Illumination – Light source and modifier – Ionized gas or vapor light source
Reexamination Certificate
2002-04-05
2004-03-30
O'Shea, Sandra (Department: 2875)
Illumination
Light source and modifier
Ionized gas or vapor light source
C362S264000, C362S551000, C315S085000
Reexamination Certificate
active
06712488
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electrodeless lighting apparatus, and particularly, to a globe type electrodeless lighting apparatus which is able to extend a lighting area with a simple structure.
2. Description of the Background Art
Generally, an electrodeless lighting apparatus is a device emitting visible rays or ultraviolet rays by radiating microwave to an electrodeless bulb. In addition, the electrodeless lighting apparatus has longer life span than that of an incandescent lamp or a fluorescent lamp, and has superior lighting effect.
FIG. 1
is a longitudinal cross-sectional view showing an electrodeless lighting apparatus according to the conventional art.
As shown therein, the conventional electrodeless lighting apparatus comprises: a case
10
; a high voltage generator
20
installed in the case
10
for generating high voltage; a magnetron
30
installed in the case
10
apart a certain distance from the high voltage generator
20
for generating microwave using the high voltage generated in the high voltage generator
20
; a waveguide
40
for guiding the microwave generated in the magnetron
30
; an electrodeless bulb
60
protruded in front of the waveguide
40
for emitting light as a material filled in the bulb
60
becomes plasma by the microwave energy; and a mesh screen
50
covered on front side of the bulb
60
for blocking the microwave and passing the light emitted from the bulb
60
.
Also, the lighting apparatus comprises: a mirror
70
installed on an outlet portion of the waveguide
40
for reflecting the light generated in the bulb
60
to frontward; and a reflector
80
installed on outer side of the case
10
for reflecting the light generated in the bulb
60
.
On the other hand, the case
10
includes a bulb motor
90
for rotating the bulb
60
, and a bulb shaft
91
for connecting the bulb motor
90
to the bulb
60
. Also, a cooling fan
100
for releasing heat generated in the high voltage generator
20
and in the magnetron
30
and a fan motor
101
for driving the cooling fan
100
are installed in the case
10
. In addition, an air guide
110
for guiding an air flow generated by the cooling fan
100
to the high voltage generator
20
and to the magnetron
30
is included in the case
10
.
An operation of the electrodeless lighting apparatus according to the conventional art constructed as above will be described as follows.
When an electric source is applied to the high voltage generator
20
, the magnetron
30
generates microwave by the high voltage generated in the high voltage generator
20
. The microwave generated in the magnetron
30
is transmitted into the mesh screen
50
through the waveguide
40
to discharge the material filled in the bulb
60
, and thereby plasma is generated.
The light emitted by generating plasma in the bulb
60
is reflected on the mirror
70
and the reflector
80
and radiated to frontward.
At the same time, the bulb motor
90
is operated to rotate the bulb
60
, and accordingly, the bulb
60
is cooled down. In addition, the bulb motor
90
is operated to rotate the cooling fan
100
, and accordingly, outer air is induced through the air guide
110
to cool down the high voltage generator
20
and the magnetron
30
.
On the other hand, as shown in
FIG. 2
, the reflector
80
which reflects the light generated in the bulb
60
comprises a parabola surface portion
81
including an opening hole
83
formed on front surface, and a coupling portion
82
extended from a rear part of the parabola surface portion
81
and coupled to the case
10
.
The reflector
80
is made using a metal material, and a reflection film is coated on an inner surface of the parabola surface portion
81
.
The coupling portion
82
of the reflector
80
is fixedly coupled to the case
10
, and at that time, the bulb
60
and the mesh screen
50
are located inside of the reflector
80
.
In addition, a light guide
120
of long cylinder shape having a diameter corresponding to the diameter of the opening hole
83
of the reflector in order to illuminate outdoor and indoor with the light generated in the bulb
60
is coupled so as to be connected to the opening hole
83
of the reflector
80
. One or more light guide
120
may be coupled.
In the above structure of the lighting apparatus, the light generated in the bulb
60
is reflected on the mirror
70
and the reflector
80
, and then goes to the light guide
120
. And the outdoor or indoor is illuminated as the light reflected on the mirror
70
and the reflector
80
passes through the light guide
120
.
However, according to conventional electrodeless lighting apparatus, the reflector
80
and the light guide
120
should be included in order to illuminate the outdoor or the indoor, and therefore, initial cost is increased. In addition, lengths of the reflector
80
and the light guide
120
are very long, and therefore, it needs a large installation area, and the installation area is limited.
Also, the reflector
80
is formed to have parabola cross section for reflecting the light straightly, and therefore, the reflector
80
is heated by the heat generated from the bulb
60
which is located inside of the reflector
80
. In addition, a life span is reduced by the heat of the reflector
80
.
SUMMARY OF THE INVENTION
Therefore, an object of the present invention is to provide a globe type electrodeless lighting apparatus which is able to illuminate omnidirection with a simple structure.
Another object of the present invention is to provide a globe type electrodeless lighting apparatus which is able to minimize glaring phenomenon and to release the heat generated therein by installing an irregularly reflecting globe around a bulb.
Still another object of the present invention is to provide a globe type electrodeless lighting apparatus which is able to prevent globe from being distorted or being reduced its life span by the heat generated in the bulb.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a globe type electrodeless lighting apparatus comprising: a waveguide for transmitting microwave which is generated in a magnetron; a mesh screen coupled on an outlet portion of the waveguide for blocking a leakage of the microwave and passing the light; a bulb located in the mesh screen for emitting light as generating plasma by the microwave; and a globe installed outer periphery of the mesh screen so that the light generated in the bulb to omnidirections.
Also, the globe is formed using a material having irregularly reflecting characteristic, 50%~95% light permeability, and heat resistance temperature of higher than 100° C.
A location of the bulb and a shape of the globe are decided so that an illuminating angle can be larger than 270° C. centering around the bulb.
The waveguide is fixed on inside of the case, and the globe is fixed on outer side of the case. In addition, the globe of spherical or polyhedral shape comprises a permeation portion through which the light passes, and a mounting portion extended from the permeation portion as a cylindrical shape and coupled to the case.
According to an embodiment of the present invention, the globe may be formed as a sphere or a polyhedron.
According to another embodiment of the present invention, the globe includes a plurality of fine protrusions at least one surface between an inner surface and an outer surface of the globe.
The fine protrusion is formed as a pentahedron or as a hemisphere.
According to still another embodiment of the present invention, a heat blocking member is installed between the bulb and the globe which is close to the bulb so that the heat transmitted from the bulb can be blocked.
The heat blocking member of ring shape comprises a plurality of louvers located between the mesh screen and the globe, and the plurality of louvers are connected to each other using connecting portions.
The louver is formed to have a structure which is gradually e
Bae Young-Jin
Lee Jae-Jin
Park Geun-Young
Lee Guiyoung
LG Electronics Inc.
O'Shea Sandra
LandOfFree
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