CN209370871U - Enhance the light source of lateral light field - Google Patents

Abstract

The utility model discloses a kind of light sources for enhancing lateral light field, 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 lens, can be reflected by the lens top surface by at least partly light of the semiconductor light-emitting elements directive lens top surface and transmit again from lens profile.The light-source structure of the lateral light field of enhancing 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, improve light power；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 and convenient, it is inexpensive, small in size, be suitable for scale manufacture and apply.

Description

Enhance the light source of lateral light field

Technical field

The utility model relates to a kind of design of semiconductor illuminating light source, in particular to a kind of light for enhancing lateral light field Source.

Background technique

In recent years, LED light source is widely applied in lighting area.Current most of LED light sources in application generally not Adding a lens or adds lens of hemispherical, the light field that this light source obtains is usually Lambertian, as shown in Figure 1-3, lambert The central field of type light field is powerful, and the field strength at wide-angle is small.And in some applications, need to enhance the LED light source of lateral light field, Such as: the application fields such as reflective searchlight, reflective flashlight, miner's head lamp, reflecting type vehicle head lamp.In order to further expand Big LED light source application market, needs to optimize it.

The light launched from LED light source only projects the part (+/- 90 °~+/- θ) of reflector reflecting surface, Cai Nengyou Effect is collimated to be projected, and the main effective sunlight of this kind of lamps and lanterns is become.Light (- θ~+θ) without projecting reflector reflecting surface, It then freely sheds, intensity and square distance are decayed in inverse ratio, do not have remarkable effect to irradiation distance, as shown in Fig. 2, being existing lamp Reflector structural schematic diagram in tool.

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 reaches 75%；To make light utilization ratio reach 85% or more, then the angle θ must be meaned less than 23 ° Reflector length to increase very much, can bring lens cost of manufacture increase, lamps and lanterns volume and weight increase a series of problems, such as. Formula may be expressed as:

η in formula: light utilization ratio；θ: the angle of LED light source and reflector edge 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 light source, can only change the propagation path that extraneous light is injected to from LED, The volume and weight of secondary 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 source for enhancing lateral light field, Have the characteristics that raising light extraction efficiency, processing procedure are 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 for enhancing lateral light field comprising semiconductor light-emitting elements and thoroughly Mirror, the semiconductor light-emitting elements be embedded in lens and with lens seamless combination, the lens have top surface and with top The side of face connection, the semiconductor light-emitting elements have more than one light-emitting surface, and wherein at least one light-emitting surface is described in The top surface of lens is arranged, and at least partly light of the lens top surface as described in the semiconductor light-emitting elements directive can be by described The reflection of vertex face is transmitted from the lens profile again.

In some embodiments, the size of semiconductor light-emitting elements light-emitting surface corresponding with lens top surface is less than described The size of lens top surface.

Further, the shape of semiconductor light-emitting elements light-emitting surface corresponding with lens top surface or lens top surface includes Circle, rectangle, diamond shape or polygon.

In some embodiments, the lens top surface is transparent side, the lens as described in the semiconductor light-emitting elements directive The some light of top surface be transmitted after capable of being reflected by the lens top surface from the lens profile, and another part light can be through The lens top surface is emitted to the lateral refraction of the lens.

Further, the lens top surface is reflecting surface, the lens top surface as described in the semiconductor light-emitting elements directive Light transmits after capable of being reflected by the lens top surface from the lens profile.

Further, the lens top surface includes plane or concave surface.

Further, the semiconductor light-emitting elements include LED chip, and the LED chip is bound directly with lens；Or Person, the semiconductor light-emitting elements include LED chip, and fluorescence coating is at least coated on the light-emitting surface of the LED chip, described Fluorescence coating is bound directly with lens.

