Note: Descriptions are shown in the official language in which they were submitted.
CA 02734984 2011-02-22
[DESCRIPTION]
[Invention Title]
LED LIGHTING DEVICE
[Technical Field]
The present invention relates to a lighting device,
and more particularly, to a lighting-emitting diode (LED)
lighting device that prevents a light output and a lifespan
of an LED element from being deteriorated and emits uniform
lighting without glaring and optical attenuation with a
convection dissipation type frame rapidly dissipating heat
by using the LED element as a light source.
[Background Art]
In recent years, the LED element has been in the
spotlight as a light source of diversified lighting devices.
The LED element has advantages such as a lower heat
dissipating amount, lower power consumption, a longer
lifespan, higher impact-resistance, and the like than a
known lighting source. Further, during manufacturing,
since mercury or discharging gas is not used like a
00fluorescent lamp, the LED element has an advantage of not
causing environmental pollution.
In the case in which appropriate power is supplied
and an appropriate heat dissipating unit is provided to the
LED element, although the LED element is used for 0.1
million hours or longer, the LED element can main a lighted
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state without any damage. Optical outputs of all light
sources decrease gradually as time elapses. Since people
cannot tell the difference at 80% of initial light
intensity, the lifespan of the lighting LED element is
presently expected to be approximately 40 to 50 thousand
hours. Therefore, the LED element may be a much longer
lifespan light source than an incandescent lamp having a
lifespan of 1500 hours and the fluorescent lamp having a
lifespan of 10 thousand hours.
However, when a driving current of the LED element
increases in order to acquire a high-luminance, high-power
lighting source, the power loss of the LED element
increases, as a result, most of electric energy is
converted into heat and a junction portion of the LED
element is in a high-temperature state.
Even though a current flowing through the LED
element is uniform, when the temperature of the junction
portion increases, the LED element has characteristics in
that an optical output and optical efficiency thereof
deteriorate and the operating lifespan thereof decreases.
Accordingly, in order to improve lighting
performance and the lighting lifespan, heat generated from
the junction portion of the LED element must be discharged
to the outside as quickly as possible.
In order to solve the problem, in the related art, a
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high-luminance LED element is mounted on a front surface of
an integrated metallic housing in which cooling fins are
formed on the circumference of a main body in diversified
heat dissipating structures and a semicircular ivory
diffusion cover is covered thereon to manufacture an LED
lighting lamp. However, such a scheme has a problem in
that a projection angle of the LED light source, optical
attenuation increases by the ivory white diffusion cover to
decrease illumination and thermal accumulation occurs in
the diffusion cover to easily deteriorate the LED element,
to thereby change a lighting color or shorten the lifespan.
Further, a general bulb type LED lighting lamp has a
problem in that since a DC power supply, a metallic heat
dissipating housing, a high-luminance LED element mounted
on a front surface of the housing, and an ivory white
diffusion cover are integrally joined to each other during
manufacturing, when the illumination of an LED light source
deteriorates, the LED element and the DC power supply
integrally and elaborately mounted on the metallic housing
are very difficult to replace, as a result, the entire
product is generally discarded, thereby producing wastes
and wasting resources.
Further, the LED element is a point light source
emitting light in a semiconductor element and a light
emitting surface of the LED element has a structure to
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collect light on a front surface thereof and dissipating
the collected light by using a small reflection mirror and
an epoxy lens. Accordingly, when the LED element emits
light with high luminance in order to increase illumination,
the light source is very glaring. Therefore, most of LED
lighting lamps are used as the LED lighting lamp by
covering the LED element with an ivory white circular
diffusion cover or covering the LED light source with a
diffused reflection plate made of a translucent material
having an irregular uneven curve in order to prevent
glaring.
The ivory white diffusion cover or irregular uneven
diffused reflection plate reduces the quantity of light of
the LED element to remarkably decrease illumination due to
characteristics of an optical diffusion material and a
diffusion reflection structure. Accordingly, additional
high-luminance LED elements are mounted on a light source
part by considering the reduced quantity of light, as a
result, the amount of emitted heat is also doubled.
Therefore, a heat radiating function must be further
improved to meet the demand. Thus, a manufacturing cost
largely increases and the LED lighting device becomes
expensive.
Meanwhile, convection heat dissipation dissipates
heat generated from the device by using a convection
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phenomenon and the convection heat dissipation represents
that cold air introduced into the bottom of the device is
heated hot by internal heat of the device and thereafter,
discharged to the top by natural convection to prevent the
device from being overheated.
[Discosure]
[Technical Problem]
The present invention is contrived to solve the
problems and an embodiment of the present invention
provides a lamp type LED lighting device that can rapidly
discharges heat generated from an LED element that
influences an optical output and a lifespan of the LED
lighting device through a lamp type frame having a
convection heat dissipation structure in which ventilation
is smooth, and prevent an LED light source from glaring and
widely diffuse a light source without optical attenuation
by using a side reflection member and a diffusion lens and
a diffusion cover.
Another embodiment of the present invention provides
line type and panel type LED lighting devices that can
replace the existing fluorescent lamp and panel type
lighting device by rapidly discharging heat generated from
an LED element that influences an optical output and a
lifespan of the LED lighting device through a frame having
smooth line type and panel type structures in which a heat
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dissipating operation is smooth, and preventing an LED
light source from glaring and widely diffusing a light
source without optical attenuation by optically placing a
curved reflection plate with a diffusion lens and a
diffusion plate and a diffusion window.
[Technical Solution]
An embodiment of the present invention provides a
lamp-shaped LED lighting device including: a housing cover
having a socket fixed at one side thereof; a heat
dissipating frame fixed to the other side of the housing
cover, having at least three side reflecting portions
formed on the outer peripheral surface thereof, and a
ventilation unit having at least one ventilation hole
formed at a portion which the end of the side reflecting
portion contacts; an LED module fixed to the side
reflecting portion of the heat dissipating frame and having
an LED element; a power supply module unit installed in the
heat dissipating frame; a side reflecting member fixed to
the side reflecting portion of the heat dissipating frame
to cover the LED module and having a boring hole formed at
a location corresponding to an emission surface of the LED
element; a frame cover coupled to be attached to and
detached from the bottom of the heat dissipating frame; and
a diffusion cover mounted on the side reflecting portion of
the heat dissipating frame and having a toothed diffusion
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lens serving as refraction and diffusion operations
installed on the inner periphery thereof, wherein at least
one housing hole is formed on the housing cover.
