plasma display principle
DESCRIPTION
Plasma Display PrincipleTRANSCRIPT
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PlasmaPlasma DisplayDisplay PanelPrinciple
What is Plasma What is Plasma Basic Pixel Drive Basic Pixel Drive Picture Reproduction Picture Reproduction Panel Structure Panel Structure Weakness of PDP Weakness of PDP
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What is PlasmaWhat is Plasma
1. What is PlasmaWhat is Plasma
2. How to use PlasmaHow to use Plasma
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What is Plasma
Solid Liquid Gas Gas PlasmaPlasma
+ -+ -
- +
+ -
- ++ -
+
+
+
+
Atom Atom+ Ion
- Electron
Temperature HighLow
CLICK
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Plasma
+
-
-
UV
-
Temperature
or
Voltage potentialCLICK
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Low Pressure Gas
Voltage
Discharge Discharge
Start VoltageStart Voltage
CurrentCurrent
Normal Glow
~. UV
Visible LightVisible Light
Fluorescence lamp
Start Discharge
Discharge
CLICKCLICK
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Basic Pixel DriveBasic Pixel Drive
1. Pixel StructurePixel Structure
2. Drive ProcessDrive Process
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Pixel Structure
Rib
Rib
Scan Electrode
Sustain Electrode
Xenon
+
Neon
Data Electrode
Colour Phosphor
Dielectrics
Rear Glass Front GlassAluminum
Base
CLICKCLICKCLICKCLICKCLICKCLICK
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InitializationInitialization
Clear the Electric chargeClear the Electric charge=
CLICK
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Initialization
+++| | |
Vs+++| | |
CLICKCLICK
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Write Write (Address)(Address)
Select the emission required PixelSelect the emission required Pixel
=
CLICK
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Write
+++++
| | | | |
| | | | |
+++++
+ Ions
- Electrons
Data Pulse Scan Pulse
DischargeDischarge
IonizationIonization
DriveDrive
CLICKCLICK
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Wall Voltage
++++| | | |
Vw
+++++
| | | | |
CLICKCLICK
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SustainSustain
Emit the visible lightEmit the visible light=
CLICK
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Sustain Step 1
++++| | | |
+++
Vs
| | |
Vs + Vw
CLICKCLICK
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Sustain Step 2
+++| | |
+++
Vs
| | |
CLICK
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Sustain Step 3
+++| | |
Vw
CLICK
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Sustain Step 4
+++| | |
VsVs + Vw +++| | |
CLICK
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Sustain Step 5
+++| | |
Vs+++| | |
CLICK
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Sustain Cycle
Repeat Step 1Step 1 to Step 5Step 5
Sustain Pulse
AC DriveAC Drive Type Plasma DisplayCLICK
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Light Emission
UV
UV
CLICK
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Sub Field
Initialize Write Sustain
AddressAddress
PeriodPeriodSustainSustain
PeriodPeriod
Sub FieldSub Field
CLICK
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Picture ReproductionPicture Reproduction
1. ComparisonComparison
2. ScanScan
3. EmissionEmission
4. Brightness controlBrightness control (Sub-Field Drive)(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 TimeControl (Sub-Filed Drive)
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Line Sequence Scan
Y1
Y2
Y3
Y4
Y5
Y6
Line Sequence(PDP/LCD)
Dot Sequence(CRT)
Y1
Y2
Y3
Y4
Y5
Y6
CLICK
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Progressive Scan
Progressive(PDP)
Interlace(CRT)
CLICKCLICK
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Emission
Simultaneous
Emission(PDP)
Dot Sequence
Emission (CRT)
CLICKCLICK
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Sub Field Drive System
Address Period
8 Sub Fields1 TV Field
1 2 4 8 16 32 64 128
=
1st 2nd 3rd 4th 5th 6th 7th 8th
CLICK
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Sub Field Drive8 Sub Fields
Vertical Scan
Initialize
Vertical Scan = Write
Sustain
Time7th Sub-field8th Sub-field
CLICKCLICKCLICK
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Vertical Scan
//
//
//
//
Y1
Y2
Y3
Y480
Initialization Vertical Scan
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1 Sub Field
R Data
G DataB Data
CLICK 3 timesCLICKCLICK
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Brightness Control
1 1 1 1 1 1 1 1
: : : : : : : :
1 1 1 0 0 0 0 0
Sampling point
0 1 1 1 1 1 1 0
: : : : : : : :
Analogue Video Signal 8 Bit Digital Video Signal
Sub Field Drive System
1st Sub Field2nd S.F.
