CN209370885U - The light source of small beam angle - Google Patents
The light source of small beam angle Download PDFInfo
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- CN209370885U CN209370885U CN201920240943.XU CN201920240943U CN209370885U CN 209370885 U CN209370885 U CN 209370885U CN 201920240943 U CN201920240943 U CN 201920240943U CN 209370885 U CN209370885 U CN 209370885U
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Abstract
The utility model discloses a kind of light sources of small beam angle, including semiconductor light-emitting elements and lens, the semiconductor light-emitting elements be embedded in lens and with lens seamless combination, the side that the lens have top surface and connect with top surface, the semiconductor light-emitting elements have more than one light-emitting surface, wherein at least one light-emitting surface is arranged towards the top surface of the lens, and at least partly light of the lens profile as described in the semiconductor light-emitting elements directive can be transmitted after lens profile reflection along optical axis.The light-source structure of the small beam angle of the utility model is simple, and the light utilization ratio in reflective illumination application is greatly increased；Compared to the light source for not adding lens, light power is made to improve 10% or more；Compared with secondary lens, a lens are small in size, light-weight, and the seamless connection with chip is realized in light-source encapsulation, is easily installed, light emission rate improves；Simultaneously processing procedure it is simple, it is inexpensive, small in size, be suitable for scale manufacture and application.
Description
Technical field
The utility model relates to a kind of design of semiconductor illuminating light source, in particular to a kind of light source of small beam angle.
Background technique
In recent years, LED light source is widely applied in lighting area.Current most of LED light sources in application generally not
Add a lens or add lens of hemispherical, the light field that this light source obtains is usually Lambertian, as shown in Figure 1, Lambertian
The beam angle of light field is larger.And in some applications, the LED light source of small beam angle is needed, such as: transmission-type searchlight, transmission
The application fields such as formula flashlight, stage lighting.For further expansion LED light source application market, need to optimize it.
The light of small beam angle can be obtained by designing suitable secondary lens in lamps and lanterns at present, but be emitted from LED light source
Light out only projects the part (0 °~+/- θ) on lamps and lanterns secondary lens surface, could effectively be collimated by injection, become
This kind of main effective sunlight of lamps and lanterns.Light (+/- 90 °~+/- θ) without projecting lens surface, then freely shed, compare
Distance is penetrated without remarkable effect.As shown in Fig. 2, for the secondary lens schematic diagram in existing lamps and lanterns.
It for Lambertian light field, is calculated according to formula, as shown in figure 3, light utilization ratio is only 50% when the angle θ is 45 °；θ
When angle is 30 °, light utilization ratio drops to 25%；To make light utilization ratio reach 75% or more, then the angle θ must be less than 60 °, this
Mean that the diameter of lens will increase very much, lens cost of manufacture and difficulty can be brought to increase, lamps and lanterns volume and weight increases etc.
A series of problems.Formula may be expressed as:
η in formula: light utilization ratio；θ: the angle of LED light source and rims of the lens line and LED light source normal direction；i(θ):
LED light source is in the light intensity that angle is at θ.
Secondary lens refer to during assembling lamps and lanterns, in order to obtain required light field, and are installed at the optics in front of light source
Lens.Usually there is gap, spacing between secondary lens and light source, is not connected.Compared with a lens, in lamps and lanterns
Secondary lens not can increase the light extraction efficiency of LED, can only change the propagation path that extraneous light is injected to from LED, secondary
The volume and weight of lens is big, at high cost.
Utility model content
In view of the deficiencies in the prior art, the purpose of this utility model is to provide a kind of light sources of small beam angle, have
Improve light extraction efficiency, the features such as processing procedure is simple and convenient, inexpensive, small in size.
To realize foregoing purpose, the utility model is adopted the technical scheme that
The utility model embodiment provides a kind of light source of small beam angle comprising semiconductor light-emitting elements and lens,
The semiconductor light-emitting elements be embedded in lens and with lens seamless combination, the lens have top surface and connect with top surface
The side connect, the semiconductor light-emitting elements have more than one light-emitting surface, and wherein at least one light-emitting surface is towards the lens
Top surface setting, and at least partly light of the lens profile as described in the semiconductor light-emitting elements directive can be by described
It is transmitted after mirror offside reflection along optical axis.
In some embodiments, the light of the lens top surface as described in the semiconductor light-emitting elements directive can be from described
Vertex face transmits and transmits along optical axis.
Further, the size of the light-emitting surface towards lens top surface of the semiconductor light-emitting elements and the lens top surface
The ratio between full-size be less than 2:3.
