The secondary optical lens of light emitting diode and array structure thereof
The utility model relates to the LED lighting field, particularly relates to a kind of LED lens.
The lens arrangement of existing LED lamp such as China Patent No. are that ZL200720172454.2, name are called " secondary optical lens ", disclose described in the patent document that day is on October 29th, 2008.Its surface is peanut shape, is provided with LED lamp chamber on the bottom surface of lens body, and LED lamp chamber is located at the intersection point center of vertical (length direction) symmetrical center line in bottom surface and horizontal (width) symmetrical center line.The LED lamp is arranged in the LED lamp chamber, and the LED lamp is realized optically focused, distributed optical illumination by the LED lens.
The bottom surface of the lens of above-mentioned LED lamp is flat, and the light great majority that sent by LED reflect lens body via crown upper surface, but the attachment that the light that has sub-fraction to reflect lens by crown bottom can be positioned at around the lens bottom is blocked.Therefore this part light be wasted, and current LED lamp can't get up this part light-use.
The utility model content
First technical problem to be solved in the utility model is: a kind of secondary optical lens of light emitting diode is provided, and when the LED lamp was as street lamp, these lens were used for improving road lighting efficient, will be used by the light that send the lens body bottom.
Second technical problem to be solved in the utility model is: the secondary optical lens array structure that a kind of light emitting diode is provided, when the LED lamp is as street lamp, this lens arra is used for improving the illumination efficiency on road surface, will be used by the light that send the lens body bottom.
In order to solve above-mentioned first technical problem, the utility model proposes a kind of secondary optical lens of light emitting diode, the main body that comprises lens, main body comprises the three-dimensional crown and the three-dimensional bottom surface of top refraction bright dipping, the top bore of bottom surface is greater than the bottom bore, crown and bottom surface connect together, and are provided with the LED lamp chamber of stretching into body interior on the bottom surface of main body; Described bottom surface comprises the three-dimensional reflecting surface that has to described crown reflection ray.Three-dimensional crown and three-dimensional bottom surface are meant that the 3 D stereo of solid angle face is all arranged.The top bore of bottom surface refers to that greater than the bottom bore three-dimensional bottom surface upper port area is bigger than lower port area.Crown is a plane of refraction, and the light that LED is sent is assigned to the road surface according to the light energy of brightness lighting requirement.The lens cambered surface: reflecting surface is that the light in the big cone angle that LED is sent reflects to crown, and crown is assigned to the road surface according to the light energy of brightness lighting requirements such as road surface.
In order to solve second technical problem of the present utility model, the utility model proposes a kind of secondary optical lens array structure of light emitting diode, comprise a plurality of lens of forming array; Each lens comprises the main body of lens, and main body comprises the three-dimensional crown and the three-dimensional bottom surface of top refraction bright dipping, and the top bore of bottom surface is greater than the bottom bore, and crown and bottom surface connect together, and are provided with the LED lamp chamber of stretching into body interior on the bottom surface of main body; Described bottom surface comprises the three-dimensional reflecting surface that has to described crown reflection ray.
Preferably: described bottom surface also comprises the datum level that is used for the LED lamp is positioned cooperation, datum level be positioned at described LED lamp chamber around, the periphery of datum level is described reflecting surface.
Preferably: described datum level is the plane.Datum level is lens and the place that contacts of LED lamp, and flat datum level helps lens and LED lamp accurate in locating and stable being connected.
Preferably: described reflecting surface is the flat slope face that slope equals 1, and perhaps reflecting surface is a cambered surface.Just the axial section intersection of reflecting surface is straight line or camber line.The axial section of reflecting surface is meant the tangent plane through the symmetry axis of (Z axle) on the three-dimensional reflecting surface short transverse, the intersection of axial section intersection spindle tangent plane and reflecting surface.
Preferably: described main body profile is a symmetrical structure; The center in described lamp chamber is located at departs from bottom surface symmetrical centre point and on the position of a symmetrical center line of passing center, lamp chamber.The light that the design in this asymmetrical LED lamp chamber can make the LED street lamp send more is partial to a side, finishes the asymmetric batswing tab luminous intensity distribution of road lighting TYPEI, TYPEII, TYPEIII etc.; During application, the light that sends then can more be concentrated according to the road surface, makes in the whole width range in road surface and can access more illumination, and its illuminating effect is better like this, and illumination efficiency is higher.
Preferably: the described symmetrical centre point of misalignment in described LED lamp chamber is apart from 1.0mm～1.4mm.
Preferably: described LED lamp chamber is a semicircular cavities.
Preferably: between per two adjacent lenses unit connecting portion is arranged, there is chase the junction, bottom surface of connecting portion and lens unit, and the chase face of chase is three-dimensional cambered surface.Connecting portion is two lens requisite parts when connecting, and connecting portion can make the reflecting surface of bottom surface a breach occur, and this chase structure can reflect the light of missing the breach from the bottom reflection face to crown.
