PDP basic

AN2503

6/30

2.2

Panel memory characteristic

The AC PDPs provide inherent memory characteristics [3.], [4.], as explained in the

following figures.

gas breakdown voltage Vbd, cannot initiate a discharge, as shown in Figure 3.

Figure 3.

Memory effect - no charges

If data pulses Vd are applied to the address electrodes, while scan pulses -Vy are

sequentially applied to each Y electrode, the voltage (Vd + Vy) is higher than Vbd and a

weak discharge ignites, as shown in Figure 4.

Figure 4.

Memory effect - address phase

Charges, called wall charges (or wall voltage Vw), deposit on the dielectric layer and reduce

the effective voltage across the gap. Then, the discharge ceases after a short time, as

shown in Figure 5.

Figure 5.

Memory effect - Wall charges deposit

3

Address = Vs/2

X = Vs

Y = GND

3

Address = Vd

X = Vk

Y = -Vy

Address = Vd

X = Vk

Y = -Vy