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

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