CN103151343A - Light emitting diode (LED) structure with functions of improving light-emitting efficiency and heat dissipation efficiency - Google Patents
Light emitting diode (LED) structure with functions of improving light-emitting efficiency and heat dissipation efficiency Download PDFInfo
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- CN103151343A CN103151343A CN2013100586899A CN201310058689A CN103151343A CN 103151343 A CN103151343 A CN 103151343A CN 2013100586899 A CN2013100586899 A CN 2013100586899A CN 201310058689 A CN201310058689 A CN 201310058689A CN 103151343 A CN103151343 A CN 103151343A
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Abstract
The invention relates to a light emitting diode (LED) structure with functions of improving light-emitting efficiency and heat dissipation efficiency; the LED structure comprises a plurality of LED chips, a substrate, a first colloid and a second colloid, wherein the substrate is provided with a groove, and the LED chips are arranged in the groove; the substrate and a lens are in butt joint; the first colloid is arranged between the groove and the LED chips; the second colloid is arranged between the lens and the first colloid; the first colloid, the second colloid and the LED chips are covered in the groove; the substrate and the lens are combined into a whole; and due to the arrangement of the first colloid and the second colloid, the whole light-emitting efficiency is effectively improved, and the heat dissipation efficiency is effectively increased.
Description
This case is that application number is: 201010114537.2, the applying date is: 2010.2.12, denomination of invention are: the dividing an application of " having light emitting diode construction and LED light fixture that luminous and radiating efficiency is promoted ".
Technical field
The invention relates to a kind of light emitting diode construction and LED light fixture thereof, especially a kind of seeing through between the groove and plural LED chip that one first colloid is located at a substrate, and one second colloid is located at lens of this substrate docking and the combination between the first colloid designs, and makes having of the whole light extraction efficiency of effective increase and radiating efficiency is luminous and radiating efficiency is promoted light emitting diode construction and LED light fixture thereof.
Background technology
In recent years, along with light-emitting diode (Light-emittingdiode, hereinafter to be referred as LED) emerging Lighting Industry development is rapidly, LED has been surpassed or near the energy-conserving light source of conventional bulb at aspects such as brightness, power, life-span, power consumption, reaction rates, so that LED begins to replace conventional bulb at present gradually, wherein with great power LED a large amount of extensive uses already in fields such as street lamp, view, Xi Qiang, room lightings.
And be 5 watts (W) in the maximum power of releasing on the market single high-power LED chip at present, and in the high-power applications such as street lamp field, normally the LED of up to a hundred great power LEDs or thousands of 0.1 watt (W) left and right low-power encapsulation combines and forms a LED module, reach required luminous flux and illumination, but it is larger that the size of relative LED module needs, and its required radiator structure design is more complicated, and then has directly limited its range of application.
In addition, because single LEDs packaging thermal resistance can be accomplished less than every watt of 12 degree Celsius, but the thermal resistance of the aforementioned LED module because of plural LEDs after integrated but is difficult to control, make interior each LED chip of LED module under working for a long time, because of aforementioned thermal resistance can't be stable control, surpass allowed band and damage the performance of LED chip and shorten the life-span with the junction temperature that causes LED chip, as the luminous efficiency of LED chip reduce, emission wavelength shortens etc.In addition, due to the point-source of light that disperses, the external optical design when giving concrete the application can bring great difficulty, so that be difficult to obtain a desirable beam distribution.
And, because in the LED light fixture being utilizes the described LED module of plurality of LEDs integrated chip to obtain paying close attention to widely and using as light source, though and its have simple for structure, the heat conduction interface is few, light-emitting area is little and concentrated and be easy to the advantages such as luminous intensity distribution design; But because the thermal power density of LED module is large, easily there is the effect of heat build-up to be difficult to solve, therefore the LED light fixture need be considered the radiating management of LED module, and the LED module needs different luminous intensity distributions in various application scenario, as install secondary light-distribution lens additional on commonly used LED light fixture, satisfy design requirement with the luminous energy that allows whole LED light fixture be sent, but extend another problem, i.e. light reflection or scattering meeting on the outside interface of LED module and the inner interface of light-distribution lens affects the light extraction efficiency of LED light fixture.
The above, have following shortcoming in known techniques:
1. poor heat radiation;
2. light extraction efficiency is not good;
3. area of dissipation is limited.
