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Plasma Display Panel
David Phantana-angkool
Chris Rodgers
http://www.unitedvisual.com/eos/Product.asp?dept_id=7&product_id=5612
Questions
For what size televisions, are plasma display panels generally regarded as superior?
What is the efficiency of xenon excitation in RF PDP?
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/news.asp?nid=642&ntid=123&pg=2
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
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/DirectViewLCD_vs_Plasma.pdf
PDP vs. LCD
http://www.clarityvisual.com/pdfs/technotes/DirectViewLCD_vs_Plasma.pdf
PDP vs. LCD
http://www.clarityvisual.com/pdfs/technotes/DirectViewLCD_vs_Plasma.pdf
PDP Life Span
http://www.plasmavision.com/WhitePaperPlasmaVsLCD.pdf
PDP vs. LCD
http://www.clarityvisual.com/pdfs/technotes/DirectViewLCD_vs_Plasma.pdf
PDP vs. LCD
http://www.clarityvisual.com/pdfs/technotes/DirectViewLCD_vs_Plasma.pdf
PDPs vs. LCDs
http://www.plasmavision.com/WhitePaperPlasmaVsLCD.pdf
World’s 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.ppt#36
PDP Structure
http://www.plasmavision.com/WhitePaperPlasmaVsLCD.pdf
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
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
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/m^2 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/m^2 and a power consumption of 200W to gain market share
http://ieeexplore.ieee.org/iel5/8893/28116/01257481.pdf?isNumber=28116&prod=CNF&arnumber=1257481&arSt=+45&ared=+51+vol.1&arAuthor=+Uchiike%2C+H.%3B++Hirakawa%2C+T
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.
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.
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
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.
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/m^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.
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.
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/data/Perret_1
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.
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
[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.
QuickTime™ and aTIFF (LZW) decompressor
are needed to see this picture.
Fig. 1
Fig. 2
RF PDP Pixel Structure
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
RF Pixel Size of pixel =
1.26x1.26x1 mm^3
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.
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.
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.
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.
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. 1. Requires a gas to be ionized2. which in turn emits ultraviolet light that3. stimulates a phosphor to produce visible light.
Manufacturers involving R&D: Motorola, Samsung, Sony
http://www.spectrum.ieee.org/WEBONLY/publicfeature/sep03/nano.html
Summary
http://akamaipix.crutchfield.com/products/2003/700/x700HPN5039-f_MT.jpeg
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
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%
Questions
www.oncoursein.com/ SmallGroupRetreats.htm