CN102759065B - Light emitting diode (LED) flood lens, LED flood lamp and lighting equipment - Google Patents
Light emitting diode (LED) flood lens, LED flood lamp and lighting equipment Download PDFInfo
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- CN102759065B CN102759065B CN201110105114.9A CN201110105114A CN102759065B CN 102759065 B CN102759065 B CN 102759065B CN 201110105114 A CN201110105114 A CN 201110105114A CN 102759065 B CN102759065 B CN 102759065B
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Abstract
The invention is applicable to the field of lighting, and provides a light emitting diode (LED) flood lens, an LED flood lamp and lighting equipment. A hemispherical groove is formed at the bottom of the flood lens to hold an LED, and an emergence surface is a plane; an external side surface is formed by rotating a broken line 360 degrees around a central shaft; the central shaft is superposed with the central axis of the groove; the broken line comprises at least three segments, and the opening angle between each segment and the central point at the bottom of the flood lens is the same, specifically 9 to 11 degrees; the included angle between each segment and the central shaft is 6 to 37 degrees; and the ratio of the outer diameter of the emergence surface to the depth of the lens is 2.2 to 2.6, and the emergence angle of the flood lens is 79.5 to 80.5 degrees. According to the LED flood lens, the groove is formed at the bottom of the flood lens, the external side surface of the lens is designed to be a rotating curved surface taking a plurality of broken lines as the rotating generatrix, and the opening angle between each segment and the central point at the bottom of the lens and the included angle between each segment and the central shaft of the lens are limited, so that the utilization rate of light is improved while the flood lens obtains uniform illumination.
Description
Technical field
The invention belongs to lighting field, relate in particular to a kind of LED flood lens, LED floodlight and lighting apparatus.
Background technology
At present, the floodlight mode of LED generally be take reflector luminous intensity distribution as main, but the floodlight that reflector is allotted there will be the higher phenomenon of mid portion light intensity conventionally, to the processing of light type, is not very desirable, especially larger near near light intensity LED optical axis.Prior art also can adopt concavees lens to carry out floodlight to LED, but this mode is lower to the utilization rate of LED luminous flux, shows that the light that light emitting anger is larger cannot be utilized, and finally causes the light utilization of light fixture too low.Also has at present a class flood lens, on the basis of LED optically focused total reflection lens (as shown in Figure 1), at its exit facet 101, make netted small salient point or the shrinkage pool structure of gathering and realize floodlight effect, the mode that also has employing to carry out frosted processing to exit facet realizes floodlight.The floodlight effect that above-mentioned these processing modes reach is all not ideal enough, shows that illuminance intermediate luminance even not, lighting space is too high and light utilization is too low.And existing lensed side surface rotary bus is generally straight line or parabola, the size of lens that therefore causes meeting light distribution requirements is generally slightly large.
Summary of the invention
The object of the present invention is to provide a kind of LED flood lens, make it improving the uniformity of illuminance and improving light utilization.
The present invention is achieved in that a kind of LED flood lens, and the bottom of described flood lens is provided with the hemispherical groove of holding LED light source, and the exiting surface of described flood lens is plane;
The lateral surface of described flood lens is formed around a central shaft rotating 360 degrees by a broken line;
Described central shaft overlaps with the axis of described groove;
Described broken line comprises at least three line segments, and each line segment equates with respect to the subtended angle of described flood lens bottom centre's point and is 9～11 °;
The angle of every line segment and described central shaft is 6～37 °;
The ratio of the external diameter of described exiting surface and the lens degree of depth is 2.4 ± 0.2, the bottom surface that the described lens degree of depth is flood lens and the distance between exiting surface;
The angle of emergence of described flood lens is 80 ± 0.5 °.
Another object of the present invention is to provide a kind of LED floodlight, comprise several LED illuminators, described LED illuminator comprises LED light source and floodlight assembly, and described floodlight assembly adopts above-mentioned LED flood lens;
The optical axis of described LED light source overlaps with the central shaft of described LED flood lens.
Another object of the present invention is to provide a kind of lighting apparatus, comprise illuminating part, described illuminating part adopts above-mentioned LED floodlight.