Further, the semiconductor light-emitting elements includes towards the light-emitting surface of lens top surface or the shape of lens top surface
Circle, rectangle, diamond shape or polygon.
Further, the lens top surface includes plane or convex surface.
Further, the lens profile be transparent side, the lens profile as described in the semiconductor light-emitting elements directive,
The light that incidence angle is greater than the angle of total reflection transmits after capable of being reflected by the lens profile along optical axis；Alternatively, the lens profile
For reflecting surface, edge after the light of the lens profile as described in the semiconductor light-emitting elements directive can be reflected by the lens profile
Optical axis transmission.
Compared with prior art, the utility model at least has the advantages that
1) light-source structure of small beam angle provided by the utility model is simple, can effectively improve light extraction efficiency, processing procedure letter
List is convenient, inexpensive, small in size, is suitable for scale manufactures and applies；
2) light source of small beam angle provided by the utility model by it is reflective illumination application in light utilization efficiency significantly
Increase；Compared to the light source for not adding lens, light power is made to improve 10% or more；Compared with secondary lens, a lens
It is small in size, light-weight, the seamless connection with chip is realized in light-source encapsulation, is easily installed, and light emission rate improves；
3) light source of small beam angle provided by the utility model compares common lambert's light field, in same light utilization ratio item
Under part, lamp lens diameter be can reduce very much, and correspondingly the volume weight of lamps and lanterns can all reduce.
Detailed description of the invention
Fig. 1 is Lambertian light field schematic diagram.
Fig. 2 is the secondary lens schematic diagram in lamps and lanterns.
Fig. 3 is the graph of relation of Lambertian light field light utilization ratio and angle.
Fig. 4 is the corresponding optical field distribution figure of light source of small beam angle in one preferred embodiment of the utility model.
Fig. 5 is that the relationship of the light utilization ratio and angle of the light source of small beam angle in one preferred embodiment of the utility model is bent
Line chart.
Fig. 6 a- Fig. 6 f is the structural schematic diagram of the light source of small beam angle in the utility model different preferred embodiments respectively.
Fig. 7 is the corresponding optical field distribution figure of light source of small beam angle in the utility model another preferred embodiment.
Description of symbols: lens of 1-, 2- fluorescence coating, 3-LED chip, 4- package substrate, 5- reflector.
Specific embodiment
In view of deficiency in the prior art, inventor is studied for a long period of time and is largely practiced, and is able to propose that this is practical new
The technical solution of type.The technical solution, its implementation process and principle etc. will be further explained as follows.
The one aspect of the utility model embodiment provides a kind of light source of small beam angle comprising semiconductor light emitting element
Part and lens, the semiconductor light-emitting elements be embedded in lens and with lens seamless combination, the lens have top surface with
And the side connecting with top surface, the semiconductor light-emitting elements have more than one light-emitting surface, wherein at least one light-emitting surface court
It is arranged to the top surface of the lens, and at least partly light energy of the lens profile as described in the semiconductor light-emitting elements directive
It is transmitted after enough reflections by the lens profile along optical axis.
In some embodiments, the light of the lens top surface as described in the semiconductor light-emitting elements directive can be from described
Vertex face transmits and transmits along optical axis.
In some embodiments, the size of the light-emitting surface towards lens top surface of the semiconductor light-emitting elements is (such as straight
Diameter or diagonal line length) with the ratio between the full-size (such as diameter or diagonal line length) of the lens top surface it is less than 2:3.
In some embodiments, the semiconductor light-emitting elements towards the light-emitting surface of lens top surface or the shape of lens top surface
Shape be it is round or rectangular, it is described it is rectangular can be rectangle, diamond shape, polygon etc., but be not limited only to this.Wherein, it is partly led when described
Body light-emitting component towards the light-emitting surface of lens top surface or lens top surface be round when, size is with diameter calculation；It is partly led when described
Body light-emitting component towards the light-emitting surface of lens top surface or lens top surface be rectangular when, size is calculated with diagonal line length.
In some embodiments, the lens top surface includes plane or convex surface, but is not limited only to this.
Further, the convex surface includes the group of any one or more in spherical surface, hyperboloid, paraboloid, conical surface etc.
It closes, for example, the convex surface can be array convex surface etc., but is not limited only to this.
