WO2011052816A1 - Lighting apparatus using light emitting diode - Google Patents

Lighting apparatus using light emitting diode Download PDF

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Publication number
WO2011052816A1
WO2011052816A1 PCT/KR2009/006257 KR2009006257W WO2011052816A1 WO 2011052816 A1 WO2011052816 A1 WO 2011052816A1 KR 2009006257 W KR2009006257 W KR 2009006257W WO 2011052816 A1 WO2011052816 A1 WO 2011052816A1
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WO
WIPO (PCT)
Prior art keywords
light emitting
emitting diode
light
lighting apparatus
emitting diodes
Prior art date
Application number
PCT/KR2009/006257
Other languages
French (fr)
Inventor
Jason Jae Gill
Original Assignee
Amoluxe Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amoluxe Co., Ltd. filed Critical Amoluxe Co., Ltd.
Priority to PCT/KR2009/006257 priority Critical patent/WO2011052816A1/en
Publication of WO2011052816A1 publication Critical patent/WO2011052816A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/02—Fastening of light sources or lamp holders with provision for adjustment, e.g. for focusing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting apparatus using light emitting diodes, particularly a lighting apparatus using light emitting diodes that can be easily designed to have a light distribution type mainly used for outdoor lighting and can be safely used outdoors.
  • a streetlight is a typical lighting apparatus that has been used outdoors, and streetlights are lighting apparatuses installed along streets to ensure safety for traffic and public security and illuminate streets and around the streets, and appropriate streetlights are used according to the installation places, such as a highway, main streets of an urban district, streets of a business district, and streets of residence district.
  • These streetlights generally include a lamp housing that is provided with a reflective plate on the inner side and attached to the electric pole of a streetlight, and a light source that is disposed in the lamp housing and emits light.
  • lampposts there are various types of lampposts, such as a high-way type lamppost with a lamp at a bent end, a bracket type lamppost with a lamp at a transversely branched end, and a lamppost head type with a lamp at the top of a lamppost.
  • a high pressure mercury lamp, a fluorescent lamp, a high pressure sodium lamp, a metal halide lamp and a common electric bulb are used as the light source.
  • the streetlights emit light of white, yellow, or blue, etc., using light sources having predetermined colors. Further, the light sources may be selected according to the power efficiency of the streetlights, light intensities, or the atmosphere.
  • the streetlights are designed such that the light distribution that is radiated on the streets has the most effective shape to light the streets when being installed on the streets, and the light distribution commonly used for lighting the streets is divided into a first light distribution type to a fifth light distribution type, as shown in FIG. 1, in which most streets are effectively lighted by the second, third, and fourth light distribution types, except for some specific cases.
  • Streetlights in the related art light streets with appropriate light distributions that have been implemented in street-lighting design by adjusting the reflective angles of the reflective plates provided on the inner side of the lamp housings.
  • Lighting apparatuses using LEDs (Light Emitting Diode) as the light source have been recently proposed in consideration of the above problems, and with the increase of technology, light emitting diodes that consume small amount of power and emit light with high luminance have been developed and increasingly distributed.
  • LEDs Light Emitting Diode
  • Lighting apparatuses using light emitting diodes generally include a plurality of light emitting diode modules 2 attached to the lower surface of the upper plate 1a of a lamp housing 1 and light a street using reflective plates 1c disposed on the sides 1b of the lamp housing 1.
  • the plurality of light emitting diode modules 2 are attached to the lower surface of the upper plate 1a to ensure a cut-off-angle at which pedestrians or drivers cannot directly see the light sources, that is, the light emitting diode modules 2 within a predetermined range of angle.
  • lighting apparatuses including light emitting diodes should necessarily ensure the cut-off-angle because the light of the light sources may cause an accident by interfering with walking or driving if pedestrians or drivers directly see the light while walking or driving.
  • the light emitting diode has a long life span that can be considered as semi-permanent as compared with lamps used in the related art
  • the luminance is determined by combination of a plurality of light emitting diodes. Therefore, forming light distributions by using reflective plates has a limit in forming light distributions that can effectively light streets, that is, the first to fifth light distributions, as well as, small light distribution areas and luminance.
  • the lighting apparatuses using light emitting diodes provide luminance only by using reflective plates without taking into consideration of ideal arrangement while manufacturing, lighting of streets is inefficient and cannot be commonly used.
  • a lighting apparatus using light emitting diodes which is equipped with a plurality of light emitting diode modules 2 attached at predetermined distances on a V-shaped lamp-mounting frame 3, as shown in FIG. 3, has been proposed.
  • the lighting apparatus using light emitting diodes can adjust the light distribution and light distribution area by adjusting the angle of the lamp-mounting frame 3, it is limited in the adjustment and causes a problem, such as impeding safety while walking and driving due to glaring, because the light emitting diode modules 2 are exposed to the outside and the light of the light emitting diodes is directly transmitted to the eyes of pedestrians or drivers.
  • the housings of the lighting apparatuses using light emitting diodes as described above that is, streetlights should have an upper surface larger than a predetermined area to attach light emitting diodes, there was a problem in that rain collects or snow lies on the upper surface during rainy or snowy weather, causing leakage of electricity.
  • housings of the streetlights are installed and used at specific positions outdoors for a long period of time, birds frequently build nests on the upper surface larger than a predetermined area, thereby causing safety accidents including leakage of electricity.
  • a lighting apparatus using light emitting diodes that includes: a hollow housing that has a hollow portion with a hole at the upper portion and a side formed along the outer circumference of the hollow portion; and a plurality of light emitting diode modules that is attached to the inner surface of the side of the hollow housing.
