CN102969308A - 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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- CN102969308A CN102969308A CN2012104690948A CN201210469094A CN102969308A CN 102969308 A CN102969308 A CN 102969308A CN 2012104690948 A CN2012104690948 A CN 2012104690948A CN 201210469094 A CN201210469094 A CN 201210469094A CN 102969308 A CN102969308 A CN 102969308A
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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 modulated structure and method for packing thereof.
Background technology
LED(Light Emitting Diode, light-emitting diode) have 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 modulated structure of floor plan usually, comprises substrate, led chip, packaging plastic, reflector and lens; A plurality of reflectors are fixed on the substrate, and at least one led chip is installed in the reflector, and packaging plastic and phosphor mixture point are coated on the led chip, and lens are fixed on the top of reflector.
The inventor finds that there is following problem at least in prior art in realizing process of the present invention:
Can't accurately control spot printing thickness and the shape of fluorescent material in the prior art, be difficult to its consistency of control, cause the glow color difference of each light emission direction of same LEDs chip; Simultaneously, when fluorescent material directly is coated in the led chip surface, because the effect of light scattering makes the luminous efficiency of led chip not high; And thermal resistance also can reduce greatly the luminous efficiency of led chip.
Summary of the invention
For problems such as the spot printing thickness that solves the fluorescent material that exists in the existing LED modulated structure are difficult for accurately controlling with shape, glow color is inconsistent and luminous efficiency is not high, the embodiment of the invention provides a kind of LED modulated structure and method for packing thereof, and described technical scheme is as follows:
On the one hand, the embodiment of the invention provides a kind of LED modulated structure, described structure comprises substrate, led chip, reflector and packaging plastic, be fixed with at least one described reflector on the described substrate, at least one described led chip is installed in each described reflector, and described packaging plastic is filled in the described reflector and coats described led chip; Described structure also comprises the fly's-eye lens of the described reflector of 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, be coated in the back side of described fly's-eye lens after the fluorescent material in the embodiment of the invention mixes with absolute alcohol by the mode of spraying.
Wherein, the back side of the fly's-eye lens in the embodiment of the invention is that planar structure and front are comprised of a plurality of similar miniature toroidal lenss.
Wherein, the micro lens in the embodiment of the invention is shaped as circle and diameter less than 1mm.
Further, the thickness of the fly's-eye lens in the embodiment of the invention is 0.1mm-5mm.
Preferably, the LED modulated structure that the embodiment of the invention provides also comprises box dam, and described box dam is fixed on the described substrate and surrounds described reflector.
Preferably, the led chip in the embodiment of the invention is installed in the described reflector with the COB packing forms.
On the other hand, the embodiment of the invention also provides a kind of method for packing of aforementioned LED modulated structure, and described method comprises:
A, fluorescent material is dispersed in the absolute alcohol, described mixture is evenly sprayed to the back side post-drying of fly's-eye lens;
B, led chip is installed in the reflector on the substrate;
C, in reflector, fill with 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 among the embodiment of the invention step a is 80-110 ℃.
Further, the thickness of the fluorescent material in the embodiment of the invention is controlled by spray time and/or spray pressure.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: the embodiment of the invention has adopted the LED modulated structure of a kind of chip and fluorescent material separate type, place apart from chip certain position place by the fly's-eye lens that the back is scribbled fluorescent material, improved luminous consistency and the luminous efficiency of LED.The mode that sprays to the back side of fly's-eye lens after simultaneously the present invention crosses and adopts fluorescent material and absolute alcohol mixes is controlled thickness and the evenness of fluorescent material, has improved luminous uniformity.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the LED modulated structure that provides among the embodiment of the invention 1 and the embodiment 2;
Fig. 2 is the LED modulated structure schematic appearance that provides in the embodiment of the invention 2;
Fig. 3 is the schematic appearance of the pedestal that provides in the embodiment of the invention 2 and reflector combination;
Fig. 4 is another schematic appearance of the pedestal that provides in the embodiment of the invention 2 and reflector combination;
Fig. 5 is the schematic appearance of the fly's-eye lens that provides in the embodiment of the invention 2;
Fig. 6 is another schematic appearance of the fly's-eye lens that provides in the embodiment of the invention 2;
Fig. 7 is the flow chart of the method for packing of the LED modulated structure that provides in the embodiment of the invention 3.
Among the 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 purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1, the embodiment of the invention provides a kind of LED modulated structure, and this LED modulated structure comprises substrate 1, led chip 2, reflector 3 and packaging plastic 4.Wherein, be fixed with at least one reflector 3 on the substrate 1, at least one led chip 2 is installed in each reflector 3, packaging plastic 4 is filled in the reflector 3 and coats led chip 2, this LED modulated 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, be coated in the back side of fly's-eye lens after aforesaid fluorescent material mixes with absolute alcohol by the mode of spraying.Then the thickness of fluorescent material can be controlled by spray time and/or spray pressure in the embodiment of the invention, and namely thickness and the uniformity of the phosphor powder layer of the LED modulated structure that provides of the embodiment of the invention can accurately be controlled.
