Signify Holding B.v.

Huawei Technologies Co., Limited

Telefonaktiebolaget Lm Ericsson (publ)

Philips Lighting Holding B.v.

Liang Shi

Jun Xu

Jie Fu

Gang Wang

Xiao Sun

Peiliang Dong

Kelvin Wang

Bin He

Yuangang Wang

Zhi Quan Chen

Shan Shan Wang

Ping Kian Bee

Zhongqiu Lin

Chun Xue

Dongfang Shan

John Dai

Fetze Pijlman

Junfeng Zhao

Paul R Veldman

Karl Torbjörn Wigren

Berend Jan Willem Ter Weeme

Theo Gerrit Zijlman

Xin Yan

Xianhui Zhang

Adrianus Johannes Stephanus Maria De Vaan

Lambertus Adrianus Marinus De Jong

You Li

Pieter Johannes Stobbelaar

Aart Jan Vroegop

Qiao Li

Aron Yu

Shoaib Hussain Khan

Fangmin Lu

Hsing Mean Sha

Hui Zheng

Wei Hong Zhao

Xiaolong Shen

Weilan Wang

Yejia Di

Aijun Yu

Linjiang Li

Jian Jiang

Jimmy Jiang

Congming Gao

Weihong Zhao

Rang Jian Ding

A device suspension method and a computing device are provided. In the method, before a device enters a suspended state, memory space occupied by a background process that is unrelated to a foreground process is released. In this way, the background process unrelated to the foreground process is not saved in a memory of the device. In other words, it reduces data stored in the memory when the device is suspended. Therefore, when the device needs to be woken up, only a relatively small amount of data needs to be read from the memory, and a working state can be rapidly restored. This can reduce a delay of reading data from the memory when the device is woken up, thereby accelerating a wakeup speed of the device. In addition, the data is stored in the memory when the device is suspended.

Device suspend method and computing device

A driving circuit comprises a switch mode power converter circuit to convert a supply voltage (e.g. rectified mains), including an energy storage component and a main control switch. The energy storage component discharges to provide a regulated DC current to an output load upon the switching of the main control switch. A time-varying offset is used to modulate the regulated current hereby controlling the voltage across the energy storage component. In this way, the voltage across the energy storage component is maintained above the supply voltage with a safety margin, and this is used to prevent input current spikes and hence prevent an efficiency reduction of the driver circuit.

Driving circuit, and LED circuit and a driving method

In order to reduce energy loss of a tapped linear driver, it is proposed an LED lighting circuit, comprising an input (Vbus, GND) adapted to receive an input voltage, a plurality of LED segments (LED, LED, LED, LED) connected in series and to the input, a buffer component (C) connected to an anode and a cathode of a series string of at least two of the plurality of LED segments with respective switches, a current source circuit (B) in series connection with a parallel connection of the buffer component (C) and the at least two LED segments, across the input; further comprising a further buffer component (C) across the current source circuit (B), wherein said buffer component (C) and the further buffer component (C) is in series connection.

LED lighting circuit and a lighting device comprising the same

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.

Tapped linear driver and driving method

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

An electronic device is for identifying a LED driver which is a switched mode power supply. For example the LED driver is part of an LED luminaire. An interface () is adapted to be coupled to a high frequency power commutation component of the switched mode power supply, for sensing the high frequency power commutation of the switched mode power supply in driving the LED. A mapping is made between identifications of LED drivers which are switched mode power supply and characteristics of the high frequency power commutations in driving the LED of a respective switched mode power supply. Thus, a LED driver which uses a switched mode power supply can be identified corresponding to extracted characteristics of the high frequency power commutations in driving the LED. This identification can be used for energy monitoring and fault diagnosis purposes, for use in a universal low cost LED driver.

Switched mode power supply identification

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.

