CN102969308B - LED (light-emitting diode) lamp structure and packaging method thereof - Google Patents
LED (light-emitting diode) lamp structure and packaging method thereof Download PDFInfo
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- CN102969308B CN102969308B CN201210469094.8A CN201210469094A CN102969308B CN 102969308 B CN102969308 B CN 102969308B CN 201210469094 A CN201210469094 A CN 201210469094A CN 102969308 B CN102969308 B CN 102969308B
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Abstract
The invention discloses an LED (light-emitting diode) lamp structure and a packaging method thereof, which belong to the technical field of illumination. The structure comprises a substrate, at least one LED chip, at least one reflecting cup, packaging glue and a fly-eye lens for sealing the reflecting cup, wherein the at least one reflecting cup is fixed on the substrate; the at least one LED chip is arranged inside each reflecting cup; the packaging glue is filled inside each reflecting cup and covers the LED chips; and the back surface of the fly-eye lens is fixed at the upper surface of the packaging glue, and is coated with fluorescent powder. The LED lamp structure disclosed by the embodiment of the invention separates the chip from the fluorescent powder, and the fly-eye lens, the back of which is coated with the fluorescent powder, is has away from the chip in a certain distance, therefore, the luminous consistency and the luminous efficiency of the LED are improved. Meanwhile, the thickness and the evenness of the fluorescent powder are controlled in a manner of mixing the fluorescent powder with absolute alcohol and then spraying the fluorescent powder on the back of the fly-eye lens, and thus the luminous uniformity of the fluorescent powder is also improved.
Description
Technical field
The invention belongs to lighting technical field, particularly relate to a kind of LED lamp structure and method for packing thereof.
Background technology
LED(Light Emitting Diode, light-emitting diode) there is the plurality of advantages such as volume is little, life-span length, energy-saving and environmental protection, fast response time, be widely used in the fields such as instrument indicator light, instrument backlight, auto lamp.
Prior art adopts a kind of LED lamp structure of floor plan usually, comprises substrate, LED chip, packaging plastic, reflector and lens; Multiple reflector is fixed on substrate, and install at least one LED chip in reflector, packaging plastic and phosphor mixture point are coated on LED chip, and lens are fixed on the top of reflector.
Inventor is realizing in process of the present invention, finds that prior art at least exists following problem:
Accurately cannot control the spot printing thickness of fluorescent material and shape in prior art, be difficult to control its consistency, cause the glow color of each light emission direction of same LEDs chip different; Meanwhile, when fluorescent material being directly coated in LED chip surface, due to the effect of light scattering, make the luminous efficiency of LED chip not high; And thermal resistance also can reduce comparatively greatly the luminous efficiency of LED chip.
Summary of the invention
In order to the spot printing thickness and shape that solve the fluorescent material existed in existing LED lamp structure not easily accurately control, the problem such as the inconsistent and luminous efficiency of glow color is not high, embodiments provide a kind of LED lamp structure and method for packing thereof, described technical scheme is as follows:
On the one hand, embodiments provide a kind of LED lamp structure, described structure comprises substrate, LED chip, reflector and packaging plastic, described substrate is fixed with reflector described at least one, be provided with LED chip described at least one in each described reflector, described packaging plastic to be filled in described reflector and coated described LED chip; Described structure also comprises the fly's-eye lens of reflector described in capping, and the back side of described fly's-eye lens is fixed on the upper surface of described packaging plastic, and the back side of described fly's-eye lens scribbles fluorescent material.
Wherein, the back side of described fly's-eye lens is coated in after the fluorescent material in the embodiment of the present invention mixes with absolute alcohol by the mode sprayed.
Wherein, the back side of the fly's-eye lens in the embodiment of the present invention is planar structure and front is made up of multiple similar miniature toroidal lens.
Wherein, the shape of the micro lens in the embodiment of the present invention is for circle and diameter is less than 1mm.
Further, the thickness of the fly's-eye lens in the embodiment of the present invention is 0.1mm-5mm.
Preferably, the LED lamp structure that the embodiment of the present invention provides also comprises box dam, and described box dam is fixed on the substrate and surrounded described reflector.
