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Two-dimensional simulations of plasma flow and charge spreading across barrier pixels in AC plasma displays

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3 Author(s)
Veerasingam, R. ; Sandia Nat. Labs., Albuquerque, NM, USA ; Campbell, R.B. ; McGrath, R.T.

Two-dimensional multispecies simulations of adjacent pixels separated by a barrier height 80% the gap height in a plasma display pixel cell are performed. The fill gas pressure is 400 torr with 2% xenon in helium. The simulations using a minimum number of excited states of helium and xenon are performed for different cell widths representing different display resolutions. The simulations show plasma transport through the gap to the adjacent pixel which is in the sustained off state. In a sustained off state, there is no discharge in the pixel at the sustained voltage. The simulations show that for low-resolution displays, the plasma overflow does not cause a discharge in the adjacent pixel that is in the sustained off mode, while for a high-resolution display a 20% gap in the barrier height could result in a breakdown in the adjacent off pixel. A higher pixel resolution, or equivalently smaller pixel pitch. requires higher firing and sustained voltages due primarily to increased particle losses as a result of the reduced particle transit times. Finally, using a larger number of excited xenon atomic states including the xenon [6s, j=1] and [6s', j=1] radiative states and the molecular xenon dimer, an isolated single pixel is simulated to model the transport of excited states including the radiative states. The model shows that the density profiles peak in the cathode fall region spreading out to the side walls with decreasing intensity

Published in:

Plasma Science, IEEE Transactions on  (Volume:24 ,  Issue: 6 )