Signify Holding B.v.

Siren Care, Inc.

Philips Lighting Holding B.v.

Analog Devices,inc.

Invensense, Inc.

Delta Electronics (Shanghai) Co., Ltd

Spreadtrum Communications (Shanghai) Co., Ltd.

Delta Electronics, Inc.

Jie Fu

Gang Wang

Ran Ma

Zhiquan Chen

Henk Jan Scholten

Shu Xu

Yu Wang

Liang Shi

Shan Shan Wang

Xiao Sun

Shiguang Sun

Yang Pan

Paul R Veldman

Marcus Cornelis Van Meel

Raimundo De Heer Galisteo

Xuening Shen

Ming Hsi Wang

Harald Josef Günther Radermacher

Jian-Ping Ying

Hong-Jian Gan

Khiem Quang Nguyen

Zhi Quan Chen

Dmytro Viktorovych Malyna

Yuanqiang Liu

Junhu Liu

Dongqin Yan

Wei-Liang Fu

Ping Kian Bee

Feng Ju

Haimin Tao

Martinus Petrus Joseph Peeters

Zeng Li

Dragan Sekulovski

Marco Haverlag

Peter Alexander Duine

René Theodorus Wegh

Chun Yang

Rémy Cyrille Broersma

Tijmen Cornelis Van Bodegraven

Xianhui Zhang

Simon Jacobus Maria Kuppens

Julia Delos Ayllon

Herman Johannes Gertrudis Gielen

Kelvin Wang

Malgorzata Perz

Xiaoting Zhu

Luna X Zhang

Yun Fei Duan

Jimmy Jiang

Jiang Junmin

Junmin Jiang

Yongyi Wu

Fan Zheng

Yuangiang Liu

Gu Yuan Chen

Jian Longqui

A driving arrangement is provided for driving a load, comprising a driver input for receiving an input power and a driver output to be coupled to the load. A high frequency switch mode PFC converter converts the input power to a PFC converter power and a high frequency switch mode regulator has an output connected in series with the output of the PFC converter. A superimposed power from the PFC converter and the regulator with synchronized high frequency switching is provided to the load. This enables a high frequency ripple to be at least partially cancelled. Wherein the charging phase of the PFC converter at least partially overlaps with the first phase of the regulator in which phase the regulated power increases.

Driver for driving a load, such as a LED load

One variation of a method for detecting inflammation in a foot includes: accessing a first temperature measured through a left temperature sensor and a second temperature measured through a right temperature sensor at approximately a first time, the left temperature sensor arranged in a left sock and the right temperature sensor arranged in a right sock worn on the user's feet; calculating a baseline difference between the first and second temperatures based on confirmation of absence of inflammation in the user's left and right feet at the first time; accessing a third temperature measured through the left temperature sensor and a fourth temperature measured through the right temperature sensor at approximately a second time; and in response to a second temperature difference—between the third and fourth temperatures—differing from the baseline difference by more than a threshold difference, issuing an alarm through the user interface.

System and method for detecting inflammation in a foot

To provide a safer over voltage protection, it is provided a driving circuit for a light emitting source, comprising an input adapted to receive a power supply; a conversion circuit, adapted to convert the power supply and provide a converted power, comprising a power switch (M); an output, adapted to output the converted power; an output capacitor (C) connected at the output; a first control circuit coupled to the output and connected to the power switch (M), adapted to sense a voltage corresponding to the voltage on the output capacitor and control the power switch operate in a power-reducing mode to reduce the converted power when the voltage corresponding to the voltage on the output capacitor sensed by the first control circuit exceeds a first level; and a second control circuit (D) connected to the output capacitor (C) and connected to a control terminal of the power switch (M), adapted to sense a voltage at the output capacitor (C) and damage and make the power switch (M) unoperational permanently when the voltage at the output capacitor (C) sensed by the second control circuit exceeds a second level.

LED driving circuit and LED lighting circuit

A driver circuit is for driving a GaN power commutation switch of a switch mode power converter. A sensing component is connected to the GaN switch for sensing a parameter such as a peak current of the power commutation. An energy storage component provides a certain turn on voltage between the gate and source of the GaN switch. The charging and discharging of the energy storage component is regulated, and the sensing is disabled with timing which is synchronized with the charging and discharging function of the energy storage component. It is prevented that a voltage across the sensing component reduces the generated gate-source drive voltage of the GaN switch.

