• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.29-32
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• 2007

We analyzed the effect of cell resolution on the luminous efficacy through three-dimensional numerical simulation to understand the inherent discharge mechanism change in the plasma display panel. As the resolution increases from VGA to Full HD, the luminous efficacy decreases. With higher Xe content, VUV generation efficacy of Full HD becomes much lower than those of VGA or XGA cells, due to the increased plasma loss and lower electron heating. However a long electrode gap $140{\mu}m$ in Full HD cell with Ne-Xe [20%] results in the high luminous efficacy comparable to that of the XGA cell with $60{\mu}m$ gap. When comparing the effects of Xe content variation on the luminous efficacy of two different subpixel types, i. e., SDE (Segmented electrode in Delta color arrayed, Enclosed subpixel) [1] and conventional stripe barrier type in the XGA and Full HD cells, the luminous efficacy of SDE structure shows higher improvement in Full HD resolution compared with that of conventional type XGA cell, whose cause is identified as the reduced plasma loss.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.4
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• pp.660-667
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• 2008

To improve the luminous efficacy of PDPs, an AC PDP with new metal electrode structure is suggested. Operating voltage margin, power consumption, luminance, luminous efficacy, addressing jitter and ICCD image of test panel with proposed structure are measured, to compared with performances of the conventional ITO structure and proposed structures. To enhance luminous efficacy, we designed new structure which have asymmetric metal electrode structure. The experimental results show that the suggested structure shows luminance to maximum 89% and luminous efficacy to maximum 107% compared with conventional ITO standard structure. In addition, proposed structures with asymmetric electrode show low power consumption by $2{\sim}3%$, high luminance by $5{\sim}7%$, and high luminous efficacy by $2{\sim}3%$ compared with proposed symmetric electrode structures.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.6
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• pp.7-13
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• 2008

Through two-dimensional numerical simulations, we analyzed the effects of new cell structure for the luminous efficacy improvement in an ac plasma display panel. In the new structure with 5 electrodes, two auxiliary electrodes are arranged between X and Y electrodes with long gap. Through the application of adequate auxiliary pulse on the address electrode, the luminous efficacy in the new cell structure showed the improvement of 52[%] in comparison with that of conventional cell structure with short gap between X and Y electrodes. Consequently, as the short gap discharge between auxiliary electrodes decreases and the long gap discharge between X and Y electrodes increases, the result of VUV generation efficacy shows higher improvement. The reliability of simulation result could he confirmed by the experimental result in the test panel.

• Proceedings of the KIEE Conference
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• 1991.11a
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• pp.423-426
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• 1991

A Plasma Display Panel with Double Pulse Memory was fabricated and its luminance and luminous efficacy were investigated. Application of non-discharge pulses to an auxiliary anode increased luminance by 43% and luminous efficacy by 33%. Compared to PDP with PPM(Planar Pulse Memory) driving technique, PDP with DPM obtained higher luminous efficacy and consumed lower power with the same delay time.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.65-68
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• 2008

In this study, in order to improve luminous efficacy of AC-PDP, the new facing discharge structure has been suggested. The suggested structure has tilted facing electrode. It shows lower discharge current, higher luminance and luminous efficacy compared with those of reference structure with coplanar electrode structure.

• 한국정보디스플레이학회:학술대회논문집
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• 2002.08a
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• pp.79-82
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• 2002

In this paper, we investigate the characteristics of luminous efficacy as a function of Xe partial pressure in AC PDP. SDR structure has shown much larger increment of luminous efficacy compared with the conventional one especially below 10% Xe contents. The luminous efficacy around 4.0 lm/W is achieved with Ne-Xe10%, 400Torr in Monochrome green phosphor test panel under 10kHz continuous sustaining frequency.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.8
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• pp.1422-1428
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• 2008

In the current PDP technology, one of the most important issues in AC PDP is improvement of luminance and luminous efficacy. To improve luminance and luminous efficacy, new cell structure of PDP containing long discharge path is necessary. However, it causes an increment of firing voltage. In order to decrease firing voltage of AC PDP having long discharge gap, the protrusion electrode is proposed. To drop the firing voltage, the protrusion electrode is inserted into the forward area of the main discharge gap. This paper presents measurements of detailed optical and electrical characteristics of AC PDP with protrusion electrodes. The experimental results show that the proposed structure with gap 80um has lower firing voltage to 27V than that of the conventional long gap structure. Moreover, the ICCD(Intensified Charge Coupled Device) images of the proposed structure show quick discharge generation by 0.07usec and longer continuation by 0.05usec than that of the conventional long gap structure. Therefore, the proposed protrusion electrodes have higher luminance by 12.5% than that of the conventional structure, as having no decrement of Luminous efficacy.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.88-90
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• 2003

We reported an AC PDP structure with grooved front panel dielectric layer. The structure exhibits low breakdown voltage, better luminance, and better endurance to crosstalk in high Xe contents. It also shows less luminous efficacy then conventional structure because of the thinner dielectric layer, but we can apply the higher Xe contents to the grooved dielectric structure, which results in the higher luminous efficacy. We made experiments with the Xe contents from 4 to16% and total gas pressure from 400 to 600Torr. The grooved dielectric structure shows the improvement of 20% luminous efficacy and 17% luminance. The firing voltages lower about 40V at 600Torr and Xe 12, 16%. The discharge characteristics of grooved dielectric structure are verified also with 2D simulation.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.20-23
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• 2009

The efficacy improvement issues in a unit discharge cell have been approached from the structural considerations. The tested cell designs include (a) a coplanar type with annular auxiliary electrode buried in barrier ribs, (b) a coplanar type with split auxiliary electrodes also burred in barrier ribs and (c) a coaxial type with a floating electrode stacked on the base electrode. From spatiotemporally resolved optical images of near-IR emission taken by a gated-ICCD camera and relative VUV emission intensity estimated by laser absorption spectroscopy, the differences in the discharge and light emission performances of those three cell types have been compared and discussed.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.5
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• pp.982-988
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• 2009

In a surface type ac PDP having $200{\mu}m$ gap between the surface electrodes, the luminous efficacy has a reciprocal dependence on the sustaining frequency. The discharge current flowing to the address electrodes are measured to investigate the phenomena and spectral intensity from visible light to infra red is measured to verify phosphor saturation with the frequency. Experiments show the discharge between the address and surface electrodes deteriorates the efficacy in high sustaining frequencies. Pulse width modulation is introduced to improve the efficacy. In optimum conditions, we obtained 1.99lm/w and 1.79lm/w at 200kHz and 250kHz, respectively.