An embodiment of the present invention provides a
lamp-shaped LED lighting device including: a housing cover
having a socket fixed at one side thereof; a power supply
module housing coupled to be attached to and detached from
the other side of the housing cover; a heat dissipating
frame fixed to one side of the power supply module housing,
having at least three side reflecting portions formed on
the outer peripheral surface thereof, and a ventilation
unit having at least one ventilation hole formed at a
portion which the end of the side reflecting portion
contacts; an LED module fixed to the side reflecting
portion of the heat dissipating frame and having an LED
element; a power supply module unit installed in the power
supply module housing; a side reflecting member fixed to
the side reflecting portion of the heat dissipating frame
to cover the LED module and having a boring hole formed at
a location corresponding to an emission surface of the LED
element; a frame cover coupled to be attached to and
detached from the bottom of the heat dissipating frame; and
a diffusion cover mounted on the side reflecting portion of
the heat dissipating frame and having a toothed diffusion
lens serving as refraction and diffusion operations
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installed on the inner periphery thereof, wherein at least
one housing hole is formed on the housing cover.
An embodiment of the present invention provides a
line-shaped LED lighting device including: a base frame
partitioned into an upper space part and a lower space part,
having a bent side wall, and having at least one frame
ventilation hole formed on the side wall; an LED module
installed in the upper space part of the base frame and
having an LED element; a curved reflecting plate in which
the end is supported on the upper space part of the base
frame, a boring hole is formed at a location corresponding
to an emission surface of the LED element, and a diffusion
lens is installed on a straight line with the LED module; a
diffusion plate fixed to the top of the base frame; a side
cover coupled to the side of the base frame and connecting
a power to the LED module; and a power supply module unit
coupled to the side cover to supply the power to the LED
module, wherein a toothed diffusion lens performing
refraction and diffusion operations is installed on the
diffusion plate.
An embodiment of the present invention provides a
panel-shaped LED lighting device including: a heat
dissipating plate in which recessed portions and projected
portions are continuously formed and light source mounting
grooves are formed in the projected portions; a power
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supply controller installed on the heat dissipating plate;
an LED module mounted in the light source mounting groove
of the heat dissipating plate and electrically connected to
the power supply controller to flicker by a control from
the power supply controller; a reflecting plate in which
curved reflecting portions coupled to a front surface of
the heat dissipating plate and having a downward
semicircular cross section are continuously formed and a
boring hole is formed on the bottom of the curved
reflecting portion; a semicircular diffusion lens installed
on the front bottom of the curved reflecting portion to
cover the boring hole of the curved reflecting portion; and
a diffusion plate coupled to the front surface of the
reflecting plate to cover the front surface of the
reflecting plate.
[Effect of Invention]
An embodiment of the present invention can provide a
lamp type LED lighting device that can rapidly discharges
heat generated from an LED element that influences an
optical output and a lifespan of the LED lighting device
through a lamp type frame having a convection heat
dissipation structure in which ventilation is smooth, and
prevent an LED light source from glaring and widely diffuse
a light source without optical attenuation by using a side
reflection member and a diffusion lens and a diffusion
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cover.
Another embodiment of the present invention can
provide line type and panel type LED lighting devices that
can replace the existing fluorescent lamp and panel type
lighting device by rapidly discharging heat generated from
an LED element that influences an optical output and a
lifespan of the LED lighting device through a frame having
smooth line type and panel type structures in which a heat
dissipating operation is smooth, and preventing an LED
light source from glaring and widely diffusing a light
source without optical attenuation by optically placing a
curved reflection plate with a diffusion lens and a
diffusion plate and a diffusion window.
[Description of Drawings]
FIG. 1 is a perspective view of a lamp-shaped LED
lighting device according to an embodiment of the present
invention;
FIG. 2 is an exploded perspective view of the lamp-
shaped LED lighting device shown in FIG. 1;
FIG. 3 is a cross-sectional view take along line m-m
shown in FIG. 1;
FIG. 4 is a modified cross-sectional view of a heat
dissipating frame adopted in the lamp-shaped LED lighting
device shown in FIG. 1;
FIG. 5 is a perspective view of an LED module
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adopted in the lamp-shaped LED lighting device shown in FIG.
1;
FIG. 6 is a bottom view of a frame cover adopted in
the lamp-shaped LED lighting device shown in FIG. 1;
FIG. 7 is a block diagram of an optical sensor and a
power supply module and an LED module and a control unit
adopted in the lamp-shaped LED lighting device shown in FIG.
1;
FIGS. 8 to 10 are usage state diagrams of the lamp-
shaped LED lighting device shown in FIG. 1;
FIG. 11 is a perspective view showing a state in
which a diffusion cover is coupled to the lamp-shaped LED
lighting device shown in FIG. 1;
FIG. 12 is a usage state diagram of the state in
which the diffusion cover is coupled to the lamp-shaped LED
lighting device shown in FIG. 1;
FIG. 13 is a front view of a lamp-shaped LED
lighting device according to another embodiment of the
present invention;
FIG. 14 is a cross-sectional view take along line
XII-XII shown in FIG. 13;
FIG. 15 is a perspective view of a line-shaped LED
lighting device according to an embodiment of the present
invention;
FIG. 16 is an exploded perspective view of the line-
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shaped LED lighting device shown in FIG. 15;
FIG. 17 is a cross-sectional view taken along line
III-III of FIG. 15;
FIG. 18 is a perspective view of an LED module
adopted in the line-shaped LED lighting device shown in FIG.
15;
FIG. 19 is a plan view showing a state in which a
diffusion lens of a curved reflecting plate and a diffusion
plate and a diffusion window and a power supply module unit
from the line-shaped LED lighting device shown in FIG. 15;
FIG. 20 is a front cross-sectional view showing
diffusion and refraction operations of the line-shaped LED
lighting device shown in FIG. 15;
FIGS. 21 to 22 are usage state diagrams of the line-
shaped LED lighting device shown in FIG. 15;
FIG. 23 is a perspective view of a panel-shaped LED
lighting device according to the present invention;
FIG. 24 is a side view of a panel-shaped LED
lighting device according to the present invention;
FIG. 25 is an exploded perspective view of a panel-
shaped LED lighting device according to the present
invention;
FIG. 26 is a perspective view of an LED module in
the panel-shaped LED lighting device according to the
present invention;
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FIG. 27 is a plan view of a reflecting plate in the
panel-shaped LED lighting device according to the present
invention;
FIG. 28 is a diagram showing light diffusion of an
LED light source in the panel-shaped LED lighting device
according to the present invention; and
FIG. 29 is a schematic structural diagram of a large
surface lighting device implemented by connecting four
panel-shaped LED lighting devices according to the present
invention in a horizontal direction and a vertical
direction.
[Best Mode]
An embodiment of the present invention provides a
lamp-shaped LED lighting device including: a housing cover
having a socket fixed at one side thereof; a heat
dissipating frame fixed to the other side of the housing
cover, having at least three side reflecting portions
formed on the outer peripheral surface thereof, and a
ventilation unit having at least one ventilation hole
formed at a portion which the end of the side reflecting
portion contacts; an LED module fixed to the side
reflecting portion of the heat dissipating frame and having
an LED element; a power supply module unit installed in the
heat dissipating frame; a side reflecting member fixed to
the side reflecting portion of the heat dissipating frame
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to cover the LED module and having a boring hole formed at
a location corresponding to an emission surface of the LED
element; a frame cover coupled to be attached to and
detached from the bottom of the heat dissipating frame; and
a diffusion cover mounted on the side reflecting portion of
the heat dissipating frame and having a toothed diffusion
lens serving as refraction and diffusion operations
installed on the inner periphery thereof, wherein at least
one housing hole is formed on the housing cover.
