WO2012070749A2 - Appareil d'éclairage à led - Google Patents

Appareil d'éclairage à led Download PDF

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Publication number
WO2012070749A2
WO2012070749A2 PCT/KR2011/006207 KR2011006207W WO2012070749A2 WO 2012070749 A2 WO2012070749 A2 WO 2012070749A2 KR 2011006207 W KR2011006207 W KR 2011006207W WO 2012070749 A2 WO2012070749 A2 WO 2012070749A2
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WO
WIPO (PCT)
Prior art keywords
plane
ground
panel
light emitting
grooves
Prior art date
Application number
PCT/KR2011/006207
Other languages
English (en)
Korean (ko)
Other versions
WO2012070749A3 (fr
Inventor
우문석
Original Assignee
아이피씨코리아 주식회사
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 아이피씨코리아 주식회사 filed Critical 아이피씨코리아 주식회사
Priority to EP11843076.8A priority Critical patent/EP2644978B1/fr
Publication of WO2012070749A2 publication Critical patent/WO2012070749A2/fr
Publication of WO2012070749A3 publication Critical patent/WO2012070749A3/fr

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/049—Patterns or structured surfaces for diffusing light, e.g. frosted surfaces
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • 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
    • F21V5/00—Refractors for light sources
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/05—Optical design plane
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • 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 an LED lighting device.
  • LEDs Light emitting diodes
  • LEDs are used in various lighting devices as next-generation light sources to replace fluorescent lamps.
  • LEDs should be taken into consideration, in particular, in an external environment such as a street light, and of having to have a constant illuminance to the ground.
  • the present invention has been made to solve the above problems and / or limitations, and an object of the present invention is to provide an LED lighting device that can give a uniform illuminance to the ground.
  • Another object of the present invention is to provide an LED lighting device which further improves the heat dissipation effect and improves stability.
  • the present invention provides a panel having a flat surface and having a second plane provided on a side opposite to the first plane and the first plane, and formed on the first plane of the panel, And a light emitting part having a light emitting surface parallel to the first plane, the light emitting surface being inclined at a first angle at an acute angle with respect to the ground, and a reflecting plate extending from the panel, wherein the reflecting plate is disposed on the ground.
  • a first portion extending inclined to have a second angle smaller than the first angle with respect to the first portion, a second portion extending from the panel and extending in a direction away from the ground inclined with respect to the ground, the first portion and the second portion It provides an LED lighting device comprising a third portion for connecting.
  • the shortest distance between the light emitting surface and the ground may be shorter than the shortest distance between the first portion and the ground.
  • the first angle may be less than half of the viewing angle of the LED device.
  • the third portion may include a portion parallel to the ground.
  • the chassis plate is provided with a material coupled to the second plane of the panel and capable of transferring heat generated from the panel, and a plurality of heat dissipation fins provided on the opposite side of the panel of the chassis plate It may include.
  • the case is coupled to the chassis plate and includes a case having a space for accommodating the heat dissipation fin, the case may be provided with a plurality of vent holes penetrating the space.
  • the vent hole may include a plurality of first vent holes penetrating toward the ground and a plurality of second vent holes formed at a position higher from the ground than the first vent holes.
  • the sum of the areas of the first through holes may be larger than the sum of the areas of the second through holes.
  • it may further include a diffusion plate disposed to face the light emitting portion and the reflecting plate.
  • the diffusion plate has a third plane facing the light emitting portion and the reflecting plate, and a fourth plane opposite to the third plane, and on the third plane or the fourth plane.
  • a plurality of first grooves provided to be spaced apart from each other, and a plurality of second grooves provided to be spaced apart from each other on the third plane or the fourth plane and provided to intersect the first grooves, and the first grooves and the second grooves.
  • the grooves may be provided to be spaced apart from each other.
  • the light efficiency can be maximized to achieve uniform illuminance to the ground, thereby enabling the use of low-power LED devices, which can reduce costs and reduce power consumption.
  • FIG. 1 is a schematic diagram of a street lamp to which an LED lighting device according to an embodiment of the present invention may be applied;
  • FIG. 2 is a cross-sectional view of the LED lighting apparatus according to an embodiment of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing in detail the structure of a panel, a reflector and a light emitting unit of an LED lighting apparatus according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram schematically showing a state of light emission when the LED lighting device according to FIG. 3 is applied to a street lamp;
  • FIG. 5 is a schematic diagram schematically illustrating a state in which light is emitted when the LED lighting apparatus according to FIG. 3 is applied to a street lamp;
  • FIG. 6 is a schematic cross-sectional view showing in detail the structure of a panel, a reflector and a light emitting unit of the LED lighting apparatus according to another embodiment of the present invention.
  • FIG. 7 is a bottom perspective view of an LED lighting apparatus according to another preferred embodiment of the present invention.
  • FIG. 8 is a partial perspective view showing an example of a diffusion plate of the LED lighting apparatus according to another embodiment of the present invention.
  • Figure 9 is a partial perspective view showing another example of the diffuser plate of the LED lighting apparatus according to another embodiment of the present invention.
