45/3578 ,  H02J7/00

Abstract: A retrofit tubular lighting device (7), comprising first (p1, p2) and second connection pins (p3, p4), a first (12) and second filament emulation circuit (13) coupled to the first (p1, p2) and second connection pins (p3, p4) respectively, a lighting element (4), a driver (3) coupled to the first (12) and second filament emulation circuit (13), a battery (5) and the lighting element (4). The driver (3) provides a charge to the lighting element (4) and the battery (5). The battery (5) stores the charge provided by the driver (3) and provides charge to the lighting element (4). A communication device sends a first charging signal to another lighting device comprising a further battery and coupled to the electronic ballast, when the charge of the battery (5) is below a first threshold. The communication device receives a second charging signal from the other lighting device, wherein the second charging signal indicates that a further charge of the further battery is below a second threshold. At least one of the first and second filament emulation circuit provides power from the electronic ballast (2) to the driver (3) when the communication device receives the second charging signal.

公开(公告)号：US20250096893A1

公开(公告)日：2025-03-20

申请号：US18728926

申请日：2023-01-12

Applicant: SIGNIFY HOLDING B.V.

Inventor： MATTHIAS WENDT ,  PIETER JOHANNES STOBBELAAR

IPC: H04B10/114 ,  H04B10/27 ,  H04W28/02

Abstract: A control system is provided for an optical wireless communications system comprising a plurality of optical communications access points, APs, (102) which have a combined field of view which defines a coverage area, wherein the APs are for communicating with end devices, EDs, (204) over a communications medium of an optical wireless local area network. At least one ED is movable through the coverage area and thereby is in communications range of different APs along a path through the coverage area. The controller obtains a topology of a movable area, wherein the movable area is defined by the physical space through which a movable ED may move. An AP is identified which has a movable ED in its field of view (210), and then a first sub-set of the APs is activated which are determined as possibly being next along the path through the movable area from the identified AP. A second subset of the APs are determined not to be next along the path through the movable area. and they are switched to a reduced power mode.

公开(公告)号：US20230275660A1

公开(公告)日：2023-08-31

申请号：US18015045

申请日：2021-07-05

Applicant: SIGNIFY HOLDING B.V.

Inventor： MATTHIAS WENDT ,  PIETER JOHANNES STOBBELAAR

IPC: H04B10/116 ,  H04B10/40

CPC classification number: H04B10/116 ,  H04B10/40

Abstract: An Optical Wireless Communication, OWC, system uses a receiving unit having a motion sensor for sensing motion and orientation of the receiving unit. A controller of the system (which may be part of a receiving unit or a transmitting unit or external to both) is configured to derive a prediction of the future orientation and position of the receiving unit, while receiving data from a transmitting unit. From the prediction, a different transmitting unit of the set may be selected for future data transfer and/or a different communication system may be selected for future data transfer.

公开(公告)号：US20200015333A1

公开(公告)日：2020-01-09

申请号：US16489042

申请日：2018-03-05

Applicant: SIGNIFY HOLDING B.V.

Inventor： BERND ACKERMANN ,  MATTHIAS WENDT ,  GOUTAM MAJI ,  THEODORUS JOHANNES PETRUS VAN DEN BIGGELAAR ,  HARALD JOSEF GUNTHER RADERMACHER ,  PIETER JOHANNES STOBBELAAR ,  PRIYA RANJAN MISHRA ,  HAIMIN TAO ,  HENRY THEODORUS VAN DER ZANDEN

IPC: H05B33/08 ,  F21K9/278

Abstract: A lighting device (7) comprises an input terminal for receiving an input power, a power converter (5) for receiving the input power from the input terminal, and for transforming the input power into a charging power and a supply power, an energy storage device (11) for receiving the charging power and for providing a discharging power. The lighting device (7) further comprises an LED load (9) for receiving the supply power and the discharging power, wherein the lighting device (7) is arranged to be operated in a first mode and in a second mode, wherein in the first mode the LED load (9) is arranged to receive the supply power from the power conversion unit, and the energy storage device (11) is arranged to receive the charging power from the power converter, wherein in the second mode the LED load (9) is arranged to receive the discharging power from the energy storage device. The lighting device (7) further comprises a controller (13) for monitoring a charge level of the energy storage device, and for switching the lighting device (7) into the first mode when the charge level is below a lower threshold level (THL) and into the second mode when the charge level exceeds an upper threshold level (THU), the upper threshold level (THU) being higher than the lower threshold level (THL) and for disconnecting in the second mode the power converter (5) from the input terminal.