CN105485557A - LED spot lamp - Google Patents
LED spot lamp Download PDFInfo
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- CN105485557A CN105485557A CN201410474943.8A CN201410474943A CN105485557A CN 105485557 A CN105485557 A CN 105485557A CN 201410474943 A CN201410474943 A CN 201410474943A CN 105485557 A CN105485557 A CN 105485557A
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Abstract
The invention provides an LED spot lamp. The LED spot lamp comprises an LED light source, a condensing lens and a reflection cup arranged outside the condensing lens. The condensing lens comprises an inner surface close to the LED light source, an outer surface away from the LED light source and an optical axis located in the center of the condensing lens. The inner surface comprises a ring surface surrounding the optical axis and a top surface, wherein the optical axis penetrates through the center of the top surface. Light entering the ring surface is refracted to the reflection cup, and light entering the top surface is refracted to the optical axis. Light transmitting through the ring surface is refracted by the outer surface, then emitted to the reflection cup and reflected by the reflection cup to form first emergent light parallel to the optical axis. Light transmitting through the top surface is refracted by the outer surface and then emitted so as to form second emergent light which is close to and parallel to the optical axis. After the technical scheme is adopted, through matching of reflection and transmission, LED spotlight high in central light strength, low in glare rating and uniform in light color can be obtained.
Description
Technical field
The present invention relates to lighting apparatus, particularly relate to a kind of LED spotlight.
Background technology
LED is used for lighting to have started to popularize, and the color quality of LED requires specifically showing up also more and more higher, and the photochromic Spreading requirements in photographed object face is more and more higher, meets the hommization demand of showing up.But LED is 180 ° of luminescences, it is serious that it has dazzle, the unequal feature of hot spot effect transition.And in shop, the commercial lighting field such as odeum, meeting room, need to use narrow angle light beam, this just needs LED to coordinate the Optical System Design of focused beam.
Gathering Beam Technique general at present adopts secondary total-reflection type lens, and lens are that the array of multiple lenslet integrates, and each lenslet carries out independent luminous intensity distribution to single LEDs, reaches the object of focused ray.But there is the shortcoming that intermediate obstacles leaves ghost image on face to be illuminated in this technology; Another technology adopts reflector, and reflector directly focuses on to the LED of COB (chip on board encapsulation) object reaching luminous intensity distribution, and this technology exists again the photochromic defect that can not mix completely, thus produce yellow circle.
Therefore, need a kind of novel LED spotlight badly, it is better to the spotlight effect of LED light source, has the congregational rate reducing ghost image, dazzle, and its light center light intensity of assembling is high, and hot spot is even.
Summary of the invention
In order to overcome above-mentioned technological deficiency, the object of the present invention is to provide a kind of LED spotlight.
The invention discloses a kind of LED spotlight, comprise: LED light source, collector lens and the reflector be located at outside described collector lens, described collector lens comprises the inner surface near described LED light source, the outer surface away from described LED light source and is positioned at the optical axis at described collector lens center; Described inner surface comprises the end face that anchor ring and center around described optical axis are passed by described optical axis; The light being incident to described anchor ring reflects to described reflector direction, and the light being incident to described end face reflects to described optical axis; To described reflector, and gone out to be parallel to the first emergent light of described optical axis by described reflective cup reflects from the outgoing after described outer surface refraction of the light of described anchor ring transmission; From the outgoing after described outer surface refraction of the light of described end face transmission, formed one near and be parallel to the second emergent light of described optical axis.
Preferably, described outer surface in the semicircle that is symmetry axis with described optical axis or class semicircle.
Preferably, described end face is the convex surface to described LED light source projection.
Preferably, on described outer surface, the part of the second emergent light described in outgoing is the convex lens face of a protrusion direction away from described LED light source.
Preferably, described convex lens face is made through cloudy surface frosted.
Preferably, the width of described LED light source and described collector lens enclose the ratio of the cavity width of formation between 50% ~ 75% towards the inner surface of described LED light source.
Preferably, the light reflected from described end face and the angle of described optical axis are 0-20 °; The angle of the light reflected from described anchor ring and described optical axis is 20-70 °.
Preferably, described anchor ring is the face of cylinder.
Preferably, described end face and described anchor ring are connected to a point of interface; When the distance of described point of interface and described LED light source increases, the angle of the light that described end face reflects and described optical axis increases, and the angle of the light that described anchor ring reflects and described optical axis reduces; When the distance of described point of interface and described LED light source reduces, the angle of the light that described end face reflects and described optical axis reduces, and the angle of the light that described anchor ring reflects and described optical axis increases.
