Optics: motion pictures – Removable film strip magazine type
Patent
1983-09-09
1985-12-03
Wintercorn, Richard A.
Optics: motion pictures
Removable film strip magazine type
352104, 353 72, G03B 2156, G03B 2110, G03B 2130
Patent
active
045562830
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a screen device used for a video projector or the like.
2. Description of the Prior Art
In a usual video projector system, an image projected from a projector is directed to a screen via a reflector.
In the prior art system, the screen is supported in the state projected from a support by screen poles projecting therefrom.
This type of screen is large in size as a whole, so that it can be installed only in comparatively large rooms. It also has great influence on the effect of the interior decorative design, and if it is too large, it is obstructive when it is out of use, so that it is rather impractical as an indoor device.
Further, with the prior art device of this type, the screen surface is exposed at all times so that it is liable to be contaminated by attached dust to reduce the reflectivity of the screen.
SUMMARY OF THE INVENTION
The present invention is directed to overcoming the various difficencies of the prior art screen, and its object is to provide on automatic screen, which has a mechanism for permitting a screen to be accommodated in a cabinet to make it compact when the projector system is out of use and also permitting the screen to be readily brought out from the cabinet to a working position in response to a swtich operation or the like.
According to the present invention, there is provided an automatic screen, which comprises a screen and a cabinet capable of accommodating the screen and a front door pivoted or hinged to the front of the cabinet for opening and closing the cabinet. The screen and front door can be moved relative to each other by a common driving mechanism in a well-bucket fashion when the screen is brought out of and into the cabinet. When using the projector system for projection of an image onto the screen, the screen is brought to a position projected from the cabinet concurrently with the opening of the cabinet front door, and is held at the projected position. After use, the screen can be brought into the cabinet and the cabinet front door is closed. The screen thus can be held projected from the cabinet only while the projector is in use, and at other times the cabinet front door is held closed so that the device looks like an ordinary indoor furniture and can be utilized as an interior decorative item. Further, since the screen is not exposed but is accommodated in the cabinet when the projector is out of use, there is no possibility of accidentally breaking the screen. Furthermore, the device as a whole is compact and convenient for arrangements that may be done when the projector system is out of use.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an external perspective view showing a screen device according to the present invention, with FIG. 1(A) showing the device in the state with the screen accommodated and FIG. 1(B) showing the same in the state in use for projection;
FIG. 2 is diagrammatic side view of the relative movement relation among a front door, a screen and a top door, with FIG. 2(A) showing the state with the screen accommodated, FIG. 2(B) showing the state with the screen being moved out of or into a Cabinet, and FIG. 2(C) showing the state with the screen in the projected position;
FIG. 3 is a perspective view showing the back side of the internal construction of an embodiment of the automatic screen according to the present invention; and
FIG. 4 is a perspective view showing the back side of the internal construction of a different embodiment of the automatic screen according to the present invention.
BEST MODE OF THE INVENTION
Now, the best mode of the present invention will be described with reference to FIGS. 1 through 4 of the accompanying drawings.
FIG. 1(A) is an exterior view showing an embodiment of the present invention in an out-of-use state with a screen accommodated in a cabinet, and FIG. 1(B) is an exterior view showing the device in use with the screen projected from the cabinet.
As shown in FIG. 1, a cabinet 1 of the automatic screen accordi
REFERENCES:
patent: 2812808 (1957-11-01), Nicholas
patent: 4351592 (1982-09-01), Link et al.
Kokubo Takashi
Numata Kiyoshi
Yoshida Toshihiro
Sony Corporation
Wintercorn Richard A.
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