Preferably, the LED chip in the embodiment of the present invention is arranged in described reflector with COB packing forms.
On the other hand, the embodiment of the present invention additionally provides a kind of method for packing of aforementioned LED lamp structure, and described method comprises:
A, fluorescent material is dispersed in absolute alcohol, by the back side post-drying of described mixture even application to fly's-eye lens;
B, be arranged on LED chip on substrate reflector in;
C, in reflector, fill packaging plastic, the back side of described fly's-eye lens is fixed on the upper surface of described packaging plastic.
Wherein, the bake out temperature in embodiment of the present invention step a is 80-110 DEG C.
Further, the thickness of the fluorescent material in the embodiment of the present invention is controlled by spray time and/or spray pressure.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is: the embodiment of the present invention have employed the LED lamp structure of a kind of chip and fluorescent material separate type, be placed in distance chip certain position place by fly's-eye lens back being scribbled fluorescent material, improve emission uniformity and the luminous efficiency of LED.The present invention simultaneously crosses thickness and the evenness that the mode spraying to the back side of fly's-eye lens after employing fluorescent material mixes with absolute alcohol controls fluorescent material, improves luminous uniformity.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the LED lamp structure provided in the embodiment of the present invention 1 and embodiment 2;
Fig. 2 is the LED lamp structure schematic appearance provided in the embodiment of the present invention 2;
Fig. 3 is the schematic appearance that the pedestal that provides in the embodiment of the present invention 2 and reflector combine;
Fig. 4 is another schematic appearance that the pedestal that provides in the embodiment of the present invention 2 and reflector combine;
Fig. 5 is the schematic appearance of the fly's-eye lens provided in the embodiment of the present invention 2;
Fig. 6 is another schematic appearance of the fly's-eye lens provided in the embodiment of the present invention 2;
Fig. 7 is the flow chart of the method for packing of the LED lamp structure provided in the embodiment of the present invention 3.
In figure: substrate 1, LED chip 2, reflector 3, packaging plastic 4, box dam 5, fly's-eye lens 6, fluorescent material 7.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment 1
As shown in Figure 1, embodiments provide a kind of LED lamp structure, this LED lamp structure comprises substrate 1, LED chip 2, reflector 3 and packaging plastic 4.Wherein, substrate 1 is fixed with at least one reflector 3, at least one LED chip 2 is installed in each reflector 3, packaging plastic 4 to be filled in reflector 3 and coated LED chip 2, this LED lamp structure also comprises the fly's-eye lens 6 of capping reflector 3, the back side of this fly's-eye lens 6 is fixed on the upper surface of packaging plastic 4, and the back side of this fly's-eye lens 6 scribbles fluorescent material 7.
Particularly, aforesaid fluorescent material mixes the rear back side being coated in fly's-eye lens by the mode sprayed with absolute alcohol.Then in the embodiment of the present invention, the thickness of fluorescent material can be controlled by spray time and/or spray pressure, and namely the thickness of the phosphor powder layer of LED lamp structure that provides of the embodiment of the present invention and the uniformity can accurately control.
The embodiment of the present invention have employed the LED lamp structure of a kind of chip and fluorescent material separate type, is placed in distance chip certain position place, improves emission uniformity and the luminous efficiency of LED by fly's-eye lens back being scribbled fluorescent material.The present invention simultaneously crosses thickness and the evenness that the mode spraying to the back side of fly's-eye lens after employing fluorescent material mixes with absolute alcohol controls fluorescent material, improves luminous uniformity.
Embodiment 2
For ease of the understanding to the present embodiment, simply introduce below in conjunction with Fig. 1-6 LED lamp structure that the present embodiment provides.As depicted in figs. 1 and 2, the LED lamp structure that the embodiment of the present invention provides comprises substrate 1, LED chip 2, reflector 3, packaging plastic 4, box dam 5 and fly's-eye lens 6.Wherein, substrate 1 is fixed with at least one reflector 3, substrate 1 is provided with box dam 5, this box dam 5 surrounds all reflectors 3 in reflector 3 surrounding, at least one LED chip 2 is installed in each reflector 3, packaging plastic 4 to be filled in reflector 3 and coated LED chip 2, and the back side of fly's-eye lens 6 is fixed on the upper surface of packaging plastic 4, and the back side of this fly's-eye lens 6 scribbles fluorescent material 7.
