Optical: systems and elements – Projection screen – Unitary sheet comprising plural refracting areas
Reexamination Certificate
1999-12-06
2002-01-08
Mahoney, Christopher E. (Department: 2851)
Optical: systems and elements
Projection screen
Unitary sheet comprising plural refracting areas
C359S460000, C160S115000
Reexamination Certificate
active
06337769
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to an image display system using blinds near a window as a rear screen, which can be used for information delivery, advertisement, and publicity by displaying image on the blinds from a projector.
2. Description of the Prior Art
Generally, in order to view image in a slide film with use of a projector, after installing a screen in a suitable position, the image is projected on the screen from the projector.
In addition, when using the screen as a rear screen, the image from the projector is displayed through a rear surface of the screen. Therefore, when installing the rear screen to a window, the image outputted from the projector can be displayed outside the window so that the image can be seen from outside.
Such system for displaying image outside the window with installing the screen as a rear screen to the window is disclosed in Japanese Patent Publication No. Showa 6-195027.
The Japanese Patent Publication No. Showa 6-195027 is described with reference to FIG.
1
and FIG.
2
.
FIG. 1
exemplarily shows a conventional image display system using a rear screen.
FIG. 2
shows configuration of the image display system of FIG.
1
.
As shown in
FIGS. 1 and 2
, the invention of the publicized Japanese patent “Information Transferring System ” consists of a screen
10
installed inside a window
14
of a building
13
for displaying image on a rear surface thereof, a projector
12
for displaying image on the screen
10
, a plurality of sound information output units
20
for outputting sound corresponding to the displayed image, a containment regenerating unit
11
for providing image signal and sound signal to the projector
12
and the sound information output unit
20
, and a signal distributor
22
for dividing and outputting sound signal from the containment regenerating unit
11
to the sound information output unit
20
.
The image outputted from the containment regenerating unit
11
of such system is projected on the screen
10
installed beside the window
14
of the building
13
and then displayed to the rear surface of the screen
10
. The sound signals outputted from the containment regenerating unit
11
is divided through the signal distributor
22
and then outputted to a plurality of the sound information output unit
20
.
Through such process, the image and sound outputted from the containment regenerating unit
11
in the building
13
are displayed outside the window
14
so be viewed and heard from outside.
However, such image display system using the conventional rear screen should be installed to the window separately. Moreover, when displaying image with use of the system, the blinds employed to the window should be removed completely. In addition, there is another problem that means for providing image and sound is limited in one sort.
SUMMARY OF THE INVENTION
The present invention is designed to overcome above problems of the prior art. Object of the present invention is to provide an image display system using blinds, which employs the blinds as a rear screen and displays image outputted from a projector, possibly connected to variable image devices.
In order to accomplish the above object, the present invention provides an image display system including blinds installed in front of a window for displaying image through a rear surface thereof, and a projecting unit for projecting image to the blinds.
REFERENCES:
patent: 4739567 (1988-04-01), Cardin
patent: 6123137 (2000-09-01), Levert
patent: 06195027 (1994-07-01), None
Bacon & Thomas
Cruz Magda
Hanil Vision Information Co., Ltd.
Mahoney Christopher E.
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