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Plasma display produces 5.7 lumens per watt

Posted by iTech - 2005-10-07

MAKUHARI, Japan — A joint plasma display R&D company in Japan has announced that it has improved luminous efficiency to 5.7 lumens per watt for an 11-inch display prototype and 3.5 lumens per watt for 43-inch prototype, both being exhibited at CEATEC Japan here this week.

The joint R&D company, Advanced PDP Development Center Corp. was formed in July 2003 by Japanese PDP makers Fujitsu Ltd., Hitachi, Ltd., Matsushita Electric Industrial Co., Ltd., Pioneer Plasma Display Corp. and Pioneer Corp., to develop a low power consumption PDP and a low energy consuming production process.

One target was to achieve a 5 lumen per watt efficiency by refining gas discharge mechanisms, fluorescent materials and driving circuitry for plasma displays. If the luminous efficiency is improved, less power is required to display at the same brightness.

Though PDP makers have been working to improve the efficiency for years, they have been previously limited to producing no more than 2 lumens per watt.

The Advanced Plasma Display Development Center expects that a 40-inch panel with the 5-lumen per watt efficiency can lower the power consumption from typical 390 watts to 100 watts.

The other target is to develop a new production process that can cut the energy required to manufacture panels by two-thirds. APDC plans to reduce the 250 kWh (kilowatt-hours) of energy required to produce one panel in 2003 to 80 kWh.

New Energy and Industrial Technology Development Organization (NEDO), an affiliate of the Ministry of Economy, Trade and Industry (METI), subsidized APDC as a part of low power consumption next generation PDP project, which APDC plans to complete in the third year of the project next year. "We have managed to achieve the targets," said Osamu Yamada, president of APDC.

APDC plans to transfer the technologies, whose details were not disclosed, to the founder PDP companies and related organizations when the project ends in March 2006.

Both 3.5 and 5.7 lumens per watt are the top emitting efficiencies achievable, said a spokesman of APDC. But it will take time until the panel with 5.7 lumens per watt actually hits the market, he said.

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