Matsushita Electric Industrial Co Ltd will release the "PT-LW80NT," "PT-LB80NT" and "PT-LB75NT," wireless LCD projectors that feature the "dust-free structure," in sequence from May 26, 2008.
The projectors are designed to prevent dust from lowering their luminance when they are "hung from the ceiling," an installation method that is being increasingly used in recent years, while inheriting a wireless mechanism that requires no cables to connect to a PC. Projectors hung from the ceiling face the problem of dust entering projectors and adhering to internal optical components, causes luminance to be lowered during long-term use.
The new products have employed a seamless "touch sensor" for their operating parts. Moreover, they realized a dust-free structure through other efforts such as a lens cover, protecting the zoom/focus adjustment ring with a cover and deploying highly-effective micro-cut filters for air filtering, for example.
When recreating the environment of 2,800 hours of use under standard conditions in terms of the amount of floating dust (0.15mg/m3) as provided in Japan's Building Sanitation Law using a dust tester, the degradation of luminance was 1/3 as much compared with the "TH-LB60NT," Matsushita said (multiple kinds of JISZ8901 test powders were used as dust).
In addition, maintenance loads have also been reduced as the projectors have employed the "rear lamp replacement" structure that enables users to replace lamps without removing projectors from the ceiling.
Matsushita added the industry's first wide model to the lineup of portable type (net weight of 3kg or less) wireless projectors as well (as of April 23, 2008, data provided by Matsushita). The model can display wide-screen PC images using an entire screen. There are no suggested retail prices.
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