  • FIG. 10 is a plan view illustrating an example of a pattern of first grooves and second grooves of a diffusion plate
  • FIG. 11 is a plan view illustrating another example of a pattern of first grooves and second grooves of a diffusion plate
  • FIG. 12 is a plan view illustrating another example of a pattern of first grooves and second grooves of a diffusion plate
  • FIG. 13 is a cross-sectional view showing an LED lighting apparatus according to another embodiment of the present invention.
  • FIG. 1 illustrates a street lamp according to one embodiment to which an LED lighting device of the present invention is applied.
  • a street light disposed along a roadway and / or a sidewalk has a structure in which an LED lighting device 2 is installed on a pillar 1 arranged at a predetermined interval along the ground.
  • the light emitted from each LED lighting device (2) because the LED lighting device (2) installed on each pillar (1) has to exhibit a uniform illuminance to the ground where the light is shining in a state overlapped to some extent. It is preferable to show the form which spreads in this gull-wing shape.
  • FIG. 2 shows an LED lighting device 2 according to a preferred embodiment of the present invention.
  • FIG. 3 is a schematic diagram for illustrating the relationship between the light emitting portion 22 and the reflecting plate 23 of the LED lighting device 2 of FIG. 2.
  • the LED lighting device 2 includes a panel 21, a light emitting unit 22, and a reflecting plate 23.
  • the panel 21 is provided in a flat shape and has a first plane 211 and a second plane 212 provided on the opposite side of the first plane 211.
  • the panel 21 may be a printed circuit board (PCB), preferably a metal PCB.
  • the panel 21 may be a plate-shaped body having a rectangular surface.
  • the light emitting part 22 is formed on the first plane 211 of the panel 21.
  • the light emitting unit 22 may be configured by mounting a plurality of LED elements on a pad formed on the first plane 211 of the panel 21.
  • the LED elements may be covered by a sealing material including a phosphor.
  • the light emitting portion 22 has a light emitting surface 221 on its surface, which is a surface substantially parallel to the first plane 211.
  • Light is emitted from the light emitting surface 221 of the light emitting part 22 toward the space opposite to the first plane 211 of the panel 21.
  • the light emitting part 22 is disposed to be inclined upwardly so that the light emitting surface 221 has a first angle a1 that is an acute angle with respect to the ground 3. Therefore, if the light emitting surface 221 is completely parallel to the first plane 211 of the panel 21, the first plane 211 of the panel 21 will also have a first angle a1 with respect to the ground.
  • the reflecting plate 23 extends from the panel 21. As shown in FIG. 3, the reflective plate 23 includes first to third portions 231 to 233.
  • the first portion 231 corresponds to a portion of the reflective plate 23 disposed farthest from the light emitting portion 22.
  • the second portion 232 corresponds to a portion extending from the panel 21, and the third portion 233 corresponds to an intermediate portion connecting the first portion 231 and the second portion 232.
  • the first portion 231 is inclined upwardly to have a second angle a2 with respect to the ground 3.
  • the second angle a2 is smaller than the first angle a1.
  • the light emitting surface 221 is separated from the light emitting surface 221. Not only is the amount of light directly irradiated toward the ground 3 increased, but part of the light irradiated from the light emitting surface 221 is reflected by the reflecting plate 23 so that the surface 3 is radiated from the light emitting surface 221. It is possible to further increase the illuminance on the ground 3 to which light is irradiated by overlapping with light directly irradiated toward).
  • the second angle a2 may be set in a range of 10 to 60 degrees.
  • the light emitting surface is compared with the illuminance of light at a position far from the light emitting surface 221.
  • Roughness of the portion close to 221 may be increased, so that it may be difficult to obtain a uniform illuminance as a whole, and when the second angle a2 is smaller than 10 degrees, the amount of reflection by the reflecting plate 23 is lowered to give an overall illuminance. You can drop it.
  • the shortest distance t1 between the light emitting surface 221 and the ground 3 may be shorter than the shortest distance t2 between the first portion 231 and the ground 3.
  • the amount of light directly irradiated toward the ground 3 of the light emitted from the light emitting surface 221 is larger than the amount of light reflected by the reflector 23 so that irradiation in a wider range is possible. Can be.
  • one embodiment of the LED light emitting device 2 of the present invention can be used in a dual structure having the same panel 21, the light emitting portion 22 and the reflecting plate 23 on both sides, as shown in FIG. This is more advantageous when it is necessary to irradiate light toward both sides about the pillar 1 as in the street lamp of FIG.
  • the first angle a1 may be equal to or less than half of the viewing angle b of the LED device mounted on the light emitting part 22. Therefore, when the LED device having a viewing angle of 120 degrees is used, the first angle a1 may be smaller than 60 degrees. In the dual structure having the panel 21, the light emitting portion 22, and the reflecting plate 23 on both sides, as shown in FIG. 4, this ensures sufficient illuminance of the portion directly below the two light emitting portions 22 in the ground 3; It is for.
  • the first angle a1 is equal to half of the viewing angle b of the LED element, the light of the light emitting part 22 is directly irradiated, and since the distance between the two light emitting parts 22 is narrow, the ground 3 Sufficient brightness may be maintained even in a portion directly under the two light emitting parts 22.
  • the first angle a1 is smaller than half of the viewing angle b of the LED device, since the light of the two light emitting parts 22 overlaps with each other to some extent, at the portion immediately below the two light emitting parts 22 of the ground 3. Sufficiently bright state can be maintained.
