TC-42PD1 - Panasonic TV Service Manual (repair manual). Page 9

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Fig. E

42 inch plasma display panel has 1,226,880 pixels. 
Each pixels structure is shown fig. E.

Fig. F

Brightness control of plasma display panel is carried out by
plasma discharge time change. To control each pixel’s
brightness  Sub-field drive system is used.
A sub-field is consist of Initialize,  Write and sustain opera-
tion.

Fig. G

To clear any remaining electric charge into the pixel, trape-
zoid voltage is applied between the scan and sustain elec-
trodes.
Plasma discharge is started but the discharge become small
gradually.
Then any electric charge  is cleared.

Fig. H

Data Pulse which is positive polarity is input to data electrode
and Scan pulse which is negative polarity is input to scan
electrode simultaneously.
That means sum of data and scan pulses voltage is applied
between two electrodes as discharge start voltage.
Discharge is started into the pixel and gas is ionized.
During discharging Ion is charged on the scan electrode side
and electron is charged on data electrode side.

Scan Electrode

Sustain Electrode

Xenon

+

Neon

Data Electrode

Colour Phosphor

Rib

Rib

Dielectrics

Rear Glass

Front Glass

Aluminum
Base

Address
Period

Sustain
Period

Sub Field

Initialize

Write

Sustain

VI

+++

l  l  l

+  

Ions

-

 

Electrons

Data Pulse

Scan Pulse

|   |   |   |   |

+++++

|   |   |   |   |

+++++

&