An embodiment of the present invention provides a
lamp-shaped LED lighting device including: a housing cover
having a socket fixed at one side thereof; a power supply
module housing coupled to be attached to and detached from
the other side of the housing cover; a heat dissipating
frame fixed to one side of the power supply module housing,
having at least three side reflecting portions formed on
the outer peripheral surface thereof, and a ventilation
unit having at least one ventilation hole formed at a
portion which the end of the side reflecting portion
contacts; an LED module fixed to the side reflecting
portion of the heat dissipating frame and having an LED
element; a power supply module unit installed in the power
supply module housing; a side reflecting member fixed to
the side reflecting portion of the heat dissipating frame
to cover the LED module and having a boring hole formed at
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a location corresponding to an emission surface of the LED
element; a frame cover coupled to be attached to and
detached from the bottom of the heat dissipating frame; and
a diffusion cover mounted on the side reflecting portion of
the heat dissipating frame and having a toothed diffusion
lens serving as refraction and diffusion operations
installed on the inner periphery thereof, wherein at least
one housing hole is formed on the housing cover.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which an optical sensor
is installed at one side of the frame cover.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which a diffusion lens
diffusing a light source emitted from the LED module is
installed in the side reflecting member.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which a control unit
controlling illumination of the LED module is installed in
the power supply module unit.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which a prism is formed
in the diffusion lens of the side reflecting member.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which at least one frame
cover hole is formed in the frame cover.
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The embodiment of the present invention provides the
lamp-shaped LED lighting device in which the toothed
diffusion lens of the diffusion cover is formed by a
Fresnel lens.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which the side
reflecting member is plated with chrome or nickel.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which a dome-shaped
reflecting mirror is installed at the center of the frame
cover and an LED lamp is installed in the reflecting mirror.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which the LED module is
replaceable by the side reflecting member and the frame
cover separated from the heat dissipating frame.
An embodiment of the present invention provides a
line-shaped LED lighting device including: a base frame
partitioned into an upper space part and a lower space part,
having a bent side wall, and having at least one frame
ventilation hole formed on the side wall; an LED module
installed in the upper space part of the base frame and
having an LED element; a curved reflecting plate in which
the end is supported on the upper space part of the base
frame, a boring hole is formed at a location corresponding
to an emission surface of the LED element, and a diffusion
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lens is installed on a straight line with the LED module; a
diffusion plate fixed to the top of the base frame; a side
cover coupled to the side of the base frame and connecting
a power to the LED module; and a power supply module unit
coupled to the side cover to supply the power to the LED
module, wherein a toothed diffusion lens performing
refraction and diffusion operations is installed on the
diffusion plate.
The embodiment of the present invention provides the
line-shaped LED lighting device further including a
diffusion window fixed to the top of the base frame to
cover the diffusion plate.
The embodiment of the present invention provides the
line-shaped LED lighting device further including a frame
supporting unit coupled to be attached to and detached from
the base frame and having at least one heat dissipating pin
and a ventilation hole formed on the side wall.
The embodiment of the present invention provides the
line-shaped LED lighting device in which an optical sensor
and a control unit are installed in the power supply module
unit and the control unit is connected with the power
supply module unit and the optical sensor to automatically
control illumination of the LED module.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which a prism is formed
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in the diffusion lens of the curved reflecting plate.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which a lenticular lens
is installed in the diffusion window.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which a diffusion prism
is further installed in the diffusion plate.
The embodiment of the present invention provides the
lamp-shaped LED lighting device in which the curved
reflecting plate is plated with chrome or nickel.
An embodiment of the present invention provides a
panel-shaped LED lighting device including: a heat
dissipating plate in which recessed portions and projected
portions are continuously formed and light source mounting
grooves are formed in the projected portions; a power
supply controller installed on the heat dissipating plate;
an LED module mounted in the light source mounting groove
of the heat dissipating plate and electrically connected to
the power supply controller to flicker by a control from
the power supply controller; a reflecting plate in which
curved reflecting portions coupled to a front surface of
the heat dissipating plate and having a downward
semicircular cross section are continuously formed and a
boring hole is formed on the bottom of the curved
reflecting portion; a semicircular diffusion lens installed
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on the front bottom of the curved reflecting portion to
cover the boring hole of the curved reflecting portion; and
a diffusion plate coupled to the front surface of the
reflecting plate to cover the front surface of the
reflecting plate.
The embodiment of the present invention provides the
panel-shaped LED lighting device further including
connectors provided on sides of the heat dissipating plate,
which enable extension to a large surface lighting device
through power supply connection and interconnections of the
LED lighting devices by being electrically connected to the
power supply controllers.
The embodiment of the present invention provides the
panel-shaped LED lighting device in which in the LED module,
a plurality of LED elements are spaced apart from each
other on a bar-type printed circuit board and connection
terminals for electrically connecting the power supply
controller are provided at one side thereof.
The embodiment of the present invention provides the
panel-shaped LED lighting device in which the LED module is
replaceably mounted in the light source mounting groove.
The embodiment of the present invention provides the
panel-shaped LED lighting device in which boring holes are
formed at only locations of the curved reflecting portion
of the reflecting plate corresponding to the LED elements
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so that only light sources of the LED elements arranged in
the LED module are projected onto the reflecting plate and
the boring holes of the reflecting plate are supported in
contact with the periphery of the emission surface of the
LED element at the time of coupling the reflecting plate.
The embodiment of the present invention provides the
panel-shaped LED lighting device in which the reflecting
plate is manufactured by forming a metal plate so that the
curved reflecting portions are continuously formed and
plating the surface thereof with chrome or nickel.
The embodiment of the present invention provides the
panel-shaped LED lighting device in which an inverted
triangular lens surface having a prism shape performing a
full-reflection operation is formed on the inner surface of
the semicircular diffusion lens.
The embodiment of the present invention provides the
panel-shaped LED lighting device in which a prism -type
toothed diffusion lens is formed on the bottom of the
diffusion plate corresponding to the LED module.
The embodiment of the present invention provides the
panel-shaped LED lighting device in which as the panel-
shaped LED lighting device is formed in a square shape and
the connectors are provided at the centers of the sides one
at a time, grid-shaped power supply circuits are
implemented between the power supply controller and the
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connectors at the center and in the case where the panel-
shaped LED lighting devices are connected to each other in
horizontal and vertical directions by using the connectors
to extend to the large surface lighting device, a general
net type power supply circuit is implemented by power
supply circuits.
[Mode for Invention]
A lamp type LED lighting device according to an
embodiment of the present invention includes a housing
cover 10, a heat dissipating frame 20, an LED module 30, a
power supply module unit 40, a side reflecting member 50, a
frame cover 60, a light sensor 70, and a control unit 80 as
shown in FIGS. 1 to 14.
