نتایج جستجو برای: luminous efficiency
تعداد نتایج: 396151 فیلتر نتایج به سال:
Lighting calculations are commonly done to evaluate the efficiency of a lighting system. One of the important parameters in establishing a luminaire’s efficiency is the total flux emitted from a luminaire or light source. The luminous flux of a light source can be calculated from readily available data of the measurements of its Luminous Intensity Distribution Function, in the form of table of ...
Microfabricated field emission arrays (FEA) can be used to make flat panel displays (FPD) with high brightness, large viewing angle and high luminous efficiency. However, the current implementations of field emission displays (FED) require a trade-off between luminous efficiency and display resolution, which arises because of the structural / materials limitations and the consequent danger of d...
Polarizer-free high contrast-ratio organic light-emitting diodes (OLEDs) are explored with a structure involving a semi-reflective Cr-based bottom electrode and a dielectric-capped thin Ag top electrode. Their efficiency is shown to be improved significantly with little sacrifice in luminous reflectance by adopting low-refractive-index injection layers that can increase the effective reflectanc...
Here we explored the possibility of using CuInS2-based nanocrystals as colour converting materials for light-emitting applications. Using a mixture of red and green emissive CuInS2-based nanocrystals, we successfully fabricated high colour rendering white light-emitting diodes with surface mounted devices and high-power types. The devices exhibit improved luminous efficiency, high colour render...
Perceived brightness is considered to be a combined consequence of outputs of the luminance channel and the chromatic channels in the visual system. The differences of logarithmic spectral luminous efficiencies between heterochromatic brightness matching and flicker photometry that were obtained from 16 subjects were examined by using principal component analysis. The luminous-efficiency differ...
The image in a plasma display panel is formed when a mixture of several rare gases are activated and discharged .and Xe is excited. Because of limitation as to the increase Xe gas, the luminous efficiency of PDP is lower than that of cathode ray tube (CRT). In this paper we show by numerical simulation that the excitation efficiency in He-Xe mixture is lower than that in a Ne-Xe ...
OLEDs employing CMB1, a novel binaphthyl-containing bi-nuclear boron complex, as the emitter exhibited bright yellow emission with a luminous efficiency of 2.1 cd A(-1).
We report a new hole-injection material, copper hexadecafluorophthalocyanine (F16CuPC) for organic light-emitting diodes (OLEDs) consisting of N,N’-di(1-naphthyl)-N,N’-diphenylbenzidine (α-NPD) as a hole-transport layer and 8-tris-hydroxyquinoline aluminum (Alq3) as a light-emitting and electron-transport layer. The insertion of the F16CuPC between indium-tin oxide (ITO) and α-NPD reduces the o...
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