CN102072456B - LED spherical light distribution lens - Google Patents
LED spherical light distribution lens Download PDFInfo
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- CN102072456B CN102072456B CN2010105116415A CN201010511641A CN102072456B CN 102072456 B CN102072456 B CN 102072456B CN 2010105116415 A CN2010105116415 A CN 2010105116415A CN 201010511641 A CN201010511641 A CN 201010511641A CN 102072456 B CN102072456 B CN 102072456B
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- reflecting surface
- lens
- light
- lens body
- distribution
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Abstract
The invention relates to an LED spherical light distribution component, in particular to an LED spherical light distribution lens, which comprises a cylindrical lens main body. The bottom of the cylindrical lens is provided with a mounting base, while the top is provided with a reflecting surface used for reflecting the light from the bottom out of the lens main body, wherein the reflecting surface is a pyramidal concave surface with a multi-section structure. Compared with the prior art, the light intensity distribution of the spherical space of the lens has larger scope and better uniformity.
Description
Technical field
The present invention relates to a kind of LED luminous intensity distribution parts, specifically is LED sphere light-distribution lens.
Background technology
Because the luminescence efficiency of LED〉70Lm/W, much larger than the luminescence efficiency (15Lm/W) of incandescent lamp.The LED replace incandescent is just becoming a hot spot technology of global energy-saving illumination, but have unidirectional characteristics owing to LED is luminous, can not satisfy some omnibearing luminous application requirements of incandescent lamp, using secondary optical system to make unidirection luminous led light source convert approximate omnibearing luminous light source to is the technology that current market need solve.Any light distribution of measuring face all is the curve of an approximate center circle on the space centered by the luminophor on omnibearing luminous surface. and except cap part, remainder all should be similar to a circular curve centered by light source. and this curve more sub-circular represents that the light distribution is more even.
Chinese invention patent application specification CN101718414 A discloses a kind of lens for led light source.These lens comprise cylindrical first phacoid and are second phacoid of circular arc build that second phacoid is arranged on the top of first phacoid, and is provided with the top in second phacoid towards the coniform reflecting surface of first phacoid bottom.Its luminous intensity distribution principle is: LED light first phacoid bottom enters first phacoid, because LED light has one-way, reflecting surface in direct directive second phacoid of most of light and be reflected onto whole spherical space, a part of light then directly penetrates first phacoid, in addition, part light is also arranged in the first phacoid internal face generation total reflection, and final directive reflecting surface.
Fig. 6 is the distribution curve flux of said lens, and curve 61,62 is respectively the light intensity distributions curve (distribution curve flux) in C0 plane and the C90 plane among this figure.Wherein, the C0 plane refers to a certain plane by first phacoid, 1 axis, and the C90 plane is for by the first phacoid axis and perpendicular to the plane on CO plane.Distribution curve flux 61 among Fig. 6 and the shape of curve 62 are roughly the same, and this and this lens integral body structure axisymmetricly matches.
But can obviously find out following problem of existing of these lens from Fig. 6:
(1) the light intensity space distribution is even inadequately
For example among Fig. 6,0 ° of light intensity to 20 ° of scopes is obviously greater than 40 ° of light intensity to 90 ° of spaces, and obviously to successively decrease appear in 20 ° of light distribution to 40 ° of scopes, and the light intensity distributions of lens integral body is reasonable inadequately.
(2) light distribution angle is spent narrow
In the illustration 6,70 ° of light intensity to 90 ° of scopes reduce comparatively fast, and 90 ° to 180 ° scopes are the dark space.The effective lighting angle of lens integral body is narrow.
In sum, provide a kind of light intensity space distribution comparatively evenly and the wider LED sphere light-distribution lens of light distribution angle degree is technical issues that need to address.
Summary of the invention
The technical matters that the present invention solves provides a kind of light intensity space distribution comparatively evenly and the wider LED sphere light-distribution lens of light distribution angle degree.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of LED sphere light-distribution lens, it comprises the lens body that is column, this lens body bottom is provided with mounting seat, and its top is provided with for reflecting the reflecting surface of lens body from the light of this bottom, and wherein: described reflecting surface is the concave surface that is the multi-segment structure of taper.So-called multistage refers to that reflecting surface is made of the multiple reflection face portion.Among the present invention, reflecting surface is that concave surface or convex surface are to compare with contour isometrical circular conical surface.