Preferably, the angle of the light and described optical axis that are projected to described reflector after described outer surface refraction is 50-80 °.
Preferably, described LED light source is multiple, is equipped with collector lens described in outside LED light source described in each; Multiple described collector lens forms a collector lens group.
After have employed technique scheme, compared with prior art, there is following beneficial effect:
1. the light center light intensity obtained after assembling is high, dazzle value is low, hot spot is even;
2. the size of reflector reduces greatly, and reduction takes up room.
Accompanying drawing explanation
Fig. 1 is structure and the bright dipping schematic diagram of LED spotlight in one embodiment of the present invention.
Fig. 2 a is the first perspective view of collector lens of the present invention;
Fig. 2 b is the second perspective view of collector lens of the present invention.
Reference numeral:
10-collector lens, 11-inner surface, 111-anchor ring, 112-end face, 12-outer surface, 121-convex lens face, 13-optical axis, 14-stationary plane;
20-reflector;
30-LED light source.
Detailed description of the invention
Advantage of the present invention is set forth further below in conjunction with accompanying drawing and specific embodiment.
Consulting Fig. 1, is the structural representation of LED spotlight in one embodiment of the invention.LED spotlight includes and is placed in inner LED light source 30, be located at the collector lens 10 that LED light source 30 outside is used as to assemble the bright dipping of LED light source 30, and is located at collector lens 10 external application and opposes the reflector 20 that the light that transmits from collector lens 10 carries out reflecting.
Composition graphs 1, Fig. 2 a and Fig. 2 b, collector lens 10 includes an inner surface 11 near LED light source 30, the outer surface 12 away from LED light source 30 and is positioned at the optical axis 13 at collector lens 10 center, then first the bright dipping of LED light source 30 will be incident upon in collector lens 10 from this inner surface 11, then penetrate from outer surface 12.Collector lens 10 is arranged in the spatial accommodation of reflector 20 formation by an installation foundation (not shown), and reflector 20 is supported on this installation foundation equally.In order to make collector lens 10 and reflector 20 transmission, reflection coordinates the light center light intensity of injection higher, and zero lap shadow, then the light of transmission and reflection should mutual independent outgoing.Therefore, configure as follows to collector lens 10: inner surface 11 includes anchor ring 111 and end face 112, and anchor ring 111 is arranged around optical axis 13, thus around LED light source 30, optical axis 13 then through end face 112, namely end face 112 just to LED light source 30 or and optical axis 13 slightly offset plane to LED light source 30.Because the different position of different transmission plane is arranged, and the refraction principle of light, make the light injecting anchor ring 111 and end face 112 different through first time refraction post deflection direction, be incident to the light of the anchor ring 111 being positioned at side to reflector 20 i.e. outwards refraction, and the light being incident to the end face 112 being positioned at end face reflects to optical axis 13.Then after primary refraction, the light path being incident upon the light of anchor ring 111 and end face 112 is divided to be separated.And the bright dipping of LED light source 30 is when penetrating from this outer surface 12, birefringence is carried out by this outer surface 12,, and to penetrate from the light-emitting window of reflector 20 after outer surface 12 reflects from the light of end face 112 transmission from the outgoing after outer surface 12 reflects of the light of anchor ring 111 transmission to reflector 20.After this birefringence, the light path being incident upon the light of anchor ring 111 and end face 112 is divided to be separated further, reflector 20 is incident upon in an angle by the light of anchor ring 111 transmission and optical axis 13, and reflected by reflector 20 and collimate thus penetrate the first emergent light A of parallel optical axis 13, formed after birefringence near optical axis 13 by the light of end face 112 transmission and be parallel to the second emergent light B of optical axis 13.Wherein, the first emergent light concentrates on reflector 20 near outer peripheral part, to form outside gathering light; And the second emergent light concentrates on the part near optical axis 13, to form the higher center optically focused of light intensity.By inner surface 11 and outer surface 12 structural allocation of collector lens 10, and with reflector 20 with the use of, the bright dipping of LED light source 30 is separated into two bundle bright dippings, and each bright dipping is assembled, to reach the luminous intensity distribution of gathering.Meanwhile, due to the effect of birefringence, when making the light outgoing gone out from anchor ring 111 transmission, be more partial to reflector 20, thus inciding reflection place of reflector 20 more near the bottom of reflector 20.Typically, when this emergent light incides on reflector 20, because the incidence angle with reflector 20 being is comparatively large, then pip is also located opposite from the outside position of reflector 20, and when this pip is behind bottom, the size of reflector 20 just can reduce many.