  • the weight is decreased and the installation safety is increased. Therefore, it is possible to minimize danger of leakage of electricity and other safety accidents by preventing water and snow from collecting or birds from building nests on the upper portion during use.
  • the present invention since it is possible to achieve a large light distribution area and high luminance and adjust the attached angles and the number of light emitting diode modules, it is possible to freely form light distributions, which are mainly used for lighting the outside, thereby allowing more free lighting design.
  • FIG. 1 is a schematic view showing general shapes of light distribution.
  • FIGS. 2 and 3 are schematic views showing a lighting apparatus using light emitting diodes in the related art.
  • FIG. 4 is an exploded perspective view illustrating the configuration of the present invention.
  • FIG. 5 is a perspective view showing the assembly of the present invention of FIG. 3.
  • FIGS. 6 to 8 are front views showing various embodiments of a hollow housing of the present invention.
  • FIG. 9 is a cross-sectional view showing the structure of the present invention.
  • FIGS. 10 to 14 are perspective views showing various embodiments of a sloped-block member of the present invention.
  • FIGS. 15 to 22 are views showing embodiments of forming light distribution types that are used for lighting a street according to the present invention.
  • FIG. 4 is an exploded perspective view illustrating the configuration of the present invention, which illustrates an example of fitting a side cover, which covers the inner circumference of the side of hollow housing, into the housing.
  • FIG. 5 is perspective view showing the assembly of the present invention of FIG. 3, which shows a streetlight according to an embodiment of the present invention.
  • FIGS. 6 to 8 are front views showing various embodiments of a hollow housing of the present invention, in which the sides are inclined to widen downward and examples having one slope and a plurality of slopes are shown.
  • FIG. 9 is a cross-sectional view showing the structure of the present invention, which shows an example when a sloped-block member equipped with light emitting diode modules is detachably fastened to the inner surface of the side by bolts.
  • FIGS. 10 to 14 are perspective views showing various embodiments of a sloped-block member of the present invention, which shows various embodiments of sloped-block members having one slope or a plurality of slopes where light emitting diode modules are mounted and examples of inserting a sub-block under the rear side of the sloped-block members to lift predetermined sides of the sloped-block members at an angle.
  • FIGS. 15 to 22 are views showing embodiments of forming light distribution types that are used for lighting a street according to the present invention, which shows embodiments according to the second light distribution type, third light distribution type, fourth light distribution type, and fifth light distribution type, which are mainly used for lighting streets.
  • a hollow housing 10 of the present invention has a circular hollow portion 11 with a hole 11a at the upper portion and a side12 formed along the outer circumference of the hollow portion 11, in which the side 12 is basically inclined while the end widens.
  • the hollow housing 10 is formed in a cone shape with the end of the side 12 widened and light emitting diode modules 20 are attached to the inner surface of the inclined side 12 to light outside, such as a street or the ground through an opening of the hollow housing 10 that is open at a predetermined angle.
  • the upper and lower portions are parallel and the side 12 may be formed of one slope.
  • the inclination of the side 12 is basically 60° from the upper plane or the lower plane, or may have various angles according to desired light distributions in street-lighting design.
  • the hollow housing 10, as shown in FIG. 7, may be formed such that the upper portion is inclined from one side to the other side to decrease the height of the side 12 from one side to the other side.
  • the light emitting diode modules 20 are attached to the inner surface of the side 12, in detail, are attached to face the object to light from the inner surface of the side 12, that is, attached to the portion that is inclined to face the street, because they only have to focus light only onto the street for lighting when being used for a streetlight.
  • one side of the side 12 of the hollow housing 10 is formed high to attach a plurality of light emitting diode modules 20 and the other side of the side 12 where a small number of or no light emitting diode modules 20 is attached is formed low, thereby reducing the weight and the manufacturing cost.
  • the hollow housing 10 since the upper portion is inclined to one side, the hollow housing 10 has a shape to easily form a heat sink 13 at the upper portion, which facilitates the designing and manufacturing of focusing light in one direction and reduces the manufacturing cost.
  • the side 12 of the hollow housing 10, as shown in FIG. 8, may be formed to have a plurality of slopes having different inclinations.
  • the slope of the side 12 has first, second, and third slopes 12a, 12b, 12c of which the angles with respect to a reference line parallel with the lower end of the side 12 increase downward from the upper portion, for example, the first slope 12a has an inclination ⁇ of 50° from the reference line, the second slope 12b has an inclination ⁇ of 60°, and the third slope 12c has an inclination ⁇ of 70°, and the angles may be variously set according to desired light distributions in lighting design.
  • the light emitting diode modules 20 that receive electric power and emit light are attached to the inner surface of the side 12.
  • the light emitting diode modules 20, though not shown, may be any modules well known in the art, including a metallic printed circuit board (not shown) that is connected to a power source to be supplied with power, a light emitting diode chip that is mounted on the metallic printed circuit board and emit light by power supplied, and a lens unit that focuses light emitted from the light emitting diode chip, in which the output power and the number of light emitting diode modules can be variously changed according to the lighting design.
  • the lens unit of the light emitting diode module 20 is a part that adjust the radiation range of light by focusing the light emitted from the light emitting diode chip and a 12°lens, a 25°lens, a 30°lens, and a 45° lens are used according to the radiation range, which has been well known in the art, thus a detailed description will not be provided.
  • the light emitting diode modules 20 are directly attached to the inner surface of the side 12 to enable various lighting design using the inclination of the side 12; however, it may be possible to attach the light emitting diode modules to a sloped-block member 40 that has a slope having a predetermined inclination at one side and is attached to the inner surface of the side 12.
  • the sloped-block member 40 makes it possible to attach the light emitting diode modules 20 to the inner surface of the side 12 in various combinations of inclinations, thereby enabling more free lighting design.
