Optics: image projectors – Lens support – Lens position adjustable
Reexamination Certificate
2007-04-24
2007-04-24
Perkey, W. B. (Department: 2851)
Optics: image projectors
Lens support
Lens position adjustable
C353S119000, C349S057000
Reexamination Certificate
active
10901989
ABSTRACT:
If a projection display device includes a shifting mechanism for shifting a projection lens to adjust the direction in which the display projects an optical image, it is difficult to find suitable position where the display should be installed. Thus, the projection lens is fitted with a projection angle adjusting mechanism, which includes an adjusting dial having a scale representing the position of the lens relative to a display element. The projection display device is capable of automatically displaying on the projected optical image a scale image corresponding to the scale. The projection display also is capable of displaying on the projected optical image the position of the optical axis of the projection lens, which can be shifted by the adjusting mechanism.
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Nakayama Satoshi
Oshima Hiroshi
Shikita Kazuo
Shimizu Takuya
Yamasaki Futoshi
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Perkey W. B.
Sever Andrew
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