ENGINEERING RESEARCH PAPERS

light emitting diode research papers 2015 IEEE PAPER




Utilization of light-emitting diode lamp on lift net fishery.
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Abstract. The research aimed to prove the LED (light emitting diode) lamp efficiency in lift net fishing and to find out the optimum time for lift net fishing operation. In this study, 2 lift net operated simultaneously for 15 nights. Each lift net has attached 4 LED lamps and 4

Transcranial Light Emitting Diode Therapy (TCLT) and its Effects on Neurological Disorders
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Abstract The Transcranial LED Therapy (TCLT) is a modality of low-level energy therapy based on the principle of photons delivered in a non-invasive manner for the rehabilitation of some neurological conditions such as psychological disorders, traumatic brain injuries,

A comparison of commercial light-emitting diode baited suction traps for surveillance of Culicoides in northern Europe
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Abstract Background: The response of Culicoides biting midges (Diptera: Ceratopogonidae) to artificial light sources has led to the use of light-suction traps in surveillance programmes. Recent integration of light emitting diodes (LED) in traps improves flexibility in trapping

Nature of Highly Efficient Thermally Activated Delayed Fluorescence in Organic Light-Emitting Diode Emitters: Nonadiabatic Effect between Excited States
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ABSTRACT: The discovery and utilization of metal-free organic emitters with thermally activated delayed fluorescence (TADF) is a huge breakthrough toward high-performance and low-cost organic light-emitting diodes. Time-dependent second-order perturbation

Wavelength tunable infrared light emitting diode based on ordered ZnO nanowire/Si1-xGex alloy heterojunction
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ABSTRACT We proposed and developed a novel infrared light emitting diode (LED) based on ordered pn heterojunction built of p-Si1-xGex alloy and n-ZnO nanowires. The Electroluminescence (EL) emission of this LED is in the infrared range, which is

Pulsed Light-Emitting Diode Photography for Coarse Water Characterization
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An optical photography probe employing pulsed light-emitting diode (LED) illumination has been developed for application to coarse water measurement in wet steam. High image resolution (1.38 lm/pixel) and low exposure time (100ns) photographs capture details of

Monitor Calibration Approach to Reducing High-Energy Visible Light from White Light-Emitting Diode
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Abstract. This research attempts to verify the efficacy of a monitor calibration approach to reducing or controlling high-energy visible light from a display backlit with white light- emitting diodes (LED). We propose an approach to reducing high-energy visible light

Curing depth of pit and fissure sealants with use of light emitting diode (LED) at different distances
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ABSTRACT In the process of caries prevention, placement of pit and fissure sealants is a low-priced, effective and safe procedure. Presently, clinical operators prefer LED lamps. In pediatric dentistry, certain complications might arise such as lack of patient cooperation

Improving the performance of MEH-PPV based light emitting diode by incorporation of graphene nanosheets
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The effect of incorporation of graphene nanosheets on the efficiency of poly [2-methoxy-5-(20 -ethyl- hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) based light emitting diodes (LED) has been examined by varying the graphene concentration from 0 to 0.1 wt%. It was observed

A 3 W High-Voltage Single-Chip Green Light-Emitting Diode with Multiple-Cells Network
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A parallel and series network structure was introduced into the design of the high-voltage single-chip (HV-SC) light-emitting diode to inhibit the effect of current crowding and to improve the yield. Using such a design, a 6.6× 5 mm 2 large area LED chip of 24 parallel

High colour rendering dichromatic monolithic light emitting diode with tuneable colour temperature.
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LEDs emitting white light either employ phosphor to down covert a high energy photon to low energy photon or use the colour mixing (ie RGB or RYGB) approach. A monolithic approach employs colour mixing by exciting photons of different energies (in the visible

Modeling for carrier transportation in organic light-emitting diode by considering effective tail states
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Abstract:We developed the 1D Poisson and drift-diffusion Solver by considering the effective tail states and field-dependent mobility to simulate the organic materials, such as NPB or TAZ. With the obtained tail state distribution and the field dependent mobility

Analysis of the experimental cooling performance of a high-power light-emitting diodepackage with a modified crevice-type vapor chamber heat pipe
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Abstract: The experimental analysis of a crevice-type vapor chamber heat pipe (CVCHP) is investigated. The heat source of the CVCHP is a high-power light-emitting diode (LED). The CVCHP, which exhibits a bubble pumping effect, is used for heat dissipation in a high-

Modelling of the Light Emitting Diode (LED) Heating/Cooling Process
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ABSTRACT This research paper illustrated how LED modeling done using FloTHERM software. Different materials of heat sink will be tested, compared and discussed in the research. Next, designed heat sink will be analyzed for its heat dissipation and heat

Light Emitting Diode in Comparison to Halogen Curing Technology: Microshear Bond Strength of Dental Composite Resin Restorative Material
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Abstract The aim of this study was to compare the micro-shear bond strength of composite resin cured with halogen visible light and blue light emitting diode curing units. Flat enamel surfaces of 50 segments of teeth were prepared. 50 cylindrical composite resin specimens