Therefore, because above-mentionedly commonly use every shortcoming that product derive, the inventor of this case exhausts its intelligence then, to be engaged in the sector experience for many years, concentrate on studies and innovated improvement, finally successfully this part case that " has light emitting diode construction and LED light fixture thereof that luminous and radiating efficiency is promoted " is completed in research and development, is the creation that a tool effect is promoted in fact.
Summary of the invention
Therefore, for effectively solving the above problems, main purpose of the present invention, be to provide between a kind of groove and plural LED chip that is located at a substrate by one first colloid, and one second colloid is located at lens of this substrate docking and the combination between the first colloid designs, and gets effectively to promote the light emitting diode construction that having of whole bright dipping (or luminous) efficient and radiating efficiency is luminous and radiating efficiency is promoted.
Secondary objective of the present invention is to provide a kind of LED light fixture of promoting light extraction efficiency and improving radiating effect that has.
Secondary objective of the present invention is to provide a kind of LED light fixture that increases area of dissipation that has.
For reaching above-mentioned purpose, the present invention proposes a kind of light emitting diode construction luminous and that radiating efficiency is promoted that has, and it comprises: plural LED chip; One substrate has a groove, and this groove has been installed with this LED (Light-emitting diode) chip, and these substrate docking one lens; One first colloid is provided in a side of between this groove and aforementioned LED chip; And one second colloid is located between these lens and the first colloid, and described the first colloid and the second colloid and this LED chip are to be coated in this groove, and integrally combine with this substrate and lens, also this is by the design that integrally combines of substrate of the present invention, lens, LED chip and first and second colloid, making not only effectively increases radiating efficiency, more and then effectively increases (or lifting) light extraction efficiency.
the present invention separately proposes a kind of light emitting diode construction luminous and that radiating efficiency is promoted that has, this light emitting diode construction comprises plural LED chip, one substrate, one first colloid and one second colloid, wherein this substrate end-face is provided with at least one framework, this framework defines a groove to each other, this groove is to be installed with aforementioned LED chip, and these substrate docking one lens, and this first colloid is provided in a side of in this groove and coat this LED chip, this second colloid is located between these lens and the first colloid, and its position is located on this framework and the first colloid, and described this framework of lens cover cap, to integrally combine with this substrate, so by aforementioned first, two colloids are effectively promoted whole light extraction efficiency and radiating efficiency.
a kind of LED light fixture of the another proposition of the present invention, to comprise a LED module, one pedestal and a heat radiation module, this LED module comprises plural LED chip, one substrate, one first colloid and one second colloid, wherein this substrate has a groove and is installed with plural LED chip, and these substrate docking one lens, this first colloid is provided in a side of between aforementioned grooves and LED chip, this second colloid is located between these lens and the first colloid, and aforementioned pedestal has a storage tank, this storage tank has been installed with the LED module, aforementioned heat radiation module has plural this pedestal of heat pipe cross-under, so by this first, two colloids not only can increase outside whole bright dipping and radiating efficiency, these heat pipes be can see through again and integral heat sink area and radiating effect increased.
Description of drawings
Fig. 1 is the generalized section of the first preferred embodiment of the present invention;
Fig. 2 is the tridimensional schematic diagram of the first preferred embodiment of the present invention;
Fig. 3 is the enforcement aspect schematic diagram of the first preferred embodiment of the present invention;
Fig. 4 is the generalized section of the second preferred embodiment of the present invention;
Fig. 5 is another generalized section of the second preferred embodiment of the present invention;
Fig. 6 is the pedestal vertical view of the 3rd preferred embodiment of the present invention;
Fig. 7 is the generalized section of the 4th preferred embodiment of the present invention.
Description of reference numerals:
The 1-LED module; The 10-LED chip; The 11-substrate; The 111-groove; 112-the first holding part; 113-the second holding part; The 115-framework; The 13-lens; 131-the first protrusion; 132-the second protrusion; The 133-recess; The 14-cover plate; The 141-press part; The 142-perforation; The 2-LED light fixture; The 3-fixture; 41-the first colloid; 42-the second colloid; The 5-pedestal; The 51-pore; The 52-storage tank; The 53-radiating fin; The 55-convection holes; The 56-circuit; The 6-module that dispels the heat; The 61-heat pipe; The 8-lamp casing; The 9-threaded portion.
