CN102287665A - LED (Light Emitting Diode) luminescence device - Google Patents
LED (Light Emitting Diode) luminescence device Download PDFInfo
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- CN102287665A CN102287665A CN201110276531XA CN201110276531A CN102287665A CN 102287665 A CN102287665 A CN 102287665A CN 201110276531X A CN201110276531X A CN 201110276531XA CN 201110276531 A CN201110276531 A CN 201110276531A CN 102287665 A CN102287665 A CN 102287665A
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Abstract
The invention relates to an LED (Light Emitting Diode) luminescence device. The high-performance LED luminescence device is realized based on a principle of guiding light beams emitted by luminescence semiconductor elements and can effectively solve a current problem of LED luminous efficiency.
Description
Technical field
The present invention relates to a kind of LED light-emitting device, light-emitting device comprises a luminescent diode component and lens, and the light beam guiding that lens are used for luminescent diode component is sent is penetrated by certain direction.
Technical background
Semiconductor light sources progressively enters lighting field as the long-life light source of new generation of a kind of environment-friendly high-efficiency.
Disclose a kind of LED street lamp and lens thereof as Chinese invention patent application CN101105272A, these lens comprise the plane of incidence and exit facet, and the middle part, first side of lens is provided with one and supplies LED to be installed on its interior pit, and the hole wall of pit constitutes the described plane of incidence; Middle part, lens second side arc protrudes and forms the exit facet that is pillow-like; And lens first side is provided with a circle with the fully reflecting surface of light reflection to exit facet around pit.The exit facet of this lens generally all is spherical or aspheric smooth curved surface, can adjust beam angle to distribute again.Just disclosed between the curvature of lens exit facets and the beam angle as Chinese invention patent application CN101169232A and to have relevance, promptly the beam angle of the big more correspondence of the curvature of exit facet is just more little.Therefore, make lens have certain spotlight effect, the exit facet of lens just must have certain curvature, thereby the thickness that makes lens can not be done too thinly, general 3-9mm at least, it is long that light penetrates distance in the lens medium material like this, causes the light loss loss-rate more serious.U.S. Pat 6607286 discloses a kind of LED lens that have sawtooth, as shown in Figure 1, LED unit 40 comprises pedestal 42 and lens 44, between pedestal 42 and lens 44, form a cavity volume 54, led chip 52 is located in the cavity volume 54, and the center of pedestal 42 and lens 44 is also passed through in the axis 43 of LED unit.The side of lens 44 is provided with sawtooth portion 56, the surface of sawtooth forms ray refraction exit facet 59, the end face of saturating ytterbium 44 is provided with pars infundibularis 58, the wall of pars infundibularis 58 constitutes fully reflecting surface, light can be reflexed to sawtooth portion 56, and penetrate with the angle that is approximately perpendicular to axis 43 by the side of saturating ytterbium 44, and another part light also penetrates with the angle that is approximately perpendicular to axis 43 directly by after 59 refractions of refraction exit facet.Therefore, the effect of lens 44 is to realize lateral emitting.Obviously, because pars infundibularis 58 specific curve form and sawtooth portion 56 each sawtooth are arranged above and below, the thickness of this lens also can not be very thin, and the low defective of light extraction efficiency is also arranged.
Summary of the invention
The technical problem that the present invention will solve provides the lens that a kind of thickness is thinner, light extraction efficiency is higher.In order to solve this technical problem, the present invention adopts following technical scheme: the lens that a kind of light-emitting device is used, comprise the plane of incidence and refraction exit facet, described lens are thin slice shape, the bottom surface of lens is the plane of incidence, the end face of lens is provided with the sawtooth of multi-ring annular, and these sawtooth of specification are arranged inside and outside the middle mind-set edge of lens, and the medial surface of sawtooth and lateral surface constitute described refraction exit facet.The present invention utilizes the surface of sawtooth to realize the allotment of light angle, and to utilize smooth curved surface to allocate light different with prior art, and the present invention can realize specific beam angle by the side angle of reasonable disposition sawtooth.Each sawtooth among the present invention adopts the arrangement mode of the little ring of big ring sleeve, can reduce the thickness of lens as much as possible, thereby reduces the loss of light in lens, improves light extraction efficiency.Utilize very thin thickness, just can realize less beam angle.These lens are used in semiconductor lamp can improve Luminaire efficiency, and product structure can be realized ultra-thinization design.Preferably, described lens are circular or oval, and the sawtooth of lens end face also is annular or oval ring.Preferably, described lens are polygon, and the sawtooth of lens end face also is corresponding polygon.Further, described polygonal limit number is more than or equal to 4.Preferably, in the cross section through the lens centre, the cross section contour of described sawtooth is a straight line.Further, from inside to outside, the angle of the medial surface of described sawtooth and lens axis increases successively, and the angle of the lateral surface of described sawtooth and lens axis reduces successively.Preferably, in the cross section through the lens centre, the cross section contour of described sawtooth is a curved line.Preferably, the side of described lens also is provided with fully reflecting surface.Further, the angle of the described fully reflecting surface and the plane of incidence is greater than 135, less than 180.