The housing cover 10 preferably has a disk shape and
includes a housing 11, having at least one housing hole lla
and a socket 12 fixed to the top of the housing 11 and
connected with an external power supply as shown in FIGS. 1
and 2.
The housing hole lla serves as a movement passage of
air that allows heat generated from the LED module 30 to be
described later to be discharged and cooled by air. The
socket 12 includes a positive electrode connection terminal
12a and a negative electrode connection terminal 12b to
supply a power to the power supply module unit 40 to be
described later as shown in FIG. 2.
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The heat dissipating frame 20 includes a frame body
21 that is hollow and preferably has a radial shape to make
convection heat dissipation smooth, at least three side
reflecting units 22 formed outside the frame body 21, and a
ventilation unit 23 formed at a portion where the end of
the side reflecting unit 22 contacts as shown in FIGS. 2
and 3.
Inside the frame body 21, a power supply module
fixing groove 21a which the power supply module unit 40 to
be described later slides to be inserted into and fixed to
is formed as shown in FIG. 3 and outside of the frame body
21, a ground hole 21b which the LED connection terminal 34
of the LED module 30 to be described later is inserted into
and fixed to is formed as shown in FIG. 2. The ground hole
21b is connected with the power supply module unit 40 to be
described later. Since an inner part of the frame body 21
is hollow, the inner part serves as a movement passage of
air (see FIG. 9) to cool heat generated from the LED module
30 to be described later. The frame body 21 can be
transformed to various types of polygonal shapes on the
basis of the shape of FIG. 3 as shown in FIG. 4.
The side reflecting unit 22 is a location where the
side reflecting member 50 is installed as shown in FIG. 3
and the end of the side reflecting unit 22 is preferably
bent to support the side reflecting member 50.
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The ventilation unit 23 allows heat generated from
the power supply module unit 40 and the LED module 30 to be
described later to be rapidly discharged to the outside and
at least one ventilation hole 23a is preferably formed in
the ventilation unit 23 as shown in FIG. 2.
The LED module 30 is preferably installed outside
the heat dissipating frame 20 as shown in FIG. 2 and
connected with the power supply module unit 40 to be
described later to emit an LED light source. The LED
module 30 includes a module base 31, at least one LED
element 32 fixed to one side of the module base 31 and
having an LED emission surface 32a, a resistor 33 installed
between the LED elements 32, and an LED connection terminal
34 installed at one side of the module base 31 and inserted
into the ground hole 2lb of the heat dissipating frame 20
as shown in FIG. 5.
On the LED emission surface 32a of the LED element
32, the periphery of the boring hole 51a of the side
reflecting member 50 to be described later is preferably
supported to allow heat accumulated on the LED emission
surface 32a to be absorbed in the side reflecting member 50
as shown in FIG. 3.
The power supply module unit 40 includes a power
supply module PCB 41 sliding-inserted into a power supply
module fixing groove 21a of the heat dissipating frame 20
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and a power supply module 42 fixed to the power supply
module PCB 41 and converting AC power applied through the
socket 12 as shown in FIG. 3.
The side reflecting member 50 is mounted on the side
reflecting unit 22 of the heat dissipating frame 20 to
diffuse and refract the light source emitted from the LED
module 30 as shown in FIGS. 2 and 3. The side reflecting
member 50 includes a base plate 51 fixed to both ends of
the side reflecting member 22 and having at least one
boring hole 51a formed at a location thereof corresponding
to the LED element 32 and a diffusion lens 52 installed in
the base plate 51 to be positioned on a straight line with
the LED element 32 as shown in FIG. 3.
The periphery of the boring hole 51a of the base
plate 51 is preferably supported on the LED emission
surface 32a to absorb heat accumulated on the LED emission
surface 32a as described above.
A prism 52a is formed in the diffusion lens 52 to
full-reflect (see FIG. 9) the light source generated from
the LED module 30 as shown in FIG. 3. The full-reflection
represents a phenomenon in which when light is progressed
from a material having optically large refractivity to a
material having optically small refractivity, light
incident at an incident angle larger than a predetermined
threshold angle is not refracted but fully reflected and
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the minimum value of the incident angle at which the full-
reflection may occur is referred to as the threshold angle.
For example, a threshold angle at which light is progressed
from glass to air is 42 degrees and if the incident angle
is larger than 42 degrees, light cannot transmit the glass
and is fully reflected on the inner surface of the glass
not to be progressed to air. The phenomenon is referred to
as the full-reflection and the full-reflection prism 52a
uses such a property.
The side end of the side reflecting member 50 is
supported on the end of the side reflecting unit 22 as
shown in FIG. 3 and the top thereof is supported on the
bottom of the housing 11 as shown in FIG. 2. The bottom of
the side reflecting member 50 is supported on the frame
cover 60 to be described later as shown in FIG. 1. That is,
the side reflecting member 50 can be separated by attaching
and detaching the frame cover 60, and as a result, the LED
module 30 having reduced illumination can be easily
replaced.
The surface of the side reflecting member 50 is
preferably plated with chrome or nickel in order to improve
reflection and diffusion efficiencies.
The frame cover 60 is coupled to be attached to and
detached from the bottom of the heat dissipating frame 20
as shown in FIG. 2, and as a result, the LED module 30 and
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the power supply module unit 40 can be easily replaced. At
least one frame cover hole 61 is formed in the frame cover
60 as shown in FIGS. 2 and 6, a dome-shaped reflecting
mirror 62 is installed at the center of the frame cover 60,
and a circular LED lamp 63 connected with the power supply
module unit 40 is coupled to the reflecting mirror 62.
The optical sensor 70 is preferably installed on the
bottom of the frame cover 60 as shown in FIG. 6 and senses
the amount of surrounding light and transfers a signal to
the control unit 80 installed in the power supply module
unit 40. The control unit 80 controls the illumination of
the LED module 30 by the signal transferred from the
optical sensor 70 as shown in FIG. 7. Since the above-
mentioned controlling method employs the related art, a
detailed description thereof will be omitted.
FIG. 8 is a diagram showing a usage state of the
lamp-shaped LED lighting device shown in FIG. 1. In detail,
FIG. 8 shows a usage state of a lamp-shaped LED lighting
device used in a ceiling mounted type.
The light source generated from the LED module 30 is
diffused to surrounding areas by the diffusion lens 52 as
shown in FIG. 9 and some light sources are full-reflected
by the prism 52a. The full-reflected or diffused light
source forms multiple reflections by a reflection surface
of a ceiling mounted lamp device buried in a ceiling, and
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the like and is irradiated to the outside to become soft
downlight lighting as shown in FIG. 8.
In this case, heat generated from the LED module 30
is cooled by external air inputted through the frame cover
hole 61 formed in the frame cover 60 and is rapidly
discharged to the outside through the ventilation hole 23a
formed in the ventilation unit 23 as shown in FIG. 10.