Embodiment
Characteristic on the present invention's above-mentioned purpose and structure thereof and function will be explained according to appended graphic preferred embodiment.
see also Fig. 1, 2, shown in 3, it has shown respectively have light emitting diode construction and LED light fixture thereof luminous and that radiating efficiency is promoted of the present invention, in the first preferred embodiment of the present invention, this light emitting diode construction comprises plural LED (Light-emitting diode, light-emitting diode, be called for short LED) chip 10, one substrate 11, one first colloid 41 and one second colloid 42, aforesaid base plate 11 is made with the fine copper material, and it has a groove 111, this groove 111 has been installed with aforementioned LED chip 10, one this substrate 11 of lens 13 docking and cover cap are located above the groove 111 of this substrate 11, together with closely subsides are touched with this substrate 11, the material of these lens 13 is to be chosen as silica gel, silicones, optics PC, glass and acrylic are wherein arbitrary, another person, the refractive index of aforementioned lens 13 is less than this first and second colloid 41,42 refractive index.
Aforementioned the first colloid 41 is to be silica gel, and it is provided in a side of 10 of this groove 111 and this LED chips, to utilize himself characteristic of silica gel can effectively keep original high transmission rate and the transparency to visible spectrum, and reduced the variations in refractive index in the light path, and then help to promote the whole light extraction efficiency of LED light fixture 2, as improving LED light fixture 2 efficient 10 ﹪ ~ 20 ﹪.
Aforementioned the second colloid 42 is to be chosen as transparent silica gel and cooling fluid is wherein arbitrary, if this second colloid 42 is the radiating effect that increases light emitting diode construction integral body during for cooling fluid, with the temperature of effective reduction LED chip 10; If in order to improving the distributing homogeneity of colour temperature (color temperature) on different rising angles of the white light that LED chip 10 sends, and the refractive index of described transparent silica gel is less than 1.43 during for transparent silica gel for this second colloid 42.In addition, in this preferred embodiment, this second colloid 42 is to explain with transparent silica gel, but is not limited to this, explanation hereby.
Aforementioned the second colloid 42 is located between these lens 13 and the first colloid 41, and be coated in this groove 111 with this first colloid 41 and this LED chip 10, and then integrally combine with this substrate 11 and lens 13 and consist of a LED module 1 (being described light emitting diode construction).
Please consult again shown in Fig. 1,2,3, aforementioned LED light fixture 2 comprises described LED module 1, a pedestal 5 and a heat radiation module 6, this pedestal 5 is made with pure copper material, its material is purity greater than 99.9% copper, and at the copper electroplate, and this pedestal 5 has a storage tank 52 in order to being installed with this LED module 1, and with surface mount (or adhesion) technology (Surface Mounting Technolegy, be called for short SMT), make this LED module 1 be combined into one with this pedestal 5.
And aforementioned heat radiation module 6 has plural heat pipe 61, these these pedestals 5 of heat pipe 61 cross-under, so that the heat that LED module 1 produces conducts to these heat pipes 61 via this pedestal 5, then guides to heat exchange with outside by these heat pipes 61, effectively to reach excellent radiating effect.
These each heat pipes 61 dock respectively these each pores 51, and are communicated with respectively this pore 51 and storage tank 52; Be provided with one the 3rd colloid (not shown) in aforementioned storage tank 52, the 3rd colloid is to be silica gel, it is immersed between these pores 51 and aforementioned heat pipe 61, so that the 3rd colloid infiltrates to this heat pipe 61 respectively from respectively this pore 51 in this storage tank 52, to increase the contact area of the 3rd colloid and this pedestal 5, with the effective thermal resistance of effective reduction LED module 1 in the heat dissipation path in front, and then enlarge heat transfer area.
See also shown in Fig. 1,3, aforementioned heat pipe 61 more connects a lamp casing 8, and then be combined into one with aforementioned pedestal 5, when aforementioned LED module 1 sends visible light, follow the light source of LED chip 10 to produce heat, wherein aforementioned light source is sequentially by this first colloid 41, the second colloid 42, and by aforementioned first and second colloid 41,42 self characteristics, increase luminous efficiency, and at aforementioned light source by after this second colloid 42, via these lens 13, light source projects is gone out the external world;
The heat that these LED chips 10 produce, the 3rd colloid that sees through in this storage tank 52 guides to aforementioned heat respectively on described heat pipe 61 and pedestal 5, make the part heat be transmitted to heat radiation on this pedestal 5, but the heat of the overwhelming majority is transmitted on this lamp casing 8 by these heat pipes 61, dispel the heat to see through larger area of dissipation, effectively promote the light extraction efficiency of LED light fixture 2 integral body, and then reach excellent radiating effect.
