Design Methodology For Led Lighting Systems Based On Photo-electro-thermal Interrelationships

Design for Low Power HB-LED Lighting

This paper presents an improved power quality converter (IPQC) based power supply design for high brightness Light Emitting Diode (HB-LED) low power lighting. The IPQC circuit uses a Cuk buck-boost converter to operate it in discontinuous conduction mode (DCM) using voltage follower technique for the mitigation of harmonic contents present in the AC mains current. Subsequently reduction in harm...

designing unmanned aerial vehicle based on neuro-fuzzy systems

در این پایان نامه، کنترل نرو-فازی در پرنده هدایت پذیر از دور (پهپاد) استفاده شده است ابتدا در روش پیشنهادی اول، کنترل کننده نرو-فازی توسط مجموعه اطلاعات یک کنترل کننده pid به صورت off-line آموزش دیده است و در روش دوم یک کنترل کننده نرو-فازی on-line مبتنی بر شناسایی سیستم توسط شبکه عصبی rbf پیشنهاد شده است. سپس کاربرد این کنترل کننده در پهپاد بررسی شده است و مقایسه ای ما بین کنترل کننده های معمو...

Design Guideline on 150W Power Supply for LED Street Lighting Design Using FL7930B and FAN7621S

A method for projecting useful life of LED lighting systems

This study investigated a non-invasive method to determine the junction temperature of AlGaInP light-emitting diodes (LEDs) in a system. Because the primary cause for the AlGaInP LED degradation is junction temperature, this method can be used to predict LED life. Currently, life estimates of LED lighting systems quoted by manufacturers (commonly 100,000 hours) are based on the average life of ...

Signal Processing for LED Lighting Systems : Illumination Rendering and Sensing

geboren te Puyang, China. Subject headings: light emitting diode / illumination pattern / illumination sensing / frequency division multiplexing / lighting control / signal processing Cover design by Jieyin Cheng c 2010 by Hongming Yang, Eindhoven v vi Samenstelling van de promotiecommissie: Solid state lighting, employing high brightness light emitting diodes (LEDs), is becoming increasingly w...