CN111043571A - LED lens and lamps and lanterns of secondary mixed light - Google Patents
LED lens and lamps and lanterns of secondary mixed light Download PDFInfo
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- CN111043571A CN111043571A CN202010017291.0A CN202010017291A CN111043571A CN 111043571 A CN111043571 A CN 111043571A CN 202010017291 A CN202010017291 A CN 202010017291A CN 111043571 A CN111043571 A CN 111043571A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses an LED lens for secondary light mixing, which comprises an incident area, an emergent area and a reflecting area, wherein the incident area is provided with a groove for placing a light source, the top wall of the groove forms a first incident surface, the side wall of the groove forms a second incident surface, and the emergent area comprises a first emergent surface and a second emergent surface surrounding the first emergent surface; the first part of light rays are emitted out after passing through the first incident surface and the first emergent surface, and the first incident surface and/or the first emergent surface comprise compound eye surfaces; the second part of light rays are emitted out after passing through the second incident surface, the reflection area and the second emergent surface, at least one of the second incident surface, the reflection area and the second emergent surface is a first target surface, at least one of the second incident surface, the reflection area and the second emergent surface is a second target surface, the first target surface and the second target surface are located in different areas, the first target surface comprises first protruding units arranged along the radial direction of the rotating body, and the second target surface comprises second protruding units arranged along the circumferential direction of the rotating body.
Description
Technical Field
The invention relates to a lens, in particular to an LED lens for secondary light mixing and a lamp.
Background
Light Emitting Diodes (LEDs) have the characteristics of power saving, lightness, long service life, and the like, and semiconductor lighting products using LEDs are currently common environmental protection and energy saving products. At present, the packaging structure of a semiconductor lighting product directly covers fluorescent powder on the surface of an LED chip, the fluorescent powder is excited to emit light by monochromatic light emitted by the LED chip, the light is mixed with the monochromatic light not absorbed by the fluorescent powder to generate white light, and then a lens is covered to improve the light emitting efficiency of the LED. However, due to the structural characteristics of the LED lighting product, there is a problem that the color temperature at the LED chip is inevitably high, and the color temperature at the phosphor is low, that is, the color temperature difference is significant due to the structural characteristics of the LED lighting product, particularly in the near light field.
Disclosure of Invention
The invention aims to: aiming at the problem that in the prior art, the color temperature difference is caused by the packaging characteristics of an LED lighting product, particularly the color temperature difference is obvious in a near light field, the LED lens and the lamp for secondary light mixing are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
a secondary light mixing LED lens comprises a rotating body, wherein an incident area and an emergent area are arranged on the rotating body, a reflection area is formed on the outer side wall surface between the emergent area and the incident area, a groove used for placing a light source is formed in the incident area, the top wall of the groove forms a first incident surface, the side wall of the groove forms a second incident surface, the emergent area comprises a first emergent surface and a second emergent surface, the second emergent surface surrounds the outside of the first emergent surface,
a first part of light emitted by the light source is emitted out after passing through the first incident surface and the first emergent surface, the first incident surface and/or the first emergent surface comprises a compound eye surface formed by combining a plurality of third protruding units, and the third protruding units have radians in the circumferential direction and the radial direction of the rotating body;
a second part of light emitted by the light source is emitted out through the second incident surface, the reflecting area and the second emergent surface, at least one of the second incident surface, the reflection area and the second emergent surface is a first target surface, at least one of the second incident surface, the reflection area and the second emergent surface is a second target surface, and the first target surface and the second target surface are located in different regions (i.e. the first target surface and the second target surface are not overlapped and are two independent surfaces), the first target surface comprises a plurality of first protruding units arranged along the radial direction of the rotating body, each first protruding unit has an arc in the circumferential direction of the rotating body, the second target surface includes a plurality of second projection units arranged in a circumferential direction of the rotating body, each of the second projection units having an arc in a radial direction of the rotating body.
The principle of the invention is as follows:
the first part of light emitted by the light source is emitted after passing through the first incident surface and the first emergent surface, and because the part of light is closer to the light source and is not reflected by the reflecting surface, the expansion of the part of light in the circumferential direction and the radial direction is larger, therefore, a compound eye surface formed by combining third protruding units is required to be arranged on the first incident surface and/or the first emergent surface, and the third protruding units have radians in the circumferential direction and the radial direction of the rotating body, and the circumferential direction and the radial direction are mixed by the third protruding units, so that the color temperature difference is reduced;
the second part of light that the light source sent jets out behind second incident surface, reflection area, the second exit surface, and this part of light still has great extension at the hoop with radially, need follow the first protruding unit that the rotator radially arranged, follow the second protruding unit that the rotator hoop arranged mixes the light to the hoop through first protruding unit, mixes the light to radially through the second protruding unit, through the secondary mixed light, reduces the colour temperature difference.
In summary, the invention uses different cylindrical surfaces or spherical surfaces on the surface of the LED lens, so that the light of the light source is respectively subjected to radial and circumferential double light mixing, thereby realizing secondary light mixing, reducing color temperature difference, and making the color of the light spot more uniform.
As a preferable aspect of the present invention, the compound eye surface is formed by arranging a plurality of the third protruding units in an array.
As a preferable aspect of the present invention, the third protrusion units are arranged in an annular array, or the third protrusion units are arranged in a honeycomb array.
As a preferable aspect of the present invention, the compound eye surface is formed by arranging a plurality of the third protrusion units along a spiral line. According to the arrangement method, the regularity of each third protruding unit is weak, so that corresponding light rays are not easy to image, and initial defects of the LED light source are not easy to present on light spots.
