CN202817028U

CN202817028U - Double-layer LED packaging lens

Info

Publication number: CN202817028U
Application number: CN 201220451900
Authority: CN
Inventors: 卢志荣
Original assignee: Shenzhen Haotian Optoelectronics Co ltd
Current assignee: Shenzhen Haotian Optoelectronics Co ltd
Priority date: 2012-09-06
Filing date: 2012-09-06
Publication date: 2013-03-20
Anticipated expiration: 2022-09-06

Abstract

The utility model discloses a double-layer LED packaging lens, comprising a first lens and a second lens disposed outside the first lens. A gap is reserved to fill in fluorescent glue between the first lens and the second lens. The gap is filled with the fluorescent glue to form a fluorescent layer. The double-layer LED packaging lens makes dosage of the fluorescent glue, thickness of the fluorescent layer, and shape of the fluorescent layer can be accurately controlled, and meanwhile makes fluorescent powders be far away from an LED chip. The double-layer LED packaging lens solves technical problems of large LED light attenuation, nonuniform light spots, low luminous efficiency and excitation efficiency, and color temperature is easy to deviate, etc., and improves lighting effect of LEDs and uniformity of light spots.

Description

A kind of double-deck LED package lens

Technical field

The utility model relates to a kind of LED lens, specifically a kind of double-deck LED package lens.

Background technology

Light-emitting diode (Light Emitting Diode; LED) have the characteristics such as power saving, light and handy and life-span be long, the semiconductor lighting product of use LED is the environmental protection and energy saving product that present country widelys popularize, and market and application prospect are boundless.At present, the encapsulating structure of semiconductor lighting product is directly fluorescent glue to be covered on the led chip surface, the luminous monochromatic light with not absorbed by fluorescent material of monochromatic light excitated fluorescent powder that sends by led chip mixes and produces white light, covers lens to improve the light extraction efficiency of LED again.The temperature when but led chip is luminous is very high, because fluorescent material directly overlays on the led chip surface in traditional LED encapsulating structure, the high temperature of chip causes the fluorescent material sharp-decay.On the other hand, fluorescent glue is directly to put on led chip by the mode of a glue now, and make fluorescent glue cover led chip, but owing to the flowability of colloid makes the finally shaped shape of fluorescent glue and highly is difficult to control, so the fluorescent coating that usually forms is irregular convex, as shown in Figure 4, fluorescent coating 100 is the thin irregular convex in thick both sides, top, so the monochromatic ability difference that fluorescent material all directions absorption chip sends is too large, caused the hot spot non-uniform phenomenon, colour temperature also is easy to occur deviation, and light extraction efficiency is limited; Also have a bit is exactly that launching efficiency is not high because fluorescent material is directly put on chip, and the area that is stimulated of fluorescent material is very little.

The utility model content

Large for the LED light decay that exists in the prior art, color spot is inhomogeneous, the technical problems such as deviation, light extraction efficiency and launching efficiency are low appear in colour temperature easily, the purpose of this utility model is to provide that a kind of LED of allowing product light decay diminishes, hot spot evenly, colour temperature is not easy the high LED lens of deviation, light extraction efficiency and launching efficiency.

In order to reach above-mentioned technical purpose, the utility model uses following technical scheme:

A kind of double-deck LED package lens comprises first lens and is nested with the second lens outside first lens, is reserved with the gap of filling fluorescent glue between described first lens and the second lens, fills up fluorescent glue in the described gap and forms fluorescence coating.

Beneficial effect: the utility model replaces traditional fluorescent glue point glue mode by the method that shifts fluorescent coating, make fluorescent material away from led chip, reduced on the one hand light decay, prolong the useful life of LED, increase on the other hand the area that is stimulated of fluorescent material, thereby improved its launching efficiency; With respect to traditional fluorescent glue point glue mode, because the utility model can accurately be controlled size and the shape thereof of fluorescent coating, thereby the consumption of fluorescent glue, the thickness of fluorescence coating and the shape of fluorescence coating have accurately been controlled, increased substantially the hot spot uniformity of LED, avoided " yellow circle " or " blue circle " phenomenon, make colour temperature be not easy to occur deviation, and improved the light extraction efficiency of LED.

Preferably, described fluorescence coating is the fluorescence coating of even thickness.

Preferably, described the second lens bottom part ring is established an annular fixed head, evenly be provided with a plurality of locating notches on the described annular fixed head, the locating clamp plate that the protruding a plurality of and described locating notch in described first lens bottom is complementary is fixed first lens and the second lens position thereby described locating clamp plate is installed in the locating notch.

Preferably, be provided with alignment pin on the described locating clamp plate.

Preferably, the main body of described first lens, the second lens can be the semiellipsoid of the hemisphere of hollow shape, hollow shape or the hollow body of saddle.

Preferably, the thickness of described fluorescence coating at 0.5mm between the 2mm.

Preferably, the thickness of described fluorescence coating is 1.0mm or 1.5mm.

Preferably, described alignment pin is stair-stepping cylinder.

Preferably, the refractive index of described first lens is less than the refractive index of the second lens.

Description of drawings

Fig. 1 is STRUCTURE DECOMPOSITION schematic diagram of the present utility model.

