Nanosecond Pulse Drive Plasma Display Tablet Is Helpful To Study

Nowadays the main disadvantages of plasma display panel (PDP) are the low luminous efficacy in sustain period and excessively high power consumption, which not only is a waste of energy, but affects the life time as well. Based on the significant improvement of the luminous efficacy of dielectric barrier discharge due to fast pulse drivers, a novel theory is proposed to increase the luminous efficacy and energy efficiency, which improves the dielectric barrier discharge luminous intensity in PDPsustain period using fast pulse drivers, to enhance the photoelectric transformation efficiency.In this paper, a nanosecond pulsed power driving source with300V bipolar pulses is designed to drive PDP working in sustain period. The driver source consists of uni-directional signals in three levels. First level is to use FPGA to generate original control signals. Secondly, multimode fiber-optics is used to isolate electrical connection and transmit the signals, while current amplifier and grid electrode auxiliary drivers are assembled to generate the advanced control signals. At the third level, fast full-bridged MOSFETs are triggered by the former signals to output bipolar nanosecond pulses with the amplitude of300V. Considering the pulses with or without dead bands as a factor, the source is defined in two out-put working modes, both of which are ADS drive model and belong to the uni-particle field driving mode in sustain period. The source has a frame field frequency of50Hz and a subfield frequency varying with the width of output pulse, and the pulse quantity is200. In a uni-particle field, the peak output current is40A with a minimum impulse width of350ns, and the minimum rising time of PDP with loads is120ns.In this paper, PDP module is set to stable discharge mode in different schemes, and several evaluation parameters of luminous efficiency are measured such as discharge power, white light luminous flux, nocturnal radiation intensity of certain wavelength, and luminous intensity. The curves of different characteristic parameters due to different rising time, impulse width and dead time of bipolar pulses are evaluated and analyzed using the theory that fast pulse driven dielectric barrier discharge could increase the luminous efficiency.Several final conclusions are listed through the analysis of PDP discharge and experimental results. First, fast pulse driver is capable to improve the luminous efficiency of PDP, and to mainly increase the radiant intensity of172nm ultraviolet radiation. In the range of500ns, the luminous efficiency can be increased by13%within100ns. The luminous intensity is increased by2.9%-5.0%when the rising time varies from800ns to200ns. Second, the impulse width of PDP should be set to800ns or longer, so as to avoid the area of short pulse and low luminous efficiency. Long impulse width is good for enhancing the white light luminous efficiency, the increasing rate of which is34.41x/μs (2%/μs) in the range of4-12μs. Third, the luminous efficiency can also be increased by32%if we appropriately increase the dead time betweenbipolar pulses and select the optimum operating point of energy and luminous efficiency. This paper has practical values to the design of pulse drivers in sustain period.