Particularly, aforesaid fluorescent material 7 mixes the rear back side being coated in fly's-eye lens 6 by the mode sprayed with absolute alcohol.So in the embodiment of the present invention, the thickness of fluorescent material 7 can be controlled by spray time and/or spray pressure.
Wherein, see Fig. 2-4, the substrate 1 in the embodiment of the present invention is the flat board with heat conduction function that a kind of metal or pottery are made, and can be square or circular etc.Particularly, the substrate 1 in the embodiment of the present invention adopts circular aluminum substrate.
Wherein, the LED chip 2 in the embodiment of the present invention can be blue-light LED chip, red LED chip or green LED chip etc.Particularly, the LED chip 2 in the embodiment of the present invention adopts blue-light LED chip.
Wherein, the reflector 3 in the embodiment of the present invention has the smooth concave surface for reflecting, and the shape of concave surface is parabola, inner conical surface, hyperboloid or ellipsoid etc.; And this smooth concave surface need do mirror process, mirror process process can be specifically be coated with the reflector such as silver coating or aluminium coated at reflector 3 inner surface.Reflector 3 in the present embodiment has the effect of converged light, can improve luminous efficiency.Further, in the present embodiment, reflector 3 can be directly shaping on a substrate 2.
Particularly, see Fig. 1-4, reflector 3 in the embodiment of the present invention is bowl-type and is distributed on substrate 1 in array, the bottom surface of reflector 3 is planar structure, this planar structure is provided with the electrode for installing LED chip 2, connects with gold thread the installation that the electrode in this planar structure and the electrode on LED chip 2 can complete LED chip 2.
Wherein, the packaging plastic 4 in the embodiment of the present invention is silica gel or epoxy resin etc., not only can improve light emission rate, also have protective effect to LED chip 2 and internal circuit.Particularly, after the packaging plastic 4 in the embodiment of the present invention is full of reflector 3, the upper surface of packaging plastic 4 can be concordant with the top of reflector 3, also can a little more than the top of reflector 3; Then the back side of fly's-eye lens 6 can directly be fixed on the upper surface of packaging plastic 7.
Wherein, see Fig. 1-4, the box dam 5 in the embodiment of the present invention perpendicular to substrate 1 surface and be looped around reflector 3 surrounding formed annular closed.The effect of the box dam 5 in the embodiment of the present invention mainly works to converge light and protection fly's-eye lens 6.Particularly, as shown in Figure 1, Figure 2 and Figure 4, the box dam 5 in the embodiment of the present invention is circular, and adopts two box dam design, and this pair of box dam is concentric ring-shaped.Further, in the present embodiment, box dam 5 can directly molding be on a substrate 2.
Wherein, the embodiment of the present invention adopts fly's-eye lens 6 of the prior art, mainly plays luminous intensity distribution effect, makes the present invention can obtain the high efficiency of light energy utilization and large-area Uniform Illumination.Particularly, as shown in Figure 5 and Figure 6, the back side of the fly's-eye lens 6 in the embodiment of the present invention is planar structure and the front of fly's-eye lens 6 is made up of multiple similar miniature toroidal lens, this miniature fly's-eye lens can be circle, ellipse or parallelogram etc., the embodiment of the present invention does not limit the shape of micro lens, and micro lens can be designed to various shape according to concrete light distribution requirements.According to parameters such as the distances between the size of reflector 3 opening and reflector 3 in the invention process, fly's-eye lens 6 can adopt multiple mounting modes, if reflector 3 aperture area is less, quantity is more, then the plane of whole reflector 3 top composition places a fly's-eye lens 6; If reflector 3 aperture area is comparatively large, negligible amounts, interval is comparatively far away, then can arrange separately a fly's-eye lens 6 in each reflector 3 top planes.