The beneficial effects of the utility model are as follows:
Compared to existing technology, the bottom surface of lens body is designed to have the reflecting surface (as arcwall face) of reflection ray function, the light that sends from the lens body bottom can be reflexed on the plane of refraction above the main body by reflecting surface like this, send again, so just can make full use of the light that sends by the lens body bottom, under the square one, prior art is greatly improved the utilization rate of luminous energy relatively.
Figure of description
Fig. 1 is the three-dimensional structure diagram of a kind of LED lens of the utility model.
Fig. 2 is the front elevation of the utility model LED lens bottom surface.
Fig. 3 is along the profile of A-A direction among Fig. 2.
Fig. 4 is along the profile of B-B direction among Fig. 2.
Fig. 5 is the Facad structure figure of the utility model LED array structure thereof.
Fig. 6 is along the profile of C-C direction among Fig. 5.
Fig. 7 is along the profile of D-D direction among Fig. 5.
Fig. 8 is an E portion partial enlarged drawing among Fig. 7.
Fig. 9 is the distribution of light schematic diagram in a lateral direction of lens.
Figure 10 is the distribution of light schematic diagram on the longitudinal direction of lens.
Identifier declaration among the figure: body 1, LED lamp chamber 2, bottom surface 3, crown 4, vertical symmetrical center line 5, lateral symmetry center line 6, intersection point 7, connecting portion 8, chase 9, reflectance volume face and the line of demarcation 10, planar section 300, the cambered surface part 301 that reflect three-dimensional face.
The specific embodiment
The utility model provides the array structure of the secondary optical lens of a kind of secondary optical lens of light emitting diode and this light emitting diode.
The structure of these LED lens referring to Fig. 1 to structure shown in Figure 4.The first half profile of lens is the peanut shape of profile symmetry.The main body 1 of lens comprises the crown 4 of top perspective and bottom surface 3 these two faces of following solid.The center of bottom surface 3 is intersection point 7 positions of vertical symmetrical center line 5 in bottom surface and lateral symmetry center line 6.Vertically symmetrical center line 5 is the bottom surface symmetrical center line on the lens body length direction, and lateral symmetry center line 6 is the bottom surface symmetrical center line on the body width direction.
Be provided with the LED lamp chamber 2 of stretching into body interior on the bottom surface 3 of main body 1, LED lamp chamber 2 is a semicircular cavities.LED lamp chamber 2 is located on the lateral symmetry center line 6, and with respect to vertical central axis 5 asymmetric settings, i.e. the misalignment intersection point 7 in LED lamp chamber 2.The misalignment intersection point 7 position 1.0mm～1.4mm in LED lamp chamber 2.
The top bore of bottom surface 3 is greater than the bottom bore, and intersection point 7 is a bottom centre.Referring to Fig. 1～Fig. 4, it comprises planar section 300 and cambered surface part 301, and wherein planar section 300 is a datum level, cambered surface part 301 is for having the three-dimensional reflecting surface to crown 4 reflection rays, finish the reflection task by cambered surface part 301, at this moment, cambered surface part 301 is a camber line with the intersection of axial section.Axial section structure chart as shown in Figure 4, cambered surface part 301 account for whole bottom surface 3 what design as required.The arch section 301 and the plane of refraction 4 of bottom surface 3 are docking together.
Second kind of situation of bottom surface 3 is: bottom surface 3 has only cambered surface part 301, and does not have planar section 300.This structure does not have above-mentionedly have the structure of planar section 300 superior, particularly when the LED lamp is installed, seems very inconvenient.
In addition, in some design, reflecting surface and axial section intersection also can be straight lines, and promptly reflecting surface is the table top with certain inclination angle.
LED array structure thereof of the present utility model as shown in Figure 5, the array shown in the figure is made up of 12 LED lens.
Referring to Fig. 6, Fig. 7 and shown in Figure 8, between per two adjacent lenses connecting portion 8 is arranged, connecting portion 8 has chase 9 with 3 junctions, bottom surface of lens, and the chase face of chase 9 is three-dimensional cambered surface.
Distribution of light principle of the present utility model such as Fig. 9 and shown in Figure 10.Dotted line is a light among the figure.
Fig. 9 is that the slit is filled up with silica gel after placing the LED lamp in the LED lamp chamber, the schematic diagram of the lateral luminous scope of lens, and when this light emitting region of lens is represented it as street lamp, the actual scope that can shine that can be on the width of roadway direction.As shown in Figure 9, in fact this asymmetric in a lateral direction setting has limited the light scope of sending to the left, and has enlarged the scope that light sends to the right, so just well makes the road surface obtain centralized lighting, has improved illumination efficiency.
Figure 10 is after placing the LED lamp in the LED lamp chamber, the schematic diagram of the vertical light emitting region of lens, and when this light emitting region of lens is represented it as street lamp, can be along the actual scope that can shine on the length direction on road.As shown in Figure 10, because the effect of the bottom surface 3 of curved reflecting surface, the light (stereoscopic beam) that makes the LED lamp press close to bottom surface 3 to send all is used effectively, and promptly reflectance volume face and the light that sends of line of demarcation 10 below of the three-dimensional face of refraction are all by ejaculation after 3 reflections of bottom surface.Light in this stereoscopic beam angle obtains utilizing, thereby improves the utilization ratio of light.