Daewoo Plasma Training Schematic
PLASMA DISPLAY PANEL
(PDP)
DAEWOO
DAEWOO ELECTRONICS CO., LTD
DAEWOO ELECTRONICS CO., LTD
D I G I T A L
2002. 5
DIGITAL TV DEVISION
DIGITAL TV DEVISION
WHAT IS PLASMA DISPLAY PANEL?
1. PDP refers to plasma display panel. It was named as PDP by the faculty of University of
Illinois(UIUC) as they first made it. It was made by combining physical phenomenon
called 'plasma' and electric device into a form of panel.Generally speaking, plasma refers
to ionized gas. However, it means 'glow discharge' in PDP business.
2. In the past, PDP was monochromatic(orange), nowadays it can generate full color by glow
discharge in the 'excited spaces'.(UV from excited spaces react with fluorescent materials
which then emit visible rays)
3. PDP let us watch figures or letters through image process and digital&analogue driving
circuits. In PDP, material science and high technique are combined together.
4. In 1927, a plasma display panel was applied to TV rather than CRT. and its concept was
established. In 1964, AC PDP was made by University of Illinois for the first time.
In early1970's, George Dick invented 'surface type discharge' which is mainly used
for current AC PDP.
From early 1990’ s, many companies have developed the AC PDP that can be selled in
consumer market.
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< The Principle of PDP>
1. The plasma display panel(PDP) can be thought of as a descendant of the neon lamp.
2. The term plasma refers to a gas that consists of electrons, positively charged
particles known as ions, and neutral particles.
3. The PDP has sometimes been referred to as a gas-discharged display because it
operates by passing electricity through neon gas, causing it tobecome 'charged'
temporarily : light is produced when the gas spontaneously discharges.
4. Plasma display panels can also be viewed as a series of fluorescent lamps. The
displays operate at high voltages, low currents, and low temperatures, resulting in
long operating lifetimes (typical 15000 hours, max 30000 hours).
5.Inside the plasma panel, as series of red, green, and blue cells are grouped in a
precise matrix.These cells are activated individually, unlikestandard CRTs or LCDs,
this means that they emit light individually creating a precisepixel on the viewing area.
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Bus
Electrode
Protection
Layer(MgO)
< The Structure and Principle of AC-PDP >
(Front Glass Substrate)
Sustain
Electrode
Dielectric Layer
(Back Glass Substrate)
Barrier Rib
Dielectric
Layer
Phosphor(R,G,B)
Under Layer
Address Electrode
Protection
Layer(MgO)
Barrier rib
Phosphor
(R,G,B)
Dielectric Layer
3
Visible Light
Front Glass Substrate[*]
Plasma
UV
Visible Light
Back Glass Substrate
Dielectric Layer
Bus
Electrode
Sustain
Electrode
Address
Electrode
Under Layer
< The Driving Method of AC-PDP >
1. As of early 1990, PDP was used as monochromatic monitors with simple X-Y matrix
driving system and 'Refresh'method.
2. Nowadays, PDP can display natural colors through sub-field driving method.
That is called “ ADS (Address Display Seperated) Method” .
3. 1 TV field consists of 8 sub-fields (SF1-SF8).
And each sub-field has different ratio of brightness( 1, 2 , 22 23, 24, 25, 26, 27 ).
4. While the brightness of CRT is determined by the intensity of electron beams,
the brightness of PDP is determined by controlling the frequency of glow discharge
during the time interval called "1 TV frame".
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[ Brightness display types of PDP and CRT ]
Simulation Movie
Display Device
PDP
CRT
[ Driving of sub-field ]
Address
1 SF 2 SF 3 SF 4 SF 5 SF 6 SF 7 SF 8 SF
Mechnism of brightness(gradation) display
Brightness
Time 1/60 sec
Brightness
Time 1/60 sec
1 TV Frame
Duration
1 2 4 8 16 32 64 128
1 TV Frame
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