Wherein, as depicted in figs. 1 and 2, the profile of the fly's-eye lens 6 in the embodiment of the present invention be circular and diameter slightly larger than the diameter of box dam 5, whole fly's-eye lens 6 covers the plane of all reflector 3 tops composition.Particularly, as shown in Figure 2 and Figure 5, the thickness of fly's-eye lens 6 is 0.1mm-5mm, and micro lens is for circle and diameter is less than 1mm.
Wherein, fluorescent material 7 in the embodiment of the present invention comprises the fluorescent material such as yellow fluorescent powder or red fluorescence powder, to be coated in the back side of fly's-eye lens 6 after fluorescent material 7 mixes with absolute alcohol by the mode sprayed, the controlled and uniform phosphor powder layer of thickness of a layer thickness after oven dry, can be formed at the back side of fly's-eye lens 6.Particularly, the embodiment of the present invention adopts yellow fluorescent powder and aforesaid blue-light LED chip matching design.
Preferably, the LED chip 2 in the embodiment of the present invention with COB(Chip On Board, chip on board) packing forms is arranged in reflector 3.Wherein, COB encapsulation technology is the common technique in this area, and the embodiment of the present invention is omitted and described in detail.
The embodiment of the present invention have employed the LED lamp structure of a kind of chip and fluorescent material separate type, is placed in distance chip certain position place, improves emission uniformity and the luminous efficiency of LED by fly's-eye lens back being scribbled fluorescent material.The present invention simultaneously crosses thickness and the evenness that the mode spraying to the back side of fly's-eye lens after employing fluorescent material mixes with absolute alcohol controls fluorescent material, improves luminous uniformity.
Embodiment 3
Provide the method for packing of the LED lamp structure that a kind of embodiment 1 and 2 provides in the embodiment of the present invention, as shown in Figure 7, this method for packing comprises:
301, be dispersed in absolute alcohol by fluorescent material, mixture even application fluorescent material and absolute alcohol formed, to the back side of fly's-eye lens, is then dried at 80-110 DEG C of temperature, dries extremely whole alcohol and is evaporated completely.The thickness of the fluorescent material in the embodiment of the present invention can be controlled by spray time and/or spray pressure.
Wherein, the back side of the fly's-eye lens in the embodiment of the present invention is that the front of planar structure and fly's-eye lens is made up of multiple similar miniature toroidal lens, and this miniature fly's-eye lens can be circular, oval or parallelogram etc.
Preferably, the bake out temperature in the embodiment of the present invention is 100 DEG C.
302, LED chip is arranged in the reflector on substrate;
Wherein, the embodiment of the present invention by reflector be array be fixed on substrate, reflector also can be allowed directly shaping on substrate; Then, on the reflector installed surface be fixed on by LED chip, the electrode on LED chip and the counter electrode on installed surface is connected with gold thread.Preferably, the LED chip in the embodiment of the present invention is arranged in reflector with COB packing forms.
303, in reflector, fill packaging plastic, the back side of fly's-eye lens is fixed on the upper surface of packaging plastic.
Wherein, after the packaging plastic in the embodiment of the present invention is full of reflector, the upper surface of packaging plastic can be concordant with the top of reflector, also can a little more than the top of reflector; Then the back side (being coated with fluorescent material) of fly's-eye lens is directly fixed on the upper surface of packaging plastic, fluorescent material can be realized and be separated with LED chip.
The embodiment of the present invention have employed the LED method for packing of a kind of chip and fluorescent material separate type, and the method is placed in distance chip certain position place by fly's-eye lens back being scribbled fluorescent material, improves emission uniformity and the luminous efficiency of LED.The present invention simultaneously crosses thickness and the evenness that the mode spraying to the back side of fly's-eye lens after employing fluorescent material mixes with absolute alcohol controls fluorescent material, improves luminous uniformity.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a LED lamp structure, described structure comprises substrate, LED chip, reflector and packaging plastic, described substrate is fixed with reflector described at least one, be provided with LED chip described at least one in each described reflector, described packaging plastic to be filled in described reflector and coated described LED chip; It is characterized in that, described structure also comprises the fly's-eye lens of reflector described in capping, the back side of described fly's-eye lens is fixed on the upper surface of described packaging plastic, and the back side of described fly's-eye lens scribbles fluorescent material, be coated in the back side of described fly's-eye lens after described fluorescent material mixes with absolute alcohol by the mode sprayed, the back side of described fly's-eye lens is planar structure and front is made up of multiple similar miniature toroidal lens.