  • the sloped-block member 40 is basically detachably fastened by block-fastening bolts that are screwed to the side 12 of the hollow housing 10 through the sloped-block member 40.
  • the hollow housing 10 is provided with a heat sink 13 for discharging heat at the top.
  • the heat sink 13 includes a plurality of fins or radiating means, which protrude at a predetermined distance at the upper portion of the hollow housing 10, to increase the heat transfer area, such that the light emitting diode modules 20 are prevented from being damaged by heat, by discharging the heat generated from the light emitting diode modules 20.
  • the heat sink 13 is provided at the outer surface of the side 12 of the hollow housing 10.
  • the light emitting diode modules 20 are attached only to the inner surface of the side 12 of the hollow housing 10.
  • the heat sink 13 to the outer surface of the side 12 which focuses the heat in order to prevent fault or malfunction of the light emitting dioed modules 20.
  • a hollow cover 30 that is made of a transparent or semitransparent material transmitting light is detachably attached to the hollow housing 10 to cover the inner surface of the side 12.
  • a second thread-fastening portion 14 where the first thread-fastening portion 32 is thread-fastened is formed at the side 12 of the hollow housing 10, in which the second thread-fastening portion 14 is formed along the inner circumference of the lower portion of the side 12.
  • the hollow cover 30 is detachably combined with the hollow housing 10, with the upper end of the hollow cover 30 inserted in the hole 11a of the hollow portion 11 and the lower end thread-fastened to the lower end of the hollow housing 10.
  • the gap defined between the hollow cover 30 and the side 12 of the hollow housing 10 is a space where the light emitting diode modules 20 are disposed.
  • the hollow cover 30 increases durability by protecting the light emitting diode modules 20 from external shock or foreign materials.
  • the sloped-block member 40 may be formed to have one slope where the light emitting diode modules 20 are attached.
  • sloped-block member 40 as shown in FIGS. 11 to 14, may be formed to have a plurality of slopes.
  • the sloped-block member 40 includes a first sloped-block 41 having one or more slopes and attached to the upper portion of the inner surface of the side 12 and a second sloped-block 42 having one or more slopes and attached to the lower portion of the inner surface of the side 12.
  • the first and second sloped-blocks 41, 42 may be attached to the inner surface of the side 12 or combined with each other in various combinations having a plurality of slopes according to the lighting design, such that it is possible to more freely design the lighting and freely change light distributions according to the lighting design.
  • sloped-block member 40 having a plurality of slopes may be used with the light emitting diode modules 20 attached to only any one slope of the slopes.
  • the light emitting diode modules 20 to the lower surface of the sloped-block member 40 to light vertically down from the hollow housing member 10.
  • a sub-block member 50 having a slope may be inserted between the inner surface of the hollow housing 10 and the sloped-block member 40.
  • the light distribution and the cut-off-angle can be changed in various ways according to the inclined angle of the side 12, the attached angles of the light emitting diode modules 20, and the number of light emitting diode modules 20, such that it is possible to more freely design the lighting by variously adjusting the angles of the light emitting diode modules 20 by inserting the sub-block member 50 between the inner surface of the side 12 and the sloped-block member 40.
  • the sub-block member 50 has one or more slopes and, though not shown, may have a pair of slopes facing each other.
  • the sub-block member 50 can any shape having slopes that allow adjusting the attached angles of the light emitting diodes 20 between the inner surface of the side 12 and the sloped-block member 40 equipped with the light emitting diode modules 20.
  • the sub-block member 50 makes it possible to adjust the angle of the sloped-block member 40 in both side directions and also in the up-down direction between the sloped-block member 40 and the inner surface of the side 12.
  • the hollow housing 10 is formed in a donut shape with the upper portion communicated with the inside through the hole 11a formed at the upper portion, such that air can effectively cool the heat generated by the light emitting diode modules 20, smoothly passing through the inside of the hollow housing 10, when it is installed and used outdoors.
  • Examples of light distributions that are mainly used for lighting a street in the present invention that is, examples of lighting in various ways of the second light distribution type, the third light distribution type, the fourth light distribution type, and the fifth light distribution type are described hereafter.
  • the inner surface of the side 12 is provided with first and second base attachment portions 100, 101 that are divided eighteen equal parts and face each other to attach the sloped-block member 40, and a first attachment portion to eighth attachment portion 110, 120, 130, 140, 150, 160, 170, 180 that are sequentially provided from the first base attachment portion 100 to the second base attachment portion 101 and make a symmetrical pair with respect to the first and second base attachment portions 100, 101.
  • sloped-block members 40 equipped with eight light emitting diode modules 20 are attached to the fourth and fifth attachment portions 140, 150
  • sloped-block members 40 equipped with six light emitting diode modules 20 are attached to the first and second attachment portions 110, 120
  • a sloped-block member equipped with ten light emitting diode modules 20 are attached to the third attachment portion 130, in which the sloped-block members 40 attached to the fourth and fifth attachment portions 140, 150 are inclined at 10° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 10° and two light emitting diode modules 20 are attached to the lower surface of the sloped-block member 40 attached to the first attachment portion 110.
  • This embodiment makes it possible to light in the second light distribution type using eighty light emitting diodes 20 of 80 lm/w, and it can be seen that the light distribution shown in FIG. 16 is generated by the lighting according to this embodiment.
  • a sloped-block member 40 equipped with six light emitting diode modules 20 is attached to the first base attachment portion 100, sloped-block members 40 equipped with ten light emitting diode modules 20 are attached to the first, second, and third attachment portions 110, 120, 130, and a sloped-block member 40 equipped with six light emitting diode modules 20 are attached to the fourth attachment portion 140, in which the sloped-block members 40 attached to the second and third attachment portions 120, 130 are inclined at 10° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 10° and two light emitting diode modules 20 are attached to the lower surface of the sloped-blocks 40 attached to the fourth attachment portion 140.
