WO2016208824A1

WO2016208824A1 - Cob lighting device having improved light-distribution, illuminance, and heat -dissipation efficiency

Info

Publication number: WO2016208824A1
Application number: PCT/KR2015/012779
Authority: WO
Inventors: 조정기
Original assignee: (주)두영티앤에스
Priority date: 2015-06-25
Filing date: 2015-11-26
Publication date: 2016-12-29
Also published as: KR20170000976A; EP3315855A4; EP3315855A1; CN208107995U

Abstract

The present invention relates to a COB lighting device having improved light-distribution, illuminance, and heat-dissipation efficiency that: can reflect emitted light with a reflective plate to prevent glare caused by direct rays of the light; can allow the light travelling forwards from the reflector to have travel paths similar to each other to minimize the amount of light leaked out of an illuminated area, thereby improving luminous intensity; and can allow the light to be uniformly supplied without being limited to one point, the COB lighting device comprising: a polygonal prismatic heat-dissipation rod having a thermal conductor formed on at least one of the inside and the outside thereof; a plurality of lighting modules attached to the outer circumferential surface of the heat-dissipation rod in the longitudinal direction, each of which has a plurality of lighting elements arranged in a line; a reflector having the shape of a container that is open at an opposite end thereof, wherein the heat-dissipation rod is fixedly inserted into the central portion of the reflector, and the reflector has a plurality of planar reflective plates that are formed such that side surfaces thereof continually make contact with each other; a heat-dissipation plate assembly that makes contact with an end portion of the heat-dissipation rod and releases, to the outside, heat conducted from the heat-dissipation rod; and a stabilizer provided on a side of the heat-dissipation plate assembly to supply power to the lighting modules.

Description

COB lighting device with improved light distribution, illuminance and heat dissipation

The present invention relates to a COB lighting apparatus with improved light distribution, illuminance, and heat dissipation efficiency, wherein the irradiated light is reflected by the reflecting plate to prevent glare by direct irradiation of light, and the trajectory of light irradiated in front of the reflector By having a similar trajectory to each other, it is possible to improve the brightness by minimizing the amount of light lost to the outside of the irradiation area, and to improve the light distribution, illuminance, and heat dissipation efficiency of COB lighting device that enables even light irradiation without being biased at one point. It is about.

The lighting device is a device for supplying light from the light source, and various kinds of light sources include incandescent lamps, fluorescent lamps and halogen lamps. Recently, lighting devices using LED as a light source that can minimize maintenance costs with energy saving and long life have been in the spotlight.

However, lighting devices using LED as a light source have disadvantages associated with heat dissipation. About 15% of the LED's energy is converted to light, and the rest is generated from thermal energy. As a result, in LED lighting devices, LEDs can overheat and directly affect LED performance.

That is, overheating of the LED causes color shift and low light output, and there are problems such as attenuation of the amount of light and shortened useful life.

In addition, in the case of heat dissipation by installing a heat dissipation rod in the LED, since the heat dissipation rod is made of a metal material, there is a problem that the insulation treatment must be separately performed for the LED. Accordingly, there is a problem that the heat dissipation performance of the heat dissipation rod is lowered due to the insulation treatment.

In order to solve this problem, a chip on board (COB) type LED has been developed in which SMD (Surface Mount Device) type LED is soldered and installed as a separate element to minimize heat generation by minimizing the resistance of a circuit junction. . Since COB LEDs generate less heat than SMD LEDs, a large number of LEDs can be formed on a substrate, and a special transparent silicon film can be formed to provide excellent insulation performance, thereby increasing the degree of integration to achieve high brightness. There was a problem that does not completely eliminate fever.

On the other hand, even in the case of a COB type LED, there is a problem that the amount of light is concentrated at a specific point because it does not solve the straightness peculiar to the LED and do not efficiently disperse the light emitted from the lighting device.

Therefore, in the COB type LED lighting device, it is necessary to develop a lighting device that is excellent in heat dissipation performance and can evenly distribute and concentrate irradiated light.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) KR10-0997172 B1

(Patent Document 2) KR10-2011-0108269 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a COB lighting apparatus having improved light distribution, illuminance, and heat dissipation efficiency, in which irradiated light is reflected on a reflecting plate and irradiated to prevent glare caused by direct irradiation of light.