Furthermore, since the periphery of the boring hole 51a of
the base plate 51 is supported on the LED emission surface
32a of the LED element 32, the heat accumulated on the LED
emission surface 32a is transferred to the base plate 51 on
the periphery of the boring hole 51a to acquire a cooling
effect.
FIG. 11 is a perspective view showing a state in
which a diffusion cover is coupled to the lamp type LED
lighting device shown in FIG. 1 and FIG. 12 is a usage
state diagram showing a state in which the diffusion cover
is coupled to the lamp type LED lighting device shown in
FIG. 1.
The diffusion cover 90 is preferably fitted in a
protrusion formed in the heat dissipating frame 20 as shown
in FIGS. 11 and 12 and the diffusion cover 90 is used when
the lamp type LED lighting device according to the
embodiment of the present invention is not mounted on the
ceiling lighting device, but is exposed to the outside as
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an independent lighting lamp.
A toothed diffusion lens 90a opposed to the side
reflecting member 50 and having a full-reflection
characteristic is installed inside the diffusion cover 90
as shown in FIG. 12. The toothed diffusion lens 90a allows
diffused light of the LED light source to be reflected in a
semicircular form by mutual reflection operations with the
side reflecting member 50. The toothed diffusion lens 90a
is preferably manufactured by a Fresnel lens type lens
processing method for efficient refraction and diffusion
operations.
FIG. 13 is a front view of a lamp-shaped LED
lighting device according to another embodiment of the
present invention and FIG. 14 is a cross-sectional view
taken along line XH-XH shown in FIG. 13.
The lamp-shaped LED lighting device 100 according to
another embodiment of the present invention includes a
housing cover 110, a power supply module housing 120, a
heat dissipating frame 20, an LED module 30, a power supply
module unit 40, a side reflecting member 50, a frame cover
60, an optical sensor 70, a control unit 80, and a
diffusion cover 90. Herein, the same reference numerals in
the figures shown in above refer to the same members having
the same function.
The housing cover 110 is coupled to be attach to and
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detached from the power supply module housing 120 to be
described later as shown in FIG. 13 and preferably has a
semicircular shape and includes a housing 111 having at
least one housing hole llla and a socket 112 fixed to the
top of the housing 111 and connected with an external power
supply.
The housing hole 11a serves as a movement passage of
air that allows heat generated from the LED module 30 to be
described later to be cooled by air. The socket 112
includes a positive electrode connection terminal 112a and
a negative electrode connection terminal 112b as shown in
FIG. 13 to supply a power to the power supply module unit
40.
The power supply module housing 120 is coupled to be
attached to or detached from the bottom of the housing
cover 110 and the power supply module unit 40 is installed
inside the power supply module housing 120 to be separated.
The power supply module unit 40 is installed in the power
supply module housing 120 in the same method as the
installation method in the heat dissipating frame 20.
At least one of the module housing holes 120a
serving as an intake passage of air is formed in the power
supply module housing 120 to rapidly cool heat generated
from the LED module 30 and the power supply module unit 40
by air circulation.
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A line-shaped LED lighting device 200 according to
an embodiment of the present invention includes a base
frame 210, an LED module 220, a curved reflecting plate 230,
a diffusion plate 240, a diffusion window 250, a side cover
260, a power supply module unit 270, an optical sensor 280,
a frame supporting unit 290, and a control unit (not shown)
as shown in FIGS. 15 to 22.
The base frame 210 includes a frame body 211 that is
partitioned into an upper space part 211a and a lower space
part 211b and has a bent side wall, at least one frame
ventilation hole 212 formed on the side wall of the frame
body 211, a supporting protrusion 213 formed on the top of
the frame body 211 and supporting the curved reflecting
plate 230 and the diffusion plate 240 to be described later,
and a diffusion window supporting groove 214 formed on the
top of the frame body 211 and fixing the diffusion window
250 to be described later as shown in FIGS. 16 and 17.
Further, a power supply connecting unit 215 in which
a projection-type connection terminal 215a is formed at one
side and an insertion-type connection terminal (not shown)
is formed at the other side is installed in the lower space
part 211b of the base frame 210 as shown in FIG. 17. The
projection-type connection terminal 215a is connected to
the power supply module unit 270 to be described later to
connect a power supply to the LED module 220 as shown in
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FIG. 15. The insertion-type connection terminal is used
when two line-shaped LED lighting devices 200 according to
the embodiment of the present invention are connected to
each other (see FIG. 22).
The LED module 220 is installed in the upper space
part 211a of the frame body 211 as shown in FIG. 17 and
connected to the power supply module unit 270 to be
described later to emit the LED light source. The LED
module 220 includes a module base 221 installed on the
bottom of the upper space part 211a of the frame body 211,
at least one LED element 222 fixed to one side of the
module base 221 and having an LED emission surface 222a, a
resistor 223 installed between the LED elements 222, and an
LED connection terminal 224 installed at one side of the
module base 221, which an LED power supply connection
terminal 261 and a common terminal 262 of the side cover
260 are inserted into and fixed to.
On the LED emission surface 222a of the LED element
222, the periphery of the boring hole 231a of the side
reflecting member 230 to be described later is preferably
supported to allow heat accumulated on the LED emission
surface 222a to be absorbed in the side reflecting member
230 as shown in FIG. 19.
The curved reflecting plate 230 is installed in the
upper space part 211a of the base frame 210 to diffuse and
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refract a light source emitted from the LED module 220 as
shown in FIGS. 16 and 17. The curved reflecting plate 230
includes a base plate 231 of which both ends are supported
on the supporting protrusion 213 of the base frame 210 and
where at least one boring hole 231a is formed at a location
thereof corresponding to the LED element 222 and a
diffusion lens 232 installed in the base plate 231 to be
positioned on a straight line with the LED element 222 as
shown in FIG. 17.
The periphery of the boring hole 231a of the base
plate 231 is preferably supported on the LED emission
surface 222a to absorb heat accumulated on the LED emission
surface 222a as shown in FIG. 19. A light source emitted
from the top of the LED element 222 is absorbed in
constituent components of the LED module 220 or the base
frame 210 to prevent light from being attenuated. Further,
heat emitted from the top of the LED element 222 can be
rapidly discharged through the bottom of the curved
reflecting plate 230 supported on the periphery of each LED
emission surface 222a.
A prism 232a is formed in the diffusion lens 232 to
full-reflect the light source generated from the LED module
220 as shown in FIG. 17. The full-reflection represents a
phenomenon in which when light is progressed from a
material having optically large refractivity to a material
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having optically small refractivity, light incident at an
incident angle larger than a predetermined threshold angle
is not refracted but fully reflected and the minimum value
of the incident angle at which the full-reflection may
occur is referred to as the threshold angle. For example,
a threshold angle at which light is progressed from glass
to air is 42 degrees and if the incident angle is larger
than 42 degrees, light cannot transmit the glass and is
fully reflected on the inner surface of the glass not to be
progressed to air. The phenomenon is referred to as the
full-reflection and the full-reflection prism 232a uses
such a property.