  • This embodiment makes it possible to light in the third light distribution type using eighty two light emitting diodes 20 of 80 lm/w and it can be seen that the light distribution shown in FIG. 18 is generated by the lighting according to this embodiment.
  • sloped-block members 40 equipped with ten light emitting diode modules 20 are attached to the first base attachment portion 100 and the first, second, and third attachment portions 110, 120, 130, and a sloped-block member 40 equipped with four light emitting diode modules 20 are attached to the fourth attachment portion 140, in which the sloped-block members 40 attached to the first, second, and third attachment portions 110, 120, 130 are inclined at 20° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 20° and two light emitting diode modules 20 are attached to the lower surface of the sloped-block member 40 attached to the fourth attachment portion 140.
  • This embodiment makes it possible to light in the fourth light distribution type using eighty two light emitting diode modules 20 of 80 lm/w and it can be seen that the light distribution shown in FIG. 20 is generated by the lighting according to this embodiment.
  • sloped-block members 40 equipped with six light emitting diode modules 20 are attached to the first and second base attachment portions 100, 101 and the first, third, fourth, fifth, sixth, and eighth attachment portions 110, 130, 140, 150, 160, 180 and sloped-block members 40 equipped with four light emitting diode modules 20 are attached to the second and seventh attachment portions 120, 170, in which the sloped-block members 40 attached to the first and fourth attachment portions 110, 140 are inclined at 10° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 10°, the sloped-block members 40 attached to the fifth and the eighth attachment portions 150, 180 are inclined at 10° toward the first base attachment portion 100 by inserting sub-block members 50 having a slope of 10°, and two light emitting diode modules 20 area attached to the lower surface of the sloped-block members 40 attached to the first and second base attachment portions 100, 101.
  • This embodiment makes it possible to light in the fifth light distribution type using ninety light emitting diode modules 20 of 80 lm/w and it can be seen that the light distribution shown in FIG. 22 is generated by the lighting according to this embodiment.
  • the present invention is basically used for a streetlamp as described above and it should be understood that the present invention can be used for other various purposes for lighting in various light distribution types.

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  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The present invention relates to a lighting apparatus using light emitting diodes, which is a lighting apparatus that includes a hollow housing 10 having a hollow portion 11 with a hole 11a at the upper portion and a side 12 around the outer circumference of the hollow portion 11, and is provided with a plurality of light emitting diode modules 20 that is attached to the inner surface of the side 12 of the hollow housing, and radiates light generated by the light emitting diode modules 20 attached to the inner surface of the side 12 of the hollow housing 10.

Description

LIGHTING APPARATUS USING LIGHT EMITTING DIODE
The present invention relates to a lighting apparatus using light emitting diodes, particularly a lighting apparatus using light emitting diodes that can be easily designed to have a light distribution type mainly used for outdoor lighting and can be safely used outdoors.
In general, a streetlight is a typical lighting apparatus that has been used outdoors, and streetlights are lighting apparatuses installed along streets to ensure safety for traffic and public security and illuminate streets and around the streets, and appropriate streetlights are used according to the installation places, such as a highway, main streets of an urban district, streets of a business district, and streets of residence district.
These streetlights generally include a lamp housing that is provided with a reflective plate on the inner side and attached to the electric pole of a streetlight, and a light source that is disposed in the lamp housing and emits light.
There are various types of lampposts, such as a high-way type lamppost with a lamp at a bent end, a bracket type lamppost with a lamp at a transversely branched end, and a lamppost head type with a lamp at the top of a lamppost.
Further, a high pressure mercury lamp, a fluorescent lamp, a high pressure sodium lamp, a metal halide lamp and a common electric bulb are used as the light source.
The streetlights emit light of white, yellow, or blue, etc., using light sources having predetermined colors. Further, the light sources may be selected according to the power efficiency of the streetlights, light intensities, or the atmosphere.
The streetlights are designed such that the light distribution that is radiated on the streets has the most effective shape to light the streets when being installed on the streets, and the light distribution commonly used for lighting the streets is divided into a first light distribution type to a fifth light distribution type, as shown in FIG. 1, in which most streets are effectively lighted by the second, third, and fourth light distribution types, except for some specific cases.
Streetlights in the related art light streets with appropriate light distributions that have been implemented in street-lighting design by adjusting the reflective angles of the reflective plates provided on the inner side of the lamp housings.
However, since the luminance and diffusion range of various lamps used for the light sources of the streetlights, such as high pressure mercury lamps, fluorescent lamps, and sodium lamps, are fixed in manufacturing in the related art, it is difficult for users to adjust them at their options, and the life span is very short and large amount of power is consumed.
Lighting apparatuses using LEDs (Light Emitting Diode) as the light source have been recently proposed in consideration of the above problems, and with the increase of technology, light emitting diodes that consume small amount of power and emit light with high luminance have been developed and increasingly distributed.
Lighting apparatuses using light emitting diodes, as shown in FIG. 2, generally include a plurality of light emitting diode modules 2 attached to the lower surface of the upper plate 1a of a lamp housing 1 and light a street using reflective plates 1c disposed on the sides 1b of the lamp housing 1.
In the lighting apparatuses using light emitting diodes, the plurality of light emitting diode modules 2 are attached to the lower surface of the upper plate 1a to ensure a cut-off-angle at which pedestrians or drivers cannot directly see the light sources, that is, the light emitting diode modules 2 within a predetermined range of angle.