  • the first angle a1 is the viewing angle b of the LED element mounted on the light emitting part 22. Slightly larger than half. That is, this case corresponds to the case where it is not necessary to irradiate the portion adjacent to the wall surface 31 of the ground (3), the first angle in order to allow the light to shine from a position spaced a certain distance from the wall surface (31) A1 may be slightly larger than half of the viewing angle b of the LED device mounted on the light emitting unit 22. When the first angle a1 is too large than half of the viewing angle b of the LED device, the direct light of the light emitting part 22 becomes too dark. In this case, the first angle a1 is the viewing angle b of the LED device. It is desirable to be larger in the range within 10 degrees than half of the viewing angle (b) of the LED element.
  • the second portion 232 may be extended inclined upward at a third angle (a3) with respect to the ground (3).
  • the third angle a3 may be set in a range of 10 to 60 degrees with respect to the ground.
  • the third angle a3 exceeds 60 degrees, the shape of the reflective surface 23 becomes too convex, The illuminance of the portion closer to the light emitting surface 221 may be higher than the illuminance of light at a position far from the light emitting surface 221, so that it may be difficult to obtain a uniform illuminance as a whole.
  • the third angle a3 is smaller than 10 degrees, the shape of the reflecting surface 23 becomes too flat, so that the amount of reflection by the reflecting plate 23 can be lowered and the overall roughness can be reduced.
  • the third portion 233 is a portion connecting the second portion 232 and the first portion 231 to each other in a curved shape so that light is reflected at various angles to produce a uniform illuminance toward the ground 3. Can be formed.
  • Reflector 23 can be formed in a curved shape as a whole, as shown in FIG.
  • the first portion 231 and the third portion 233 may have a radius of curvature of 40 to 80 mm, preferably 50 to 70 mm. According to one embodiment of the present invention may be approximately 60mm.
  • the second portion 232 may have a radius of curvature of 70 to 110 mm, preferably 80 to 100 mm. According to an embodiment of the present invention may be approximately 90mm.
  • the radius of curvature of the second portion 232 may be greater than the radius of curvature of the first portion 231 and / or the third portion 233. Accordingly, the reflecting plate 23 may have a portion farther from the light emitting portion 22 and a portion closer to the light emitting portion 22 to be less rounded. This structure contributes to the light emitted from the light emitting portion 22 to be more uniformly irradiated in the lower portion of the illumination according to the present invention.
  • the third portion 233 may be located closer to the first portion 231 than to the center of the first portion 231 and the second portion 232.
  • the sieve, the first portion 231 and / or the second portion 232, in which only the third portion 233 is curved, may be formed in a straight line.
  • all of the first portion 231 to the third portion 233 may be formed in a straight line.
  • the third portion 233 may be parallel to the ground.
  • the chassis plate 24 may be further coupled to the second plane 212 of the panel 21. have.
  • the chassis plate 24 is preferably made of a metal material to transfer heat generated from the panel 21, and may be formed of Al or an Al alloy.
  • the chassis plate 24 may include a first support part 241 supporting the panel 21 and a second support part 242 supporting the reflecting plate 23.
  • the first support part 241 and the second support part 242 may be provided.
  • the support part 242 may be integrally formed.
  • a heat transfer sheet may be further interposed between the first support part 241 and the panel 21.
  • the heat emitted from the light emitting part 22 by this heat transfer sheet can be more effectively transferred to the first support part 241 via the panel 21, thereby improving the heat dissipation effect of the light emitting part 22. It becomes possible.
  • a plurality of heat dissipation fins 25 may be provided on the side opposite to the panel 21 of the chassis plate 24, and the heat dissipation fins 25 may be installed on the first support part 241, so that the first heat dissipation fins 25 may be installed.
  • the heat dissipation effect of the light emitting part 22 may be further maximized. Since it is located at the shortest distance from the light emitting part 22, the heat radiation effect can be improved by that much.
  • the case may be further coupled to the chassis plate 24 as described above.
  • the case includes a first case 261 connected to the first support part 241 and a second case 262 connected to the second support part 242. ) May be included.
  • the LED lighting device 2 of the present invention When the LED lighting device 2 of the present invention is installed outside, it may be easily damaged by weather conditions such as rainstorm, animals such as birds or squirrels, or leaves, and the case may emit light 22 from such an external environment. ),
  • the panel 21, the heat dissipation fins 25, and the like can be protected, and many electrical devices not shown in the figure can be protected.
  • the space part 263 is formed therein by the first case 261 and the second case 262.
  • a pipe 28 may be installed in the space part 263, and various pipes connected to the panel 21 may pass through the pipe 28.
  • the first case 261 and / or the second case 262 may further include a plurality of vent holes penetrating through the space part 263, and the heat dissipation fin 25 described above may be formed in the space part 263. It is preferred to extend toward). Therefore, the heat dissipated through the heat dissipation fins 25 can be effectively discharged to the outside through the air through the space portion 263.
  • the inventors used convection of air. That is, as shown in FIGS. 2 and 7, a plurality of first vent holes 271 penetrating toward the ground are formed in the first case 261, and a plurality of second vent holes are formed in the second case 262. 272 is formed. In this case, the second vent 272 is formed at a higher position from the ground than the first vent 271. Accordingly, the cool air introduced into the space 263 from the first vent 271 is heat-exchanged with the heat dissipation fin 25 and the first support 241 and is discharged through the second vent 272 when it is heated. It is. By the convection effect, the heat dissipation effect of the above-described heat dissipation fin 25 and the first support 241 may be further maximized.
