Projector with guiding rib in vent

Details Projector with guiding rib in vent Projector with guiding rib in vent

2001-08-29

2002-12-24

Adams, Russell (Department: 2851)

Optics: image projectors

Temperature control

Blower

C353S057000, C353S119000

Reexamination Certificate

active

06497489

ABSTRACT:

BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to a projector, and more particularly, to a projector with a vent that has a guiding rib.
2. Description of the Prior Art
Projectors are common devices used for displaying still images or motion videos onto a screen. As a result, projectors are widely used in businesses to make presentations, or to facilitate training. To accomplish these ends, the projectors have some form of light-emitting source. Please refer to
FIG. 1
, which is a diagram of a prior art projector
10
. The projector
10
comprises a housing
11
, a light source
12
installed in the housing
11
, a fan
13
installed on the housing
11
, and an air vent
14
installed next to the fan
13
. Typically, the light source
12
, in addition to producing light, also generates a significant amount of heat. So as to avoid damaging the projector
10
, the light source
12
is equipped with the fan
13
and the air vent
14
. The fan
13
and the air vent
14
together facilitate radiation of heat away from the light source
12
, and out of the housing
11
.
One shortcoming of the prior art projector
10
lies in the design of the air vent
14
. Because the air vent
14
is curved, heat flowing in the air vent
14
exhibits turbulence, which slows heat flow in the air vent
14
, and reduces the ability of the projector
10
to dissipate heat. Furthermore, the turbulence generates noise, which reduces audibility of the presenter, and affects audio quality in a case of taping the presentation.
SUMMARY OF INVENTION
It is therefore an objective of the present invention to provide a projector with an improved air vent that increases heat dissipation, and reduces noise caused by turbulence in the air vent.
Briefly, a projector according to the claimed invention comprises a housing, a light source positioned within the housing, a fan positioned beside the light source to dissipate heat from the light source, and an air vent positioned beside the fan to direct heat away from the housing. The air vent comprises at least one guiding rib for guiding the heat so as to increase a flow rate of the heat through the air vent.
It is an advantage of the present invention that the guiding rib in the air vent of the projector increases a flow of heat in the air vent, which increases heat dissipation, and reduces noise.
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 embodiment, which is illustrated in the various figures and drawings.


REFERENCES:
patent: 6132049 (2000-10-01), Yamaguchi et al.
patent: 6254238 (2001-07-01), Takamatsu
patent: 6334686 (2002-01-01), Shiraishi et al.
patent: 6422703 (2002-07-01), Wang et al.
patent: 6443575 (2002-09-01), Miyamoto et al.

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