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Plasma Display Panel David Phantana-angkool Chris Rodgers

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Presentation on theme: "Plasma Display Panel David Phantana-angkool Chris Rodgers"— Presentation transcript:

1 Plasma Display Panel David Phantana-angkool Chris Rodgers

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

4 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

5 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

6 PDP vs. LCD

7 PDP vs. LCD

8 PDP Life Span

9 PDP vs. LCD

10 PDP vs. LCD

11 PDPs vs. LCDs

12 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

13 PDP Structure

14 PDPs vs. LCDs PDPs glow red, green, and blue LCD sub-pixels approximate colors by subtracting wavelengths from white background

15 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

16 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 ke%2C+H.%3B++Hirakawa%2C+T

17 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):

18 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):

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

20 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):

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/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):

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):

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.

24 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):

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 [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): [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): Fig. 1 Fig. 2

26 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

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 , April 2003.

28 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

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

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

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. 1. Requires a gas to be ionized 2. which in turn emits ultraviolet light that 3. stimulates a phosphor to produce visible light. Manufacturers involving R&D: Motorola, Samsung, Sony

32 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

33 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%

34 Questions SmallGroupRetreats.htm


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