  • the sum of the areas of the first through holes 271 may be larger than the sum of the areas of the second through holes 272. In this case, since the amount of cold air introduced from the first vent 271 increases, the convection effect described above can be further maximized.
  • the second vent hole 272 may be formed on the side surface 262a of the second case 262 as shown in FIG. 7, and may be formed on the upper surface of the second case 262 as shown in FIG. 2. In this case, since foreign matter is easily introduced from the outside, the second vent hole 272 is clogged or the space 263 is easily contaminated. However, the present invention is not necessarily limited thereto, and although not shown in the drawings, the second vent hole 272 may be formed on the upper surface of the second case 262.
  • the diffusion plate 29 may be further disposed to face the light emitting unit 22 and the reflecting plate 23.
  • the diffusion plate 29 may be installed in the chassis plate 24 as shown in FIG. 2. It may be coupled to the edge of the first support 241 and the edge of the second support 242.
  • the diffusion plate 29 may not only directly protect the light emitting unit 22, the reflecting plate 23, and the panel 21 from the external environment, but also diffuse the light emitted from the light emitting unit 22 to the ground. Ensure high and even illumination.
  • the diffusion plate 29 may be formed of a material that diffuses light as the material itself, or may diffuse light using a transparent panel in which scattering particles are dispersed.
  • the diffusion plate 29 has a third plane 291 facing the light emitting portion 22 and the reflecting plate 23 and a fourth plane 292 opposite to the third plane 291. And a plurality of first grooves provided to be spaced apart from each other on the third plane 291 or the fourth plane 292 and spaced apart from each other on the third plane 291 or the fourth plane 292. It includes a plurality of second grooves provided to intersect with the first groove, the first groove and the second groove may be provided to be spaced apart from each other.
  • FIG. 8 illustrates one embodiment of such a diffuser plate 29.
  • a plurality of first grooves 293 provided to be spaced apart from each other and a plurality of second grooves 294 provided to be spaced apart from each other are formed on the fourth plane 292.
  • the second grooves 294 are arranged to intersect the first grooves 293, spaced apart from the first grooves 293.
  • the first grooves 293 and the second grooves 294 are respectively formed to be drawn from the fourth plane 292.
  • the diffusion plate 29 is formed of plastic
  • the first grooves 293 and the second grooves 294 are formed by pressing with a heating mold. It can be formed by injection. In the case of pressing and forming a heating mold, the diffusion plate 29 may be formed at a time by pressing into a mold in which patterns of the first grooves 23 and the second grooves 24 are formed.
  • the fourth plane 292 between the first grooves 293 and the fourth plane 292 between the second grooves 294 may form a curved surface.
  • a portion of the fourth plane 292 between the first grooves 293 and the first grooves 293 and a fourth plane 292 between the second grooves 294 and the second grooves 294. Each portion of) may form a lenticular pattern.
  • the first grooves 293 and the second grooves 294 may be formed in the third plane 291. Although not illustrated in the drawings, the first grooves 293 and the second grooves 294 may be formed in both the third plane 291 and the fourth plane 292.
  • the first grooves 293 may be formed in the third plane 291, and the second grooves 294 may be formed in the fourth plane 292, respectively.
  • a portion of the third plane 291 between the first grooves 293 and the first grooves 293 and a fourth plane 292 between the second grooves 294 and the second grooves 294. Each portion of) may form a lenticular pattern.
  • FIG. 10 schematically illustrates a pattern formed by the first grooves 293 and the second grooves 294.
  • all of the first grooves 293 and the second grooves 294 are formed in a regular pattern.
  • the surface of the first surface 21 is formed by the first grooves 293 and the second grooves 294 to have a three-dimensional structure formed such that the bottom thereof has a rectangular shape and the center thereof has a curved surface.
  • the light emitted from the light emitting part 22 is not diffused only in one specific direction but uniformly diffused in the planar direction.
  • an overall uniform diffusion effect can be enhanced.
  • the difference in the diffusion effect may be locally formed by differently forming the distance d1 between the first grooves 293 and the distance d2 between the second grooves 294. As a result, the luminance of the light can also be increased in the direction away from the light emitting portion 22.
  • FIG. 11 is a plan view illustrating a pattern of first grooves 293 'and second grooves 294' according to another exemplary embodiment of the present invention.
  • the first grooves 293 'and the second grooves 294' may be formed to have a curve. Due to the pattern shape of the curve, the shape of the light emitted from the light emitter 22 may be more diversified, and thus the lighting effect may be further increased.
  • both the first grooves 293 ′ and the second grooves 294 ′ are formed in a curved pattern, but the present invention is not limited thereto, and at least one of them may have a curved pattern. Curved patterns can also be formed locally only.
  • first grooves and the second grooves cross each other so as to be perpendicular to each other.
  • first grooves 293 ′′ and the second grooves 294 ′′ may cross each other at an inclination angle ⁇ .
  • the light emitted from the light emitter 22 has a diffusivity and a luminance distribution different from those of the embodiment of FIG.
  • FIG. 13 corresponds to half of the embodiment shown in FIG. 2, and the first case 261 and the second case 262 are coupled to the fixing piece 264.
  • the fixing piece 264 allows the lighting device of the present invention to be installed on a pole or a wall. Other functions are as described above.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

