Projecting method for picture display apparatus

Details Projecting method for picture display apparatus Projecting method for picture display apparatus

1992-06-02

1994-02-08

Groody, James J.

Television

Video display

Projection device

348766, H04N 574, H04N 931

Patent

active

052852873

ABSTRACT:
A projection display device capable of selectively operating in a front projection mode and a rear projection mode, comprises a projector (300) disposed in a cabinet, a rear projection screen formed in a wall of the cabinet, and a front projection screen disposed outside the cabinet. To permit selection between the front and rear projections, the projector may be detachably mounted on the cabinet: when it is mounted the image rays (110) are introduced into the cabinet for the rear projection, while when it is detached it can be used for the front projection. In another embodiment, a selective light guide directs the image rays either to the rear projection screen or to the front projection screen. In a further embodiment, the rear projection screen can change between transparent and translucent states. When it is transparent, the image rays are passed therethrough to the front projection screen.

REFERENCES:
patent: 5097323 (1992-03-01), Sato et al.
"Field Controlled Light Scattering from Nematic Microdroplets," Doane et al., 1986 American Institute of Physics, pp. 269-271, vol. 48, No. 4, Jan. 27, 1986.

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