The embodiment of the invention has adopted the LED modulated structure of a kind of chip and fluorescent material separate type, places apart from chip certain position place by the fly's-eye lens that the back is scribbled fluorescent material, has improved luminous consistency and the luminous efficiency of LED.The mode that sprays to the back side of fly's-eye lens after simultaneously the present invention crosses and adopts fluorescent material and absolute alcohol mixes is controlled thickness and the evenness of fluorescent material, has improved luminous uniformity.
For ease of the understanding to present embodiment, simply introduce the LED modulated structure that present embodiment provides below in conjunction with Fig. 1-6.As depicted in figs. 1 and 2, the LED modulated structure that provides of the embodiment of the invention comprises substrate 1, led chip 2, reflector 3, packaging plastic 4, box dam 5 and fly's-eye lens 6.Wherein, be fixed with at least one reflector 3 on the substrate 1, substrate 1 is provided with box dam 5, this box dam 5 surrounds all reflectors 3 around reflector 3, at least one led chip 2 is installed in each reflector 3, packaging plastic 4 is filled in the reflector 3 and coats 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, be coated in the back side of fly's-eye lens 6 after aforesaid fluorescent material 7 mixes with absolute alcohol by the mode of spraying.The thickness of fluorescent material 7 can be controlled by spray time and/or spray pressure in the embodiment of the invention so.
Wherein, referring to Fig. 2-4, the substrate 1 in the embodiment of the invention is a kind of metal or the flat board with heat conduction function made of pottery, can be square or circular etc.Particularly, the substrate in the embodiment of the invention 1 adopts the circular aluminum substrate.
Wherein, the led chip in the embodiment of the invention 2 can be blue-light LED chip, red LED chip or green light LED chip etc.Particularly, the led chip in the embodiment of the invention 2 adopts blue-light LED chip.
Wherein, the reflector 3 in the embodiment of the invention has the smooth concave surface for reflection, concave surface be shaped as parabola, inner conical surface, hyperboloid or ellipsoid etc.; And this smooth concave surface need be done mirror process, and the mirror process process specifically can be to be coated with the reflector such as silver coating or aluminium coated at reflector 3 inner surfaces.Reflector 3 in the present embodiment has the effect of converging light, can improve luminous efficiency.Further, directly moulding on substrate 2 of reflector 3 in the present embodiment.
Particularly, referring to Fig. 1-4, reflector 3 in the embodiment of the invention is for the bowl type and be array and be distributed on the substrate 1, the bottom surface of reflector 3 is planar structure, this planar structure is provided with for the electrode that led chip 2 is installed, and connects the installation that electrode on this planar structure and the electrode on the led chip 2 can be finished led chip 2 with gold thread.
Wherein, the packaging plastic 4 in the embodiment of the invention is silica gel or epoxy resin etc., not only can improve light emission rate, also led chip 2 and internal circuit is had protective effect.Particularly, after the packaging plastic 4 in the embodiment of the invention was full of reflector 3, the upper surface of packaging plastic 4 can be concordant with the top of reflector 3, also can be 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, referring to Fig. 1-4, the box dam 5 in the embodiment of the invention perpendicular to the surface of substrate 1 and be looped around reflector 3 around form annular closed.The effect of the box dam 5 in the embodiment of the invention mainly works to converge light and protection fly's-eye lens 6.Particularly, such as Fig. 1, Fig. 2 and shown in Figure 4, the box dam 5 in the embodiment of the invention is circular, and adopts two box dam designs, and this pair box dam is concentric ring-shaped.Further, box dam 5 can directly be molded on the substrate 2 in the present embodiment.
Wherein, the embodiment of the invention adopts fly's-eye lens 6 of the prior art, mainly plays the 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 invention is planar structure and the front of fly's-eye lens 6 is comprised of a plurality of similar miniature toroidal lenss, this miniature fly's-eye lens can be circle, ellipse or parallelogram etc., the embodiment of the invention does not limit the shape of micro lens, and micro lens can be designed to according to concrete light distribution requirements various shapes.In the invention process according to the size of reflector 3 openings and the parameters such as distance between the reflector 3, fly's-eye lens 6 can adopt multiple mounting modes, if reflector 3 aperture areas are less, quantity is more, and then a fly's-eye lens 6 is placed on the plane that forms, whole reflector 3 tops; If reflector 3 aperture areas are larger, negligible amounts, the interval is far away, then can a fly's-eye lens 6 be set separately 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 invention be circle and slightly larger in diameter in the diameter of box dam 5, whole fly's-eye lens 6 covers the plane that all reflector 3 tops form.Particularly, such as Fig. 2 and shown in Figure 5, the thickness of fly's-eye lens 6 is 0.1mm-5mm, and micro lens is that circle and diameter are less than 1mm.
Wherein, fluorescent material 7 in the embodiment of the invention comprises the fluorescent material such as yellow fluorescent powder or red fluorescence powder, mode by spraying after fluorescent material 7 mixes with absolute alcohol is coated in the back side of fly's-eye lens 6, can form at the back side of fly's-eye lens 6 phosphor powder layer of the controlled and even thickness of a layer thickness after the oven dry.Particularly, the embodiment of the invention adopts yellow fluorescent powder and aforesaid blue-light LED chip matching design.