The surface of the curved reflecting member 230 is
preferably plated with chrome or nickel in order to improve
reflection and diffusion efficiencies.
The end of the diffusion plate 240 is supported on
the supporting protrusion 213 of the base frame 210 and a
toothed lens 241 and a diffusion prism 242 are formed on a
surface the diffusion plate 240 opposed the diffusion lens
232 in order to improve reflection and diffusion
efficiencies as shown in FIG. 17.
It is preferable to insert a color sheet (not shown)
between the diffusion plate 240 and the diffusion window
250 to be described later to express soft color lighting
depending on a lighting usage.
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The diffusion window 250 is preferably fixed to a
diffusion window supporting groove 214 of the base frame
210 by a diffusion window supporting protrusion 250b and a
lenticular lens 250a in which a plurality of piano-convex
lenses are arranged in parallel is installed on the inner
bottom of the diffusion window 250 as shown in FIG. 17.
The lenticular lens 250a allows refraction and reflection
to be more variously made in the diffusion window 250 to
implement an efficient diffusion operation. It is
preferable that an ivory white diffusion material is
included in the diffusion window 250 in order to acquire
softer lighting.
The diffusion window 250 may be selectively used
depending on a lighting usage. That is, the diffusion
window 250 is removed and only the diffusion plate 240 may
be used depending on a usage of the lighting device. In
this case, the diffusion plate 240 is preferably coupled to
the supporting protrusion 213 of the base frame 210 by
using a screw or an appropriate supporting member in order
to improve fixity.
The side cover 260 is preferably screwed or fitted
in the side of the base frame 210 to be attached and
detached as shown in FIG. 16. The LED power supply
connection terminal 261 and the common terminal 262 are
mounted on the inner part of the side cover 260 and
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terminal holes 263 connected with the LED power supply
connection terminal 261 and the common terminal 262 are
formed in the inner part of the side cover 260.
The side cover 260 serves to connect a power
inputted from the power supply module unit 270 to be
described later to the LED module 220. In detail, the
power inputted from the power supply module unit 270 is
connected to the terminal hole 263 of the side cover 260 by
the projection-type connection terminal 215a of the base
frame 210. The terminal hole 263 is connected to the LED
power supply connection terminal 261 and the common
terminal 262 and since the LED power supply connection
terminal 261 and the common terminal 262 are inserted into
and fixed to the LED connection terminal 224 of the LED
module 220, the power inputted from the power supply module
unit 270 is supplied to the LED module 220.
As described above, in the line-shaped LED lighting
device 200 according to the embodiment of the present
invention, since a plurality of LED lighting devices can be
connected to each other in series without additional
connection wires by using a power connection method through
the side cover 260, the lighting device can easily and
simply established.
Further, in the line-shaped LED lighting device 200
according to the embodiment of the present invention, when
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the illumination deteriorates, the LED module 220 can be
easily replaced by separating the side cover 260 from the
base frame 210. As a result, the line-shaped LED lighting
device 200 according to the embodiment of the present
invention is used semipermanently, to thereby mitigate the
dissipation of resources and contribute to environmental
protection.
The power supply module unit 270 includes a power
supply module housing 271 fixed to the LED power supply
connection terminal 261 of the side cover 260, an AC inlet
272 installed at one side of the power supply module
housing 271 and allowing an external power to be introduced,
and a power supply module (not shown) converting the
applied AC power as shown in FIGS. 15 to 17.
The optical sensor 280 is installed at one side of
the power supply module unit 270 as shown in FIG. 15 and
senses the amount of surrounding light to transfer a signal
to a control unit (not shown) installed in the power supply
module unit 270. The control unit controls the
illumination of the LED module 220 by using the signal
transferred from the optical sensor 280. Since the above-
mentioned controlling method employs the related art, a
detailed description thereof will be omitted.
The frame supporting unit 290 includes a frame
supporting body 291 coupled to be attach to and detached
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from the bottom of the base frame 210, at least one heat
dissipating pin 292 fixed to the side of the frame
supporting body 291, and at least one ventilation hole 293
formed on the side of the frame supporting body 291 to
communicated with the frame ventilation hole 212 of the
base frame 210 as shown in FIGS. 15 and 16.
The heat dissipating pin 292 discharges heat
generated by the LED element 222 and accumulated in the
base frame 210 to the outside. Further, the heat generated
from the LED element 222 passes through the lower space
part 211b which is a lower heat dissipating space of the
base frame 210 and is easily discharged to the outside
through the frame ventilation hole 212 and the ventilation
hole 293 of the frame supporting unit 290 by ventilation.
As a result, the heat of the LED element 222 may be
discharged more rapidly than that of the known LED lighting
device.
Further, since the frame supporting unit 290
supports the base frame 210, the base frame 210 may be
manufactured more simply and economically and the frame
supporting unit 290 may be efficiently used as a mounting
stand at the time of installing or connecting the lighting
device.
FIG. 20 is a front cross-sectional view showing
diffusion and refraction operations of the line-shaped LED
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lighting device shown in FIG. 15.
The light source generated from the LED module 220
is diffused to surrounding areas by the diffusion lens 232
as shown in FIG. 20 and some light sources are full-
reflected by the prism 232a. The full-reflected or
diffused light source forms semicircular reflection by the
base plate 231 of the curved reflecting plate 230. The
semicircular light source is refracted and reflected more
variously by the lenticular lens 250a of the diffusion
window 250 to be discharged to the outside.
In this case, the heat generated from the LED
element 220 passes through the lower space part 211b which
is the lower heat dissipating space of the base frame 210
and is rapidly discharged to the outside through the frame
ventilation hole 212 and the ventilation hole 293 of the
frame supporting unit 290. Furthermore, since the
periphery of the boring hole 231a of the base plate 231 is
supported on the LED emission surface 222a of the LED
element 222, the heat accumulated on the LED emission
surface 222a is transferred to the base plate 231 on the
periphery of the boring hole 231a to acquire a cooling
effect.
FIGS. 21 to 22 are usage state diagrams of the line-
shaped LED lighting device shown in FIG. 15.
FIG. 21 shows a high-luminance lighting device by
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mounting four line-shaped LED lighting devices 200
according to an embodiment of the present invention on one
power supply module unit 270. As described above, in the
case of the line-shaped LED lighting devices 200 according
to the embodiment of the present invention, it is possible
to acquire a desired light amount by connecting one or more
line-shaped LED lighting devices 200 to one power supply
module unit 270 depending on a lighting usage. Further, in
the line-shaped LED lighting device 200 according to the
embodiment of the present invention, when the illumination
deteriorates, the LED module 220 is separated from he power
supply module unit 270 to be easily replaced, the line-
shaped LED lighting device 200 may be used semipermanently.