2. LED lamp structure according to claim 1, is characterized in that, the shape of described miniature toroidal lens is for circle and diameter is less than 1mm.
3. LED lamp structure according to claim 1, is characterized in that, the thickness of described fly's-eye lens is 0.1mm-5mm.
4. LED lamp structure according to claim 1, is characterized in that, described structure also comprises box dam, and described box dam is fixed on the substrate and surrounded described reflector.
5., according to the arbitrary described LED lamp structure of claim 1-4, it is characterized in that: described LED chip is arranged in described reflector with COB packing forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469094.8A CN102969308B (en) | 2012-11-20 | 2012-11-20 | LED (light-emitting diode) lamp structure and packaging method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469094.8A CN102969308B (en) | 2012-11-20 | 2012-11-20 | LED (light-emitting diode) lamp structure and packaging method thereof |
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| Publication Number | Publication Date |
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| CN102969308A CN102969308A (en) | 2013-03-13 |
| CN102969308B true CN102969308B (en) | 2015-05-20 |
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| CN201210469094.8A Expired - Fee Related CN102969308B (en) | 2012-11-20 | 2012-11-20 | LED (light-emitting diode) lamp structure and packaging method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178197A (en) * | 2013-04-02 | 2013-06-26 | 钟向阳 | Packaging structure of COB (Chip On Board) type LED (Light Emitting Diode) light source |
| CN107607064B (en) * | 2017-09-01 | 2020-09-22 | 华南理工大学 | System and method for detecting coating flatness of LED fluorescent powder glue based on point cloud information |
| CN109346589A (en) * | 2018-10-23 | 2019-02-15 | 杭州倾诺光电科技有限公司 | A kind of package assembling and packaging technology of LED lamp bead |
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| CN101867004A (en) * | 2010-06-07 | 2010-10-20 | 李骋翔 | Light source module based on remote fluorescent powder |
| CN201638850U (en) * | 2010-04-20 | 2010-11-17 | 北京朗波尔光电股份有限公司 | LED lamp with lens filled with fluorescent glue |
| CN101988631A (en) * | 2009-07-31 | 2011-03-23 | 深圳市光峰光电技术有限公司 | LED stage lighting device and method for improving color uniformity of LED stage lighting device |
| CN102169951A (en) * | 2011-01-28 | 2011-08-31 | 晶科电子（广州）有限公司 | LED (Light Emitting Diode) packaging structure for improving light emitting efficiency and manufacturing method thereof |
| CN102214778A (en) * | 2011-05-18 | 2011-10-12 | 五邑大学 | Packaging structure of LED (light-emitting diode) chip and manufacturing method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8092735B2 (en) * | 2006-08-17 | 2012-01-10 | 3M Innovative Properties Company | Method of making a light emitting device having a molded encapsulant |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101988631A (en) * | 2009-07-31 | 2011-03-23 | 深圳市光峰光电技术有限公司 | LED stage lighting device and method for improving color uniformity of LED stage lighting device |
| CN201638850U (en) * | 2010-04-20 | 2010-11-17 | 北京朗波尔光电股份有限公司 | LED lamp with lens filled with fluorescent glue |
| CN101867004A (en) * | 2010-06-07 | 2010-10-20 | 李骋翔 | Light source module based on remote fluorescent powder |
| CN102169951A (en) * | 2011-01-28 | 2011-08-31 | 晶科电子（广州）有限公司 | LED (Light Emitting Diode) packaging structure for improving light emitting efficiency and manufacturing method thereof |
| CN102214778A (en) * | 2011-05-18 | 2011-10-12 | 五邑大学 | Packaging structure of LED (light-emitting diode) chip and manufacturing method thereof |
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