Microwave sensor device, and sensing methods, and lighting system using the sensor device

The invention provides an antenna structure comprising a plurality of wire segments formed in a loop. Connecting units are provided between the wire segments, each of which is switchable between a conductive state and a reactive state. With the connecting units in the conductive state a loop antenna is formed with a first (longer) signal range and with the connecting units in the reactive state an antenna structure is formed with a second (shorter) signal range. Said reactive state is adapted to introduce a phase delay between the adjacent wire segments. This enables the same antenna to be used for long range signal communication and short range communication, for example for system configuration or commissioning. The antenna structure may be used with luminaires of a lighting system.

Antenna structure, for different range communication modes

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.

Controllable driver and drive method to connect an electronic ballast to an LED light source based on the model, type, or identity of the ballast

A flash memory controller refreshes memory blocks in a flash memory device by setting different refresh cycles for individual memory blocks in the flash memory device. The flash memory controller records a number of erase operations performed on each memory block of the flash memory device. Upon detecting that a bit error rate of a memory block is greater than a preset threshold, the flash memory controller determines a refresh cycle for the memory block based on recorded number of erase operations performed on the memory block, and then refreshes the memory block according to the refresh cycle.

Method and apparatus for refreshing flash memory device

A lighting module has a conducting track which is used to provide a current to lighting elements. The conducting track is also used as a source of a varying electromagnetic field for inductive power transfer, so that an external device may harvest energy from that field. A driver is used for providing a time-varying current which is adapted to illuminate the lighting elements and, in combination with the track configuration, is adapted to generate a varying electromagnetic field for inductive power transfer for energy harvesting by an external device.

Lighting module and method of controlling a lighting system

A method for accessing a flash memory device and a flash memory device. After receiving a write request for an address, a flash memory controller obtains an indicator of the address, where the indicator indicates a last access type of the address, which might be a write operation or a read operation. When determining the indicator indicates a write operation, which means the access type for the address is normally write operation, to save time, the flash memory controller perform a fast-write operation on the address, when the indicator indicates a read operation, which means there might be plenty of read operations on the address, to facilitate future read operation, the controller performs a slow-write operation on the address.

Method and apparatus for accessing flash memory device

A driver comprising a switched mode power supply, wherein said switched mode power supply comprises an existing coil, the driver circuit further comprises: a first power transmission antenna () formed as a first coil which is either the existing coil of the switched mode power supply or coupled to the existing coil of the switched mode power supply, said first power transmission antenna () is adapted for being magnetically coupled to a second power receiving antenna () thereby forming a wireless power transmitter.

Switched mode power supply driver integrated with a power transmission antenna

A method for processing a write request is disclosed, the method includes: determining, by an IO scheduler, that current IO scheduling is in a blocked state; selecting, by the IO scheduler, a target synchronous write request from to-be-processed IO requests; adding, by the IO scheduler, an acceleration flag to the target synchronous write request, where the acceleration flag is used to instruct a flash memory controller to perform acceleration processing on the target synchronous write request by using idle space of a flash memory; after the flash memory controller receives, from the IO scheduler, the target synchronous write request, determining, by the flash memory controller, a size of the idle space of the flash memory; and when the size of the idle space of the flash memory is greater than a threshold, performing, by the flash memory controller, acceleration processing on the target synchronous write request.

Method and mobile terminal for processing write request

A first LED driver circuit comprising: a first input interface () for receiving an AC power input and providing a first output, wherein said first output is adapted to be connected to a second LED driver circuit; a first LED driver () powered by the first output; a first shorting element () for shorting the first output; a first control arrangement () for controlling the first shorting element wherein the first control arrangement () is adapted to close the first shorting element () during only one subset of half cycles of the AC power input to short circuit the first LED driver () and to prevent the first LED driver () from being powered by the AC power input, when the second LED driver circuit is powered by the AC power input complementarily with respect to the unpowered first LED driver () and, open the first shorting element () during the other subset of half cycles to allow the AC power input to power the first LED driver (), when the second LED driver circuit is not powered by the AC power input complementarily with respect to the first LED driver (); wherein the half cycle is the positive amplitude duration or the negative amplitude duration of the AC power input This means two of the LED driver circuits may be used in series, each one is supplies by power or not complementarily based on only one subset of half cycles of the AC power input.

LED driver circuit, lighting arrangement and driving method

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Shanghai, China

Liang Shi