Compared with prior art, the utility model at least has the advantages that

1) light-source structure of the lateral light field of enhancing provided by the utility model is simple, can effectively improve light extraction efficiency, system Journey is simple and convenient, it is inexpensive, small in size, be suitable for scale and manufacture and apply；

2) light source of the lateral light field of enhancing provided by the utility model is by the utilization efficiency of the light in reflective illumination application It greatly increases；Compared to the light source for not adding lens, improve light power；Compared with secondary lens, a lens volume It is small, light-weight, the seamless connection with chip is realized in light-source encapsulation, is easily installed, and light emission rate improves, also, due to being LED A lens being added in encapsulation, cost will not be higher than the LED light source that common hemispherical lens encapsulates；

3) light source of the lateral light field of enhancing provided by the utility model compares common lambert's light field, and reflector length can Shorten very much, 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 reflector structural schematic diagram in lamps and lanterns.

Fig. 3 is the graph of relation of Lambertian light field light utilization ratio and angle.

Fig. 4 a- Fig. 4 d is the optical field distribution for enhancing the light source of lateral light field in the utility model different preferred embodiments respectively Figure.

Fig. 5 is the pass for enhancing the light utilization ratio and angle of the light source of lateral light field in one preferred embodiment of the utility model It is curve graph.

Fig. 6 a- Fig. 6 j is the structural schematic diagram for enhancing the light source of lateral light field in the utility model different preferred embodiments.

Description of symbols: lens of 1-, 2- fluorescence coating, 3-LED chip, 4- package substrate.

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 for enhancing lateral light field comprising semiconductor hair Optical element and lens, the semiconductor light-emitting elements be embedded in lens and with lens seamless combination, the lens have top Face and the side connecting with top surface, the semiconductor light-emitting elements have more than one light-emitting surface, and wherein at least one goes out light It is arranged facing towards the top surface of the lens, at least partly light energy of the lens top surface as described in the semiconductor light-emitting elements directive It is enough to be transmitted again from the lens profile by lens top surface reflection.

In some embodiments, the size of semiconductor light-emitting elements light-emitting surface corresponding with lens top surface is (such as straight Diameter or diagonal line length) it is less than the size (such as diameter or diagonal line length) of the lens top surface.

Further, the shape of semiconductor light-emitting elements light-emitting surface corresponding with lens top surface or lens top surface is circle Shape is rectangular, it is described it is rectangular can be rectangle, diamond shape, polygon etc., but be not limited only to this.Wherein, when the semiconductor light emitting When element light-emitting surface corresponding with lens top surface or lens top surface are round, size is with diameter calculation；When the semiconductor light emitting When element light-emitting surface corresponding with lens top surface or lens top surface are rectangular, size is calculated with diagonal line length.

In some embodiments, the lens top surface is transparent side, the lens as described in the semiconductor light-emitting elements directive The some light of top surface be transmitted after capable of being reflected by the lens top surface from the lens profile, and another part light can be through The lens top surface is emitted to the lateral refraction of the lens.

Further, the lens top surface is reflecting surface, the lens top surface as described in the semiconductor light-emitting elements directive Light transmits after capable of being reflected by the lens top surface from the lens profile.

Further, the plane of the lens top surface or concave surface are transparent side or high reflection face, make light field lateral (big Angle) go out light enhancing.

Further, the lens top surface includes plane or concave surface, but is not limited only to this.

Further, the concave surface includes spherical concave surface, ellipsoid concave surface, parabolic concave surface, hyperbolic concave surface or taper concave surface The combination of equal regular shapes or these types of curved surface, but not limited to this.

Further, the lens profile includes transparent arcwall face or cylinder etc., but is not limited only to this.

Further, the arcwall face includes that the regular shapes such as spherical surface, the conical surface, hyperboloid, ellipsoid or these types are bent The combination in face, 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.

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.