In one embodiment, after outer surface 12 reflects, the deviation angle of refracted ray is 10-40 °, then the angle projecting light on reflector 20 and optical axis 13 is 50-80 °, correspondingly, the angle (i.e. incidence angle) in this light and reflector 20 surface normal direction reduces.Because this incidence angle reduces, the closer outer surface 12 of pip, the size of reflector 20 just can reduce.
For the setting of outer surface 12, its be configured as with optical axis 13 semicircle that is symmetry axis or class semicircle, to strengthen the refraction effect of birefringence.When this birefringence effect is larger, incide the pip of reflector 20 also just the closer to the bottom of reflector 20, the size of reflector 20 is just programmable less.
In above-described embodiment, outer surface 12 also can be that any free form surface symmetrical rotary is formed, birefringence is carried out to bright dipping, but the shape of curved surface should ensure the light that reflects from reflector 20 and be the first emergent light A and the second emergent light B that are parallel to optical axis 13 from the light of outer surface 12 outgoing.
When needing narrower to the width requirement of center emergent light, namely after twice refraction closer to optical axis 13, then end face 112 can be configured to the convex surface to described LED light source 30 projection.Utilize the transmission plane of rat to strengthen being incident to the refraction effect of the light of the LED light source 30 of end face 112, thus the emergent light at center is more near optical axis 13, center emergent light is narrower, can be applicable to and needs in the occasion of accent light.
On above-described embodiment further or alternatively, the core of outer surface 12 or its top, namely the part of outgoing second emergent light B is the convex lens face 121 of a protrusion direction away from LED light source 30.The transmission plane of same utilization projection, strengthens the refraction effect of the second emergent light B when through outer surface 12, makes it more near optical axis 13.
When the combination of above-described embodiment or sole disposition, the central area of collector lens 10 is biconvex or plano-convex structure, adopts the top of different embodiments as end face 112 and outer surface 12 to select one or select two for bulge-structure as required to central area.
Preferred embodiment, convex lens face 121 make in process, through cloudy surface frosted process, the effect avoiding convex lens collector lens 10 to produce convex lens presenting, the second emergent light B is made to be scattered light, this scattered light fills the part between the first emergent light A and the second emergent light B, thus the first emergent light A is penetrated in conjunction with formation one entire light with the second emergent light B, and eliminates the possibility producing dazzle.
Due to the photochromic uniform requirement of emergent light, anchor ring 111 can be set to the face of cylinder, from the light uniform of anchor ring 111 outgoing, not have the situation that light distribution is uneven.
In another embodiment, the width of LED light source 30 and collector lens 10 enclose the ratio of the width of the cavity of formation between 50% ~ 70% towards the inner surface 11 of LED light source 30, LED light source 30 is made to be covered by the cavity of collector lens 10, can not be close to and cause the dissipate heat of LED light source 30 on collector lens 10, decrease taking up room of collector lens 10 simultaneously, improve light-out effect.
For the embodiment of the present invention, the width of center arrow beam of light and periphery angle pencil of ray is adjustable.Be specially: because the boundary being incident to end face 112 and anchor ring 111 is the joint face place of the center of LED light source 30 and the boundary line of end face 112 and anchor ring 111, therefore, expand or reduce the area of end face 112, can expand or reduce optical axis 13 and the above-mentioned angle connected between interface, this angle Yue great center transmitted light is wider, and vice versa.In one preferred embodiment, this angle, namely the light of end face 112 transmission and the angle of optical axis 13 are between 0-20 °, end face 112 is incident to from the center low-angle light that LED light source 30 sends, and the light of anchor ring 111 transmission and the angle of optical axis 13 are between 20-70 °, the wide-angle light sent from LED light source 30 is incident to reflector 20, and by reflector alignment, the final arrow beam of light luminous intensity distribution producing even photochromic distribution.
Another regulative mode can be the height regulating anchor ring 111.End face 112 and anchor ring 111 are connected to a point of interface, the cross section of the collector lens that simultaneously end face 112 and anchor ring 111 can be formed can regard a basic rectangular shape as, when the width of anchor ring 111 is fixed, when namely the end of this rectangle, is constant, when the distance (i.e. the height of end face 112 or the height of above-mentioned rectangle) of this point of interface and LED light source 30 increases or reduces, the angle between the diagonal (namely separating the line of demarcation injecting end face 112 and anchor ring 111) of this rectangle and end face 112 also increases thereupon or reduces.When the diagonal of this rectangle and the angle of end face 112 increase, the angle of the light that end face 112 reflects and optical axis 13 increases, and the angle of the light that anchor ring 111 reflects and optical axis 13 reduces; When the diagonal of this rectangle and the angle of end face 112 reduce, the angle of the light that end face 112 reflects and optical axis 13 reduces, and the angle of the optical fiber that anchor ring 111 reflects and optical axis 13 increases.Therefore, be variable using 20 ° of configurations as the boundary angle of separation first emergent light A and the second emergent light B in above-described embodiment, can according to actual conditions unrestricted choice between 0-90 °.