Not only lighting apparatuses using light emitting diodes, but lighting apparatuses including light emitting diodes should necessarily ensure the cut-off-angle because the light of the light sources may cause an accident by interfering with walking or driving if pedestrians or drivers directly see the light while walking or driving.
However, although the light emitting diode has a long life span that can be considered as semi-permanent as compared with lamps used in the related art, the luminance is determined by combination of a plurality of light emitting diodes. Therefore, forming light distributions by using reflective plates has a limit in forming light distributions that can effectively light streets, that is, the first to fifth light distributions, as well as, small light distribution areas and luminance.
Therefore, since the lighting apparatuses using light emitting diodes provide luminance only by using reflective plates without taking into consideration of ideal arrangement while manufacturing, lighting of streets is inefficient and cannot be commonly used.
Further, a lighting apparatus using light emitting diodes, which is equipped with a plurality of light emitting diode modules 2 attached at predetermined distances on a V-shaped lamp-mounting frame 3, as shown in FIG. 3, has been proposed.
Although the lighting apparatus using light emitting diodes can adjust the light distribution and light distribution area by adjusting the angle of the lamp-mounting frame 3, it is limited in the adjustment and causes a problem, such as impeding safety while walking and driving due to glaring, because the light emitting diode modules 2 are exposed to the outside and the light of the light emitting diodes is directly transmitted to the eyes of pedestrians or drivers.
Further, since the housings of the lighting apparatuses using light emitting diodes as described above, that is, streetlights should have an upper surface larger than a predetermined area to attach light emitting diodes, there was a problem in that rain collects or snow lies on the upper surface during rainy or snowy weather, causing leakage of electricity.
Further, since the housings of the streetlights are installed and used at specific positions outdoors for a long period of time, birds frequently build nests on the upper surface larger than a predetermined area, thereby causing safety accidents including leakage of electricity.
In addition, since the housings of the streetlights are sealed at the lower portions by a cover plate to prevent foreign materials from coming into the housing, it is difficult to effectively discharge the heat generated by the light emitting diodes, such that the life span of the light emitting diodes is decreased and a large amount of cost is additionally increased for maintenance.
It is an object of the present invention to provide a lighting apparatus using light emitting diodes that has a large light distribution area with high luminance, can effectively produce light distributions in various ways, and allows more free lighting design.
It is another object of the present invention to provide a lighting apparatus using light emitting diodes that can prevent problems caused by collection of rain or snow, or birds building a nest on the upper surface, when it is used for a long period of time outdoors.
It is another object of the present invention to provide a lighting apparatus using light emitting diodes that is not heavy, prevents damage to light emitting diode modules due to heat by increasing the effect of heat discharge of the light emitting diodes, thereby increasing the life span.
The objects of the present invention can be achieved by providing a lighting apparatus using light emitting diodes that includes: a hollow housing that has a hollow portion with a hole at the upper portion and a side formed along the outer circumference of the hollow portion; and a plurality of light emitting diode modules that is attached to the inner surface of the side of the hollow housing.
According to the present invention, since a hollow housing with the upper and lower portions open is provided, the weight is decreased and the installation safety is increased. Therefore, it is possible to minimize danger of leakage of electricity and other safety accidents by preventing water and snow from collecting or birds from building nests on the upper portion during use.
According to the present invention, since air can effectively discharge heat generated by light emitting diodes while passing through the inside of the housing, it is possible to increase the life span of the light emitting diodes and save the cost for maintenance.
According to the present invention, since it is possible to achieve a large light distribution area and high luminance and adjust the attached angles and the number of light emitting diode modules, it is possible to freely form light distributions, which are mainly used for lighting the outside, thereby allowing more free lighting design.
FIG. 1 is a schematic view showing general shapes of light distribution.
FIGS. 2 and 3 are schematic views showing a lighting apparatus using light emitting diodes in the related art.
FIG. 4 is an exploded perspective view illustrating the configuration of the present invention.
FIG. 5 is a perspective view showing the assembly of the present invention of FIG. 3.
FIGS. 6 to 8 are front views showing various embodiments of a hollow housing of the present invention.
FIG. 9 is a cross-sectional view showing the structure of the present invention.
FIGS. 10 to 14 are perspective views showing various embodiments of a sloped-block member of the present invention.
FIGS. 15 to 22 are views showing embodiments of forming light distribution types that are used for lighting a street according to the present invention.
Preferred embodiments of the invention are described hereafter in detail with reference to the accompanying drawings.
FIG. 4 is an exploded perspective view illustrating the configuration of the present invention, which illustrates an example of fitting a side cover, which covers the inner circumference of the side of hollow housing, into the housing.
FIG. 5 is perspective view showing the assembly of the present invention of FIG. 3, which shows a streetlight according to an embodiment of the present invention.
FIGS. 6 to 8 are front views showing various embodiments of a hollow housing of the present invention, in which the sides are inclined to widen downward and examples having one slope and a plurality of slopes are shown.
FIG. 9 is a cross-sectional view showing the structure of the present invention, which shows an example when a sloped-block member equipped with light emitting diode modules is detachably fastened to the inner surface of the side by bolts.
FIGS. 10 to 14 are perspective views showing various embodiments of a sloped-block member of the present invention, which shows various embodiments of sloped-block members having one slope or a plurality of slopes where light emitting diode modules are mounted and examples of inserting a sub-block under the rear side of the sloped-block members to lift predetermined sides of the sloped-block members at an angle.
FIGS. 15 to 22 are views showing embodiments of forming light distribution types that are used for lighting a street according to the present invention, which shows embodiments according to the second light distribution type, third light distribution type, fourth light distribution type, and fifth light distribution type, which are mainly used for lighting streets.