In conclusion the light in reflective illumination application is utilized effect by the light source of the lateral light field of enhancing of the utility model Rate greatly increases；Compared to the light source for not adding lens, improve light power；Compared with secondary lens, a lenticular body Product is small, light-weight, and the seamless connection with chip is realized in light-source encapsulation, is easily installed, light emission rate improves, also, due to being A lens being added in LED encapsulation, cost will not be higher than the LED light source that common hemispherical lens encapsulates；And this is practical The light-source structure of the novel lateral light field of enhancing is simple, can effectively improve that light extraction efficiency, processing procedure be simple and convenient, inexpensive, body Product is small, is suitable for scale manufactures and applies.

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 case of the LED light source of the lateral light field of enhancing of one exemplary embodiments of the utility model Structure a comprising lens 1, fluorescence coating 2, LED chip 3 and package substrate 4.Lens and LED chip 3 or fluorescence Arogel seamless connection.Specifically, be coated with fluorescence coating 2 on the light-emitting surface of the LED chip 3, the fluorescence coating 2 with it is primary thoroughly Mirror 1 is bound 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 out Smooth surface, and the top surface of the LED chip 3, side are respectively facing the top surface of a lens 1, side setting.

Wherein, the top surface of a lens 1 be plane or concave surface, lens profile be arcwall face or cylinder, top surface Plane or concave surface are transparent side or high reflection face, and light field is made to go out light enhancing in lateral (wide-angle), and side is transparent side, make from The light transmission of lens top surface reflection is gone out.The side that lens 1 have top surface and connect with top surface, the LED core Piece 3 has more than one light-emitting surface, and wherein at least one light-emitting surface is arranged towards the top surface of a lens 1, by described At least partly light of 1 top surface of lens described in 3 directive of LED chip can be reflected by 1 top surface of a lens again from institute 1 side of lens is stated to transmit.

Wherein, seamless connection is realized between an aforementioned lens 1, fluorescence coating 2 and LED chip 3.An aforementioned lens 1 top When portion concave surface is transparent, the concave surface at top, which has, to be reflected away the light for being less than the angle of total reflection to wide-angle or is totally reflected being greater than The light at angle is to lateral reflection, the function of allowing light to transmit away from 1 side of lens.Aforementioned 1 top concave surface of a lens is When high reflection face, the concave surface at top has the light of top concave surface is mapped to lateral reflection, allows light from 1 side of lens The function of transmiting away.1 side of an aforementioned lens has the function that the light transmission reflected from 1 top surface of lens is gone out.

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 L2.

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 diameter of the top concave surface of an aforementioned lens 1 is greater than the size of fluorescence coating 2.

Enhance the working principle of the LED light source of lateral light field in the present embodiment at least are as follows:

The transparent situation in top concave surface of a lens described in one:

1. the concave surface at top reflects away some light to wide-angle (less than the light of the angle of total reflection)；

2. the concave surface at top another part light (greater than the light of the angle of total reflection) to lateral reflection, make light from it is primary thoroughly Mirror side transmits away.

The top concave surface of a lens described in two, is high reflection face situation:

The concave surface at top to lateral reflection, allows light to transmit from a lens profile light for being mapped to top concave surface It goes.

Further, a lens are realized and the seamless connection of LED chip, raising optical power when packaged.

After tested, the graph of relation of the light utilization ratio and angle of the LED light source of the lateral light field of enhancing of the present embodiment As shown in Fig. 5.Wherein, when the angle θ is 60 °, light utilization ratio 51%；When the angle θ is 40 °, light utilization ratio > 75%；Light benefit Reach 85% or more with efficiency, then the angle θ is only 30 °, compare common lambert's light field, reflector length can shorten very much, with This volume weight for corresponding to lamps and lanterns can all reduce.

Further, the concave surface of a lens can be spherical concave surface, ellipsoid concave surface, parabolic concave surface, hyperbolic concave surface Or taper concave surface etc., the lens profile include transparent arcwall face or cylinder, the arcwall face can be spherical surface, the conical surface or ellipse Spherical surface etc., therefore, the specific structure that the utility model enhances the LED light source of lateral light field have many forms, please refer to Fig. 6 b- figure Shown in 6j.