3rd S.F.
4th S.F.5th S.F.
6th S.F.
7th S.F.8th S.F.
1st Line
120th Line
240th Line
CLICKCLICK
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Brightness Control8 Sub Fields
Pixels
Very Bright
Bright
Dark
Very Dark
t
1 2 4 8 16 32 64 128
111 1 1 1 1 1
100 1 0 0 0 1
111 0 1 0 0 0
010 0 0 0 0 0
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Brightness Control8 Sub Fields
Pixel
001 0 1 1 1 0Data
111 1 1 1 1 1Data
CLICKCLICK
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Panel Structure
CLICKCLICKCLICKCLICKCLICKCLICK
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1. Black ReproductionBlack Reproduction
2. Motion Picture DisturbanceMotion Picture Disturbance
3. After Image (Burning)After Image (Burning)
4. High Panel CurrentHigh Panel Current
5. Transportation damage Transportation damage
6. Barometric PressureBarometric Pressure
Weakness of PDP
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1. Black ReproductionBlack Reproduction
Initialization Discharge
0 Beam 0 Sustain
CRT`s Black PDP`s Black
Reason Side effect of Sub-Field Drive
CLICKCLICK
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2. Motion Picture DisturbanceMotion Picture Disturbance
Reason
1. Pixels Emission Timing Difference
due to Sub-Field Drive System
2. Human Eyes Visual Sense Speed
CLICK
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1) Object move to rightObject move to right
False Noise & Colour False Noise & Colour CLICK 4 timesCLICK
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False Noise & Colour False Noise & Colour
2) Object move to LeftObject move to Left
CLICK 4 timesCLICK
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1 2 4 8 16 32 64 128
127
Pixels
Discharge time
1 2 4 8 16 32 64 128
127
Discharge offCLICKCLICK
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Dynamic False Noise (Contour) 128 127
127
1281st Field 127
128127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
127
128
2nd Field
3rd Field
4th Field
5th Field
127 127 127128 128 128 128
Time
Pixels
CLICKCLICK
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False Colour
Magenta
Picture
+ + +
< Still Picture > < Moving Picture >CLICKCLICK
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3. After ImageAfter Image (Burning)
Panasonic
PDP
Welcome
to
Japan
PDP
CLICK
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After ImageAfter Image (Burning)
Reason
Gas is activated (Easy to discharge)
CLICKCLICK
Temporary burn
Permanent burn
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4. High Power ConsumptionHigh Power Consumption
Reason
Plasma Display is Large Capacitor
=
CLICK
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Stray Capacitor
CS
(Stray Capacitor)
Scan Electrode
Sustain Electrode
CLICK
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Stray Capacitor
Cs x 852 x 480 x 3
= Cs x 1.23 million (F)
480
852
Sustain Voltage
Sustain Current
CLICK
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5. Transportation Damage
CLICK
UPRIGHT only
CLICKCLICK
Plasma Display
Plasma Display
N.G.
Transportation and Handling Condition
No Lie Down
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Upright Transportation
CLICKCLICK
Enough StrengthenVibration / Shock
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Transportation Damage
CLICK
Rib Crack by Transportation vibration
CLICK
Defect pixel
=
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Barometric Pressure
CLICK
Gas pressure
Barometric Pressu
re
CLICKCLICKCLICK
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Sea level area
CLICK
Barometric pressure / 1 Torr
Gas pressure / 0.6 Torr
CLICKCLICK
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Over 3000 meters above sea level
CLICK
Pressure / below 0.6 Torr
Gas Pressure / 0.6 Torr
CLICK
pressure / 1 Torr
CLICK
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END
of
PDP Principle
presentation
Plasma Display Panel Principle What is Plasma Sustain Cycle