see also Fig. 4, shown in 5, it is the second preferred embodiment of the present invention, this light emitting diode construction comprises plural LED (Light-emitting diode, be called for short LED) chip 10, one substrate 11, one first colloid 41 and one second colloid 42, aforesaid base plate 11 end faces are provided with at least one framework 115(preferably, be provided with two or more frameworks 115) made by epoxy resin, this framework 115 defines a groove 111 to each other, this groove 111 has been installed with aforementioned LED chip 10, and these substrate 11 docking one are wavy lens 13, these lens 13 cover caps also coat the framework 115 of this substrate 11, and together with closely subsides are touched with this substrate 11, wherein the material of these lens 13 is that to be chosen as silica gel, silicones, optics PC, glass and acrylic wherein arbitrary.
Aforementioned the first colloid 41 is to be silica gel, and its refractive index by the characteristic of silica gel, except keeping original high transmission rate to visible spectrum and the transparency, and has reduced the variations in refractive index in the light path between 1.43 to 1.58; This first colloid 41 is to adopt the mode of die casting (Molding) to be formed on this LED chip 10 of the interior coating of this groove 111.
This second colloid 42 is to be transparent silica gel, in order to improve the distributing homogeneity of colour temperature (color temperature) on different rising angles of the white light that LED chip 10 sends, and the refractive index of described transparent silica gel is less than 1.43, as use fresnel formula and calculate, when normal incidence, according to aforementioned fresnel formula, the reflectance of natural daylight by
n=n
2/ n
1Calculate.
And LED glue face refractive index 1.5
1.58, air refraction n
2≈ 1.0, lens 13 refractive indexes 1.48
1.6; After above-mentioned calculating, the refractive index n of described the second colloid 42 as can be known
4≈ 1.4.
Aforementioned the second colloid 42 is located between these lens 13 and the first colloid 41, and the position is located on this framework 115 and the first colloid 41, be that aforementioned the second colloid 42 is to adopt the mode of die casting (Molding) to locate on being formed on the first colloid 41, and just be positioned at the central position of framework 115, and aforementioned this framework 115 of lens 13 cover caps, to integrally combine with this substrate 11, to consist of a LED module 1 (being described light emitting diode construction).
Please consult again shown in Fig. 4,5, these lens 13 are relative these grooves 111, and have one first protrusion 131 and one second protrusion 132, form a recess 133 between this first protrusion 131 and the second protrusion 132; And aforesaid base plate 11 is to be installed on a pedestal 5 of being made by aluminium, and the fixed form between described substrate 11 and pedestal 5, is to adopt surface mounting technology (Surface Mounting Technology is called for short SMT); And be embedded with at least one circuit 56 in aforementioned pedestal 5, and an end of this each circuit 56 is electrically connected respectively this substrate 11, and its other end is electrically connected to this pedestal 5.
Be fixed on (not shown) on a LED light fixture with this pedestal 5 is accommodating, when the LED chip 10 of described LED module 1 sends light source, aforementioned light source is sequentially by this first colloid 41, the second colloid 42, and by aforementioned first and second colloid 41,42 characteristic, increase luminous efficiency, and at aforementioned light source by after this second colloid 42, by these lens 13, light source projects is gone out the external world, with colour temperature and the colour developing coefficient of effective raising output white light, and then the improving extraction efficiency person.
see also Fig. 4, shown in 6, it is the 3rd preferred embodiment of the present invention, this preferred embodiment is roughly identical with front the second preferred embodiment, do not give unnecessary details mutually in addition at this and exist together, the difference of the 3rd preferred embodiment be in: aforementioned pedestal 5 has more plurality of radiating fins 53 and a storage tank 52, these radiating fins 53 are stretched formation from all epitaxial lateral overgrowths of this pedestal 5, and define convection holes 55 between each radiating fin 53, and aforementioned storage tank 52 is to be installed with for described LED module 1, when sending light source, aforementioned LED chip 10 follows the generation of heat, absorb aforementioned heat by this pedestal 5, and conduct to these radiating fins 53, and then the fluid by this convection holes 55 and outside carries out the heat exchange heat radiation and makes LED module 1 maintain better work temperature low (i.e. lower working temperature), with effective promoting luminous efficiency and radiating effect.