In some embodiments, the lens profile is transparent side, the lens as described in the semiconductor light-emitting elements directive
Side, incidence angle be greater than the angle of total reflection light can by the lens profile reflect after along optical axis transmit；Alternatively, described
Mirror side is reflecting surface, and the light of the lens profile as described in the semiconductor light-emitting elements directive can be anti-by the lens profile
It is transmitted after penetrating along optical axis.
In some embodiments, the lens profile is arcwall face.
Further, the size (such as diameter or diagonal line length) on the arcwall face top be greater than lower part size (such as
Diameter or diagonal line length).
It further says, the lens profile small big arcwall face (for transparent side or reflecting surface) under being is described
Vertex face is convex surface (transparent side), converges light field along light source Axial-running Out light, forms small beam angle.
Further, the arcwall face includes paraboloid, spherical surface or hyperboloid etc., transmission plane and reflecting surface all can, but
It is not limited only to this.
Further, the lens be transparent material constitute, can specifically include silica gel, PC, PMMA, glass, PP, PS,
PVC, PET, ABS, SAN etc., but it is not limited only to this.
In some embodiments, the semiconductor light-emitting elements include LED chip, and the LED chip is directly tied with lens
It closes；Alternatively, the semiconductor light-emitting elements include LED chip, fluorescence at least is coated on the light-emitting surface of the LED chip
Layer, the fluorescence coating are bound directly with lens.
Further, the quantity of the LED chip be 1 or more, the LED chip can for blue light, feux rouges, green light,
The LED chip of the multi-wavelengths such as yellow light, infrared, but not limited to this.
Further, the material of the fluorescence coating is fluorescent powder, and the fluorescent powder can be unstressed configuration powder, yellow light fluorescence
The fluorescent powder of the different wave lengths such as powder, green light fluorescent powder, red light fluorescent powder, but not limited to this.
Further, the upper convex surface maximum gauge of an aforementioned lens is 1.5 times or more of fluorescence coating size.
In some embodiments, the bottom surface of the semiconductor light-emitting elements is in conjunction with substrate, the semiconductor light-emitting elements
Top surface and side be light-emitting surface, and the top surface of the semiconductor light-emitting elements, side are respectively facing the top of the lens
Face, side setting.
Further, seamless connection is realized between aforementioned lens, fluorescence coating and a semiconductor light-emitting elements.It is aforementioned primary
Lens side cambered surface has the light the wide-angle for entering a lens by fluorescence coating issued in aforesaid semiconductor light-emitting component
The function of reflecting away.An aforementioned lensed tip convex surface, which has, axially converges the light of smaller angle to light source through reflecting
Function.
In conclusion the light-source structure of the small beam angle of the utility model is simple, by the light benefit in reflective illumination application
It is greatly increased with efficiency；Compared to the light source for not adding lens, light power is made to improve 10% or more；Compared with secondary lens, institute
It states that a lens are small in size, light-weight, the seamless connection with chip is realized in light-source encapsulation, is easily installed, light emission rate improves；
Simultaneously processing procedure it is simple and convenient, it is inexpensive, small in size, be suitable for scale manufacture and apply.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with several preferable realities
Example and attached drawing are applied, explanation is further explained in detail to the technical solution of the utility model.It should be appreciated that described herein
Specific embodiment is only used to explain the utility model, but experiment condition therein and setup parameter are not construed as to originally practical new
The limitation of type basic technical scheme.And the protection scope of the utility model is not limited to the following embodiments.In addition, being retouched below
Involved technical characteristic as long as they do not conflict with each other can phase in each embodiment of the utility model stated
Mutually combination.
It please refers to shown in Fig. 6 a, is the typical structure of the LED light source of the small beam angle of one exemplary embodiments of the utility model,
It includes a lens 1, fluorescence coating 2, LED chip 3 and package substrate 4.Lens and LED chip 3 or phosphor gel
Seamless connection.Specifically, fluorescence coating 2 is coated on the light-emitting surface of the LED chip 3, the fluorescence coating 2 and a lens 1
It binds directly.The bottom surface of the LED chip 3 is combined with package substrate 4, and the top surface and side of the LED chip 3 are light out
Face, and the top surface of the LED chip 3, side are respectively facing the top surface of a lens 1, side setting.
Wherein, the side of a lens 1 small big arcwall face (for transparent side or reflecting surface), lens under being
1 top surface is convex surface (transparent side), converges light field along light source Axial-running Out light, forms small beam angle.Lens 1 have
Top surface and the side connecting with top surface, the LED chip 3 have more than one light-emitting surface, wherein at least one light-emitting surface court
It is arranged to the top surface of a lens 1, and at least partly light of 1 side of lens as described in 3 directive of LED chip
Line can be transmitted after 1 offside reflection of a lens along optical axis.