La présente invention concerne un appareil d'éclairage à LED qui présente un éclairage uniforme et augmente les effets de dissipation thermique afin d'améliorer la stabilité. L'appareil d'éclairage à LED comprend : un panneau qui présente une forme plate, le panneau possédant un premier plan et un deuxième plan disposé sur le coté opposé à celui du premier plan ; une pièce émettrice de lumière disposée sur le premier plan du panneau et comprenant une pluralité de composants à LED, la pièce émettrice de lumière possédant une surface émettrice de lumière parallèle au premier plan et inclinée selon un premier angle de telle sorte que la surface émettrice de lumière forme un angle aigu avec le fond ; et une plaque réfléchissante qui s'étend depuis le panneau. La plaque réfléchissante comprend une première portion qui s'étend avec une inclinaison de manière à former avec le fond un deuxième angle qui est plus petit que le premier angle, une deuxième portion s'étendant depuis le panneau avec une inclinaison dans une direction qui s'éloigne du fond et une troisième portion reliant la première portion à la deuxième portion.
PCT/KR2011/006207 2010-11-26 2011-08-23 Appareil d'éclairage à led WO2012070749A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11843076.8A EP2644978B1 (fr) 2010-11-26 2011-08-23 Appareil d'éclairage à led

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100118959A KR101072598B1 (ko) 2010-11-26 2010-11-26 Ｌｅｄ 조명 장치
KR10-2010-0118959 2010-11-26

