Backlighting construction for use in computer-based display systems having direct and projection viewing modes of operation
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United States of America Patent
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Sep 19, 2006
Issued Date -
N/A
app pub date -
Aug 14, 1998
filing date -
Oct 13, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reconfigurable backlighting construction for use in portable computer-based systems having direct and projection viewing modes of operation is provided. These computer-based systems are capable of selectively displaying color video images on an actively driven display surface, or projecting such video images onto a wall surface or projection screen without the need for a bulky overhead projector, required by all prior art systems. These computer-based systems can be easily reconfigured for projection viewing without physical removal of the light guiding panel and its light diffusing structures. A portable light projection accessory device is also provided for use with the portable computer-based systems of the present invention. The portable light projection device has first and second housing portions that are interconnected by a foldable structure that permits the first and second housing portions to be selectively reconfigured for simple trouble-free use during the projection viewing mode of operation, and for compact storage during the direct viewing mode of operation.
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