A hollow housing 10 of the present invention, as shown in FIG. 5, has a circular hollow portion 11 with a hole 11a at the upper portion and a side12 formed along the outer circumference of the hollow portion 11, in which the side 12 is basically inclined while the end widens.
The hollow housing 10 is formed in a cone shape with the end of the side 12 widened and light emitting diode modules 20 are attached to the inner surface of the inclined side 12 to light outside, such as a street or the ground through an opening of the hollow housing 10 that is open at a predetermined angle.
In the hollow housing 10, as shown in FIG. 6, the upper and lower portions are parallel and the side 12 may be formed of one slope.
The inclination of the side 12 is basically 60° from the upper plane or the lower plane, or may have various angles according to desired light distributions in street-lighting design.
Further, the hollow housing 10, as shown in FIG. 7, may be formed such that the upper portion is inclined from one side to the other side to decrease the height of the side 12 from one side to the other side.
The light emitting diode modules 20 are attached to the inner surface of the side 12, in detail, are attached to face the object to light from the inner surface of the side 12, that is, attached to the portion that is inclined to face the street, because they only have to focus light only onto the street for lighting when being used for a streetlight.
Therefore, one side of the side 12 of the hollow housing 10 is formed high to attach a plurality of light emitting diode modules 20 and the other side of the side 12 where a small number of or no light emitting diode modules 20 is attached is formed low, thereby reducing the weight and the manufacturing cost.
This is for reducing the manufacturing cost and improving the lighting efficiency by attaching a sufficient number of light emitting diode modules 20 only to the side 12 facing the street and reducing the number of light emitting diode modules 20 that do not light the street, when lighting the street from the lamppost of a streetlight.
Further, since the upper portion is inclined to one side, the hollow housing 10 has a shape to easily form a heat sink 13 at the upper portion, which facilitates the designing and manufacturing of focusing light in one direction and reduces the manufacturing cost.
The side 12 of the hollow housing 10, as shown in FIG. 8, may be formed to have a plurality of slopes having different inclinations.
The slope of the side 12 has first, second, and third slopes 12a, 12b, 12c of which the angles with respect to a reference line parallel with the lower end of the side 12 increase downward from the upper portion, for example, the first slope 12a has an inclination α of 50° from the reference line, the second slope 12b has an inclination β of 60°, and the third slope 12c has an inclination γ of 70°, and the angles may be variously set according to desired light distributions in lighting design.
Meanwhile, the light emitting diode modules 20 that receive electric power and emit light are attached to the inner surface of the side 12.
The light emitting diode modules 20, though not shown, may be any modules well known in the art, including a metallic printed circuit board (not shown) that is connected to a power source to be supplied with power, a light emitting diode chip that is mounted on the metallic printed circuit board and emit light by power supplied, and a lens unit that focuses light emitted from the light emitting diode chip, in which the output power and the number of light emitting diode modules can be variously changed according to the lighting design.
The lens unit of the light emitting diode module 20 is a part that adjust the radiation range of light by focusing the light emitted from the light emitting diode chip and a 12°lens, a 25°lens, a 30°lens, and a 45° lens are used according to the radiation range, which has been well known in the art, thus a detailed description will not be provided.
Basically, the light emitting diode modules 20 are directly attached to the inner surface of the side 12 to enable various lighting design using the inclination of the side 12; however, it may be possible to attach the light emitting diode modules to a sloped-block member 40 that has a slope having a predetermined inclination at one side and is attached to the inner surface of the side 12.
The sloped-block member 40 makes it possible to attach the light emitting diode modules 20 to the inner surface of the side 12 in various combinations of inclinations, thereby enabling more free lighting design.
Further, it is possible to freely change the lighting design by detachably attaching the sloped-block member 40 to the inner surface of the side 12 to change the sloped-block member 40 during use and the sloped-block member 40 is basically detachably fastened by block-fastening bolts that are screwed to the side 12 of the hollow housing 10 through the sloped-block member 40. However, though not shown, it may be possible to form a projection at any one of the rear side of the sloped-block member 40 and the inner surface of the side 12 and a groove corresponding to the projection at the other one to fit the projection, and then detachably attach the sloped-block member 40 by fitting the projection into the groove, and it should be understood that any configurations for detachably combining the sloped-block member 40 known in the art are included in the present invention.
Further, it is preferable that the hollow housing 10 is provided with a heat sink 13 for discharging heat at the top.
The heat sink 13 includes a plurality of fins or radiating means, which protrude at a predetermined distance at the upper portion of the hollow housing 10, to increase the heat transfer area, such that the light emitting diode modules 20 are prevented from being damaged by heat, by discharging the heat generated from the light emitting diode modules 20.
It is preferable that the heat sink 13 is provided at the outer surface of the side 12 of the hollow housing 10.
The light emitting diode modules 20 are attached only to the inner surface of the side 12 of the hollow housing 10.
Accordingly, since heat of the light emitting diode modules 20 is focused on the side 12 of the hollow housing 10, it is preferable to attach the heat sink 13 to the outer surface of the side 12 which focuses the heat in order to prevent fault or malfunction of the light emitting dioed modules 20.
Further, a hollow cover 30 that is made of a transparent or semitransparent material transmitting light is detachably attached to the hollow housing 10 to cover the inner surface of the side 12.
Basically, a flange 31 having a first thread-fastening portion 32, which is thread-fastened to the hollow housing 10, protrudes from the lower circumference of the hollow cover 30 to be attached to the inner surface of the side 12 with a gap for attaching the light emitting diode modules.
A second thread-fastening portion 14 where the first thread-fastening portion 32 is thread-fastened is formed at the side 12 of the hollow housing 10, in which the second thread-fastening portion 14 is formed along the inner circumference of the lower portion of the side 12.