As one of improving: described reflecting surface is three stage structure, it comprises successively and to connect: the reflection angle scope is towards first reflecting surface part of lens body bottom section, the reflection angle scope second reflecting surface part towards the lens body central region, and the reflection angle scope is towards the 3rd reflecting surface part of lens body top area.Adopt the benefit of the reflecting surface of this three stage structure to be, when first reflecting surface part and the 3rd reflecting surface partly reflector space and after light distribution determines substantially, the light distribution of second reflecting surface part can be taken into account the light intensity distributions of all the other two reflectings surface parts simultaneously, namely can partly regulate the stack scope of itself and all the other light distribution between the two by second reflecting surface.Therefore only need to change second reflecting surface part and both can regulate whole light distribution, make things convenient for the designer to obtain the uniform lens of luminous intensity distribution at different condition designs.
As two of improvement: the bigger bottom circular cone table top in angle centered by described first reflecting surface part, described second reflecting surface partly be the middle part arc surface, described the 3rd reflecting surface partly centered by the less top circular conical surface in angle.
As three of improvement: between the described adjacent reflecting surface part for seamlessly transitting.If the transition between the adjacent reflecting surface part is unsmooth, in the sudden change that the light reflection will take place of junction, being reflected on the distribution curve flux then is tangible flex point.Distribution curve flux the aperture phenomenon occurs easily in flex point, influences illuminating effect.
As four of improvement: described lens body bottom is provided with recess.
As five of improvement: the junction of described lens body and described mounting seat, and/or the junction of described lens body and described reflecting surface is provided with the transition face curved surface.And should seamlessly transit same reason between the adjacent reflecting surface part, the junction of lens body and miscellaneous part also should seamlessly transit.
Compared with prior art, the invention has the beneficial effects as follows:
(1) light intensity distributions is even
Reflecting surface directive lens body inwall gets a part of light and can reflect, and another part light then total reflection can take place, and wherein reflect the light intensity that can't detract, and total reflection can cause weakening of light intensity.Because position special between led light source, reflecting surface and the lens body internal face three concerns, and led light source and nonideal pointolite, make that the light intensity of reflecting surface emergent ray is ubiquitous because of the phenomenon that total reflection detracts.Therefore each section circular conical surface, concave surface or the light intensity distributions of convex surface in its reflection angle scope all are inhomogeneous.And the reflecting surface of invention adopts multi-segment structure, although the light distribution of each section reflecting surface remains inhomogeneous, can obtain distribution light intensity distributions curve more uniformly by stack combinations between each section reflecting surface.
(2) the light distribution angle degree is wideer
Owing to be the form that adopts the concave surface that is taper, so the light distribution angle degree is bigger than the reflection angle scope of the reflecting surface that adopts the circular conical surface form.
Description of drawings
Fig. 1 is the stereographic map of the lens of embodiment of the present invention;
Fig. 2 is the cut-open view of the lens of embodiment of the present invention;
Fig. 3 is the synoptic diagram of reflecting surface structure of the lens of embodiment of the present invention;
Fig. 4 is the light path synoptic diagram of the lens of embodiment of the present invention;
Fig. 5 is the distribution curve flux figure of the lens of embodiment of the present invention;
Fig. 6 be the disclosed lens of CN101718414 A distribution curve flux figure.
Embodiment
As shown in Figures 1 to 3, the LED sphere light-distribution lens of present embodiment comprises the lens body 11 that is column, the bottom 11 of this lens body 1 is provided with mounting seat 20, and the top 12 of this lens body 1 is provided with for reflecting the reflecting surface 30 of lens body 1 from the light of this bottom.In order to obtain light distribution more uniformly in spherical space, then this reflecting surface is preferably the surface of revolution, and this lens body is preferably solid of revolution.But reflecting surface and lens body are modified as off-gauge surface of revolution or solid of revolution slightly, as long as its distribution curve flux is roughly reasonable, and the light distribution deviation is in the ND scope of people's vision, and then this distortion also allows.
In the present embodiment, this reflecting surface is the concave surface that is the multi-segment structure of taper.Reflecting surface concavo-convex be relatively and the contour isometrical circular conical surface of reflecting surface relatively determine.So-called multisection type refers to that its bus is made up of the multistage line, both can all adopt straight-line segment or segment of curve, also can adopt the forms such as combination of straight-line segment and segment of curve.