The invention has the beneficial effects as follows:
The present invention, in the coaxial hemispherical groove of holding LED light source that is provided with in the bottom of flood lens, is tentatively spread the light that LED light source sends, and appropriateness has weakened the too high phenomenon of emergent light central light strength;
The present invention is designed to take the surface of revolution of multistage broken line as rotation bus by the lateral surface of flood lens, and each line segment has been carried out to suitable setting with respect to the angle of subtended angle size, each line segment and the flood lens central shaft of flood lens bottom centre's point, make these lens further realize the Uniform Illumination in floodlight angle on realizing the symmetrical basis of penetrating of light, and there is higher light utilization.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of existing flood lens;
Fig. 2 is the perspective view of the LED flood lens that provides of first embodiment of the invention;
Fig. 3 is the cross-sectional view of the LED flood lens that provides of first embodiment of the invention;
Fig. 4 is the side-looking structural representation of the LED flood lens that provides of first embodiment of the invention;
Fig. 5 is the index path of the LED flood lens that provides of first embodiment of the invention;
Fig. 6 is the side-looking structural representation of the LED flood lens that provides of second embodiment of the invention;
Fig. 7 is the distribution curve flux schematic diagram of the LED flood lens that provides of second embodiment of the invention.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of LED flood lens, and its bottom is provided with the hemispherical groove of holding LED light source, and the exiting surface of flood lens is plane;
The lateral surface of flood lens is formed around a central shaft rotating 360 degrees by a broken line;
This central shaft overlaps with the axis of groove;
This broken line comprises at least three line segments, and each line segment equates with respect to the subtended angle of flood lens bottom centre's point and is 9～11 °;
The angle of every line segment and central shaft is 6～37 °;
The ratio of the external diameter of described exiting surface and the lens degree of depth is 2.4 ± 0.2, the bottom surface that the described lens degree of depth is flood lens and the distance between exiting surface;
The angle of emergence of described flood lens is 80 ± 0.5 °.
The present invention also provides a kind of LED floodlight, comprises several LED illuminators, and LED illuminator comprises LED light source and floodlight assembly, and this floodlight assembly adopts above-mentioned LED flood lens;
The optical axis of this LED light source overlaps with the central shaft of LED flood lens.
The present invention also provides a kind of lighting apparatus, comprises illuminating part, and this illuminating part adopts above-mentioned LED floodlight.
Below in conjunction with specific embodiment, the specific implementation of a kind of LED flood lens of the present invention is described in detail:
embodiment mono-:
Fig. 2 shows the perspective view of the LED flood lens that first embodiment of the invention provides, Fig. 3 shows the cross-sectional view of the LED flood lens that first embodiment of the invention provides, Fig. 4 shows the side-looking structural representation of the LED flood lens that first embodiment of the invention provides, Fig. 5 shows the index path of the LED flood lens that first embodiment of the invention provides, for convenience of explanation, only show the part relevant to the present embodiment.
Please refer to accompanying drawing 2,3, this LED flood lens 1 is mainly used in covering on LED light source 2 outsides to form a undersized LED illuminator.Concrete, this LED flood lens 1 is rotation body structure, has circular bottom surface 11 and exiting surface 12.This exiting surface 12 is plane, and vertical with the central shaft of flood lens 1.The bottom of this flood lens 1 is provided with a hemispherical groove 111 that is used for holding LED light source 2, and the central shaft of this groove 111 overlaps with the central shaft of flood lens 1.Existence due to groove 111, the emergent light of LED light source 2 passes through groove 111 and injects the appropriate diffusion phenomena of meeting generation in the process of flood lens, make light intensity can too not concentrate on the center of LED outgoing beam, and then avoid the too high phenomenon of traditional flood lens outgoing beam central light strength, improve to a certain extent flood lens and gone out uniformity of light.
