Wall Voltage; Sustain Step - Panasonic TH-50PHD3 Service Manual

TH-50PHD3 / TH-50PHW3
1.9.

Wall Voltage

When input pulses are stopped, Ions and Electrons which are
charged on the dielectric around the electrodes are remained.
This charge is called Wall Voltage (Pilot voltage).
This operation is called Write .

1.10. Sustain Step 1

Negative polarityís Sustain pulse is input between sustain and
scan electrodes and voltage potential between two electrodes
becomes sum of Sustain pulse and wall voltage.
Then discharge start.
Fig. I
Fig. J
1.11. Sustain Step 2
When sustain pulse is stopped, Ions and Electrons are
remained again as Wall voltage. However polarity of wall
voltage is reversed.
1.12. Sustain Step 3
Positive polarity´s Sustain pulse is input between sustain and
scan electrodes and discharge start again.
6
Fig. K
Fig. L