Driver circuit for a GaN switch mode power converter

A boost converter has a main energy storage inductor and a main GaN boost switch with a node between them. A pre-charging switch is connected at the output side of the main boost switch and the inductor, between the node and an output capacitor. The pre-charging switch comprises a body diode in the forward direction from the output capacitor to the node. The output capacitor is charged by the pre-charging switch in a pre-charge phase and this provides a soft start-up to avoid large inrush currents. A third switch, which is also a GaN switch, is in series with the pre-charging switch to provide synchronous output rectification. The third switch has a body diode in a forward direction from the node to the output capacitor. In the pre-charge phase, both the boost switch and third switch are turned off whereas in a subsequent boost phase, the pre-charging switch is turned constantly on, and alternately the boost switch and the third switch are turned on and off to implement the boost conversion.

Boost converter and method of controlling a boost converter

A system for monitoring a user includes a garment configured to be placed on a foot of the user, a cover coupled to the garment, and a sensor arrangement between the garment and the cover, wherein the sensor arrangement comprises at least one temperature sensor to measure at least one temperature on the foot of the user. A method for making a system for monitoring a user includes forming a sensor arrangement including at least one sensor lead coupled to a temperature sensor, positioning at least a portion of the sensor arrangement on a garment configured to be placed on a foot of the user, and enclosing at least the portion of the sensor arrangement between the garment and a cover.

Sensing garment and method for making same

An LED driver for an LED lamp, which also comprises an LED load. The LED driver is adapted to connect to an input source at a first and second terminal. The LED driver comprises a switching arrangement configured to enable a controller to control at least a magnitude and phase of the voltage between the first and second terminals. The phase of the voltage between the first and second terminals may be defined to control an amount of power that flows from the input source to power the LED lamp.

LED driver for LED lighting systems for replacing a high-intensity discharge lamp

One variation of a method for producing a smart yarn includes: aligning a set of sensing elements offset along a lateral axis in a magazine, wherein each sensing element in the set of sensing elements includes a sensor, a first conductive lead extending from a first side of the sensor along a longitudinal axis perpendicular to the lateral axis, and a second conductive lead extending from a second side of the sensor opposite the first side and along the longitudinal axis; wrapping a set of fibers into a yarn within a wrapping field; feeding a leading end of a first sensing element, in the set of sensing elements, from the magazine into the wrapping field; releasing the first sensing element from the magazine into the wrapping field; encasing the first sensing element between the set of fibers within the yarn; and repeating this process for the set of sensing elements.

Smart yarn and method for manufacturing a yarn containing an electronic device

An LED driver that is operable with two different types of power source originally designed for a high-intensity discharge lamp. The LED driver directs current of an input power provided by the power source down a first current path if it is determined that the power source comprises a functional ignitor. The LED driver directs current of an input power provided by the power source down a second current path if it is determined that thepower source does not comprise a functional ignitor.

LED driver for LED lighting units for replacing a high-intensity discharge lamp

A device for determining a type of a power source for powering a LED lighting unit, wherein one possible type comprises a ballast originally designed for a high intensity discharge lamp and repurposed for use with an LED lighting unit. The power source type determiner monitors at least one electrical parameter of either a load or the power source itself after a power drawn by the load whose characteristic is set to a critical value. A value of the electrical parameter is used to identify a type of the power source. A value of the electrical parameter is the pulse generated by the traditional ballast for gas discharge lamp, which pulse is detected to determine the type of the power source.

Power source type determiner

A driver arrangement is provided for a LED lighting device with a LED light source and at least one additional auxiliary module. The driver arrangement comprises separate main and auxiliary drivers. The delivery of power from the auxiliary driver is controlled to either an auxiliary power output or to both a main power output and the auxiliary power output. Each driver can be optimized for the load it is required to drive. The device may overall be more efficient in a low power auxiliary mode, by using a driver suited for such low power operation. In particular when the power demand of the LED light source is low, the auxiliary driver may be used.

Driver arrangement for a LED lighting device, a lighting device using the same and a drive method

Sensing garment

A LED driving circuit () is for driving at least two LED segments () of different color or color temperature, using an input current which has a current ripple amplitude. The LED driving circuit () comprises an input to receive the input current; an output to connect to the at least two LED segments (); 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.

LED driving circuit

Growing community of inventors

Shanghai, China

Jie Fu