Improvement of luminance and luminous efficacy in PDPs

Oversluize, G.; Zwart, S. de; Heusden, S. van; Dekker, T.

doi:10.1889/1.1828749

Cited by 21 publications

(10 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The design of the default 4-in test panels with 256 columns and 48 rows, that resembles the one used in mainstream commercial products, has been described previously [8] and the main layout parameters are given in Table I. A Xe-Ne gas mixture is used.…”

Section: Methodsmentioning

confidence: 99%

“…However, for increasing sustain voltage, the efficacy first decreases slightly, but for powers W/m corresponding to sustain voltages 200 V, the efficacy increases. This increase, which is attributed to a transition to a high efficiency discharge mode (see below), can be more prominent at higher Xe content [8]. The crossover at 1800 W/m for continuous sustaining corresponds to the input power value used in present-day commercial products.…”

Section: A Power Input and Discharge Efficiencymentioning

confidence: 96%

See 1 more Smart Citation

Diagnostics of PDP micro-discharges

Oversluizen

Dekker

2006

IEEE Trans. Plasma Sci.

Self Cite

View full text Add to dashboard Cite

Plasma display panel emission measurements are correlated with panel efficacy trends, and directions for the improvement of the discharge efficiency are derived. An increase of the ratio of the phosphor emission in the visible to the Xe emission in the infrared indicates an increased Xe excitation efficiency. Also, the time dependence and the spatial distribution of the Xe emission are important discharge characteristics. Experiments reveal that a high panel efficacy is obtained, especially for design and driving conditions that govern a fast and spatially distributed discharge development. A high sustain voltage 200 V causes a "high efficiency discharge mode." It is proposed that in this mode, the cathode sheath is not, or is incompletely, formed during the rise of the discharge current. Then the electric field in the discharge cell is dominated not by the space charges, but by the externally applied voltage. The effective discharge field is lowered, resulting in a lower effective electron temperature and more efficient Xe-excitation. Under the fast discharge buildup conditions also the electron-heating efficiency increases due to a decrease of the ion heating losses in the cathode sheath. A high sustain voltage combines well with a high Xe content gas mixture, that further increases the discharge efficiency. Changes in the phosphor to Xeand Ne-emission ratio show that for higher Xe content, a lower electron temperature accounts for a more efficient Xe excitation. Further, the use of a TiO 2 -layer underneath the phosphor causes an increase of the ratio of the phosphor emission in the visible to the Xe emission in the infrared, i.e., an increased Xe excitation efficiency. As a result, a high efficacy of 5 lm/W and a high luminance of 5000 cd m 2 have been realized in a 4-in color plasma display test panel design with a 50% Xe in Ne gas mixture, a TiO 2 -layer underneath the phosphor, and a high sustain voltage 260-290 V.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: A Power Input and Discharge Efficiencymentioning

confidence: 96%

Diagnostics of PDP micro-discharges

Oversluizen

Dekker

2006

IEEE Trans. Plasma Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…For the following measurements, 4-in.-diagonal three-electrode surface-discharge AC test panels having a conven-tional structure 4 were used. The discharge cell pitches were 1.08 mm vertically and 0.36 mm horizontally.…”

Section: Methodsmentioning

confidence: 99%

High‐frequency drive of high‐Xe‐content PDPs for high efficiency and low‐voltage performance

et al. 2004

View full text Add to dashboard Cite

Abstract— It has been well known that the luminous efficiency of PDPs can be improved by increasing the Xe content in the panel. For instance, the efficiency is improved by a factor 1.7 when the Xe content is increased from 3.5% to 30%. The sustain pulse voltage, however, increases from 180 to 230 V by a factor 1.3. It was found that the increase in the sustain pulse voltage can be suppressed by increasing the sustain pulse frequency. The high‐frequency operation further increases the luminous efficiency. If the Xe content is increased from 3.5% to 30% and the drive pulse frequency is increased from 147 to 313 kHz, the luminous efficiency becomes 2.7 times higher and the luminance 4.5 times higher. Furthermore, the increase in the sustain pulse voltage is suppressed 1.1 times, from 180 to 200 V. A mechanism of attaining high efficiency and low‐voltage performance can be considered as follows. A train of pulses is applied during a sustain period. As the sustain pulse frequency is increased, the pulse repetition rate becomes faster and a percentage of the space charge created by the previous pulse remains until the following pulse is applied. Due to the priming effect of these space charge, the discharge current build‐up becomes faster, the width of the discharge current becomes narrower, ion‐heating loss is reduced, and the effective electron temperature is optimized so that Xe atoms are excited more efficiently. The intensity of Xe 147‐nm radiation, dominant in low‐pressure Xe dis‐charges, saturates with respect to electron density due to plasma saturation. This determines the high end of the sustain pulse frequency.

show abstract

“…1, 2 The fundamental property of microdischarge in a PDP cell has been experimentally investigated for the last 10 years, [3][4][5][6][7][8][9][10][11][12] and the high Xe concentration of the discharge gas becomes one of the most promising approaches to improve the luminous efficiency. 13,14 But, the condition of high Xe partial pressure accompanies an increase in breakdown voltage, and the development of new cathode material is strongly required for low voltage PDP operation. One of our interests has been concerned with PDP ignited by a cold cathode with high secondary electron emission induced by the impinging ion, where the yield of secondary electron emission ␥ i is defined as the number of electrons emitted from the cathode per an incident ion.…”

Section: Characteristics Of a Micro Dielectric Barrier Discharge Ignimentioning

confidence: 99%

Characteristics of a micro dielectric barrier discharge ignited by a cold cathode with high ion-induced secondary electron emission for plasma display panel

Uchida

Kajiyama

Shinoda

2009

Journal of Applied Physics

View full text Add to dashboard Cite

We present here measurements of plasma display panel (PDP) ignited by SrO and SrCaO cold cathodes with high yield of ion-induced secondary electron emission (high γi). SrO- and SrCaO-cathode PDPs attain high luminous efficacy at low applied voltage, where the breakdown voltage is 30% lower than that of ordinary MgO-cathode PDP. Current and emission measurement clearly demonstrates that SrO- and SrCaO-cathode PDPs operated at low voltage realize a discharge with smaller current flow and lower electron energy, which are considerably appropriate for high luminous efficacy of PDP. Simulation analysis shows the effect of the high-γi cathode on the luminous efficacy of PDP. A discharge ignited by the high-γi cathode realizes high electron heating efficiency due to the abundant seed electrons from the high-γi cathode, resulting in high luminous efficacy of PDP.

show abstract

Improvement of luminance and luminous efficacy in PDPs

Cited by 21 publications

References 6 publications

Diagnostics of PDP micro-discharges

Diagnostics of PDP micro-discharges

High‐frequency drive of high‐Xe‐content PDPs for high efficiency and low‐voltage performance

Characteristics of a micro dielectric barrier discharge ignited by a cold cathode with high ion-induced secondary electron emission for plasma display panel

Contact Info

Product

Resources

About