The lateral surface 13 of this flood lens 1 is surface of revolution, and its rotating shaft is the central shaft of flood lens 1, and its rotation bus is broken line, and this broken line comprises at least three line segments.Concrete, every line segment equates with respect to the subtended angle (being two angle α that end points becomes with the line of lens bottom centre's point of Fig. 4 middle conductor) of lens bottom centre's point and between 9～11 °.And, from the bottom surface of lens to the direction of exiting surface, angle between every line segment and the central shaft of flood lens reduces gradually, therefore the angle of article one line segment from lens bottom and central shaft is maximum, this maximum angle is no more than 37 °, the line segment joining with exiting surface and the angle of central shaft are minimum, and this minimum angles is not less than 6 °.And ratio a/h=2.4 ± 0.2 of the external diameter a of the exiting surface of this flood lens and lens degree of depth h, as Fig. 4.By the quantity of line segment and the angle between each line segment and the central shaft of flood lens being rationally set, can obtaining the angle of emergence, be the uniform light of 80 ± 0.5 °.
By reference to the accompanying drawings 5 explanation these LED flood lens operation principle, first the light that LED light source 2 sends inject flood lens 1 inside, on groove 111 bottom flood lens and the interface between lens entity, there is refraction for the first time, make light that appropriateness diffusion occur, make to approach and be unlikely to have big difference away from the light intensity of LED beam center, having improved to a certain extent the uniformity of light intensity.
Inject in the light of flood lens 1, part light 51 is directly extraneous through exiting surface 12 directives of flood lens 1, at exiting surface 12 places, there is refraction for the second time, and this part refracted ray is the direction outgoing of flood lens central shaft dorsad, expanded the light angle of emergence of central ray, improved flood lens and gone out uniformity of light.The side of another part light directive flood lens 1, the special construction of this flood lens can make most of light generation total reflection of directive side, total reflection light penetrates through exiting surface and refraction for the second time occurs, and the direction of this part light trend flood lens central shaft penetrates.Continuation is with reference to accompanying drawing 5, for convenience of description, introduce plane of symmetry S herein, this plane of symmetry S is through the central shaft of flood lens 1 and perpendicular to the plane of flood lens exiting surface 12, be appreciated that this plane of symmetry S has numerous, and any one plane of symmetry S longitudinally divides this flood lens equally, half of lens is positioned at a side (A side) of plane of symmetry S, and second half is positioned at the opposite side (B side) of plane of symmetry S.The mode outgoing of the light of process total reflection to intersect, the B side of the light 52 final directive planes of symmetry that penetrate from plane of symmetry A side, the A side of the light 53 final directive planes of symmetry that penetrate from plane of symmetry B side.Because this flood lens 1 is symmetrical rotation body structure, LED light source 2 is positioned at again the groove coaxial with flood lens 111, therefore its emergent ray also distributes about central shaft symmetry or the near symmetrical of flood lens 1, has avoided the luminous flux of central shaft both sides and the problem of light distribution inequality.
The embodiment of the present invention, in the coaxial hemispherical groove of holding LED light source that is provided with in the bottom of flood lens, is tentatively spread the light that LED light source sends, and appropriateness has weakened the too high phenomenon of emergent light central light strength;
The embodiment of the present invention is designed to take the surface of revolution of multistage broken line as rotation bus by the lateral surface of flood lens, and each line segment has been carried out to suitable setting with respect to the angle of subtended angle size, each line segment and the flood lens central shaft of flood lens bottom centre's point, make these lens further realize the Uniform Illumination in floodlight angle on realizing the symmetrical basis of penetrating of light, and there is higher light utilization.
In embodiments of the present invention, optical glass or the optical plastic of the preferred high transmission rate of material of flood lens 1, the refractive index of material is greater than 1.45.The embodiment of the present invention can adopt PC material as lens material, and its refractive index is 1.59.
In embodiments of the present invention, can also further the bottom external diameter of flood lens be limited to 6～10mm, this size limits and coordinates above-mentioned architectural feature can make this flood lens realize miniaturization on the basis that obtains uniform illumination and high light line utilization rate.So further the base diameter of groove 111 is set to 4～6mm, is relatively applicable to holding the LED light source that diameter is less than 5mm.The external diameter that LED light source in the embodiment of the present invention inserts groove part is preferably less than 3mm.
