Results 71 to 80 of about 11,028,576 (294)

An Off-Line Single-Inductor Multiple-Outputs LED Driver with High Dimming Precision and Full Dimming Range [PDF]

, 2016
This paper presents a single-inductor multipleoutputs (SIMO) LED driver with precise dimming and full dimming range. Based on the coordination of a string-level and a system-level dimming schemes, the proposed SIMO LED driver can overcome practical ...
Tan, SC, Tan, S-C, Hui, SYR, Li, S, GUO, Y   +4 more
core   +1 more source

A resonant multi-channel sharing current LED driver based on variable inductor

Journal of Hebei University of Science and Technology, 2017
In order to solve the problems of the traditional LED driver adopting the frequency control with high EMI, pulse width modulation (PWM) with the complex control circuit,and the LLCC, LCLC resonant topology realizing constant current output system with ...
Guozhuang LIANG, Hanlei TIAN, Xiaoyu XU
doaj   +1 more source

Remote Magnetomechanical Neuromodulation Uncovers Therapeutic Mechanisms for Alleviating Parkinsonian Symptoms in Freely Moving Mice

Advanced Science, EarlyView.
Magnetomechanical neuromodulation using magnetic nanodiscs enables remote activation of neurons. In a hemiparkinsonian mouse model, alternating magnetic fields actuate the nanodiscs to generate torque that opens mechanosensitive ion channels within the subthalamic nucleus, thereby modulating basal ganglia motor circuitry.
Anouk Wolters, Lorenzo Signorelli, Christian Herff, Sophia Gimple, Renzo Riemens, Gunter Kenis, Kim Rijkers, Hamed Shabani, Jyh‐Jang Sun, Yasin Temel, Hans Clusmann, Danijela Gregurec, Sarah‐Anna Hescham   +12 more
wiley   +1 more source

A Novel Single-switch High Power Factor Led Driver Topology With High-frequency Pwm Dimming Capability

Eletrônica de Potência, 2013
In this work, a novel off-line converter with power factor correction (PFC) and pulse-width modulated (PWM) dimming function employing a single active power switch is proposed for LED lighting.
Pedro S. Almeida, Guilherme M. Soares, Henrique A. C. Braga   +2 more
doaj   +1 more source

Retina‐Inspired Bi‐Based Terahertz Photonic Neuromorphic Devices

Advanced Science, EarlyView.
Combined with effective band alignment and substrate engineering, bismuth materials are introduced to form terahertz photonic bio‐inspired devices with picosecond short‐term plasticity to enable multi‐scene visual perception. Thus obtained hardware through the terahertz optical neural network (THz‐ONN) demonstrates high recognition accuracy, providing ...
Pujing Zhang, Donggang Xie, Longyu Shi, Mengyuan Wang, Huiwen Shi, Yu Wu, Menglei Li, Guangwei She, Peijie Wang, Wensheng Shi, Cunlin Zhang, Kuijuan Jin, Guozhen Yang, Qingli Zhou, Chen Ge   +14 more
wiley   +1 more source

Dimming control and characteristics of high-frequency operated metal halide lamps

, 2002
Dimming control and characteristics of high-frequency operated metal-halide (MH) lamps are described. Lamp performance based on two ballast topologies is compared. The dimming range and stability control of the MH lamps are addressed.
Chung, H, Yan, W, Hui, SYR, Cao, X
core  

Sliding Ferroelectricity Driven Spin‐Layertronics in Altermagnetic Multilayers

Advanced Science, EarlyView.
Integrating sliding ferroelectricity with altermagnetism enables nonvolatile electrical control of spin and layer degrees of freedom. In bilayer CuF2, interlayer translation reverses layer‐locked spin‐split bands, establishing a multifunctional “spin‐layertronic” platform.
Rui Peng, Guangxu Su, Yangyang Fan, Jiaan Li, Fanxin Liu, Yee Sin Ang   +5 more
wiley   +1 more source

Single‐Step Electrochemical Aptasensor for Melatonin Detection in Unprocessed Plasma

Advanced Science, EarlyView.
Melatonin is a well‐known biomarker with significant potential for clinical use in diagnosing circadian rhythm sleep disorders (CRSDs) and monitoring patients with documented circadian clock disruption. An electrochemical aptamer‐based biosensor (E‐aptasensor), employing an optimized population of melatonin aptamers, has been proposed as a solution for
Hamed Shieh, Arash Khorrami Jahromi, Fernando Gonzales‐Aste, Sajad Shiekh, Roozbeh Siavash Moakhar, Sahar Sadat Mahshid, Sara Mahshid   +6 more
wiley   +1 more source

Practical Evaluation of Dimming Control Methods for Electronic Ballasts

, 2003
The authors compare and evaluate (i) the traditional frequency-control dimming method and (ii) a recently-patented voltage-control dimming method in electronic ballasts for fluorescent lamps. The power factor, energy efficiency, electronic loss, lux/Watt
Lee, TS, Hui, SYR, Chung, HSH, Tam, PW, Liu, YS   +4 more
core  

Design of High Efficiency Illumination for LED Lighting

International Journal of Photoenergy, 2013
A high efficiency illumination for LED street lighting is proposed. For energy saving, this paper uses Class-E resonant inverter as main electric circuit to improve efficiency. In addition, single dimming control has the best efficiency, simplest control
Yong-Nong Chang, Hung-Liang Cheng, Chih-Ming Kuo   +2 more
doaj   +1 more source