Publications (2)

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WO2012070749A2 true WO2012070749A2 (fr) 2012-05-31
WO2012070749A3 WO2012070749A3 (fr) 2012-07-19

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PCT/KR2011/006207 WO2012070749A2 (fr) 2010-11-26 2011-08-23 Appareil d'éclairage à led

Country Status (3)

Country Link
EP (1) EP2644978B1 (fr)
KR (1) KR101072598B1 (fr)
WO (1) WO2012070749A2 (fr)

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US11486568B2 (en) * 2020-10-25 2022-11-01 Trolmaster Argo Instruments Co., Limited Lamp radiator, lamp and lamp assembly

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FR3015633A1 (fr) * 2013-12-20 2015-06-26 Al Babtain France Sas Systeme optique, dispositif et lampadaire associes

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Publication number Priority date Publication date Assignee Title
US11486568B2 (en) * 2020-10-25 2022-11-01 Trolmaster Argo Instruments Co., Limited Lamp radiator, lamp and lamp assembly

Also Published As

Publication number Publication date
EP2644978B1 (fr) 2019-11-20
KR101072598B1 (ko) 2011-10-11
EP2644978A4 (fr) 2015-07-01
WO2012070749A3 (fr) 2012-07-19
EP2644978A2 (fr) 2013-10-02

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