Plasma Display Panel

1
Plasma Display Panel

• David Phantana-angkool
• Chris Rodgers

http//www.unitedvisual.com/eos/Product.asp?dept_i
d7product_id5612
2
Questions

• For what size televisions, are plasma display
  panels generally regarded as superior?
• What is the efficiency of xenon excitation in RF
  PDP?

3
Definitions

• CNT-Carbon Nanotubes
• FPD - Flat Panel Display
• LCD - Liquid Crystal Display
• RF - Radio Frequency
• VHF - Very High Frequency
• Luminance - intensity of light per unit area
• Luminous efficiency - the ratio of the total
  luminous flux to the total radiant flux of an
  emitting source

http//www.bartleby.com http//nanotechwire.com/ne
ws.asp?nid642ntid123pg2
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Television Marketplace

• Currently still dominated by cathode ray tube
• Beginning to be replaced by flat screen
  applications for home theater, sales
  presentations, and staging, rental, and digital
  signs
• Advantages are thin, lightweight design, wide
  viewing angles and high resolution

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PDP vs. LCD

• PDPs suffer from burn-in unlike LCDs
• Research continues into prevention of burn-in by
  whiting out all potential sources of burn-in
  before damage occurs
• This burn-in can be reversed but reduces life of
  screen
• PDPs deployed in high ambient light environments,
  allowing visual impact to be maintained through
  demanding circumstances

http//www.clarityvisual.com/pdfs/technotes/Direct
ViewLCD_vs_Plasma.pdf
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PDP vs. LCD
http//www.clarityvisual.com/pdfs/technotes/Direct
ViewLCD_vs_Plasma.pdf
7
PDP vs. LCD
http//www.clarityvisual.com/pdfs/technotes/Direct
ViewLCD_vs_Plasma.pdf
8
PDP Life Span
http//www.plasmavision.com/WhitePaperPlasmaVsLCD.
pdf
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PDP vs. LCD
http//www.clarityvisual.com/pdfs/technotes/Direct
ViewLCD_vs_Plasma.pdf
10
PDP vs. LCD
http//www.clarityvisual.com/pdfs/technotes/Direct
ViewLCD_vs_Plasma.pdf
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PDPs vs. LCDs
http//www.plasmavision.com/WhitePaperPlasmaVsLCD.
pdf
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Worlds Largest PDP

• Created by Samsung
• 1920x1080 Resolution
• 160 Degree Viewing Angles
• Now being shown
• Not likely to be commercially available in the
  near future

http//www.hpaonline.com/files/public/putman.ppt3
6
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PDP Structure
http//www.plasmavision.com/WhitePaperPlasmaVsLCD.
pdf
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PDPs vs. LCDs

• PDPs glow red, green, and blue
• LCD sub-pixels approximate colors by subtracting
  wavelengths from white background

http//www.plasmavision.com/WhitePaperPlasmaVsLCD.
pdf
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Why LCD?

• Low power requirements
• Color performance comparable to CRT, flexibility
  in selection of the primary colors
• Lowest cost compared to other FPDs
• Thin and light-weight
• No Screen burn in
• Double the life of Plasma Display Panel (50,000
  to 75,000 hours compared to 25,000 to 30,000
  hours)
• Altitude does not affect the performance. PDP
  performance deteriorates above 6,500 feet

http//www.lcdtvbuyingguide.com/lcdtv-plasmavslcd.
shtml
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Advancements in PDPs

• Early PDPs have luminous efficiency of 0.75 lm/W,
  0.4 lm/W, and 0.15 lm/W for green, red, and blue
  phosphors,
• Current PDPs have luminance and luminous
  efficiency of 350 cd/m2 and 1.2 lm/W and
  operates at 600W
• PDP needs to operate at luminous efficiency of 2
  to 3 lm/W, a peak luminance of 500 cd/m2 and a
  power consumption of 200W to gain market share

http//ieeexplore.ieee.org/iel5/8893/28116/0125748
1.pdf?isNumber28116prodCNFarnumber1257481arS
t45ared51vol.1arAuthorUchiike2CH.3BH
irakawa2CT
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Current Problems with AC PDP

• Low luminous efficiency 1.5 lm/W
• Phosphor conversion 25
• Low efficiency for conversion of electrical
  energy to excitation energy

Boeuf, J.P., et al. "Calculated characteristics
of radio-frequency plasma display panel cells
including the influence of xenon metastables ."
Journal of Applied Physics 92 (2002) 6990-7010.
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Typical Alternating Current Plasma Display Panel

• 2 of power is used to produce vacuum ultra
  violet (VUV)
• 90 of the VUV energy is lost when visible light
  is emitted from the phosphors
• 58 of electrical energy is lost in heating
• 27 energy loss due to electron ionization and
  excitation of neon

Boeuf, J.P., et al. "Calculated characteristics
of radio-frequency plasma display panel cells
including the influence of xenon metastables ."
Journal of Applied Physics 92 (2002) 6990-7010.
19
Improving PDP

• Improving Luminance, Luminous, and Power
  Efficiency
• Use high frequency excitation (13.57-60MHz
  compare to AC PDP 100kHz)
• Improving the Image Quality
• Self-Erasing Discharge

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Xenon in PDP

• Only 15 of energy is used to excite xenon
• 70 of the energy deposit in the Xenon system
  results in generation of UV photons.

Boeuf, J.P., et al. "Calculated characteristics
of radio-frequency plasma display panel cells
including the influence of xenon metastables ."
Journal of Applied Physics 92 (2002) 6990-7010.
21
Why is RF-PDP better?