Preferably, the led chip 2 in the embodiment of the invention is with COB(Chip On Board, chip on board) packing forms is installed in the reflector 3.Wherein, the COB encapsulation technology is the common technique in this area, and the embodiment of the invention is omitted and described in detail.
The embodiment of the invention has adopted the LED modulated structure of a kind of chip and fluorescent material separate type, places apart from chip certain position place by the fly's-eye lens that the back is scribbled fluorescent material, has improved luminous consistency and the luminous efficiency of LED.The mode that sprays to the back side of fly's-eye lens after simultaneously the present invention crosses and adopts fluorescent material and absolute alcohol mixes is controlled thickness and the evenness of fluorescent material, has improved luminous uniformity.
The method for packing of the LED modulated structure that a kind of embodiment 1 and 2 provides is provided in the embodiment of the invention, and as shown in Figure 7, this method for packing comprises:
301, fluorescent material is dispersed in the absolute alcohol, the mixture that fluorescent material and absolute alcohol are formed evenly sprays to the back side of fly's-eye lens, then dries under 80-110 ℃ of temperature, and oven dry to whole alcohol are evaporated completely and get final product.The thickness of the fluorescent material in the embodiment of the 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 invention is planar structure and the front of fly's-eye lens is comprised of a plurality of similar miniature toroidal lenss, and this miniature fly's-eye lens can be circular, ellipse or parallelogram etc.
Preferably, the bake out temperature in the embodiment of the invention is 100 ℃.
302, led chip is installed in the reflector on the substrate;
Wherein, the embodiment of the invention is fixed on reflector on the substrate with being array, also can allow directly moulding on substrate of reflector; Then on the reflector installed surface that led chip is fixed on, with the electrode on the gold thread connection led chip and the counter electrode on the installed surface.Preferably, the led chip in the embodiment of the invention is installed in the reflector with the COB packing forms.
303, in reflector, fill with 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 invention was full of reflector, the upper surface of packaging plastic can be concordant with the top of reflector, also can be a little more than the top of reflector; Then the back side (being coated with fluorescent material) with fly's-eye lens directly is fixed on the upper surface of packaging plastic, can realize that fluorescent material separates with led chip.
The embodiment of the invention has adopted the LED lamp method for packing of a kind of chip and fluorescent material separate type, and the method places apart from chip certain position place by the fly's-eye lens that the back is scribbled fluorescent material, has improved luminous consistency and the luminous efficiency of LED.The mode that sprays to the back side of fly's-eye lens after simultaneously the present invention crosses and adopts fluorescent material and absolute alcohol mixes is controlled thickness and the evenness of fluorescent material, has improved luminous uniformity.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. LED modulated structure, described structure comprises substrate, led chip, reflector and packaging plastic, be fixed with at least one described reflector on the described substrate, at least one described led chip is installed in each described reflector, and described packaging plastic is filled in the described reflector and coats described led chip; It is characterized in that described structure also comprises the fly's-eye lens of the described reflector of 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.
2. LED modulated structure according to claim 1 is characterized in that, is coated in the back side of described fly's-eye lens after described fluorescent material mixes with absolute alcohol by the mode of spraying.
3. LED modulated structure according to claim 1 is characterized in that, the back side of described fly's-eye lens is that planar structure and front are comprised of a plurality of similar miniature toroidal lenss.
4. LED modulated structure according to claim 3 is characterized in that, described micro lens be shaped as circle and diameter less than 1mm.
5. LED modulated structure according to claim 3 is characterized in that, the thickness of described fly's-eye lens is 0.1mm-5mm.
6. LED modulated structure according to claim 1 is characterized in that, described structure also comprises box dam, and described box dam is fixed on the described substrate and surrounds described reflector.
7. arbitrary described LED modulated structure according to claim 1-6, it is characterized in that: described led chip is installed in the described reflector with the COB packing forms.
8. such as the method for packing of right 1 described LED modulated structure, it is characterized in that: described method comprises:
A, fluorescent material is dispersed in the absolute alcohol, described mixture is evenly sprayed to the back side post-drying of fly's-eye lens;
B, led chip is installed in the reflector on the substrate;
C, in reflector, fill with packaging plastic, the back side of described fly's-eye lens is fixed on the upper surface of described packaging plastic.
9. method for packing according to claim 8, it is characterized in that: the bake out temperature among the step a is 80-110 ℃.
10. method for packing according to claim 8, it is characterized in that: the thickness of described fluorescent material is controlled by spray time and/or spray pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210469094.8A CN102969308B (en) | 2012-11-20 | 2012-11-20 | LED (light-emitting diode) lamp structure and packaging method thereof |
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| CN201210469094.8A CN102969308B (en) | 2012-11-20 | 2012-11-20 | LED (light-emitting diode) lamp structure and packaging method thereof |
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| CN102969308B CN102969308B (en) | 2015-05-20 |
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| 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 |
| CN107607064A (en) * | 2017-09-01 | 2018-01-19 | 华南理工大学 | LED fluorescent powder glue coating planeness detection system and method based on a 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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| 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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