Preferably, the refractive index of described lens is 1.2-1.8.Another technical problem that the present invention will solve provides the higher light-emitting device of a kind of light extraction efficiency.In order to solve this technical problem, the present invention adopts following technical scheme: a kind of light-emitting device, comprise light source and the lens that place light source the place ahead, described lens are thin slice shape, the bottom surface of lens is the plane of incidence, the end face of lens is provided with the sawtooth of multi-ring annular, and these sawtooth are arranged inside and outside the middle mind-set edge of lens, and the medial surface of sawtooth and lateral surface are the refraction exit facet.Preferably, the side of described lens also is provided with fully reflecting surface.Utilize the total reflection principle of light, the effective exiting surface of side turn light rays that light source is sent, and be directed in the beam angle of design, improve light utilization.Preferably, described light source is a luminescent diode component.Further, described luminescent diode component is LED.Preferably, also be filled with boundary material between described light source and the lens.Further, the refractive index of described lens is 1.2-1.8, and described boundary material is the transparent material of refractive index between 1.4-1.8.Light-emitting device of the present invention is on the basis of satisfying the requirement of optical design distribution curve flux, and it is ultra-thin to have thickness, the light extraction efficiency height, and the three big characteristics that stray loss light is few help the design performance of light fixture product.
Description of drawings
Fig. 1 is existing a kind of light-emitting device schematic diagram with lens.
Fig. 2 is the profile of a kind of lens of the present invention.
Fig. 3 is a kind of profile with lens of linear pattern sawtooth profile of the present invention.
Fig. 4 is the fundamental diagram of lens of the present invention.
Fig. 5 is a kind of profile with lens of arc line type sawtooth profile of the present invention.
Fig. 6 is the vertical view of a kind of round lens of the present invention.
Fig. 7 is the vertical view of a kind of oval lens of the present invention.
Fig. 8 is the vertical view of a kind of polygon lens of the present invention.
Fig. 9 is a kind of light-emitting device schematic diagram with lens of the present invention.
Figure 10 is the operation principle schematic diagram of light-emitting device shown in Figure 9.
Figure 11 is a kind of curve of light distribution figure of luminescent diode component.
Figure 12 is the curve of light distribution figure of the light-emitting device of the present invention with lens.
The specific embodiment
At first as Fig. 2, shown in Figure 3, the lens 10 that a kind of light-emitting device of the present invention is used are thin slice shape, and its bottom surface is the plane of incidence 11.The end face of lens is provided with the sawtooth 13 of multi-ring annular, and these sawtooth 13 are arranged inside and outside the middle mind-set edge of lens, and the arrangement mode of the little ring of this big ring sleeve can more clearly show from Fig. 6, Fig. 7 and Fig. 8.Continuation is with reference to Fig. 2, Fig. 3, and the medial surface 132 of sawtooth and lateral surface 131 constitute the refraction exit facet of lens.In the cross section through the lens centre, the cross section contour of these sawtooth 13 is a straight line.A kind of preferred mode is, the angle of these sawtooth has nothing in common with each other, the putting in order of (by the center to the edge) according to from inside to outside, the angle of establishing each sawtooth lateral surface 131 and lens axis 14 is followed successively by A1, A2, A3 ..., so 90＞A1＞A2＞A3＞... 〉=0; If each sawtooth medial surface 132 is followed successively by B1, B2, B3 with the angle of lens axis 14 ..., so 0＜B1＜B2＜B3＜...＜90.The side of lens becomes an obtuse angle C with the bottom surface, the angle of this side satisfies the requirement of total reflection, makes the light that projects this side can all be reflected to above-mentioned refraction exit facet, thereby preferably this side, 135＜C＜180 constitutes the fully reflecting surface 12 of lens.The operation principle of these lens as shown in Figure 4 because light is when high refractive index medium (lens) enters low refractive index dielectric (air), can be at deflection that shooting angle takes place at the interface or total reflection phenomenon.After light entered lens from the plane of incidence, a part of light was directly penetrated by the refraction exit facet, shown in the L1 among the figure, L3, L5; Some light is penetrated by the refraction exit facet more earlier through after primary event, shown in the L2 among the figure, L4, L6, in the present embodiment, the angle of emergent ray and vertical direction all be controlled at design ± 10 ° of scopes in, form about 20 ° of new beam angle.The present invention by the method for many planes of refraction angle is set, makes the reduction of lens thickness become possibility under the prerequisite that does not increase lens thickness, utilizes the angle of serrated surface to realize the allotment of light angle, thereby realizes specific beam angle.As shown in Figure 5, this is the lens of another profile of tooth, and in the cross section through the lens centre, the cross section contour of sawtooth is a curved line.Though tooth profile is different, its operation principle is the same with the lens of linear flank profil.As Fig. 6, Fig. 7, shown in Figure 8, lens can be circle, ellipse or polygon, and polygonal limit number is more than or equal to 4, and the sawtooth 13 of lens end face correspondingly also is annular, oval ring or polygon.Each sawtooth among the present invention adopts the inside and outside arrangement mode of the little ring of big ring sleeve, rather