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In the last decades, the high pressure sodium (HPS) lamp has been developed to be supplied in high frequency in order to increase the lighting efficiency of the system lamp/ballast. However, at some given frequencies, standing acoustic waves, namely acoustic resonance (AR), might develop in the burner and cause lamp luminous fluctuation, extinction and(More)
In this paper, a hardware equivalent of an organic light-emitting diode (OLED) was designed and investigated. This substitution OLED device is based on a circuit-equivalent OLED model and can be used to design and test OLED dedicated drivers. Indeed, OLEDs are available on the market, but they are still very expensive and hard to obtain. Compared to a real(More)
In the last decades, the high-pressure sodium (HPS) lamp has been supplied in high frequency in order to increase the efficacy of the lamp/ballast system. However, at some given frequencies, standing acoustic waves, namely, acoustic resonance (AR), might develop in the burner and might cause lamp luminous fluctuation, extinction, and destruction in the most(More)
This paper presents a numerical model of high-pressure sodium (HPS) lamps, including acoustic streaming. The model is implemented in COMSOL and is based on the finite-element method using a 2-D axisymmetric geometry. Moreover, a revision concerning experimental acoustic resonance (AR) characterizations of HPS lamps will be also provided. The results(More)
A current-controlled driver for a dielectric barrier discharge (DBD) lamp is proposed in this paper as opposed to most of the published drivers which are voltage-controlled drivers. The design of this driver is intended to enhance the electrical-to-optical efficiency of the lamp and therefore enhance the overall efficiency of the system. The driver topology(More)
A XeCl dielectric barrier discharge (DBD) excilamp applied by pulsed and sinusoidal voltage waveforms is simulated using a 1-D drift-diffusion model. In both waveforms, the light output power depends not only on the gas mixture composition but also on the electrical parameters of each voltage waveform such as the frequency, the duty cycle, etc. At the same(More)
A XeCl dielectric barrier discharge under applied pulsed and sinusoidal voltage waveforms is simulated using a one dimensional drift diffusion model. In both waveforms, the light output depends not only on the gas mixture composition but also on the electrical parameters of the voltage waveform such as the frequency, the duty ratio…ctc. At the same(More)
We have implemented a predictive experimental tool to determine fluorescent lamp lifetime according to its operating conditions. This tool, based on an electrical measurement, provides an indication of the physical state of fluorescent lamps electrodes (hot cathodes). It may be used to shorten lifetime test and therefore to get a faster evaluation of the(More)