Results 21 to 30 of about 6,294 (295)
Effect of Different Welding Methods on Flip-Chip LED (FC-LED) Filament Properties
Applied Sciences, 2018 This paper investigates the effect of two different welding methods, direct welding (DW) and vacuum furnace welding (VFW), on flip-chip light-emitting diode (FC-LED) filament properties.
Mengtian Li +6 more
doaj +1 more source
Bilateral comparison of luminous flux (EURAMET.PR-K4.3)
Metrologia, 2019 This report gives the result of a bilateral comparison of luminous flux between the Instituto de Óptica, IO-CSIC (Spain) and the Ulusal Metroloji Enstitüsü, TUBITAK UME (Turkey). This bilateral comparison is intended to link the TUBITAK UME realized lumen to the CCPR K4 reference value.
Pons, Alicia +2 more
openaire +2 more sources
Luminous flux (radiant power,radiant flux) and solid angle through the inclined ellipse
, 2015 Calculation of the luminous flux (radiant flux,radiant power) and the solid angle through the inclined ellipse with numerical ...
Schröer, Harald
core +1 more source
Design Methodology for LED Lighting Systems Based on Photo-Electro-Thermal Interrelationships
Eletrônica de Potência, 2018 This paper presents a design methodology for LED (Light-Emitting Diode) lighting systems based on photo-electro-thermal (PET) interrelationships. The proposed methodology uses only LED datasheet information, which makes experimental tests unnecessary to
Leandro Chies +5 more
doaj +1 more source
Increasing luminous efficiency of led by joint dimming mode with adjustable peak current
MATEC Web of Conferences, 2016 Luminous efficiency and color temperature of LED chip are affected by current and temperature. PWM dimming mode only works at two kinds of current levels-rated current and zero current.
Li Yongtao +5 more
doaj +1 more source
Proceedings of the International Conference on Applied Innovations in IT, 2017 This article describes various automatic light control systems. The aim is to analyze existing luminous flux lighting installations with automatic control systems and propose some invention, which is able to eliminate some of their shortcomings ...
Nikolai Pavlov +2 more
doaj +1 more source
The luminous flux through a ball with absorption
, 2015 The luminous flux and the illumination through a ball in a medium are ...
Schröer, Harald
core +1 more source
Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes
Advanced Functional Materials, EarlyView.Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita +6 more
wiley +1 more source
Luminous flux and illumination through the vertical regular n-gon
, 2015 The luminous flux and the illumination through the vertical regular n-gon are ...
Schröer, Harald
core +1 more source
IEEE Photonics Journal, 2022 YAG: Ce3+ phosphor/silicone composites are widely used in solid-state lighting as a light converter to achieve white lighting. However, because of high thermal resistance and low thermal stability, the luminous performance of YAG: Ce3 ...
Yixing Cao +6 more
doaj +1 more source