That is, the hollow cover 30 is detachably combined with the hollow housing 10, with the upper end of the hollow cover 30 inserted in the hole 11a of the hollow portion 11 and the lower end thread-fastened to the lower end of the hollow housing 10.
The gap defined between the hollow cover 30 and the side 12 of the hollow housing 10 is a space where the light emitting diode modules 20 are disposed.
The hollow cover 30 increases durability by protecting the light emitting diode modules 20 from external shock or foreign materials.
On the other hand, the sloped-block member 40, as shown in FIG. 10, may be formed to have one slope where the light emitting diode modules 20 are attached.
Further, the sloped-block member 40, as shown in FIGS. 11 to 14, may be formed to have a plurality of slopes.
The sloped-block member 40 includes a first sloped-block 41 having one or more slopes and attached to the upper portion of the inner surface of the side 12 and a second sloped-block 42 having one or more slopes and attached to the lower portion of the inner surface of the side 12.
The first and second sloped- blocks 41, 42 may be attached to the inner surface of the side 12 or combined with each other in various combinations having a plurality of slopes according to the lighting design, such that it is possible to more freely design the lighting and freely change light distributions according to the lighting design.
Further, the sloped-block member 40 having a plurality of slopes may be used with the light emitting diode modules 20 attached to only any one slope of the slopes.
Further, it is preferable to attach the light emitting diode modules 20 to the lower surface of the sloped-block member 40 to light vertically down from the hollow housing member 10.
A sub-block member 50 having a slope may be inserted between the inner surface of the hollow housing 10 and the sloped-block member 40.
In the present invention, the light distribution and the cut-off-angle can be changed in various ways according to the inclined angle of the side 12, the attached angles of the light emitting diode modules 20, and the number of light emitting diode modules 20, such that it is possible to more freely design the lighting by variously adjusting the angles of the light emitting diode modules 20 by inserting the sub-block member 50 between the inner surface of the side 12 and the sloped-block member 40.
The sub-block member 50 has one or more slopes and, though not shown, may have a pair of slopes facing each other. Alternatively, it should be understood that the sub-block member 50 can any shape having slopes that allow adjusting the attached angles of the light emitting diodes 20 between the inner surface of the side 12 and the sloped-block member 40 equipped with the light emitting diode modules 20.
That is, the sub-block member 50 makes it possible to adjust the angle of the sloped-block member 40 in both side directions and also in the up-down direction between the sloped-block member 40 and the inner surface of the side 12.
According to the present invention, the hollow housing 10 is formed in a donut shape with the upper portion communicated with the inside through the hole 11a formed at the upper portion, such that air can effectively cool the heat generated by the light emitting diode modules 20, smoothly passing through the inside of the hollow housing 10, when it is installed and used outdoors.
Further, rain or snow cannot collect or lie, nor can birds build a nest on the upper portion of the hollow housing 10, such that leakage of electricity due to these reasons can be prevented.
Examples of light distributions that are mainly used for lighting a street in the present invention, that is, examples of lighting in various ways of the second light distribution type, the third light distribution type, the fourth light distribution type, and the fifth light distribution type are described hereafter.
It is applied to all of the following examples that the inner surface of the side 12 is provided with first and second base attachment portions 100, 101 that are divided eighteen equal parts and face each other to attach the sloped-block member 40, and a first attachment portion to eighth attachment portion 110, 120, 130, 140, 150, 160, 170, 180 that are sequentially provided from the first base attachment portion 100 to the second base attachment portion 101 and make a symmetrical pair with respect to the first and second base attachment portions 100, 101.
[First Embodiment]
As shown in FIG. 15, sloped-block members 40 equipped with eight light emitting diode modules 20 are attached to the fourth and fifth attachment portions 140, 150, sloped-block members 40 equipped with six light emitting diode modules 20 are attached to the first and second attachment portions 110, 120, a sloped-block member equipped with ten light emitting diode modules 20 are attached to the third attachment portion 130, in which the sloped-block members 40 attached to the fourth and fifth attachment portions 140, 150 are inclined at 10° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 10° and two light emitting diode modules 20 are attached to the lower surface of the sloped-block member 40 attached to the first attachment portion 110.
This embodiment makes it possible to light in the second light distribution type using eighty light emitting diodes 20 of 80 lm/w, and it can be seen that the light distribution shown in FIG. 16 is generated by the lighting according to this embodiment.
[Second Embodiment]
As shown in FIG. 17, a sloped-block member 40 equipped with six light emitting diode modules 20 is attached to the first base attachment portion 100, sloped-block members 40 equipped with ten light emitting diode modules 20 are attached to the first, second, and third attachment portions 110, 120, 130, and a sloped-block member 40 equipped with six light emitting diode modules 20 are attached to the fourth attachment portion 140, in which the sloped-block members 40 attached to the second and third attachment portions 120, 130 are inclined at 10° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 10° and two light emitting diode modules 20 are attached to the lower surface of the sloped-blocks 40 attached to the fourth attachment portion 140.
This embodiment makes it possible to light in the third light distribution type using eighty two light emitting diodes 20 of 80 lm/w and it can be seen that the light distribution shown in FIG. 18 is generated by the lighting according to this embodiment.
[Third Embodiment]
As shown in FIG. 19, sloped-block members 40 equipped with ten light emitting diode modules 20 are attached to the first base attachment portion 100 and the first, second, and third attachment portions 110, 120, 130, and a sloped-block member 40 equipped with four light emitting diode modules 20 are attached to the fourth attachment portion 140, in which the sloped-block members 40 attached to the first, second, and third attachment portions 110, 120, 130 are inclined at 20° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 20° and two light emitting diode modules 20 are attached to the lower surface of the sloped-block member 40 attached to the fourth attachment portion 140.