In addition, the present invention, the trajectory of the light irradiated in front of the reflection shade has a similar trajectory, thereby minimizing the amount of light lost to the outside of the irradiation area to improve the light intensity and illuminance and heat radiation efficiency is improved The purpose is to provide a COB lighting device.

In addition, an object of the present invention is to provide a COB lighting apparatus having improved light distribution, illuminance, and heat dissipation efficiency, capable of irradiating even light without being biased at one point.

The COB lighting apparatus having improved light distribution, illuminance and heat dissipation efficiency according to the present invention includes a heat dissipation rod having a polygonal pillar shape having a heat conductor formed on at least one portion of an inner side or an outer side; A plurality of lighting modules arranged in a row and attached to the outer circumference of the heat dissipation rod in a longitudinal direction; A reflection shade formed in a container shape having the other end opened, the heat dissipation rod being inserted into and fixed to a central portion thereof, and the plurality of plate-shaped reflecting plates continuously contacting each other; A heat sink assembly in contact with an end of the heat sink to dissipate heat conducted from the heat sink to the outside; And a ballast provided on one side of the heat sink assembly to supply power to the lighting module.

In addition, in the COB lighting apparatus having improved light distribution, illuminance, and heat dissipation efficiency, the reflector includes a first reflector and a second reflector that is bent and extended from the other end of the first reflector.

In addition, in the COB lighting apparatus having improved light distribution, illuminance and heat dissipation efficiency, the angle of the second reflecting plate with respect to the longitudinal direction of the heat dissipation bar is greater than that of the first reflecting plate with respect to the longitudinal direction of the heat dissipation bar. Is made smaller.

In addition, in the COB lighting apparatus having improved light distribution, illuminance and heat dissipation efficiency according to the present invention, the first reflecting plate has a length projected on a longitudinal line of the heat dissipation rod longer than the illumination module.

In addition, the COB lighting apparatus having improved light distribution, illuminance and heat dissipation efficiency according to the present invention includes a plurality of heat dissipation bars inside the heat dissipation rods to absorb heat generated from the light module and transmit the heat to the heat dissipation plate assembly.

In addition, the COB lighting apparatus with improved light distribution, illuminance and heat dissipation efficiency according to the present invention, the heat sink assembly, the heat sink is the other end is formed flat; A plurality of heat pipes inserted from a side surface of the heat sink and extending outwardly; And a plurality of heat dissipating plates through which the heat pipe is inserted and having a through portion contacting at least one outer circumference of the heat pipe, wherein the heat pipe has one outer circumference exposed to the outside outside the other end of the heat sink. Contact with the heat dissipation rod.

In addition, in the COB lighting apparatus having improved light distribution, illuminance, and heat dissipation efficiency, the heat pipe is inserted through the heat sink from different directions or from different positions.

According to the present invention, since the illumination module emits light in a direction perpendicular to the longitudinal direction of the heat dissipation rod or a part diffused from the vertical direction, and the irradiated light is reflected on the reflecting plate and irradiated, the glare by direct irradiation of light There is an effect that can be prevented.

In addition, the present invention, the light emitted from the lighting module is bent from the first reflecting plate and the first reflecting plate is extended by, but is reflected by the second reflecting plate formed at a smaller angle than the first reflecting plate, the light irradiated in front of the reflector The trajectories of s have similar trajectories, and thus the luminous intensity can be improved by minimizing the amount of light lost outside the irradiation area.

In addition, since the light is irradiated by the plurality of lighting modules and the reflecting plate corresponding to the number of lighting modules, the present invention has the effect of being able to irradiate even light without being biased at one point.

