Abstract-Power consumption in liquid-crystal displays is analyzed by including frequent polarity reversals and duty-cycle control. A multistep voltage profile is proposed to reduce the power consumption of multiplexed and nonmultiplexed displays. The authors have also shown that the reduction in the power consumption can be achieved with a minimal increase in hardware complexity of the drive electronics.

In this study, both model analysis and electrical characterization of a dielectric barrier discharge based argon plasma jet have been carried at atmospheric pressure in a pin electrode configuration. The plasma and fluid dynamics modules of COMSOL multi-physics code have been used for the modeling of the plasma jet. The plasma parameters, such as, electron density, electron temperature and electrical potential have been analyzed with respect to the electrical parameters, i.e., supply voltage and supply frequency with and without the flow of gas. In all the experiments, gas flow rate has been kept constant at 1 liter per minute. This electrode configuration is subjected to a range of supply frequencies (10-25 kHz) and supply voltages (3.5-6.5 kV). The power consumed by the device has been estimated at different applied combinations (supply voltage & frequency) for optimum power consumption at maximum jet length. The maximum power consumed by the device in this configuration for maximum jet length of ∼26 mm is just ∼1 W.

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This paper reviews the technological advancements of cold atmospheric pressure plasma technology (CAPPT) in various fields that include-medicine, agriculture and industry. In the recent years, cold plasma technology has received considerable interest due to its inherent benefits that include- free radicals for inactivation of microbes, eco-friendliness, cheap operational cost, simplicity of operation and portability of devices. Various working gases (nitrogen, argon, and helium ) and various mechanisms (dielectric barrier discharge, corona discharge, floating electrodes) have been implemented for generating cold plasma at room temperature. Cold atmospheric pressure plasma technology (CAPPT) has been employed in material science for augmenting surface properties such as (adhesion,wettablility,chemical composition) of numerous materials that include-(metals,polymers,textiles). CAPPT technology is an established technology used to inactivate various microbes (viruses,bacteria,fungi) and further subsequently utilized in food preservation as well as shelf-life extension of fruits and vegetables. Cold plasma technology also has played a pivotal role in agricultural sector wherein it has shown great promise of enhancing agricultural produce through disinfection of seeds and food powders, germination of seeds etc. CAPPT technology has played a major role in plasma medicine, CAPPT treatment techniques have been employed in dentistry (tooth bleaching), dermatology (skin treatment) etc. Overall CAPPT technology is an efficient and potent tool offering both technological and biomedical applications.