The optical field distribution figure for enhancing the LED light source of lateral light field in the utility model different preferred embodiments please refers to figure Shown in 4a- Fig. 4 c, central light strength reduces, and lateral light field increases, and half beam angle increases, and illustrates the LED light source knot of the utility model Structure can effectively enhance lateral light field.The LED light source for enhancing lateral light field in the utility model different preferred embodiments installs additional once After lens, not only lateral light field is significantly increased, and the optical power efficiency of light source improves 10%~13%.

In conclusion by the above-mentioned technical proposal of the utility model, due to being a lens being added in LED encapsulation, Cost will not be higher than the LED light source that common hemispherical lens encapsulates.Compared with secondary lens, small in size, the weight of a lens Gently；The seamless connection with chip can be realized in light-source encapsulation, is easily installed, and it is simple can to effectively improve light extraction efficiency, processing procedure It is convenient, inexpensive, small in size, be suitable for scale manufacture and apply.

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 (10)

1. a kind of light source for enhancing lateral light field, it is characterised in that including semiconductor light-emitting elements and lens, the semiconductor hair The side that optical element is embedded in lens and has top surface with lens seamless combination, the lens and connect with top surface, institute Semiconductor light-emitting elements are stated with more than one light-emitting surface, wherein at least one light-emitting surface is arranged towards the top surface of the lens, At least partly light of the lens top surface as described in the semiconductor light-emitting elements directive can by the lens top surface reflect again from The lens profile transmits.

2. enhancing the light source of lateral light field as described in claim 1, it is characterised in that: the semiconductor light-emitting elements and lens The size of the corresponding light-emitting surface in top surface is less than the size of the lens top surface；The semiconductor light-emitting elements are corresponding with lens top surface Light-emitting surface or lens top surface shape include circle, rectangle, diamond shape or polygon.

3. enhancing the light source of lateral light field as described in claim 1, it is characterised in that: the lens top surface is transparent side, by The some light of lens top surface described in the semiconductor light-emitting elements directive can be reflected by the lens top surface after from described Mirror side transmits, and another part light can be emitted through the lens top surface to the lateral refraction of the lens.

4. enhancing the light source of lateral light field as described in claim 1, it is characterised in that: the lens top surface is reflecting surface, by The light of lens top surface described in the semiconductor light-emitting elements directive can be reflected by the lens top surface after from the lens side Face transmits.

5. such as the light source of the lateral light field of enhancing of any of claims 1-4, it is characterised in that: the lens top surface packet Include plane or concave surface.

6. enhancing the light source of lateral light field as claimed in claim 5, it is characterised in that: the concave surface includes spherical concave surface, ellipse Spherical-concave-surface, parabolic concave surface, hyperbolic concave surface, any one or two or more combinations in taper concave surface.

7. such as the light source of the lateral light field of enhancing of any of claims 1-4, it is characterised in that: the lens profile packet Include transparent arcwall face or cylinder.

8. enhancing the light source of lateral light field as claimed in claim 7, it is characterised in that: the arcwall face include spherical surface, the conical surface, Any one in hyperboloid, ellipsoid or two or more combinations.

9. enhancing the light source of lateral light field as described in claim 1, it is characterised in that: the semiconductor light-emitting elements include LED chip, the LED chip are bound directly with lens；Alternatively, the semiconductor light-emitting elements include LED chip, at least in institute It states and is coated with fluorescence coating on the light-emitting surface of LED chip, the fluorescence coating is bound directly with lens.

10. enhancing the light source of lateral light field as described in claim 1, it is characterised in that: the bottom of the semiconductor light-emitting elements Face is in conjunction with substrate, and the top surface and side of the semiconductor light-emitting elements are light-emitting surface, and the semiconductor light-emitting elements Top surface, side be respectively facing the top surface of the lens, side setting.