1 is a perspective view of a COB lighting apparatus having improved light distribution, illuminance, and heat dissipation efficiency according to an embodiment of the present invention;

2 is an exploded perspective view of a COB lighting apparatus having improved light distribution, illuminance, and heat dissipation efficiency according to an embodiment of the present invention;

3 is a side view and a cross-sectional view of a COB lighting apparatus having improved light distribution, illuminance, and heat dissipation efficiency according to an embodiment of the present invention;

Figure 4 is an exemplary view of the mounting of the lighting module of the COB lighting apparatus is improved light distribution and illuminance and heat dissipation efficiency according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

According to the present invention, a heat radiation rod 100 having a polygonal column shape in which a heat conductor is formed on at least one of the inner side and the outer side, and a plurality of lighting elements are arranged in a line, and is formed in the longitudinal direction on the outer circumference of the heat radiation rod 100. A plurality of lighting modules 200 and the other end is formed in a container shape, the other end is opened, the heat dissipation rod 100 is inserted and fixed to the center portion, the plurality of plate-shaped reflector plate 310 is formed so as to continuously contact each other side The reflection shade 300, the heat dissipation assembly 400 in contact with the end of the heat dissipation rod 100 to radiate heat conducted from the heat dissipation rod 100 to the outside, and is provided on one side of the heat dissipation assembly assembly 400, the illumination module 200 It is configured to include a ballast 500 for supplying power.

The heat dissipation rod 100 has a polygonal column shape and a cross section cut perpendicular to the longitudinal direction has a regular polygonal shape, preferably a regular hexagonal shape, and is made of a material having high thermal conductivity. The heat dissipation rod 100 is preferably formed of an aluminum material, but may be made of metal such as gold, silver, tungsten, copper, etc. One or more of various materials having high thermal conductivity other than metal may be selectively applied.

On the outer circumference of the heat dissipation rod 100, a plurality of lighting modules 200 are installed in the longitudinal direction of the heat dissipation rod 100. Therefore, the heat generating rod 100 absorbs heat generated from the lighting module 200 and transfers the heat generated by the heat dissipation rod 100 to the heat dissipation plate assembly 400, thereby preventing the light efficiency of the lighting module 200 from being lowered and the life of the light module 200 due to heat generation.

Inside the heat dissipation rod 100, a plurality of heat dissipation holes are formed. In the present invention, although three heat radiation holes are formed, but not limited thereto, two, four, or more heat radiation holes may be formed. The heat dissipation hole 110 is installed in the heat dissipation hole. The heat dissipation bar 110 is made of a material having excellent thermal conductivity, and serves to quickly conduct heat absorbed by the heat dissipation rod 100 to the heat dissipation plate assembly 400.

On the other hand, the heat dissipation rod 110 is bent at one end of the heat dissipation rod 100 to form the same surface as one end of the heat dissipation rod 100, it is preferable to be exposed to the outside of one end of the heat dissipation rod 100, through The heat sink 410 of the heat sink assembly 400 can be more effective heat transfer.

Such a heat dissipation rod 100 and the heat dissipation rod 110 is preferably coupled by interference fit, and by applying a thermal grease or the like between the heat dissipation rod 100 and the heat dissipation rod 110 to ensure stable thermal conductivity. Can be.

In addition, a cover hole 101 is formed in the center of the heat dissipation rod 100, and a cover 120 is installed in the cover hole 101 to form a beautiful appearance and at the same time, the light reflected from the reflection shade 300 is not diffusely reflected. It can be reflected in a specific direction. The lower portion of the cover 120 is formed with a coupling protrusion 121, the coupling protrusion 121 is forcibly fitted into the cover hole 101 is coupled.

The lighting module 200 includes a plurality of lighting elements 210 arranged in a row, and is a COB (Chip On Board) type, in which a plurality of LEDs 210 are arranged on a straight stripe-shaped substrate. . A plurality of such lighting module 200 is attached to the outer periphery of the heat dissipation rod 100 in the longitudinal direction of the heat dissipation rod 100. At this time, the outer periphery of the heat dissipation rod 100 is further provided with a ceramic plate to insulate the lighting module 200 from the heat dissipation rod 100, and to effectively transfer the heat of the lighting module 200 to the heat dissipation rod 100. Can be. When the ceramic plate is provided, the ceramic plate is attached to the outer periphery of the heat dissipation rod 100 by the number of the lighting module 200, it can be installed by attaching the lighting module 200 to the ceramic plate.

The lighting module 200 is provided to be attached to each side of the heat radiation rod 100 is a polygonal pillar, when the heat dissipation rod 100 is formed in a hexagonal shape is also provided 16 of the lighting module 200. . In addition, each of the lighting module 200, the lighting element 210, that is, the LED 210 is arranged, it is possible to adjust the number and the number of columns of the LED 210 according to the desired brightness, such as one column, two columns, three columns. .