Influence of Light Emitting Diode on Bone Marrow and Healing of Dermatome Wounds
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Abstract The irradiation of large surfaces or whole body with light emitting diode LED -470 nm and -940 nm (LED shower) causes structural changes in bone marrow and stimulates healing of experimental dermatome wounds. The increase of migration of the bone

Recent Advances of Light Emitting Diode for Solid State Lighting
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Abstract A light-emitting diode (LED) is a two-lead semiconductor light source. It is a basic pn-junction diode, which emits light when activated. The present improvements in high power white light emitting diodes (LED) technology with 100+ thousand hour's life time per

Monte carlo analysis of multicolour LED light engine
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Abstract A new Monte Carlo simulation as a tool for analysing colour feedback systems is presented here to analyse the colour uncertainties and achievable stability in a multicolour dynamic LED system. The Monte Carlo analysis presented here is based on an

The Impact of the Conversion of Incandescent Bulbs to the LED Light Source in Traffic Signals in Houston: A Step toward Sustainable Control Devices
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16. Abstract With the slowing of the American economy since 2008, it has become imperative that municipalities identify areas in which costs can be reduced while still providing needed services to its constituents. The use of traffic signals equipped with light

LED light between Nobel Prize and cancer risk factor.
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Are light and illumination just a matter of energy efficiency Should we ignore the importance of light as an environmental signal to the physiological and immune systems in our body The answer is NO, as light is an important signal for entraining the biological

LED LIGHT: BENEFITS AND HAZARDS.
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Eco-friendly (lighting emitting diodes) LED have been touted as a super-efficient alternative to traditional bulbs because they use up to 85% less energy and each bulb can last up to 10 years. Philips, the world's biggest lighting maker, reported 58% jump in LED light sales

Visible light communication using Micro-LED
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Abstract:Light fidelity is a technology that recognized by its data transmission using light as medium. The inventors of this faster data transmission using light emitting diode (LED) are Prof. Harald Haas of university Edinburgh. As light is used as medium data can be transfer

Light Fades and Life Prediction of LED Light Source
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Abstract The life is the most representative parameter in the parameters of LED reliability. But the impact factor of the LED lifetime are numerous and complicated, each factor of the influence degree of each are not identical. If according to the traditional light source life

Effect of Different LED Light Colors on Development of the Reproductive System of Quails
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Abstract: Light duration, intensity and wavelength are critical environmental stimuli affecting physiology and growth rate of birds. The objective of this trial was to evaluate the effect of emitting diode lux color (LED) as a source of artificial lighting for quail. The study used 120

Development of Self-powered LED Street Light and Remote Controller Utilizing the ZigBee and Smart Devices
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Abstract. Notwithstanding street lights commonly supplied with power by connecting to power line and generally controlled by wired type, they need different type of system under the environment requiring self-charging and remote control. In this research, a system was

Photocatalytic Oxidation of N-Nitrosodimethylamine by UV-LED Light
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Abstract N-nitrosodimethylamine (NDMA), as a suspected human carcinogen, is detected in our drinking water. This project focused on photocatalytic oxidation using a UV-LED lamp. The goal of this project was to study the degradation and removal rate of NDMA from

LED BASED VISIBLE LIGHT COMMUNICATION: TECHNOLOGY, APPLICATIONS AND CHALLENGES–A SURVEY
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ABSTRACT Visible Light Communication (VLC) using light emitting diodes (LEDs) is a technology that provides an opportunity for high-speed low-cost wireless communication, being an alternative for effective and efficient communication that can cope with the actual

Curing depth of pit and fissure sealants with use of light emitting diode (LED) at different distances
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ABSTRACT In the process of caries prevention, placement of pit and fissure sealants is a low-priced, effective and safe procedure. Presently, clinical operators prefer LED lamps. In pediatric dentistry, certain complications might arise such as lack of patient cooperation

A Low-Cost Digital PWM-Controlled LED Driver with PFC and Low Light Flicker
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Abstract This paper proposes an LED driving circuit with a digital controller, power factor correct (PFC) function, and low light flicker. The key topology of the proposed circuit is a conventional Flyback combined with a pre-stage. As a result, there will be less light flicker

Modelling of the Light Emitting Diode (LED) Heating/Cooling Process
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ABSTRACT This research paper illustrated how LED modeling done using FloTHERM software. Different materials of heat sink will be tested, compared and discussed in the research. Next, designed heat sink will be analyzed for its heat dissipation and heat

Model of Band Diagram LED White Light in the System of GaN/InGaN
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The results of the research of semiconductor multilayer nanostructures suitable for making white light LEDs in the GaN/InGaN with red, green and blue emission spectra formed in a single chip. The methodology and the calculation of the energy levels, the wave functions

Review On Impact Of Ambient Light Noise Sources And Applications In Optical Wireless Communication Using LED
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Abstract There is a huge demand for Visible Light Communication, since it acts as an added supplement to RF signal transmission because of the advantages like license free, energy efficient, high security and it can be used even in the RF prohibited areas like hospitals



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