Background
With broadband networking growing more advanced and widespread, very large video displays are expected to be vital adjuncts to the next generation of networking, connecting people together in a visual space that helps them share information directly and participate in a shared environment. Display technologies that enable life-size images of people and objects to be displayed, for example in a display that covers an entire wall of a room, are considered vital in linking people together through virtual shared environments. The advent of extremely large screen displays, therefore, can be considered indispensable to the widespread adoption of next-generation broadband media applications.
Technological Issues
For indoor screen displays measuring more than 100 inches, front projectors have conventionally been used, but this approach has a variety of drawbacks, chief among them the inability to produce a sharp picture except in a dark room. Because of these drawbacks, there was a desire for large-screen displays using an emissive-type display. Another approach, creating an array of light-emitting diodes (LEDs), is already available commercially, but creating a grid of millions of LEDs is difficult to do at a reasonable cost. Such a grid would require large-scale matrix drivers, which consume heavy amounts of electricity, making the power requirements of a 100-inch indoor display exceed 3000 watts.
Plasma display panels, based on emissive principle using discharge, actually have better luminous efficiency at larger sizes, so PDPs have a clear advantage over other types of displays in that the bigger they are, the more power efficient they are (in terms of power consumption per inch of screen size). Still, producing a 100-inch PDP would require glass substrates measuring more than two meters across, entailing large-scale facilities and considerable capital investment.
The plasma tube-related technologies have the following features:
Future Development
The technology is currently being evaluated for luminance lifetime and other reliability factors, and production and assembly techniques are also being developed. Fujitsu expects to complete the reliability assurance process and the development of fabrication and assembly equipment within two years.
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A Fujitsu Services é uma das empresas de serviços de Tecnologia de Informação líder na Europa, Médio Oriente e África. O resultado anual é de €3.3 mil milhões, emprega 18.000 pessoas e opera em mais de 20 países. Desenha, desenvolve e opera sistemas de tecnologias de informação e serviços para clientes nos serviços financeiros, telecomunicações, retalho, utilities e mercados governamentais. As suas competências chave são o fornecimento de gestão de infra-estrutura de Tecnologias de Informação e outsourcing através de ambientes de desktop, redes e centros de dados, juntamente com uma gama completa de serviços relacionados, desde consultoria até à integração e desenvolvimento. Com sede em Londres, a Fujitsu Services é braço europeu de serviços de Tecnologias de Informação da Fujitsu. O Grupo Fujitsu, com receitas de €33.4 mil milhões, é líder em sistemas de Tecnologias de Informação orientados para o cliente e serviços para o mercado global. O site da Fujitsu Services: www.fujitsu.pt.
Paula Teixeira
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EmpresaFujitsu Services
Date: 13 December, 2003