The reflection shade 300 is formed in a container shape with the other end opened, and the heat dissipation rod 100 is inserted into and fixed to the center portion. The reflector 300 serves to reflect the light emitted from the lighting module 200 and irradiate through the opening, and for this purpose, a plurality of plate-shaped reflecting plates 310 provided with the number of the lighting modules 200 may mutually face each other. It is formed to be in continuous contact. In addition, the reflection shade housing 320 may be further provided on the outside of the reflection shade 300 to surround the outer surface of the reflection shade 300 so as to protect the reflection shade 300 from an external impact.

The reflecting plate 310 is composed of a first reflecting plate 311 and a second reflecting plate 312 bent and extended from the other end of the first reflecting plate 311, and one end of the first reflecting plate 311 is a heat dissipation rod 100. Directly coupled to the outer circumference of the) or connected to the heat dissipation rod insert 313 is inserted into the heat dissipation rod 100. When the plurality of reflecting plates 310 are formed to be in contact with each other, the reflecting plate 310 is preferably formed such that its width becomes wider from one end to the other end so as to form a container shape.

The reflector 310 has a smaller angle formed by the second reflector 312 with respect to the longitudinal direction of the heat dissipation rod 100 than an angle between the first reflector 311 and the longitudinal direction of the heat dissipation rod 100. It is preferably formed. This is a configuration for irradiating light to form an angle as small as possible in the longitudinal direction of the heat dissipation rod 100 when the light emitted from the lighting module 200 to the opening of the reflector 300, further from the first reflecting plate 311 It is configured to reflect light by bending at a large angle.

On the other hand, the light emitted from the lighting module 200 is diffused at a predetermined angle and is emitted, the length of the first reflecting plate 311 in order to reflect the light diffused in the longitudinal direction from the lighting module 200 to the front of the opening It is formed longer than the length of 200. Preferably, the length when the first reflecting plate 311 is projected on the longitudinal line of the heat dissipation bar 100 is formed longer than the illumination module 200.

By the configuration of the reflector 310, the light emitted from the illumination module 200 is first reflected by the first reflector 311, and at this time, the light reflected at an angle that is too large with respect to the longitudinal direction of the heat radiation rod 100. The second reflecting plate 311 is bent from the first reflecting plate 311 can be irradiated in the direction of the opening of the reflector 300 while forming a smaller angle in the longitudinal direction of the heat radiation rod 100. In addition, the light diffused at an angle outside the first reflecting plate 311 among the light emitted from the lighting module 200 is directly reflected by the second reflecting plate 312, where the angle diffused from the lighting module 200 is sufficiently sufficient. Because of the size, the angle reflected by the second reflecting plate 312 can take an angle that is sufficiently small with respect to the longitudinal direction of the heat dissipation rod 100.

Therefore, since all light emitted from the lighting module 200 is irradiated after being reflected by the reflector 310, glare is prevented, and the trajectories of the light irradiated to the front of the reflector 300 do not differ greatly from each other. By minimizing the light lost outside the area it is possible to secure a higher amount of light. In addition, since the number of reflecting plates 310 corresponds to the number of lighting modules 200 in a ratio of 1: 1, the ratio and the angle at which the light emitted from each lighting module 200 is reflected on each reflecting plate 310 are equal to each other. It is possible to obtain even luminance without biasing this particular point.