than parallel up and down arrangement mode, as long as the angle of each sawtooth of appropriate design just can realize desired beam angle.Therefore, the present invention can reduce the thickness of lens to greatest extent, and lens thickness is less than 5mm, and best implementation thickness is less than 0.8mm, thereby the loss of minimizing light in lens improves light extraction efficiency, and can realize the ultra-thinization design of product structure.As shown in Figure 9, place the place ahead of a light source 30 can form light-emitting device of the present invention said lens 10, light source adopts packaged luminescent diode component LED.Packaged luminescent diode component LED comprises package support or substrate, lead-in wire, sealing, because this is a known technology, so no longer explanation.The center of luminescent diode component exiting surface and the center of lens are on the same vertical line on the direction perpendicular to lens bottom surface 11 basically.Also be filled with boundary material 20 between light source 30 and the lens 10, boundary material 20 can be any material that comprises the printing opacity of air, and more satisfactory material is the transparent material of refractive index between 1.4-1.8, can be resin materials such as silica gel, epoxy.The light that lens 10 are used for that luminescent diode component is sent guides to the refraction exit facet and penetrates, and the refractive index of lens 10 is good especially between 1.2-1.8.The operation principle of this light-emitting device as shown in figure 10 because the effect of lens can obtain less beam angle.By the contrast of Figure 11 and Figure 12, can more be clear that the allotment effect of lens to light, Figure 11 is a kind of curve of light distribution figure of luminescent diode component, can see, its light distribution is in the angular range of broad; Figure 12 is luminescent diode component combines the light-emitting device of back formation with lens of the present invention curve of light distribution figure, can see that its light intensity concentrates in the less angular range.
Below manufacture method of the present invention is described.
A kind of preparation method of light-emitting device of the present invention is: after treating lens machine-shaping, lens arrangement to luminescent diode component, is adopted the space between boundary material filling lens and the luminescent diode component.
The another kind of preparation method of light-emitting device of the present invention is: in advance luminescent diode component is put into the mould of lens, carried out the lens moulding then, so just need not carry out the assembling of lens again and install, lens are molded directly within on the luminescent diode component.Another processing method is, will have thixotropic light-permeable colloidal material earlier and annotate top in luminescent diode component, by with the mould pressing, makes light-permeable colloidal material surface form the said lens structure then.The manufacture method of said lens and light-emitting device all is known technologies, is not described further at this.
Claims (3)
1. a LED light-emitting device is characterized in that light-emitting device comprises a luminescent diode component and lens, and the light beam guiding that lens are used for luminescent diode component is sent is penetrated by certain direction.
2. LED light-emitting device, it is characterized in that the lens that light-emitting device is used, comprise the plane of incidence and refraction exit facet, described lens are thin slice shape, the bottom surface of lens is the plane of incidence, the end face of lens is provided with the sawtooth of multi-ring annular, and these sawtooth of specification are arranged inside and outside the middle mind-set edge of lens, and the medial surface of sawtooth and lateral surface constitute described refraction exit facet.
3. a LED light-emitting device is characterized in that device on the basis of satisfying the requirement of optical design distribution curve flux, and it is ultra-thin to have thickness, light extraction efficiency height, the three big characteristics that stray loss light is few.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110276531XA CN102287665A (en) | 2011-09-16 | 2011-09-16 | LED (Light Emitting Diode) luminescence device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110276531XA CN102287665A (en) | 2011-09-16 | 2011-09-16 | LED (Light Emitting Diode) luminescence device |
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| CN102287665A true CN102287665A (en) | 2011-12-21 |
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| CN201110276531XA Pending CN102287665A (en) | 2011-09-16 | 2011-09-16 | LED (Light Emitting Diode) luminescence device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105578968A (en) * | 2013-09-30 | 2016-05-11 | 株式会社理光 | Diagnostic ultrasound apparatus and method for operating diagnostic ultrasound apparatus |
| CN106764939A (en) * | 2016-12-06 | 2017-05-31 | 中山大学 | A kind of collimation lens for eliminating veiling glare |
-
2011
- 2011-09-16 CN CN201110276531XA patent/CN102287665A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105578968A (en) * | 2013-09-30 | 2016-05-11 | 株式会社理光 | Diagnostic ultrasound apparatus and method for operating diagnostic ultrasound apparatus |
| US10039452B2 (en) | 2013-09-30 | 2018-08-07 | Ricoh Company, Ltd. | Optical sensor, optical testing device, and optical characteristic detection method |
| CN105578968B (en) * | 2013-09-30 | 2019-03-15 | 株式会社理光 | Optical sensor, optical test equipment and optical characteristics detection method |
| CN106764939A (en) * | 2016-12-06 | 2017-05-31 | 中山大学 | A kind of collimation lens for eliminating veiling glare |
| CN106764939B (en) * | 2016-12-06 | 2019-05-17 | 中山大学 | A kind of collimation lens for eliminating stray light |
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Application publication date: 20111221 |