As Fig. 3, this reflecting surface comprises successively and to connect: the reflection angle scope is towards the first reflecting surface part 31 of lens body bottom section, the reflection angle scope second reflecting surface part 32 towards the lens body central region, and the reflection angle scope is towards the 3rd reflecting surface part 33 of lens body top area.The bigger bottom circular cone table top 31 in angle centered by this first reflecting surface part, this second reflecting surface partly are the less top circular conical surface 33 in angle centered by middle part arc surface 32, the three reflectings surface part.
When though reflecting surface integral body is curved surface (for example the bus of reflecting surface is concave curve), the photodistributed angle also angle than existing circular cone type reflecting surface is big, but the photodistributed angle of arbitrary surface and intensity are not easy control, design lighting angle suitable (at least 20 ° to the 120 ° scopes) and the uniform lens of light intensity distributions, difficulty is quite big.And for the reflecting surface of present embodiment, the bottom circular cone table top 31 that the slip-stick artist can be earlier be easier to control by light path and the light intensity in two zones of top circular conical surface 33 controls, and then with the middle part arc surface light distribution of integral body is regulated or compensated.Namely narrower, the light intensity distributions of light distribution angle degree by the comprehensive utilization circular conical surface is than the characteristics that are easier to control, and the wider characteristics of curved surface light distribution angle degree, solved the not good and irrational difficult problem of light distribution angle degree of existing sphere light-distribution lens light intensity distributions homogeneity dexterously.
In addition, for further improving the homogeneity of the light distribution of lens, the bottom of lens body 1 also is provided with recess 13.The bottom of existing sphere light-distribution lens is the problem that the plane will cause two aspects: be on the one hand, has one-way owing to LED is luminous, therefore be positioned at the wide part that lens bottom LED sends and directly concentrate the coniform reflecting surface at directive lens top, make near the lens top spatial light intensity excessive (0 ° of-20 ° of zone among Fig. 6).Be because LED and lens base plane have certain interval, to make a part of partial L ED light leak on the other hand.And the recess 13 that these lens bottom arranges can carry out LED light disperse (similar with the concavees lens principle) to a certain degree, reduced the light quantity of direct directive reflecting surface, increased simultaneously and directly penetrate the homogeneity that lens body 1 wall (the total reflection part does not take place) directive oblique upper (20 ° of-60 ° of scopes among Fig. 5) helps to improve the whole luminous intensity distribution of lens.
In addition, in order to eliminate the aperture that lens produce in use, the junction of lens body 1 and mounting seat, and/or the junction of lens body 1 and reflecting surface is provided with fillet surface, and be designed to seamlessly transit between the adjacent reflecting surface part.As shown in Figure 5, the distribution curve flux of the disclosed lens of CN101718414 A has an apparent in view recess or protuberance near 60 °, 40 ° and 10 °.In actual use, comparatively significantly aperture can appear in these flex point places.Why cause its distribution curve flux obvious flex point to occur, it is main because there is obvious edges and corners in first phacoid of these lens bottom with mount pad junction, second phacoid and the first phacoid junction, circular cone reflecting surface and the second phacoid wall contact position, cause occurring significantly concentrating or disperseing from these local outgoing or reflection ray, directly cause the generation of aperture.Present embodiment is arranged to fillet surface with these binding sites, realizes seamlessly transitting, and can eliminate aperture.
Fig. 4 is the light path synoptic diagram of these lens in a certain cross section of process lens axis.40 is led light source among this figure, and 41,42,43 are respectively led light source 40 with respect to the mirror image of the respective bus bars on first to the 3rd reflecting surface part right side.Can find out intuitively that from Fig. 4 the shooting angle scope of first to the 3rd reflecting surface is respectively bottom section, central region and the top area of lens body, the shooting angle scope of the recess of lens body is the oblique upper zone of lens body.
Fig. 5 is the light intensity spatial distribution map of these lens.Curve 51,52 is respectively the light intensity distributions in C0 plane and the C90 plane among this figure.Wherein, the coordinate center is light source center, and the C0 plane refers to a certain plane of scioptics main body 1 axis, and the C90 plane is for by the first phacoid axis and perpendicular to the plane on CO plane.As can be seen from Figure 5, the light distribution uniformity coefficient of these lens obviously improves, and the concavo-convex position transition of distribution curve flux is comparatively level and smooth, can not produce tangible aperture effect.And effectively the light distribution range is extended to 0 ° to 15 °.
