Plasma Display Panel Principle

1
Plasma Display PanelPrinciple

• What is Plasma
• Basic Pixel Drive
• Picture Reproduction
• Panel Structure
• Weakness of PDP

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What is Plasma
1. What is Plasma 2. How to use Plasma
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3
What is Plasma
Temperature
High
Low
Solid
Liquid
Gas
Plasma

-
-

-

-

-
-
Ion - Electron
Atom
Atom
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4
Plasma
-
UV
-
-

Temperature or Voltage potential
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5
Fluorescence lamp
Discharge
Low Pressure Gas
.
UV

Visible Light
Start Discharge
Discharge Start Voltage
Voltage
Normal Glow
Current
CLICK
CLICK
6
Basic Pixel Drive
1. Pixel Structure 2. Drive Process
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7
Pixel Structure
Rib
Colour Phosphor
Scan Electrode
Data Electrode
Xenon Neon
Sustain Electrode
Dielectrics
Aluminum Base
Rib
Rear Glass
Front Glass
CLICK
CLICK
CLICK
CLICK
CLICK
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8
Initialization Clear the Electric charge

CLICK
9
Initialization


Vs


CLICK
CLICK
10
Write (Address) Select the emission required
Pixel

CLICK
11
Drive
Write
Discharge
Ionization




Data Pulse
Scan Pulse
Ions - Electrons
CLICK
CLICK
12
Wall Voltage




Vw
CLICK
CLICK
13
Sustain Emit the visible light

CLICK
14
Sustain Step 1


Vs
Vs Vw


CLICK
CLICK
15
Sustain Step 2


Vs


CLICK
16
Sustain Step 3

Vw

CLICK
17
Sustain Step 4


Vs
Vs Vw


CLICK
18
Sustain Step 5


Vs


CLICK
19
Sustain Cycle

• Repeat Step 1 to Step 5

Sustain Pulse
AC Drive Type Plasma Display
CLICK
20
Light Emission
UV
UV
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21
Sub Field
Initialize
Write
Sustain
Address Period
Sustain Period
Sub Field
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Picture Reproduction
1. Comparison 2. Scan 3. Emission 4.
Brightness control (Sub-Field Drive)
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PDP vs CRT
CRT PDP Scan Dot Sequence Line
Sequence Interlace Progressive Emission Dot
Sequence Simultaneous Phosphor Electron Ultra
Violet Lay Excitation Brightness Beam
Current Discharge Time Control (Sub-Filed
Drive)
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24
Line Sequence Scan
Y1 Y2 Y3 Y4 Y5 Y6
Y1 Y2 Y3 Y4 Y5 Y6
Line Sequence (PDP/LCD)
Dot Sequence (CRT)
CLICK
25
Progressive Scan
Interlace (CRT)
Progressive (PDP)
CLICK
CLICK
26
Emission
Dot Sequence Emission (CRT)
Simultaneous Emission (PDP)
CLICK
CLICK
27
Sub Field Drive System
1 TV Field

8 Sub Fields
1st 2nd 3rd 4th 5th
6th 7th 8th
1 2 4 8 16
32 64
128
CLICK
Address Period
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Sub Field Drive
8 Sub Fields
Time
7th Sub-field
8th Sub-field
Initialize
Vertical Scan
Vertical Scan Write
Sustain
CLICK
CLICK
CLICK
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Vertical Scan
//
R Data
//
G Data
//
B Data
//
Y1
//
Y2
//
Y3
Vertical Scan
Initialization
//
Y480
1 Sub Field
CLICK 3 times
CLICK
CLICK
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Brightness Control
8 Bit Digital Video Signal
Analogue Video Signal
1 1 1 1 1 1 1 1
1st Line

0 1 1 1 1 1 1 0
120th Line

1 1 1 0 0 0 0 0
240th Line
7th S.F.
1st Sub Field
4th S.F.
2nd S.F.
5th S.F.
8th S.F.
Sampling point
3rd S.F.
6th S.F.
Sub Field Drive System
CLICK
CLICK
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Brightness Control
8 Sub Fields
1 2 4 8 16
32 64
128
Very Bright
111 1 1 1 1 1
Bright
100 1 0 0 0 1
Dark
111 0 1 0 0 0
Very Dark
010 0 0 0 0 0
t
Pixels
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Brightness Control
Pixel
8 Sub Fields
Data
001 0 1 1 1 0
Data
111 1 1 1 1 1
CLICK
CLICK
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Panel Structure
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CLICK
CLICK
CLICK
CLICK
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Weakness of PDP
1. Black Reproduction 2. Motion Picture
Disturbance 3. After Image (Burning) 4. High
Panel Current 5. Transportation damage 6.
Barometric Pressure
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35
1. Black Reproduction
CRTs Black
PDPs Black
0 Beam
0 Sustain
Reason
Side effect of Sub-Field Drive
Initialization Discharge
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2. Motion Picture Disturbance
Reason 1. Pixels Emission Timing Difference
due to Sub-Field Drive System 2. Human Eyes
Visual Sense Speed
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37
1) Object move to right
False Noise Colour
CLICK 4 times
CLICK
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2) Object move to Left
False Noise Colour
CLICK 4 times
CLICK
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Pixels
1 2 4 8 16
32 64
128 127
1 2 4 8 16
32 64
128 127


Discharge time
Discharge off
CLICK
CLICK
40
Dynamic False Noise (Contour)
127
128
127
127
127
128
128
128
128
Pixels
127
127
127
127
127
1st Field
128
128
128
128
128
127
127
127
127
127
2nd Field
128
128
128
128
128
127
127
127
127
127
3rd Field
128
128
128
128
128
127
127
127
127
127
4th Field
Time
128
128
128
128
128
127
127
127
127
127
5th Field
128
128
128
128
128
CLICK
CLICK
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False Colour
Magenta Picture



lt Still Picture gt
lt Moving Picture gt
CLICK
CLICK
42
3. After Image (Burning)
Panasonic PDP
PDP
Welcome to Japan
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43
After Image (Burning)
Reason Gas is activated (Easy to discharge)
Temporary burn
Permanent burn
CLICK
CLICK
44
4. High Power Consumption
Reason Plasma Display is Large Capacitor


Matsushita
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45
Stray Capacitor
Scan Electrode
CS (Stray Capacitor)
Sustain Electrode
CLICK
46
Stray Capacitor
852
Cs x 852 x 480 x 3 Cs x 1.23 million (F)
480
Sustain Voltage
Sustain Current
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47
5. Transportation Damage
Transportation and Handling Condition
Plasma Display
Plasma Display
N.G.
UPRIGHT only
No Lie Down
CLICK
CLICK
CLICK
48
Upright Transportation
Vibration / Shock
Enough Strengthen
CLICK
CLICK
49
Transportation Damage
Rib Crack by Transportation vibration

Defect pixel
CLICK
CLICK
50
Barometric Pressure
Gas pressure
Barometric Pressure
CLICK
CLICK
CLICK
CLICK
51
Sea level area
Barometric pressure / 1 Torr
Gas pressure / 0.6 Torr
CLICK
CLICK
CLICK
52
Over 3000 meters above sea level
Pressure / below 0.6 Torr
pressure / 1 Torr
Gas Pressure / 0.6 Torr
CLICK
CLICK
CLICK
53
END of PDP Principle presentation