Owing to being generally equipped with multiple LED light source 30 in existing LED spotlight, for each LED light source 30, be equipped with the collector lens 10 in an above-described embodiment, then multiple collector lens 10 forms a collector lens group.This collector lens group can be one-body molded, and coupling is arranged on corresponding LED light source 30.
Should be noted that, embodiments of the invention have preferably implementation, and not any type of restriction is done to the present invention, any person skilled in art of being familiar with may utilize the technology contents of above-mentioned announcement change or be modified to equivalent effective embodiment, in every case the content of technical solution of the present invention is not departed from, the any amendment done above embodiment according to technical spirit of the present invention or equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (11)
1. a LED spotlight, comprise: LED light source, collector lens and the reflector be located at outside described collector lens, described collector lens comprises the inner surface near described LED light source, the outer surface away from described LED light source and is positioned at the optical axis at described collector lens center, it is characterized in that
Described inner surface comprises the end face that anchor ring and center around described optical axis are passed by described optical axis;
The light being incident to described anchor ring reflects to described reflector direction, and the light being incident to described end face reflects to described optical axis;
To described reflector, and gone out to be parallel to the first emergent light of described optical axis by described reflective cup reflects from the outgoing after described outer surface refraction of the light of described anchor ring transmission;
From the outgoing after described outer surface refraction of the light of described end face transmission, formed one near and be parallel to the second emergent light of described optical axis.
2. LED spotlight as claimed in claim 1, is characterized in that,
Described outer surface in the semicircle that is symmetry axis with described optical axis or class semicircle.
3. LED spotlight as claimed in claim 1 or 2, is characterized in that,
Described end face is the convex surface to described LED light source projection.
4. LED spotlight as claimed in claim 3, is characterized in that,
On described outer surface, the part of the second emergent light described in outgoing is the convex lens face of a protrusion direction away from described LED light source.
5. LED spotlight as claimed in claim 4, is characterized in that,
Described convex lens face is made through cloudy surface frosted.
6. LED spotlight as claimed in claim 1, is characterized in that,
The width of described LED light source and described collector lens enclose the ratio of the cavity width of formation between 50% ~ 75% towards the inner surface of described LED light source.
7. LED spotlight as claimed in claim 1, is characterized in that,
The angle of the light reflected from described end face and described optical axis is 0-20 °;
The angle of the light reflected from described anchor ring and described optical axis is 20-70 °.
8. LED spotlight as claimed in claim 1, is characterized in that,
Described anchor ring is the face of cylinder.
9. LED spotlight as claimed in claim 1, is characterized in that,
Described end face and described anchor ring are connected to a point of interface;
When the distance of described point of interface and described LED light source increases, the angle of the light that described end face reflects and described optical axis increases, and the angle of the light that described anchor ring reflects and described optical axis reduces;
When the distance of described point of interface and described LED light source reduces, the angle of the light that described end face reflects and described optical axis reduces, and the angle of the light that described anchor ring reflects and described optical axis increases.
10. LED spotlight as claimed in claim 9, is characterized in that,
The angle of the light and described optical axis that are projected to described reflector after described outer surface refraction is 50-80 °.
11. LED spotlights as claimed in claim 1, is characterized in that,
Described LED light source is multiple, is equipped with collector lens described in outside LED light source described in each;
Multiple described collector lens forms a collector lens group.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410474943.8A CN105485557A (en) | 2014-09-17 | 2014-09-17 | LED spot lamp |
| PCT/CN2015/087579 WO2016041430A1 (en) | 2014-09-17 | 2015-08-20 | Led spot lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410474943.8A CN105485557A (en) | 2014-09-17 | 2014-09-17 | LED spot lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105485557A true CN105485557A (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410474943.8A Pending CN105485557A (en) | 2014-09-17 | 2014-09-17 | LED spot lamp |
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| Country | Link |
|---|---|
| CN (1) | CN105485557A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641752A (en) * | 2016-11-25 | 2017-05-10 | 宁波公牛光电科技有限公司 | Light distribution module and lamp |
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