The flood lens that the embodiment of the present invention provides is especially suitable as the flood lens of half LED light source of light intensity angle between 110～130 °, now can make the side structure of flood lens be fully used and have higher light utilization.
embodiment bis-:
Fig. 6 shows the side-looking structural representation of the LED flood lens that second embodiment of the invention provides, and Fig. 7 is the distribution curve flux schematic diagram of the LED flood lens that provides of second embodiment of the invention, for convenience of explanation, only shows the part relevant to the present embodiment.
The embodiment of the present invention provides a kind of preferred structure of LED flood lens on the basis of above-described embodiment.Specifically by reference to the accompanying drawings 4, each line segment of the present embodiment broken line is set to 10 ± 0.5 ° with respect to the subtended angle of flood lens bottom centre's point, more preferably 10 °.
Further, this multistage broken line comprises four line segments, i.e. the first selections, the second line segment, the 3rd line segment and the 4th line segment, and wherein, the angle of the central shaft of the first line segment and flood lens is 36～37 °; The angle of the second line segment and central shaft is 26～27 °; The angle of the 3rd line segment and central shaft is 16～17 °; The angle of the 4th line segment and central shaft is 6～7 °.The difference of the angle of any two adjacent segments and central shaft in the scope of 9～11 °, more preferably 10 ± 0.5 °.The LED flood lens with said structure has the light utilization of better floodlight effect and Geng Gao.
Fig. 6 shows the implementation of a kind of optimum of the embodiment of the present invention, the multistage broken line of the rotation bus of the side of this flood lens for being formed by four line segments, and the extended line 601 of the first line segment is 36.5 ° with the angle of the central shaft of flood lens; The extended line 602 of the second line segment is 26.5 ° with the angle of central shaft; The extended line 603 of the 3rd line segment is 16.5 ° with the angle of central shaft; The extended line 604 of the 4th line segment is 6.5 ° with the angle of central shaft.Each line segment of broken line is 10 ° with respect to the subtended angle of flood lens bottom centre's point, and the ratio of the external diameter of exiting surface and the lens degree of depth is 2.4.And, the about 8mm of bottom external diameter of this flood lens 1; The diameter 5mm of groove 111.Above-mentioned various angle and size limit, and make this flood lens have the lens degree of depth of about 5mm and the exiting surface of diameter 12mm, and the volume of lens integral body is very little.
Figure 7 shows that the distribution curve flux schematic diagram of above-mentioned LED flood lens, as seen from the figure, this flood lens can be realized illuminating effect very uniformly in the angle of 80 degree left and right.
embodiment tri-:
The flood lens that the embodiment of the present invention provides above-described embodiment is further improved, and specifically can increase anti-film in 13 platings of the side of flood lens 1, avoids light 13 ejaculations through side, further to improve the utilization rate of light.
The present invention, in the coaxial hemispherical groove of holding LED light source that is provided with in the bottom of flood lens, is tentatively spread the light that LED light source sends, and appropriateness has weakened the too high phenomenon of emergent light central light strength; Flood lens lateral surface is designed to take the surface of revolution of multistage broken line as rotation bus, and each line segment has been carried out to suitable setting with respect to the angle of subtended angle size, each line segment and the flood lens central shaft of flood lens bottom centre's point, make these lens further realize the Uniform Illumination in floodlight angle on realizing the symmetrical basis of penetrating of light, and there is higher light utilization.The bottom external diameter of flood lens is limited to 6～10mm, and this size limits and coordinates above-mentioned architectural feature to make this flood lens realize miniaturization on the basis that obtains uniform illumination and high light line utilization rate.
The outside that LED flood lens provided by the invention is mainly used in covering on LED light source is to obtain the LED illuminator of small size, this LED illuminator is mainly as the light source of LED floodlight, this LED floodlight can directly be used as lighting, also can be used as luminous component and is loaded in large and small type lighting apparatus.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a LED flood lens, the bottom of described flood lens is provided with the hemispherical groove of holding LED light source, and the exiting surface of described flood lens is plane, and the lateral surface of described flood lens is formed around a central shaft rotating 360 degrees by a broken line, it is characterized in that,
Described central shaft overlaps with the axis of described groove;
Described broken line comprises at least three line segments, and each line segment equates with respect to the subtended angle of described flood lens bottom centre's point and is 10 ± 0.5 °;
The angle of every line segment and described central shaft is 6～37 °;
The ratio of the external diameter of described exiting surface and the lens degree of depth is 2.4 ± 0.2, the bottom surface that the described lens degree of depth is flood lens and the distance between exiting surface;
The angle of emergence of described flood lens is 80 ± 0.5 °;
The material of described flood lens is PC material, and the refractive index of described PC material is 1.59;
The base diameter of described groove is 4～6mm.
