Real object projector

Details Real object projector Real object projector

2003-09-30

2004-11-09

Gray, David (Department: 2851)

Optics: image projectors

Epidiascope

C353S087000, C353S119000, C353S120000, C349S006000

Reexamination Certificate

active

06814447

ABSTRACT:

BACKGROUND OF INVENTION
1. Field of the Invention
The invention relates to a real object projector, and more particularly, to a real object projector which is combined with a movable light source module and can project transparent films directly.
2. Description of the Prior Art
Projectors or projection tools are commonly used for displaying visual aids during presentations or conferences
FIG. 1
shows a conventional projector. An image apparatus
12
is installed on a base
10
, and the image apparatus
12
includes an arm
14
and a lens
16
. When projecting an object
18
, the object
18
is placed under the lens
16
, and the lens
16
focuses on the object
18
. A user can adjust the magnification of the image and adjust the focus with the lens
16
according to his requirements.
However, when a user needs to project a transparent film, the projector fails to project the transparent film, since a bottom light source is needed. An extra light source module
20
is required for the projector to project the transparent film
22
, as
FIG. 2
shows. Lacking a light source module
20
prevents the projection of the transparent film
22
.
The method of projecting a transparent film is by placing the transparent film
22
on top of the light source module
20
, and under the lens
16
and focusing the lens
16
on the transparent film
22
. Then the user adjusts the projected image size and focus according to the size of the transparent film. When there is more than one size of transparent film
22
, users need to continuously adjust the projected image size and focus according to the different transparent films
22
. This is inconvenient and results in a poor quality of presentation.
Therefore, there is need for an improved real object projector to project kinds of transparent films.
SUMMARY OF INVENTION
It is therefore an objective of the present invention to provide a real object projector to solve the above-mentioned problems. A light source module is installed on a base of the real object projector to project a transparent film. The projection method can optimally magnify images in accordance with various sizes of transparent films.
According to the claimed invention, a light source module is connected to a base of a real object projector, and the light source module and the base have a connecting relationship. The base filter comprises a control circuit and an image receiving apparatus. The image receiving apparatus receives images on the transparent film that is placed on the light source module. The transparent film can further comprise an identification mark on the transparent film clip, and different types or sizes of transparent films have different identifying marks.
The projection method using the real object projector comprises: automatically or manually moving the image receiving apparatus to a suitable position in accordance with the mark on the transparent film clip; then automatically or manually focusing the image receiving apparatus according to the transparent film clip; and pressing an image receiving key to magnify the projected image via a control circuit; or automatically identifying the kind or type of transparent film and magnifying the projected image.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiments that are illustrated in the various figures and drawings.


REFERENCES:
patent: 4338006 (1982-07-01), Ozeki
patent: 5353075 (1994-10-01), Conner et al.
patent: 5530496 (1996-06-01), Mizukawa et al.
patent: 6065839 (2000-05-01), Miyata et al.
patent: 6145229 (2000-11-01), Able

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