Optics: image projectors – Cabinet encloses projector and one side of screen
Patent
1995-03-09
1997-03-18
Dowling, William
Optics: image projectors
Cabinet encloses projector and one side of screen
359457, 359456, 359454, G03B 2160
Patent
active
056116110
ABSTRACT:
A rear projection type display system with a transmissive screen. A transparent reinforcing plate is coupled to a lenticular sheet of the screen on the light output side by a connective member to broaden the horizontal diverging angle by 60 degrees or more to the right and left sides. The duty factor of a black stripe formed on the lenticular sheet is set to 60% or more so improve the contrast of an image. The diverging angle at each point of a vertically-diffusing lens for diverging light in the vertical direction is modulated in accordance with the height of each point to offer a proper visual angle range in the vertical direction.
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Itoh Takashi
Iwahara Yoshiaki
Kamiya Makoto
Kuroda Shoji
Ogino Masanori
Dowling William
Hitachi , Ltd.
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