2. LED flood lens as claimed in claim 1, is characterized in that, the bottom external diameter of described flood lens is 6～10mm.
3. LED flood lens as claimed in claim 1 or 2, is characterized in that, described broken line comprises four line segments, is followed successively by the first line segment, the second line segment, the 3rd line segment and the 4th line segment from the bottom of described flood lens;
The angle of described the first line segment and described central shaft is 36～37 °;
The angle of described the second line segment and described central shaft is 26～27 °;
The angle of described the 3rd line segment and described central shaft is 16～17 °;
The angle of described the 4th line segment and described central shaft is 6～7 °.
4. LED flood lens as claimed in claim 3, is characterized in that, the difference of the angle of any two adjacent segments and described central shaft is 9～11 °.
5. LED flood lens as claimed in claim 4, is characterized in that, the difference of the angle of any two adjacent segments and described central shaft is 10 ± 0.5 °.
6. a LED floodlight, comprises several LED illuminators, and described LED illuminator comprises LED light source and floodlight assembly, it is characterized in that, described floodlight assembly adopts the LED flood lens described in claim 1 to 5 any one;
The optical axis of described LED light source overlaps with the central shaft of described LED flood lens.
7. LED floodlight as claimed in claim 6, is characterized in that, the centre of luminescence of described LED light source overlaps with the centre of sphere of the groove of described LED flood lens.
8. LED floodlight as claimed in claim 6, is characterized in that, half light intensity angle of described LED light source is 110～130 °.
9. a lighting apparatus, comprises illuminating part, it is characterized in that, described illuminating part adopts the LED floodlight described in claim 6 to 8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110105114.9A CN102759065B (en) | 2011-04-26 | 2011-04-26 | Light emitting diode (LED) flood lens, LED flood lamp and lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110105114.9A CN102759065B (en) | 2011-04-26 | 2011-04-26 | Light emitting diode (LED) flood lens, LED flood lamp and lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102759065A CN102759065A (en) | 2012-10-31 |
| CN102759065B true CN102759065B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110105114.9A Active CN102759065B (en) | 2011-04-26 | 2011-04-26 | Light emitting diode (LED) flood lens, LED flood lamp and lighting equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180293A (en) * | 2013-05-22 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | LED (light emitting diode) floodlight lens and lamp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4557569A (en) * | 1983-11-17 | 1985-12-10 | The United States Of America As Represented By The Secretary Of The Army | Distended point source reflector having conical sections |
| CN1864026A (en) * | 2003-12-10 | 2006-11-15 | 冈谷电机产业株式会社 | Indicator lamp |
| CN101832510A (en) * | 2010-05-19 | 2010-09-15 | 海洋王照明科技股份有限公司 | Flood light reflector, flood light and motor boat |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6547416B2 (en) * | 2000-12-21 | 2003-04-15 | Koninklijke Philips Electronics N.V. | Faceted multi-chip package to provide a beam of uniform white light from multiple monochrome LEDs |
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2011
- 2011-04-26 CN CN201110105114.9A patent/CN102759065B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4557569A (en) * | 1983-11-17 | 1985-12-10 | The United States Of America As Represented By The Secretary Of The Army | Distended point source reflector having conical sections |
| CN1864026A (en) * | 2003-12-10 | 2006-11-15 | 冈谷电机产业株式会社 | Indicator lamp |
| CN101832510A (en) * | 2010-05-19 | 2010-09-15 | 海洋王照明科技股份有限公司 | Flood light reflector, flood light and motor boat |
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| CN102759065A (en) | 2012-10-31 |
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