Abstract
We investigated the effects of changing the width of the
auxiliary electrode in an ac plasma display panel including centrally
located auxiliary electrodes between the sustain electrodes, based on
analyses of the discharge mode. A panel with auxiliary electrodes was driven
by pulse waveforms that included auxiliary pulses applied to the auxiliary
electrode immediately after every sustain pulse. The discharge modes are
changed consecutively from mode 1 to mode 3-2 when the sustain or auxiliary
pulse voltages are increased, which can be characterized as follows : 1) only the sustain pulse discharges are generated in mode 1;
2) one of a pair of the auxiliary pulse discharges is additionally generated
in mode 2; and 3) the other auxiliary pulse discharge is also generated in
mode 3-1 and mode 3-2. Distribution of the discharge mode changes in
accordance with the width of the auxiliary electrode (the focus is on modes
1 and 2 because these modes are effective modes); as the auxiliary electrode
is narrowed, the range of mode 1 becomes wide and the range of mode 2
becomes narrow. The wide range of mode 1 is attributed to the fact that the
discharge of the auxiliary pulse is suppressed due to a longer gap between
the sustain and auxiliary electrodes. The narrow range of mode 2 is caused
by the discharge of the auxiliary pulse less affecting the discharge of the
sustain pulse. Since the auxiliary electrode provides less of a decrease in
the number of wall charges on the sustain electrodes, the voltage margin is
improved for the case of the narrow auxiliary electrode. The luminous
efficacy is mostly improved in mode 1 for the case of the narrow auxiliary
electrode due to the auxiliary pulse with a higher voltage generating a
larger number of space charges, as well as in mode 2 for the case of the
wide auxiliary electrode due to a short electrode gap rendering a great
number of wall charges decreasing.
© 2010 IEEE
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