Door videophone capable of rotating a camera

Details Door videophone capable of rotating a camera Door videophone capable of rotating a camera

2000-04-11

2004-08-10

Vu, Ngoc-Yen (Department: 2612)

Television

Camera, system and detail

Remote control

C348S373000, C348S156000, C348S151000

Reexamination Certificate

active

06774936

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a door videophone for visually observing an outdoor caller and talking with the caller, and, more particularly, to a door videophone capable of rotating a camera in order to observe total looks of an outdoor caller.
DESCRIPTION OF THE PRIOR ART
Generally, when a caller calls at a person's house, it is necessary that a host of the house observes whether the caller is acquaintance or not and, then, opens a door.
Referring to
FIG. 1
, there is shown a conventional door videophone for observing a caller.
As shown in
FIG. 1
, the conventional door videophone includes a main body
10
having a monitor
12
, a bell box
20
having a camera
22
for transmitting image of a caller to the monitor
12
, an electronic lock
30
disposed at door and a power supply
40
for providing electric current to the main body
10
, the monitor
20
and the lock
30
. The main body
10
is located indoors and the bell box
20
is located outdoors.
The main body
10
also has a release switch
14
for unlocking the electronic lock
30
, a hook switch
16
for operating the monitor
12
and a handset
18
for talking with the caller. The hook switch
16
is turn on when the handset
18
is lifted.
The bell box
20
also has a bell switch
24
for ringing a bell.
The operation of the conventional door videophone structured as above-mentioned will be explained.
When the caller turns on the bell switch
24
to ring the bell, a host lifts the handset
18
to turn on the hook switch
16
. In this case, the image of the caller photographed by the camera
22
is displayed on the monitor
12
so that the host can observe the caller and, then, the host turns on the release switch
14
to unlock the electronic lock
30
.
However, in the conventional door videophone, since the photographing direction of the camera cannot be adjusted, photographing area of the camera is extremely limited.
Therefore, when the caller gets out of the photographing area, the camera cannot photograph the total looks of the caller and, consequently, the host cannot correctly observe looks of the caller through the monitor.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a door videophone capable of rotating a camera to enlarge a photographing area of the camera.
In accordance with an aspect of the present invention, there is provided a door videophone capable of rotating a camera, comprising: a main body having a monitor for displaying an image of a caller, and being located indoors; a bell box having the camera for photographing looks of the caller and transmitting the image of the caller to the monitor, and being located outdoors; an actuating means for rotating the camera, and being disposed in the bell box; and a control means for generating an operation control signal associated with the actuating means, and being disposed at the main body.
In accordance with another aspect of the present, there is provided an actuator for rotating a camera upward, downward, left and right, comprising: a base plate for supporting the camera; at least one first driving means for generating a rotation force to rotate the base plate upward and downward; at least one first transmitting means for transmitting the rotation force generated by the first driving means to the base plate; at least one second driving means for generating a rotation force to rotate the base plate left and right; at least one second transmitting means for transmitting the rotation force generated by the second driving means to the base plate; and a control means for generating an operation control signal associated with the first and second driving means.


REFERENCES:
patent: 4498738 (1985-02-01), Kumai
patent: 5717379 (1998-02-01), Peters
patent: 5745166 (1998-04-01), Rhodes et al.
patent: 5923363 (1999-07-01), Elberbaum
patent: 04-330888 (1992-11-01), None
patent: 08-070448 (1996-12-01), None

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