Wherein, seamless connection is realized between an aforementioned lens 1, fluorescence coating 2 and LED chip 3.1 side cambered surface of lens
With the light for issuing the wide-angle for entering a lens 1 by fluorescence coating 2 in aforementioned LED chip 3 is axially reflected along light source
Going out, (a 1 side cambered surface of lens is transparent side: the light for being greater than the angle of total reflection is axially reflected away along light source；Lens 1
Side cambered surface be reflecting surface: all light all reflect away) function, 1 upper convex surface of an aforementioned lens have smaller angle
Light through reflecting the function of axially converging to light source.
Further, the diameter and a lens 1 of the light-emitting surface of 1 top surface of lens of direction for the LED chip 3
The ratio between maximum gauge of top surface is less than 2:3.
Further, the diameter of the LED chip 3 light-emitting surface corresponding with 1 top surface of lens is less than described primary saturating
The diameter of 1 top surface of mirror, also that is, the L1 in Fig. 6 a is greater than 1.5xL2.
Further, a lens 1 are transparent material composition in the preferred embodiment, can specifically include silicon
Glue, PC, PMMA, glass, PP, PS, PVC, PET, ABS, SAN etc., but it is not limited only to this.
Further, the quantity of LED chip 3 is 1 or more in the preferred embodiment, and the LED chip can be indigo plant
The LED chip of the multi-wavelengths such as light, feux rouges, green light, yellow light, infrared, but not limited to this.
Further, the material of the fluorescence coating 2 is fluorescent powder in the preferred embodiment, and the fluorescent powder can be nothing
The fluorescent powder of the different wave lengths such as fluorescent powder, yellow fluorescent powder, green light fluorescent powder, red light fluorescent powder, but not limited to this.
Further, the upper convex surface maximum gauge of an aforementioned lens 1 is 1.5 times or more of 2 size of fluorescence coating.
The working principle of the LED light source of small beam angle is at least in the present embodiment are as follows:
The effect of a lens side cambered surface described in one:
The light of wide-angle is axially reflected away along light source；(a lens side cambered surface is transparent side: greater than the angle of total reflection
Light axially reflected away along light source；No. one time lens side cambered surface is reflecting surface: all light all reflect away
The effect of the upper convex surface of a lens described in two:
The light of smaller angle is reflected to light source and is axially converged.
Further, the diameter of the top concave surface of a lens is greater than the size of fluorescence coating.
Further, a lens are realized and the seamless connection of LED chip, raising optical power when packaged.
After tested, graph of relation such as Fig. 5 of the light utilization ratio and angle of the LED light source of the small beam angle of the present embodiment
It is shown.Wherein, when the angle θ is 30 °, light utilization ratio > 58%；When the angle θ is 45 °, light utilization ratio > 90%；Compared to common
Lambert's light field, under the conditions of same light utilization ratio, lamps and lanterns secondary lens diameter be can reduce very much, correspondingly the body of lamps and lanterns
Product weight can all reduce.
Further, the convex surface of a lens can be spherical surface, hyperboloid, paraboloid, any one in the conical surface
Or a variety of combinations, for example, the convex surface can be array convex surface etc., the lens profile include it is transparent under it is small big
Arcwall face, the arcwall face can be paraboloid, spherical surface or hyperboloid etc., therefore, the LED light source of the small beam angle of the utility model
Specific structure have many forms, such as see structure shown in Fig. 6 b- Fig. 6 f, but be not limited only to these structures.Wherein, scheme
Also with the structure of reflector 5 in 6d.
The corresponding optical field distribution figure of the LED light source of small beam angle please refers to Fig. 4 institute in one preferred embodiment of the utility model
Show, after installing a lens additional, optical power efficiency improves 15%, and as can be seen from Figure 4, experimental configuration shows that 50% beam angle is about
60°。
Further, the corresponding optical field distribution figure of the LED light source of small beam angle in the utility model another preferred embodiment
It please refers to shown in Fig. 7.
In conclusion the light source of the small beam angle of the utility model will be anti-by the above-mentioned technical proposal of the utility model
The utilization efficiency for the light penetrated in formula illumination application greatly increases；Compared to the light source for not adding lens, light power is made to improve 10%
More than；Compared with secondary lens, a lens are small in size, light-weight, and the seamless company with chip is realized in light-source encapsulation
Connect, be easily installed, can effectively improve light extraction efficiency, processing procedure it is simple and convenient, it is inexpensive, small in size, be suitable for scale manufacture and
Using.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
It should be appreciated that above-described embodiment is only to illustrate the technical ideas and features of the present invention, it is ripe its object is to allow
The personage for knowing technique can understand the content of the utility model and implement accordingly, can not limit the utility model with this
Protection scope.All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover in the utility model
Within protection scope.