Fig. 2 is assembly structure schematic diagram of the present utility model.

Fig. 3 is internal structure schematic diagram of the present utility model.

Fig. 4 is the structural representation of prior art.

Embodiment

For further detailed elaboration the technical solution of the utility model, be elaborated below in conjunction with embodiment and accompanying drawing.

Such as Fig. 1, shown in 2, the utility model discloses a kind of double-deck LED package lens, comprise first lens 1 and be nested with the second lens 2 outside first lens 1, the second lens 2 bottom part ring are established an annular fixed head 3, evenly be provided with locating notch 3a on the annular fixed

head

3,3b, 3c, 3d, protruding and the described locating notch 3a in first lens bottom, 3b, 3c, the locating clamp plate 4a that 3d is complementary, 4b, 4c, 4d, locating

clamp plate

4a, 4b, 4c, 4d is installed in locating

notch

3a, 3b, 3c, in the 3d, thereby first lens 1 and the second lens 2 location is fixing, locating

clamp plate

4a, 4b, 4c, be provided with alignment pin 6a on the 4d, 6b, 6c, 6d, described

alignment pin

6a, 6b, 6c, 6d is stair-stepping cylinder, its first order ladder is that diameter is 3mm, height is the cylinder of 1mm, second level ladder is that diameter is 2mm, and height is the cylinder of 1.5mm; Can make the utility model accurately cover on led chip and be not easy displacement in when encapsulation by

alignment pin

6a, 6b, 6c, 6d.

The main body 10 of first lens 1, the main body 20 of the second lens 2 can take different shapes according to the luminous intensity distribution demand of reality, as being the hemisphere of hollow shape, the semiellipsoid of hollow shape or the hollow body of saddle, be the hemisphere of hollow shape as shown in Figure 1 and Figure 2.

As shown in Figure 3, after first lens 1 and the second lens 2 are fixed, in the gap between fluorescent glue injection first lens 1 and the second lens 2, formation fluorescence coating 5(or elder generation are placed on fluorescent glue in the second lens 2, then

first lens

1 and 2 combinations of the second lens, the compressing of 1 pair of the second lens 2 of first lens forms fluorescence coating 5 during by combination).Fluorescence coating 5 is the fluorescence coating of even thickness, the thickness of fluorescence coating 5 between 0.5mm ~ 2mm, preferred 1.0mm or 1.5mm.

With respect to the LED of conventional point glue mode, because the utility model has uniform fluorescence coating 5, so in encapsulation, can directly omit traditional some glue step.Because fluorescence coating of the present utility model 5 away from led chip, so reduced on the one hand light decay, prolongs the useful life of LED, increased on the other hand the area that is stimulated of fluorescent material, thereby improved its launching efficiency.With respect to traditional fluorescent glue point glue mode, because the size of fluorescence coating 5 of the present utility model and shape are determined, the size and shape of fluorescence coating 5 can not be difficult to control, thereby increased substantially the hot spot uniformity of LED, avoided " yellow circle " or " blue circle " phenomenon, make colour temperature be not easy to occur deviation, and improved the light extraction efficiency of LED.

In addition, the refractive index of first lens 1 of the present utility model is less than the refractive index of the second lens 2, thereby further improved the light extraction efficiency of LED.

Above-described embodiment is the better execution mode of the utility model; but the novel execution mode of this use is not restricted to the described embodiments; anyly do not deviate from the change done under Spirit Essence of the present utility model and the principle, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.

Claims

1. a double-deck LED package lens is characterized in that, comprises first lens and is nested with the second lens outside first lens, is reserved with the gap of filling fluorescent glue between described first lens and the second lens, fills up fluorescent glue in the described gap and forms fluorescence coating.

2. a kind of double-deck LED package lens according to claim 1, it is characterized in that: described fluorescence coating is the fluorescence coating of even thickness.

3. a kind of double-deck LED package lens according to claim 2, it is characterized in that: described the second lens bottom part ring is established an annular fixed head, evenly be provided with a plurality of locating notches on the described annular fixed head, the locating clamp plate that the protruding a plurality of and described locating notch in described first lens bottom is complementary, described locating clamp plate is installed in the locating notch first lens and the second lens position is fixed.

4. a kind of double-deck LED package lens according to claim 3 is characterized in that: be provided with alignment pin on the described locating clamp plate.

5. a kind of double-deck LED package lens according to claim 4, it is characterized in that: the lens body of described first lens, the second lens is the semiellipsoid of the hemisphere of hollow shape, hollow shape or the hollow body of saddle.

6. according to claim 1 to 5 each described a kind of double-deck LED package lens, it is characterized in that: the thickness of described fluorescence coating at 0.5mm between the 2mm.

7. a kind of double-deck LED package lens according to claim 6, it is characterized in that: the thickness of described fluorescence coating is 1.0mm or 1.5mm.

8. a kind of double-deck LED package lens according to claim 7, it is characterized in that: described alignment pin is stair-stepping column.

9. a kind of double-deck LED package lens according to claim 8, it is characterized in that: the refractive index of described first lens is less than the refractive index of the second lens.