Television – Video display – Projection device
Patent
1995-03-30
1997-03-25
Peng, John K.
Television
Video display
Projection device
348744, 349 86, H04N 931
Patent
active
056149620
ABSTRACT:
In a projection-type display apparatus using light scattering type liquid crystal devices, light from a light source is reflected by a reflecting mirror through a collecting lens; reflected light is converted by a lens into a parallel light beam, which is injected into liquid crystal devices disposed on three sides through a dichroic mirror, the liquid crystal devices coloring an image in red, green and blue; the image is projected on a screen through again the dichroic mirror, the collecting lens and an enlarging lens. Further a photodetector is disposed at a focal point of the collecting lens and a function of adjusting the position of the light source on the basis of a result of this detection is added.
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Fukuda Kyohei
Hoshino Minoru
Mikami Yoshiro
Mori Yuji
Nagae Yoshiharu
Grant Chris
Hitachi , Ltd.
Peng John K.
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