In general, light intensity in the multisection type reflecting surface of the lens of present embodiment can increase among Fig. 5 60 ° to 160 ° scopes to greatest extent, the recess of lens bottoms can reduce the amount of light of reflecting surface to a certain extent and strengthen among Fig. 5 20 ° to 60 ° light intensity, thereby make the expanded range of spherical space light distribution of these lens, the homogeneity of light distribution improves, nor tangible aperture can appear, have outstanding substantive distinguishing features and progress.
Claims (5)
1. LED sphere light-distribution lens, it comprises the lens body (1) that is column, this lens body bottom (11) is provided with mounting seat (20), this lens body (1) top (12) is provided with for reflecting the reflecting surface (30) of lens body (1) from the light of this bottom (11), it is characterized in that: described reflecting surface (30) is the concave surface that is the multi-segment structure of taper, described reflecting surface comprises a plurality of reflecting surface parts, described reflecting surface is three stage structure, comprise successively and to connect: the reflection angle scope is towards first reflecting surface part (31) of lens body (1) bottom section, the reflection angle scope is towards second reflecting surface part (32) of lens body (1) central region, and the reflection angle scope is towards the 3rd reflecting surface part (33) of lens body (1) top area.
2. LED sphere light-distribution lens according to claim 1, it is characterized in that: the bigger bottom circular cone table top in angle centered by described first reflecting surface part (31), described second reflecting surface part (32) is the middle part arc surface, the less top circular conical surface in angle centered by described the 3rd reflecting surface part (33).
3. LED sphere light-distribution lens according to claim 1 and 2 is characterized in that: between the described adjacent reflecting surface part for seamlessly transitting.
4. LED sphere light-distribution lens according to claim 1 and 2 is characterized in that: be provided with recess (13) bottom the described lens body.
5. LED sphere light-distribution lens according to claim 1 and 2 is characterized in that: the junction of described lens body and described mounting seat, and/or the junction of described lens body and described reflecting surface is provided with fillet surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105116415A CN102072456B (en) | 2010-10-19 | 2010-10-19 | LED spherical light distribution lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105116415A CN102072456B (en) | 2010-10-19 | 2010-10-19 | LED spherical light distribution lens |
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| Publication Number | Publication Date |
|---|---|
| CN102072456A CN102072456A (en) | 2011-05-25 |
| CN102072456B true CN102072456B (en) | 2013-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105116415A Expired - Fee Related CN102072456B (en) | 2010-10-19 | 2010-10-19 | LED spherical light distribution lens |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1779530A (en) * | 2004-11-24 | 2006-05-31 | 三星电子株式会社 | Side light-emitting device, backlight unit, and liquid crystal display apparatus |
| CN1885128A (en) * | 2005-06-24 | 2006-12-27 | Lg.菲利浦Lcd株式会社 | Backlight assembly including light emitting diode and display device including the same |
| CN101150159A (en) * | 2006-09-22 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | LED and its lens body |
| CN201047878Y (en) * | 2007-02-06 | 2008-04-16 | 深圳市中电淼浩固体光源有限公司 | Spreading lens for LED light source |
| CN101718414A (en) * | 2009-12-09 | 2010-06-02 | 特殊光电科技(中山)有限公司 | Lens for LED light source |
| CN201866703U (en) * | 2010-10-19 | 2011-06-15 | 王子能 | LED light distribution part |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738726A (en) * | 2008-11-08 | 2010-06-16 | 胡仕煜 | Method for designing free curved-surface reflector for illumination in annular region |
-
2010
- 2010-10-19 CN CN2010105116415A patent/CN102072456B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1779530A (en) * | 2004-11-24 | 2006-05-31 | 三星电子株式会社 | Side light-emitting device, backlight unit, and liquid crystal display apparatus |
| CN1885128A (en) * | 2005-06-24 | 2006-12-27 | Lg.菲利浦Lcd株式会社 | Backlight assembly including light emitting diode and display device including the same |
| CN101150159A (en) * | 2006-09-22 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | LED and its lens body |
| CN201047878Y (en) * | 2007-02-06 | 2008-04-16 | 深圳市中电淼浩固体光源有限公司 | Spreading lens for LED light source |
| CN101718414A (en) * | 2009-12-09 | 2010-06-02 | 特殊光电科技(中山)有限公司 | Lens for LED light source |
| CN201866703U (en) * | 2010-10-19 | 2011-06-15 | 王子能 | LED light distribution part |
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| CN102072456A (en) | 2011-05-25 |
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