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1. 发明申请

US20200236761A1 A CONTROLLABLE DRIVER AND DRIVE METHOD 审中-公开
公开(公告)号：US20200236761A1
公开(公告)日：2020-07-23
申请号：US16651103
申请日：2018-09-25
申请人： SIGNIFY HOLDING B.V.
发明人： LIANG SHI , ADRIANUS JOHANNES STEPHANUS MARIA DE VAAN , PIETER JOHANNES STOBBELAAR , XIANHUI ZHANG , PAUL ROBERT VELDMAN , HUI ZHENG , GANG WANG
IPC分类号： H05B45/325 , H03F3/45 , H03F1/56 , H03F1/02
摘要： 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.

2. 发明申请

US20220030687A1 TAPPED LINEAR DRIVER AND DRIVING METHOD 有权
公开(公告)号：US20220030687A1
公开(公告)日：2022-01-27
申请号：US17276694
申请日：2019-09-03
申请人： SIGNIFY HOLDING B.V.
发明人： SHAN WANG , KELVIN WANG , LIANG SHI , ZHI QUAN CHEN , JOHN DAI
IPC分类号： H05B45/48 , H05B45/50 , H05B45/397
摘要： A LED lighting circuit has a plurality of LED segments connected in series. A switching arrangement is used to selectively bypass at least one LED segment to implement a tapped linear driver approach. Degrading of a component in the LED lighting circuit is detected, so that a first TLD current modulation scheme is implemented when no such degrading is detected whereas a second current modulation scheme, different from the first current modulation scheme, is implemented to compensate for said degrading. Said degrading is leading to an increase in a turning on voltage of one LED segment, and compared to said first current modulation scheme, said second current modulation scheme has a higher voltage threshold at which said LED segment is switched. In this way, protection may be provided for circuit components and the light output may be maintained at the desired level in the event of component degrading, such as LED chip failure or contact resistance changes.

3. 发明申请

US20210282242A1 LED DRIVING CIRCUIT 有权
公开(公告)号：US20210282242A1
公开(公告)日：2021-09-09
申请号：US17269047
申请日：2019-08-12
申请人： SIGNIFY HOLDING B.V.
发明人： LIANG SHI , JIE FU , KELVIN WANG
IPC分类号： H05B45/36 , H05B45/20 , H05B45/395 , H05B45/325
摘要： A LED driving circuit (20) is for driving at least two LED segments (22, 24) of different color or color temperature, using an input current which has a current ripple amplitude. The LED driving circuit (20) comprises an input to receive the input current; an output to connect to the at least two LED segments (22, 24); and a current distributing circuit which provides the input current to a single one of the two LED segments when the current is at a peak portion, wherein the current distributing circuit is adapted, when providing the input current to a single one of the two LED segments during the peak portion, to provide the input current to the single one of the two LED segments alternately, and splits the input current into two non-zero currents for different LED segments when the current is in a trough. When all current is provided to one LED segment, the light conversion efficiency is lower than when two segments are driven with lower current. This means the effect which the current ripple has on the light output is reduced. The driving circuit effectively compensates for the current ripple by adjusting the light conversion efficiency so that a flatter light output characteristic is obtained.

4. 发明申请

US20210168920A1 MICROWAVE SENSOR DEVICE, AND SENSING METHODS, AND LIGHTING SYSTEM USING THE SENSOR DEVICE 有权
公开(公告)号：US20210168920A1
公开(公告)日：2021-06-03
申请号：US17268563
申请日：2019-07-31
申请人： SIGNIFY HOLDING B.V.
发明人： LIANG SHI , RANG JIAN DING , GANG WANG , SHOAIB KHAN , FETZE PIJLMAN
IPC分类号： H05B47/115 , H05B47/19 , H05B47/155 , G01S17/50 , G01S17/86
摘要： A microwave sensor device is for detecting activity and for sending and/or receiving a communications signal to/from a second microwave sensor device. A microwave transceiver is used for transmitting a microwave transmit signal and for receiving a microwave receive signal. For motion detection, the microwave receive signal is a reflected version of the microwave transmit signal and the signals are processed to identify first signal characteristics. For communication, the microwave transmit signal is a communications signal for detection at another sensor device. The transmit and microwave receive signals are processed to identify second characteristics. This sensor device detects motion and also transmits and/or receives a communications signal using the same transceiver. In particular, the communications signal is designed to be detected by a remote sensor device in the same way as for motion detection.

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