• Efficiency for converting RF power into xenon
  excitation exceeds 80.
• Typical ac-PDP conversion ratio is 15
• Ion heating in the sheaths is reduced
• Less of the electrical energy input is dissipated
  by ions in the sheath
• More power is deposited in excitation of the
  xenon.
• Low electric fields excitation of xenon is more
  efficient to neon
• Luminous efficiency reported to be 5 lm/W
• Luminance greater than 2000cd/m2

Boeuf, J.P., et al. "Calculated characteristics
of radio-frequency plasma display panel cells
including the influence of xenon metastables ."
Journal of Applied Physics 92 (2002) 6990-7010.
22
Advantages of RF-PDP

• Operates at lower voltage
• Improve Luminance and Luminous efficiency
• RF PDP are 3 times more effective at plasma
  excitation than AC PDP
• This results in lower power consumption

Boeuf, J.P., et al. "Calculated characteristics
of radio-frequency plasma display panel cells
including the influence of xenon metastables ."
Journal of Applied Physics 92 (2002) 6990-7010.
23
Ion Sheaths in RF PDP

• VHF excitation produce high density plasmas with
  low energy ions
• Edge or Skin effects will lead to a maximum ion
  heating. A maximum heating on the edge is
  clearly seen when power (and so plasma density)
  increases.

http//www.icpig.uni-greifswald.de/proceedings/dat
a/Perret_1
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RF PDP Minimum Sustaining Voltage

• Sustained at lower discharge voltage than voltage
  needed for breakdown
• High frequency, electrons are confined in the
  interelectrode gap by the oscillating field.

Boeuf, J.P., et al. "Calculated characteristics
of radio-frequency plasma display panel cells
including the influence of xenon metastables ."
Journal of Applied Physics 92 (2002) 6990-7010.
25
Minimum Applied and Sustain Voltage and Pressure

• Typical AC PDP
• 350 V Applied Voltage
• 135V Minimum Sustain Voltage
• 400 Torr pressure
• RF PDP
• 110 V Applied Voltage
• As low as 30 V Sustained Voltage
• 300 Torr

Fig. 1
Fig. 2
1 Cho, Hyoung J., and Kyung Cheol Choi.
"Improved Luminance and Luminous Efficiency of AC
Plasma Display Panel." IEEE Transaction on
Consumer Electronics 49 (2003) 252-256.
2 Boeuf, J.P., et al. "Calculated
characteristics of radio-frequency plasma display
panel cells including the influence of xenon
metastables ." Journal of Applied Physics 92
(2002) 6990-7010.
26
RF PDP Pixel Structure

• RF Pixel
• Size of pixel 1.26x1.26x1 mm3

Kim,Ki Hyuk Park H.I., Software-Based Analysis
of Radio Frequency Plasma Display Panel for
Efficient Design and Impedance Matching IEEE
Transactions On Components And Packaging
Technologies, Vol. 24, No. 2, June 2001
27
Self-Erasing Discharge

• Improves luminance and color purity by minimizing
  neon emission while strengthening VUV
• Self-erasing discharge produced through
  ramped-square sustain pulse

Traditional Pulses
Ramped Sustain Pulse
H. Tae, B. Cho, K. Cho, S. Chien, New
Color-Enhancing Discharge Mode Using Self-Erasing
Discharge in AC Plasma Display Panel, IEEE
Plasma Science, vol. 31, no. 2, pp. 256-263,
April 2003.
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Traditional Sustain and Discharge
H. Tae, K. Cho, S. Jang, K. Choi, Improvement in
the Luminous Efficiency Using Ramped-Square
Sustain Waveform in an AC Surface-Discharge
Plasma Display Panel, IEEE Trans. Electron
Devices, Vol. 48, No. 7, July 2001, pp.1469-1472.
29
Longer Sustain and Self-Erasing Discharge
H. Tae, K. Cho, S. Jang, K. Choi, Improvement in
the Luminous Efficiency Using Ramped-Square
Sustain Waveform in an AC Surface-Discharge
Plasma Display Panel, IEEE Trans. Electron
Devices, Vol. 48, No. 7, July 2001, pp.1469-1472.
30
Improvements Due to Self-Erasing Discharge
H. Tae, K. Cho, S. Jang, K. Choi, Improvement in
the Luminous Efficiency Using Ramped-Square
Sustain Waveform in an AC Surface-Discharge
Plasma Display Panel, IEEE Trans. Electron
Devices, Vol. 48, No. 7, July 2001, pp.1469-1472.
31
Nanotubes In FPD

• Nano Emissive Display
• Use CNT
• Based on the phenomenon of field emission.
• Consumes 50-70W compares to 700W AC PDP
• Same Performance as PDP
• Stimulates the phosphors directly with electrons
  and eliminates the 3 steps process of PDP.
• Requires a gas to be ionized
• which in turn emits ultraviolet light that
• stimulates a phosphor to produce visible light.
• Manufacturers involving RD Motorola, Samsung,
  Sony

http//www.spectrum.ieee.org/WEBONLY/publicfeature
/sep03/nano.html
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Summary
Plasma display panels continue their market
battle with LCDs. Each has its advantages and
currently dominates particular size
markets Improvements including RF and
self-erasing discharge will continue to improve
quality and drive down costs and power consumption
http//akamaipix.crutchfield.com/products/2003/700
/x700HPN5039-f_MT.jpeg
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Questions and Answers

• For what size televisions, are plasma display
  panels generally regarded as superior?
• 42 inches and above
• What is the efficiency of xenon excitation in RF
  PDP?
• Above 80

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Questions
www.oncoursein.com/ SmallGroupRetreats.htm