On the other hand, the angle formed by the first reflecting plate 311 and the second reflecting plate 312 with respect to the longitudinal direction of the heat dissipation rod 100, and the length of the first reflecting plate 311 and the second reflecting plate 312, respectively, It can be selectively applied according to the range. For example, when the amount of light is to be concentrated in a narrow irradiation area, the angle formed by the first reflecting plate 311 with respect to the longitudinal direction of the heat sink 100 is very large, while the second reflecting plate 312 is a heat sink ( The angle formed with respect to the longitudinal direction of the 100 is very small, so that when the light reflected by the first reflecting plate 311 is within the range of the second reflecting plate 312 forming the same reflecting plate 310, the second reflecting plate 312 may be used. By reflecting back to the inside to concentrate the light amount in the center, through which can be a narrow and far illumination device. As another example, when the amount of light is to be concentrated in a large irradiation area, the angle formed by the first reflecting plate 311 with respect to the longitudinal direction of the heat dissipating rod 100 is very small, and the second reflecting plate 312 is the heat dissipating rod 100. By making the angle made with respect to the longitudinal direction very large, the light reflected by the 1st reflector 311 is reflected back to the 2nd reflector 312 which comprises another reflector 310, but the reflecting angle is directed toward the exterior of a reflector. This can be a wide and close lighting device. In addition, the reflective shades having various angles of the various reflecting plates may be superimposed and used as necessary. The angle of the reflecting plate 310 may be a diffusion angle of the LED 210 of the lighting module 200 and a first reflecting plate ( 311) and the second reflector 312 may be determined according to the calculated result.

The heat sink assembly 400 includes a heat sink 410 having the other end flat, a plurality of heat pipes 420 inserted from the side surfaces of the heat sink 410 and extending outwards, and a heat pipe 420. Is inserted through, the through portion is configured to include a plurality of heat sink 430 is in contact with the outer circumference of any one or more of the heat pipe (420).

The heat sink 410 is fixed to the heat pipe 420, and serves to transfer the heat of the heat dissipation rod 100 to the heat pipe 420, for this purpose, the other end of the metal is formed flat to form a flat surface It is configured to contact one end of the heat radiation rod (100).

The heat sink 410 is a heat pipe 420 is inserted from the side, the outer peripheral side of the inserted heat pipe 420 is configured to be exposed to the outside of the other end of the heat sink 410. This is a configuration for receiving heat directly from the heat dissipation rod 100 or the heat dissipation rod 110, and complements a portion in which the heat dissipation rod 100 or the heat dissipation rod 110 and the heat pipe 420 are not in direct contact. The other end of the heat sink is in contact with the heat radiation rod (100). Thermal grease is applied between the other end of the heat sink 410 and one end of the heat dissipation rod 100 to assist heat transfer at a spaced apart portion.

The heat pipe 420 is formed to be inserted from the side of the heat sink 410 and to extend to the outside. The heat pipe 420 is a form in which a heat transfer medium is filled inside a pipe such as copper, which enables rapid heat transfer, and may be formed of a metal rod such as copper, silver, aluminum, or the like without a heat transfer medium.

The heat pipe 420 is preferably one outer peripheral edge of the portion inserted into the heat sink 410 is exposed to the outside of the other end of the heat sink 410, the heat dissipation rod 100 or the heat dissipation rod 110 on the exposed portion ) May be in direct contact. To this end, the heat pipe 420 is formed in a flat shape, and the exposed portion of the heat pipe 420 and the other end of the heat sink are configured to form a plane.

Meanwhile, the heat pipe 420 is configured to penetrate through the plurality of heat sinks 430. At this time, the outer periphery of the heat pipe 420 is in contact with the heat sink 430, so that the heat conducted through the heat pipe 420 is transmitted to the heat sink 430 to be discharged into the air through the heat sink 430. . In addition, a plurality of heat pipes 420 may be provided to pass through different points of the heat sink 430, and may be configured to penetrate from different directions of the heat sink 430.

In addition, all the heat pipes 420 passing through the heat sink 430 may be in contact with the heat sink 430, but all heat is applied to all the heat sinks 430 due to the characteristics of the heat pipes that are sequentially passed through the plurality of heat sinks 430. When the pipes 420 are in contact with each other, the heat dissipation phenomenon occurs on the outer heat sink 430, thereby preventing effective heat dissipation. Therefore, it is preferable that any one of the heat pipes 420 is selectively in contact with the heat sink 430, and then the other heat pipes 420 are not in contact with the heat sink 430 but not in contact with the previous heat sink 430. Do.

The heat dissipation plate 430 is formed of a metal plate having a high thermal conductivity such as copper or aluminum, and is configured in groups so as to face each other with a plurality of spaced apart. The heat pipe 420 penetrates the heat sink 430, and an outer circumference of at least one of the heat pipes 420 is in contact with the heat sink 430.