FIG. 22 is a diagram showing a case in which five
line-shaped LED lighting devices 200 are connected to one
power supply module unit 270 in series and for convenience
of a drawing space, a partial connection section of the
line-shaped LED lighting device 200 is displayed as an
additional power supply connector 295. When the line-
shaped LED lighting device 200 according to the embodiment
of the present invention elongates in a straight direction,
the projection-type connection terminal 215a is connected
to an insertion terminal (not shown) of another adjacent
line-shaped LED lighting device 200, and as a result, an
additional extending power supply connector 295 is not
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required.
The line-shaped LED lighting device 200 according to
the embodiment of the present invention may be used in
various forms by using modifying the method of using the
lighting device shown in FIGS. 21 and 22.
A panel-shaped LED lighting device 300 according to
an embodiment of the present invention rapidly and
effectively discharges heat generated from LED elements 332
at the time when the LED elements 332 constituting an LED
module 330 emit light with high luminance and high power to
increase optical output and optical efficiency, and
remarkably extend the lifespan thereof and effectively
prevent a glaring phenomenon by high-luminance light
emission of the LED elements 332 and widely diffuse the
light of the LED elements 332 without attenuation as shown
in FIGS. 23 to 29. As shown in FIGS. 23 to 27, the panel-
shaped LED lighting device 300 includes heat dissipating
plates 310 in which recessed portions 311 and projected
portions 312 are continuously formed and light source
mounting grooves 313 are formed in the projected portions
312, respectively, power supply controllers 320 installed
on the heat dissipating plates 310, LED modules 330 mounted
on the light source mounting grooves 313 of the heat
dissipating plates 310 and electrically connected to the
power supply controllers 320 to flicker on and off by
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controls from the power supply controllers 320, reflecting
plates 340 in which curved reflecting portions 341 coupled
to front surfaces of the heat dissipating plates 310 and
having downward semicircular cross sections are formed
continuously to correspond to the light source mounting
grooves 313 and the bottoms of the curved reflecting
portions 341 are bored to correspond to the LED modules 330,
semicircular diffusion lenses 350 installed on the front
bottoms of the curved reflecting portions 341 of the
reflecting plates 340 and covering emission surfaces of the
LED modules 330, and diffusion plates 360 coupled to the
front surfaces of the reflecting plates 340 and covering
the front surfaces of the reflecting plates 340.
Herein, the heat dissipating plates 310 form a rear
panel of the panel-shaped LED lighting device 300 according
to the embodiment of the present invention and discharges
heat generated when the LED modules 330 to be described
later emit light with high luminance and high power to the
outside through heat exchange with external air. The heat
dissipating plates 310 are formed by a metal plate so that
the recessed portions 311 and the projected portions 312
are continuously formed to show a good heat dissipating
effect through increment of a heat exchange area.
The light source mounting grooves 313 are formed at
the projected portions 312 of the heat dissipating plates
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310. The light source mounting grooves 313 form mounting
spaces of the LED modules 330 to be described later and
serve to further increase the heat exchange areas of the
heat dissipating plates 310.
The power supply controller 320 is installed at the
recessed portion 311 positioned at the center of the heat
dissipating plate 310. The power supply controller 320
supplies a power introduced from the outside to each LED
module 330 to control flickering of the LED module 330 and
transfer the introduced power to connectors 370a to 370b to
be described later.
The LED module 330 is mounted at the light source
mounting groove 313 of the heat dissipating plate 310. The
LED module 330 serves as a light source in the panel-shaped
LED lighting device 300 according to the embodiment of the
present invention and is electrically connected to the
power supply controller 320 to flicker by the control from
the power supply controller 320.
In the LED module 330, as shown in FIG. 26, a
plurality of LED elements 332 are spaced apart from each
other on a bar-type printed circuit board 331 and
connection terminals 333 for electrically connecting the
power supply controller 320 are provided at one side of the
bar-type printed circuit board 331. Diversified light
emitting circuit elements including resistors are provided
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on the printed circuit board 331 and the LED elements 332
are preferably formed as an LED package that can emit light
with high luminance and the connection terminal 333 is
electrically connected to the power supply controller 320
by an additional power supply connector (not shown) to
receive the power.
In particular, the LED elements 332 that are
generally manufactured by packaging a plurality of LEDs in
order to acquire a high-luminance lighting light source
have a structure to collect light on a front surface and
emit the collected light by using a small reflecting mirror
and an epoxy lens as a part of an optical design to
structurally minimize light loss by opaque components such
as a substrate, an electrode, a heat dissipater, and the
like. The light sources of the LED elements 332 have
various forms of directionalities according to the
structures of the reflecting mirror and the epoxy lens.
The LED module 330 is merely one embodiment of the
LED module 330 used in the LED lighting device 300
according to the embodiment of the present invention and a
specialized manufactured power LED module or an AC LED
module are configured in a bar type to be used according to
the usage or illumination of the LED lighting device.
It is preferable that the LED module 330 is
replaceably mounted in the light source mounting groove 313
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of the heat dissipating plate 310 and this is possible by
attach and detach the connection terminal 333 to and from a
power supply connection connector (not shown), and as a
result, only the LED module 330 having deteriorated
illumination is replaced; however, the rest of the
components of the LED lighting device 300 can be used
semipermanently.
The reflecting plate 340 is coupled to the front
surface of the heat dissipating plate 310. The reflecting
plate 340 serves to reflect the entire light emitted from
all the LED elements 332 of the LED module 330 to the front
side and is formed by a metal plate so that a lower end of
the curved reflecting portion 341 having a downward
semicircular cross section is in close contact with the
light source mounting groove 313.
Further, boring holes 342 corresponding to locations
of the emission surfaces of the LED elements 332,
respectively are formed on the lower end of the curved
reflecting portion 341 so that the light sources of the LED
elements 332 arranged on the LED module 330 are projected
onto the reflecting plates 340. As a result, the light
emitted from the emission surface of the LED element 332 is
absorbed in circuit components of the LED module 330 or the
printed circuit board (PCB) 331, or a part of a frame not
to be attenuated.
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The inner periphery of the reflecting plate 340 is
fitted in an outer portion of the heat dissipating plate
310 so that the boring holes 342 on the lower end of the
reflecting plate 340 is supported in contact with the
periphery of the emission surface of the LED element 332.
As a result, heat discharged to the top of the LED element
332 is rapidly discharged through the bottom of the curved
reflecting portion 341 by the boring holes 342 supported on
the emission surface of the LED element 332 to thereby
increase the optical output and lifespan of the LED element
332.
The reflecting plate 340 is further preferably
manufactured by forming the metal plate so that the curved
reflecting portions 341 are continuously and plating the
surface thereof with chrome or nickel so as to maximize
light reflection efficiency.
The semicircular diffusion lenses 350 are installed
on the front bottom of the curved reflecting portions 341
of the reflecting plate 340, respectively to cover the
emission surface of the LED module 330. The semicircular
diffusion lenses 350 serve to widely diffuse the light of
the LED element 332 passing through the boring hole 342 of
the reflecting plate 340 semicircularly.