See also shown in Figure 7, it is the 4th preferred embodiment of the present invention, this preferred embodiment is roughly identical with front the second preferred embodiment, do not give unnecessary details mutually in addition at this and exist together, the 4th preferred embodiment difference be in: the end face of aforementioned pedestal 5 opposite these substrates 11 is provided with a threaded portion 9, affixed this pedestal 5 of one end of this threaded portion 9, the LED light fixture (not shown) that its free end is corresponding with coupling locks together; And an end of aforementioned each circuit 56 is electrically connected respectively this substrate 11, and the other end of each circuit 56 is electrically connected with these threaded portion 9 one ends and the other end thereof respectively mutually.
The above, the present invention is a kind of have light emitting diode construction and LED light fixture thereof luminous and that radiating efficiency is promoted, it has following advantages:
1. has lifting bright dipping (or luminous) efficient;
2. has improving radiating effect;
3. have the colour temperature and the colour developing coefficient that improve the output white light;
4. has the increase area of dissipation.
The above is only preferred embodiment of the present invention, and feature of the present invention is not limited to this, any those skilled in the art in field of the present invention, can think easily and variation or modification, all should be encompassed in following claim of the present invention.
Claims (11)
1. one kind has light emitting diode construction luminous and that radiating efficiency is promoted, it is characterized in that, comprising:
The plural number LED chip;
One substrate, its end face is provided with at least one framework, and each framework defines a groove to each other being installed with described LED chip, and these substrate docking one lens;
One first colloid is located at and coats this LED chip in this groove; And
One second colloid is located between these lens and this first colloid, and locates on being positioned at this framework and the first colloid, and aforementioned this framework of lens cover cap, to integrally combine with this substrate.
2. according to claim 1 have a light emitting diode construction that luminous and radiating efficiency is promoted, and wherein these lens have one first protrusion and one second protrusion, and this first protrusion and the second protrusion form a recess to each other, relatively this groove.
3. according to claim 1 have a light emitting diode construction that luminous and radiating efficiency is promoted, wherein, also comprise a pedestal, this substrate is to be installed on this pedestal, be embedded with at least one circuit in this pedestal, an end of each circuit is electrically connected respectively this substrate.
4. according to claim 3 have a light emitting diode construction that luminous and radiating efficiency is promoted, wherein the end face of opposite this substrate of this pedestal is provided with a threaded portion, affixed this pedestal of one end of this threaded portion, its free end is in order to locking together with the LED light fixture, and the other end of each described circuit is electrically connected with described threaded portion one end and the other end thereof respectively.
5. according to claim 3 have a light emitting diode construction that luminous and radiating efficiency is promoted, and wherein this pedestal also has plurality of radiating fins and stretches formation from all epitaxial lateral overgrowths of this pedestal, and defines convection holes between each radiating fin.
6. according to claim 2 have a light emitting diode construction that luminous and radiating efficiency is promoted, and wherein the shape of these lens is to be wavy.
7. according to claim 3 have a light emitting diode construction that luminous and radiating efficiency is promoted, and is wherein the fixed form that adopts surface mounting technology between this substrate and pedestal.
8. according to claim 1 have a light emitting diode construction that luminous and radiating efficiency is promoted, and wherein this first colloid is to be silica gel.
9. according to claim 8 have a light emitting diode construction that luminous and radiating efficiency is promoted, and wherein the refractive index of this silica gel is between 1.43 to 1.58.
10. according to claim 1 have a light emitting diode construction that luminous and radiating efficiency is promoted, and wherein this second colloid is transparent silica gel.
11. according to claim 1 have a light emitting diode construction that luminous and radiating efficiency is promoted, wherein the material of these lens is that silica gel, silicones, optics PC, glass and acrylic are wherein arbitrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100586899A CN103151343A (en) | 2010-02-12 | 2010-02-12 | Light emitting diode (LED) structure with functions of improving light-emitting efficiency and heat dissipation efficiency |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100586899A CN103151343A (en) | 2010-02-12 | 2010-02-12 | Light emitting diode (LED) structure with functions of improving light-emitting efficiency and heat dissipation efficiency |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101145372A Division CN102157503A (en) | 2010-02-12 | 2010-02-12 | Light-emitting diode structure capable of emitting light and enhancing heat radiation efficiency and LED (light-emitting diode) lamp |
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| CN103151343A true CN103151343A (en) | 2013-06-12 |
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Cited By (1)
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| CN104505454A (en) * | 2014-12-06 | 2015-04-08 | 深圳市格天光电有限公司 | Crystal-coated COB (chip on board) light source with high luminous efficiency for streetlamp and production process for crystal-coated COB light source |
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Application publication date: 20130612 |