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Plasma display panel design for simultaneous high efficacy and high luminance

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3 Author(s)
Oversluizen, G. ; Philips Research Laboratories, Eindhoven, The Netherlands ; De Zwart, S.T. ; Dekker, T.

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The plasma display panel efficacy is known to decrease at high luminance, due to both phosphor and plasma saturation. Especially the default green phosphor Willemite is sensitive to saturation. It is shown that an alternative green phosphor, Y1-xGdxBO3:Tb3+, is less sensitive to saturation than Willemite. Also plasma saturation is decreased in a “high efficiency discharge mode,” for design and driving conditions that govern a fast and spatially distributed discharge development. High Xe-content panels, with somewhat higher drive voltages, are especially suited for operation in this discharge mode. Further, in the high efficiency discharge mode a high luminance is obtained, enabling high resolution designs with a relatively small emissive area. For proper designs, operating in the high efficiency discharge mode and using less saturating phosphors, the combination of a high efficacy and a high luminance is achieved. For VGA resolution 5 lm/W and 5000 cd/m2 and for XGA resolution 4 lm/W concurrent with a luminance of 3400 cd/m2 has been realized in low cost stripe-type barrier rib structures, that were sand-blasted in soda-lime glass. Finally, it is shown that the increasing wall charge loss for increasing discharge confinement at higher resolution causes mainly higher operation voltages, while the influence on discharge efficiency is relatively small.

Published in:

Journal of Applied Physics  (Volume:103 ,  Issue: 1 )