In order to prevent damage to the heat sink 430, the protection plate is provided to face the heat sink 430 while being spaced apart from the heat sink 430. Each of the heat sinks 430 may be provided on both outer sides of the group, and may be directly fixed to the heat sinks 430 or fixed to the reflection shade 300.

The ballast 500 serves to supply electrical energy required for the lighting module 200 to operate. To this end, the ballast 500 is located on one side of the heat sink 430, preferably the other end of the heat sink 430, the heat generated from the ballast 500 reduces the heat radiation efficiency of the heat sink 430 or the heat sink The heat emitted from the 430 is provided to be spaced apart from the heat sink 430 so as not to reduce the operating efficiency of the ballast 500.

According to the present invention having the above-described configuration, the lighting module 200 emits light in a direction perpendicular to the longitudinal direction of the heat dissipation rod 100 or in a direction partially spread from the vertical direction, and the irradiated light reflects the reflection plate ( Since it is reflected back to 310, it is possible to prevent glare by direct irradiation of light.

In addition, according to the present invention, the light emitted from the lighting module 200 is bent and extended from the first reflecting plate 311 and the first reflecting plate 311, the first formed at a smaller angle than the first reflecting plate 311 2 is reflected by the reflector 312, the trajectory of the light irradiated in front of the reflection shade 300 has a similar trajectory, thereby minimizing the amount of light lost to the outside of the irradiation area to improve the brightness There is.

In addition, according to the present invention, since the light is irradiated by the plurality of lighting modules 200 and the reflecting plate 310 corresponding to the number of the lighting module 200, evenly uneven light irradiation There is a possible effect.

[Description of the code]

100: heat dissipation rod 110: heat dissipation rod

200: lighting module 210: LED

300: reflection shade 310: reflector

311: First Reflector 312: Second Reflector

400 heat sink assembly 410 heat sink

420: heat pipe 430: heat sink

500: ballast

Claims

A heat radiation rod having a polygonal column shape in which a heat conductor is formed on at least one portion of an inner side or an outer side;

A plurality of lighting modules are arranged in a row arranged, the plurality of lighting modules attached to the outer periphery of the heat dissipation rod in the longitudinal direction;

A reflection shade formed in a container shape having the other end opened, the heat dissipation rod being inserted into and fixed to a central portion thereof, and the plurality of plate-shaped reflecting plates continuously contacting each other;

A heat sink assembly in contact with an end of the heat sink to dissipate heat conducted from the heat sink to the outside;

A ballast provided at one side of the heat sink assembly to supply power to the lighting module;

Light distribution and illumination including a improved heat radiation efficiency COB lighting device.
The method of claim 1,

The reflector includes a first reflector and a second reflector that is bent and extended from the other end of the first reflector.
The method of claim 2,

The light distribution, light intensity and heat radiation efficiency of the COB lighting apparatus is improved in that the angle formed by the second reflector with respect to the longitudinal direction of the heat radiation rod is smaller than the angle formed by the first reflector with respect to the longitudinal direction of the heat sink.
The method of claim 3, wherein

The first reflecting plate is a COB lighting apparatus having improved light distribution, illuminance and heat dissipation efficiency, the length of which is projected on the longitudinal line of the heat dissipation rod is longer than the illumination module.
The method of claim 4, wherein

Light distribution, light intensity and heat dissipation efficiency is improved COB lighting apparatus is provided with a plurality of heat dissipation rods on the inside of the heat dissipation rod to absorb the heat generated by the lighting module to the heat sink assembly.
The method of claim 5,

The heat sink assembly,

A heat sink having the other end flat;

A plurality of heat pipes inserted from a side surface of the heat sink and extending outwardly;

A plurality of heat sinks through which the heat pipe is inserted, the through parts of which are in contact with an outer circumference of at least one of the heat pipes;

Including,

The heat pipe is a COB lighting apparatus is improved light distribution, roughness and heat dissipation efficiency is exposed to the heat dissipation bar by the outer peripheral side of the one side is exposed to the outside outside the other end of the heat sink.
The method of claim 6,

The heat pipe is COB lighting apparatus is improved light distribution, roughness and heat dissipation efficiency is inserted through the heat pipe from different directions or from different positions of the heat sink.