Claims (12)
1. a kind of light source of small beam angle, it is characterised in that including semiconductor light-emitting elements and lens, the semiconductor light emitting element
The side that part is embedded in lens and has top surface with lens seamless combination, the lens and connect with top surface, described half
Conductor light-emitting component has more than one light-emitting surface, and wherein at least one light-emitting surface is arranged towards the top surface of the lens, and
Edge after at least partly light of the lens profile as described in the semiconductor light-emitting elements directive can be reflected by the lens profile
Optical axis transmits.
2. the light source of small beam angle as described in claim 1, it is characterised in that: as described in the semiconductor light-emitting elements directive
The light of lens top surface can be transmitted from the lens top surface and be transmitted along optical axis.
3. the light source of small beam angle as claimed in claim 1 or 2, it is characterised in that: the direction of the semiconductor light-emitting elements
The ratio between the size of the light-emitting surface of lens top surface and the full-size of the lens top surface are less than 2:3.
4. the light source of small beam angle as claimed in claim 3, it is characterised in that: the semiconductor light-emitting elements towards lens
The light-emitting surface of top surface or the shape of lens top surface include circle, rectangle, diamond shape or polygon.
5. the light source of small beam angle as claimed in claim 1 or 2, it is characterised in that: the lens top surface includes plane or convex
Face.
6. the light source of small beam angle as claimed in claim 5, it is characterised in that: the convex surface includes spherical surface, hyperboloid, parabolic
The combination of any one or more in face, the conical surface.
7. the light source of small beam angle as claimed in claim 6, it is characterised in that: the convex surface includes array convex surface.
8. the light source of small beam angle as described in claim 1, it is characterised in that: the lens profile is transparent side, by described
Lens profile described in semiconductor light-emitting elements directive, incidence angle be greater than the angle of total reflection light can be anti-by the lens profile
It is transmitted after penetrating along optical axis；Alternatively, the lens profile is reflecting surface, the lens profile as described in the semiconductor light-emitting elements directive
Light can by the lens profile reflect after along optical axis transmit.
9. the light source of small beam angle as described in claim 1, it is characterised in that: the lens profile is arcwall face.
10. the light source of small beam angle as claimed in claim 9, it is characterised in that: under the size on the arcwall face top is greater than
The size in portion；And/or the arcwall face includes paraboloid, spherical surface or hyperboloid.
11. the light source of small beam angle as described in claim 1, it is characterised in that: the semiconductor light-emitting elements include LED core
Piece, the LED chip are bound directly with lens；Alternatively, fluorescence coating is at least coated on the light-emitting surface of the LED chip, institute
Fluorescence coating is stated to bind directly with lens.
12. the light source of small beam angle as described in claim 1, it is characterised in that: the bottom surface of the semiconductor light-emitting elements with
Substrate combines, and the top surface and side of the semiconductor light-emitting elements are light-emitting surface, and the top of the semiconductor light-emitting elements
Face, side are respectively facing the top surface of the lens, side setting.
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| CN201920240943.XU CN209370885U (en) | 2019-02-26 | 2019-02-26 | The light source of small beam angle |
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| CN201920240943.XU CN209370885U (en) | 2019-02-26 | 2019-02-26 | The light source of small beam angle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022967A (en) * | 2019-11-25 | 2020-04-17 | 中国科学院苏州纳米技术与纳米仿生研究所 | Regional light source dodging structure applied to fluorescence imaging system and fluorescence imaging system |
| CN111609330A (en) * | 2019-02-26 | 2020-09-01 | 中国科学院苏州纳米技术与纳米仿生研究所 | Light source with small beam angle |
-
2019
- 2019-02-26 CN CN201920240943.XU patent/CN209370885U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111609330A (en) * | 2019-02-26 | 2020-09-01 | 中国科学院苏州纳米技术与纳米仿生研究所 | Light source with small beam angle |
| CN111022967A (en) * | 2019-11-25 | 2020-04-17 | 中国科学院苏州纳米技术与纳米仿生研究所 | Regional light source dodging structure applied to fluorescence imaging system and fluorescence imaging system |
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