This embodiment makes it possible to light in the fourth light distribution type using eighty two light emitting diode modules 20 of 80 lm/w and it can be seen that the light distribution shown in FIG. 20 is generated by the lighting according to this embodiment.
[Fourth Embodiment]
As shown in FIG. 21, sloped-block members 40 equipped with six light emitting diode modules 20 are attached to the first and second base attachment portions 100, 101 and the first, third, fourth, fifth, sixth, and eighth attachment portions 110, 130, 140, 150, 160, 180 and sloped-block members 40 equipped with four light emitting diode modules 20 are attached to the second and seventh attachment portions 120, 170, in which the sloped-block members 40 attached to the first and fourth attachment portions 110, 140 are inclined at 10° toward the second base attachment portion 101 by inserting sub-block members 50 having a slope of 10°, the sloped-block members 40 attached to the fifth and the eighth attachment portions 150, 180 are inclined at 10° toward the first base attachment portion 100 by inserting sub-block members 50 having a slope of 10°, and two light emitting diode modules 20 area attached to the lower surface of the sloped-block members 40 attached to the first and second base attachment portions 100, 101.
This embodiment makes it possible to light in the fifth light distribution type using ninety light emitting diode modules 20 of 80 lm/w and it can be seen that the light distribution shown in FIG. 22 is generated by the lighting according to this embodiment.
The present invention is not limited to the above embodiments and it should be understood that the present invention can be modified in various ways without departing from the spirit of the present invention and the modifications are included in the present invention.
Further, the present invention is basically used for a streetlamp as described above and it should be understood that the present invention can be used for other various purposes for lighting in various light distribution types.

Claims (12)

  1. A lighting apparatus using light emitting diodes, comprising:
    a hollow housing that has a hollow portion with a hole at the upper portion and a side formed along the outer circumference of the hollow portion; and
    a plurality of light emitting diode modules that is attached to the inner surface of the side of the hollow housing.
  2. The lighting apparatus using light emitting diodes according to claim 1, wherein the side is inclined such that the end widens.
  3. The lighting apparatus using light emitting diodes according to claim 1, wherein the side of the hollow housing has a plurality of slopes having different inclinations.
  4. The lighting apparatus using light emitting diodes according to claim 1, wherein a plurality of the light emitting diode modules are attached to a portion facing an object to light, on the inner surface of the side.
  5. The lighting apparatus using light emitting diodes according to claim 1, wherein the light emitting diode module is attached to a sloped-block member having a slope at one surface and attached to the inner surface of the side.
  6. The lighting apparatus using light emitting diodes according to claim 5, wherein the sloped-block member is detachably attached to the inner surface of the side.
  7. The lighting apparatus using light emitting diodes according to claim 5, wherein light emitting diode modules are attached to the lower surface of the sloped-block member.
  8. The lighting apparatus using light emitting diodes according to claim 5, further comprising a sub-block member having a slope which is inserted between the inner surface of the hollow housing and the sloped-block member.
  9. The lighting apparatus using light emitting diodes according to claim 1, wherein a hollow cover that is made of a transparent or semitransparent material transmitting light is detachably attached to the hollow housing to cover the inner surface of the side.
  10. The lighting apparatus using light emitting diodes according to claim 9, wherein a flange having on the outer circumference a first thread-fastening portion that is thread-fastened to the hollow housing protrudes from the lower circumference of the hollow cover, and a second thread-fastening portion that is thread-fastened to the first thread-fastening portion is formed at the inner lower portion of the side.
  11. The lighting apparatus using light emitting diodes according to claim 1, wherein a heat sink for discharging heat is provided at the top of the hollow housing.
  12. The lighting apparatus using light emitting diodes according to claim 1, wherein a heat sink for discharging heat is provided at the outer surface of the side of the hollow housing.
PCT/KR2009/006257 2009-10-28 2009-10-28 Lighting apparatus using light emitting diode WO2011052816A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2009/006257 WO2011052816A1 (en) 2009-10-28 2009-10-28 Lighting apparatus using light emitting diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2009/006257 WO2011052816A1 (en) 2009-10-28 2009-10-28 Lighting apparatus using light emitting diode

Publications (1)

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WO2011052816A1 true WO2011052816A1 (en) 2011-05-05

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1021729A (en) * 1996-07-08 1998-01-23 C C S Kk Manufacture of lighting system
KR20010012585A (en) * 1997-05-16 2001-02-15 노쓰이스트 로보틱스 엘엘씨 Flexible lighting element circuit and method of manufacturing the same
JP2002083506A (en) * 2000-06-21 2002-03-22 Moritex Corp Led lighting system and its manufacturing method
US7434959B1 (en) * 2007-08-14 2008-10-14 Augux Co., Ltd. LED lamp device
KR20090132785A (en) * 2008-06-23 2009-12-31 주식회사 웰라이트 Lighting apparatus using light emitting diode

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1021729A (en) * 1996-07-08 1998-01-23 C C S Kk Manufacture of lighting system
KR20010012585A (en) * 1997-05-16 2001-02-15 노쓰이스트 로보틱스 엘엘씨 Flexible lighting element circuit and method of manufacturing the same
JP2002083506A (en) * 2000-06-21 2002-03-22 Moritex Corp Led lighting system and its manufacturing method
US7434959B1 (en) * 2007-08-14 2008-10-14 Augux Co., Ltd. LED lamp device
KR20090132785A (en) * 2008-06-23 2009-12-31 주식회사 웰라이트 Lighting apparatus using light emitting diode

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