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    AUTO-CONFIGURATION OF USB HOST AND PERIPHERAL ROLES IN AN OPTICAL FRONT-END MODULE
    1.
    发明公开
    AUTO-CONFIGURATION OF USB HOST AND PERIPHERAL ROLES IN AN OPTICAL FRONT-END MODULE 审中-公开

    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.

    RETROFIT LED LIGHTING DEVICE HAVING IMPROVED TIMING EVENT DETECTION FOR INCREASING STABLE DRIVER OPERATION WITHOUT LIGHT FLICKER
    2.
    发明申请
    RETROFIT LED LIGHTING DEVICE HAVING IMPROVED TIMING EVENT DETECTION FOR INCREASING STABLE DRIVER OPERATION WITHOUT LIGHT FLICKER 有权

    公开(公告)号：US20210136893A1

    公开(公告)日：2021-05-06

    申请号：US16640094

    申请日：2018-08-16

    Applicant: SIGNIFY HOLDING B.V.

    Inventor： FRITS TOBI DE JONGH ,  HAIMIN TAO ,  DMYTRO VIKTOROVYCH MALYNA

    IPC: H05B45/37 ,  H05B45/3578 ,  H05B45/50

    Abstract: A retrofit Light Emitting Diode, LED, lighting device for connection to a ballast, wherein said ballast is arranged to provide for a ballast current, said retrofit LED lighting device comprising at least one LED for emitting light, a rectifier arranged for rectifying said ballast current and for providing a lamp current to said at least one LED, a shunt switch for shunting said at least one LED thereby preventing said lamp current to flow through said at least one LED, a control unit for controlling said shunt switch, wherein said control unit is arranged to detect a particular amplitude offset current level in one of said ballast current and said lamp current, said particular amplitude offset current level being a particular non-zero value of said ballast current or said lamp current and to activate said shunt switch triggered by said detection.

    AN OPTICAL WIRELESS COMMUNICATION SYSTEM
    4.
    发明申请
    AN OPTICAL WIRELESS COMMUNICATION SYSTEM 有权

    公开(公告)号：US20250125880A1

    公开(公告)日：2025-04-17

    申请号：US18693280

    申请日：2022-09-16

    Applicant: SIGNIFY HOLDING B.V.

    Inventor： HAIMIN TAO ,  KARNEKUMAR ARULANDU ,  AMIR MASOOD KHALID

    IPC: H04B10/69 ,  H04B10/50

    Abstract: An optical wireless communications transmitter comprising a laser diode (82) such as vertical cavity surface emitting laser, VCSEL, a bias current delivery circuit (85) for delivering a bias current to the VCSEL, a modulator (81) for injecting a modulation current to the VCSEL superposed with the bias current and a temperature sensor for sensing a temperature associated with the VCSEL. A controller (84) is adapted to set the bias current and the current modulation depth in dependence on the sensed temperature to achieve a target operating condition in the form of a data transmissions rate and where the bias current is set to a lowest possible level with the current modulation depth selected, and when a higher data transmission rate is needed the modulation depth is increased taking into account a current upper limit.

    A LIFI MODULE, A MOBILE DEVICE COMPRISING THE LIFI MODULE AND A METHOD OF INITIATING HANDOVER OF THE USER DEVICE
    5.
    发明申请
    A LIFI MODULE, A MOBILE DEVICE COMPRISING THE LIFI MODULE AND A METHOD OF INITIATING HANDOVER OF THE USER DEVICE 有权

    公开(公告)号：US20240380486A1

    公开(公告)日：2024-11-14

    申请号：US18686902

    申请日：2022-08-23

    Applicant: SIGNIFY HOLDING B.V.

    Inventor： HAIMIN TAO

    IPC: H04B10/11

    Abstract: A LiFi module for operatively connecting to a WiFi communication module supporting both Wi-Fi and Li-Fi connections is disclosed. The LiFi module comprising an optical front end, OFE, and a connection circuit for communicatively connecting the OFE to the WiFi communication module. The connection circuit comprises a switching component electrically connected to a LiFi signal strength detector and configured to enable or disable a connection between the OFE and the WiFi communication module, under control of the LiFi signal strength detector; and the LiFi signal strength detector electrically connected to the switching component and a receive path of the OFE and configured to detect a strength of an optical signal received at the receive path of the OFE and to control the switching component based on the detected strength of the optical signal.

    A LIGHTING DRIVE, LIGHTING SYSTEM AND CONTROL METHOD
    6.
    发明申请
    A LIGHTING DRIVE, LIGHTING SYSTEM AND CONTROL METHOD 有权

    公开(公告)号：US20210092808A1

    公开(公告)日：2021-03-25

    申请号：US16954308

    申请日：2018-12-21

    Applicant: SIGNIFY HOLDING B.V.

    Inventor： ZHI QUAN CHEN ,  XIANHUI ZHANG ,  HAIMIN TAO ,  HUI ZHENG

    IPC: H05B45/14 ,  H05B45/357

    Abstract: A lighting driver is for receiving an alternating current power supply from a fluorescent lighting ballast. A shunt device is provided for selectively shunting the power supply to implement dimming control. A detector is provided for generating a detection signal and for providing the detection signal to the control circuit to operate the shunt device. The detector has a detection circuit for analyzing a voltage at the driver input and generating 5 the detection signal accordingly, when the voltage is detected. In addition, for situations where the voltage detection does not correctly generate the detection signal, a correction circuit generates the detection signal for a time delay from the end of operating the shunt device. This prevents control stability problems at low dimming levels.

    A RETROFIT LIGHT EMITTING DIODE, LED, LIGHTING DEVICE FOR CONNECTION TO AN ELECTRONIC BALLASE
    8.
    发明申请
    A RETROFIT LIGHT EMITTING DIODE, LED, LIGHTING DEVICE FOR CONNECTION TO AN ELECTRONIC BALLASE 审中-公开

    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.

    TUBULAR LIGHTING DEVICE, LUMINAIRE AND METHOD FOR OPERATING WITH AN ELECTRONIC BALLAST
    10.
    发明申请
    TUBULAR LIGHTING DEVICE, LUMINAIRE AND METHOD FOR OPERATING WITH AN ELECTRONIC BALLAST 审中-公开

    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.

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