An inverted triangular lens surface 351 having a
prism shape is formed on the inner surface of the
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semicircular diffusion lens 350. The inverted triangular
lens surface 351 serves to full-reflect the light of the
LED element 332 to the curved reflecting portion 341 of the
reflecting plate 340 without attenuation by an angle
thereof. In particular, it is more advantageous in wide
diffusion of the light that a part of the light of the LED
element 332 is not progressed straight at the center of the
inverted triangular lens surface 351 but full-reflected to
the curved reflecting portion 341 of the reflecting plate
340 at the side thereof and thereafter, reflected to the
front side by the curved reflecting portion 341 again.
In optics, the full-reflection represents a
phenomenon in which when light is progressed from a
material having optically large refractivity to a material
having optically small refractivity, light incident at an
incident angle larger than a predetermined threshold angle
is not refracted but fully reflected and the minimum value
of the incident angle at which the full-reflection may
occur is referred to as the threshold angle. For example,
a threshold angle at which light is progressed from glass
to air is 42 degrees and if the incident angle is larger
than 42 degrees, light cannot transmit the glass and is
fully reflected on the inner surface of the glass not to be
progressed to air. The phenomenon is referred to as the
full-reflection and the inverted triangular lens surface
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351 of the present invention configures a kind of full-
reflection prism to serve to change a progressing direction
of light.
The diffusion plate 360 is coupled to the front
surface of the reflecting plate 340. The diffusion plate
360 covers the front surface of the reflecting plate 340 to
form a front panel of the panel-shaped LED lighting device
300 according to the embodiment of the present invention.
A toothed diffusion lens 361 in which a plurality of
prisms are continuously formed is formed on the bottom of
the diffusion plate 360 corresponding to the LED module 330.
By using the toothed diffusion lens 361, diffused light
reflected by the curved reflecting portion 341 is further
diffused by mutual reflection operations between the
toothed diffusion lens 361 and the curved reflecting
portion 341, such that high-luminance light is not
attenuated and glaring can be prevented. Side cover
portion 362 covering a side space by the curved reflecting
portion 341 are integrally formed on both surfaces of the
diffusion plate 360.
FIG. 28 is a diagram showing a light diffusion
operation of an LED light source in the panel-shaped LED
lighting device according to the embodiment of the present
invention.
The panel-shaped LED lighting device 300 according
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to the present invention is configured to diffuse high-
luminance light emitted from the LED element 332 without
glaring through multi-stage diffusion operations without
attenuation through a 3D combination of the reflecting
plate 340, the semicircular diffusion lens 350, and the
diffusion plate 360 as shown in FIG. 28 in order to prevent
the high-luminance light glare of the LED element 332 which
is a semiconductor point light source.
To this end, the reflecting plate 340 installed on
the top of the LED element 332 is plated with chrome or
nickel to form the curved reflecting portion 341 having
maximized reflectivity and the semicircular diffusion lens
350 having the inverted triangular lens surface 351 is
mounted on the central upper portion of the curved
reflecting portion 341, such that the light emitted from
the LED element 332 is refracted and diffused through the
semicircular diffusion lens 350 having the inverted
triangular lens surface 351 and projected to the curved
reflecting portion 341 and reflected to the front side and
thereafter, a part of the reflected light is re-reflected
by the toothed diffusion lens 361 of the diffusion plate
360 positioned on the top thereof to diffuse the light more
effectively. Therefore, the light becomes soft
illuminating light of which the glare is prevented.
Connectors 370a to 370d are preferably installed on
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sides of the heat dissipating plate 310, which enable
extension to a large surface lighting device 400 through
power supply connection and interconnections of the panel-
shaped LED lighting devices 300 according to the present
invention by being electrically connected to the power
supply controllers 320. FIG. 29 is a schematic structural
diagram of a large surface lighting device implemented by
connecting four panel-shaped LED lighting devices 300
according to the present invention in horizontal and
vertical directions by using the connectors 370a to 370d.
As shown in FIG. 29, as the panel-shaped LED
lighting device 300 according to the present invention is
formed in a square shape and the connectors 370a to 370d
are provided at the centers of the sides one at a time,
grid-shaped power supply circuits may be implemented
between the power supply controller 320 and the connectors
370a to 370d at the center. In this case, the connectors
370a to 370d on four surfaces are connected to each other
in pairs of the same electrodes by grid-shaped connection
terminals 371.
Further, in the case where the panel-shaped LED
lighting devices 300 according to the present invention are
connected to each other in the horizontal and vertical
directions by using the connectors 370a to 370d to extend
to the large surface lighting device 400, a generally net
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type power supply circuit is implemented by power supply
circuits. Since no potential difference is generated among
the LED lighting devices 300 connected to each other due to
a characteristic of the net type serial/parallel power
supply circuit, even when the large surface lighting device
400 is constructed by extending a large number of panel
type LED lighting devices 300, there is no difference in
illumination on the whole, as a result, it is possible to
achieve uniform lighting.
The panel-shaped LED lighting device 300 according
to the present invention may be used for a ceiling lighting
device in itself by replacing the existing ceiling lighting
lamp and is easily extended in the horizontal and vertical
directions to be used as the large surface lighting device
400.
In this case, it is possible to easily connect the
external power supply at the time of installing the
lighting device through the connectors 370a to 370d and
extend the lighting device in the horizontal and vertical
direction without an additional connection wire by
interconnecting the connectors 370a to 370d even at the
time of constructing the large surface lighting device 400
on a ceiling or a wall.
[Industrial Applicability]
According to an embodiment of the present invention,
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CA 02734984 2011-02-22
it is possible to provide a lamp-shaped LED lighting device
that can prevent an LED light source from being glared and
widely diffuse a light source without optical attenuation
while rapidly discharging heat generated from the top and
bottom of an LED element by a heat dissipating frame and a
side reflecting member and can replace an incandescent
light bulb and a fluorescent lamp.
According to another embodiment of the present
invention, it is possible to provide a line-shaped LED
lighting device that can prevent an LED light source from
being glared and widely diffuse a light source without
optical attenuation while rapidly discharging heat
generated from the top and bottom of an LED element by a
line-shaped structure base frame and a curved reflecting
plate and can replace a line-shaped fluorescent lamp.
According to yet another embodiment of the present
invention, it is possible to provide a line-shaped LED
lighting device that can prevent an LED light source from
being glared and widely diffuse a light source without
optical attenuation while rapidly discharging heat
generated from an LED element through a heat dissipating
plate having a panel-shaped structure which smoothly
dissipates heat, a curved reflecting plate, and a 3D light
diffusion plate and uniformly diffuse a light source
without optical attenuation to prevent a light output from
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CA 02734984 2011-02-22
being reduced and the lifespan from being extended and can
replace a panel-shaped LED lighting device capable of
efficiently a surface lighting device.
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