As a preferable aspect of the present invention, the spiral line is a fermamule line.
In a preferred embodiment of the present invention, the emission area has a distribution diameter in a direction perpendicular to the optical axis of the lens of 0 to D, and the first emission surface has a distribution diameter in a direction perpendicular to the optical axis of the lens of 0 to D1The distribution diameter of the second emergent surface along the direction vertical to the optical axis of the lens is D1To D, wherein 0.2 D.ltoreq.D1≤0.8D。
As a preferable scheme of the present invention, the first protrusion unit and the second protrusion unit are both cylindrical protrusions, and the third protrusion unit is a spherical protrusion or an aspheric protrusion.
As a preferable aspect of the present invention, all of the first projection units are arranged to cover the first target surface, and all of the second projection units are arranged to cover the second target surface.
In a preferred embodiment of the present invention, the lowest point of the first emission surface is lower than the lowest point of the second emission surface. So set up, can change the emergent mode that takes place interface reflection's wide-angle light for the facula is more even, is convenient for simultaneously produce more and moulds plastics.
In a preferred embodiment of the present invention, the first emission surface includes a first unit surface and a second unit surface, the first unit surface surrounds the first unit surface, and a lowest point of the first unit surface is lower than a highest point of the second unit surface. In a similar way, the emergent mode of the large-angle light rays reflected by the interface can be changed, so that the light spots are more uniform, and the production and injection molding are more convenient.
In a preferred embodiment of the present invention, the first emission surface includes a first unit surface and a second unit surface, the first unit surface surrounds the first unit surface, a lowest point of the first unit surface is lower than a highest point of the second unit surface, and a lowest point of the second unit surface is lower than a lowest point of the second emission surface. In a similar way, the emergent mode of the large-angle light rays reflected by the interface can be changed, so that the light spots are more uniform, and the production and injection molding are more convenient.
The invention also discloses a lamp which comprises any one of the LED lens for secondary light mixing.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the invention, different cylindrical surfaces or spherical surfaces are used on the surface of the LED lens, so that the light rays of the light source are respectively subjected to radial and circumferential double light mixing, secondary light mixing is realized, the color temperature difference can be reduced, and the color of light spots is more uniform.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of a secondary light mixing LED lens according to embodiment 1 of the present invention.
Fig. 2 is a top view of the secondary light mixing LED lens according to embodiment 1 of the present invention.
Fig. 3 is a bottom view of the secondary light mixing LED lens according to embodiment 1 of the present invention.
Fig. 4 is a front view of the secondary light-mixing LED lens according to embodiment 1 of the present invention.
Fig. 5 is a side view of the secondary light mixing LED lens according to embodiment 1 of the present invention.
Fig. 6 is a sectional view a-a in fig. 2.
Fig. 7 is a sectional view B-B in fig. 2.
Fig. 8 is a light path diagram (radial direction) of a first portion of light rays of the light source described in embodiment 1 of the present invention.
Fig. 9 is a diagram (circular) of the optical path of the first part of the light source according to embodiment 1 of the present invention.
Fig. 10 is a light path diagram (radial direction) of a second portion of light rays of the light source described in embodiment 1 of the present invention.
Fig. 11 is a diagram (circular) of the optical path of the second part of the light source according to embodiment 1 of the present invention.
FIG. 12 is a color temperature distribution comparison graph of an LED lens using the secondary mixing of the present invention and a conventional lens.
Fig. 13 is a first schematic three-dimensional structure diagram of a secondary light-mixing LED lens according to embodiment 2 of the present invention.
Fig. 14 is a schematic diagram of a three-dimensional structure of a secondary light-mixing LED lens according to embodiment 2 of the present invention.
Fig. 15 is a plan view of the secondary light-mixing LED lens according to embodiment 2 of the present invention.
Fig. 16 is a bottom view of the secondary light mixing LED lens according to embodiment 2 of the present invention.
Fig. 17 is a front view of the secondary light-mixing LED lens according to embodiment 2 of the present invention.
Fig. 18 is a first schematic three-dimensional structure diagram of a secondary light-mixing LED lens according to embodiment 3 of the present invention.
Fig. 19 is a schematic diagram of a three-dimensional structure of a secondary light-mixing LED lens according to embodiment 3 of the present invention.
Fig. 20 is a bottom view of the secondary light mixing LED lens according to embodiment 3 of the present invention.
Fig. 21 is a front view of the secondary light-mixing LED lens according to embodiment 3 of the present invention.
Fig. 22 is a first schematic three-dimensional structure diagram of a secondary light-mixing LED lens according to embodiment 4 of the present invention.
Fig. 23 is a schematic diagram of a three-dimensional structure of a secondary light-mixing LED lens according to embodiment 4 of the present invention.
Fig. 24 is a top view of the secondary light-mixing LED lens according to embodiment 4 of the present invention.
Fig. 25 is a front view of the secondary light-mixing LED lens according to embodiment 4 of the present invention.
Fig. 26 is a cross-sectional view of a secondary light-mixing LED lens according to embodiment 4 of the present invention.
Fig. 27 is a schematic three-dimensional structure diagram of an LED lens for secondary light mixing according to embodiment 5 of the present invention.
Fig. 28 is a top view of the secondary light-mixing LED lens according to embodiment 5 of the present invention.
Fig. 29 is a sectional view of an LED lens for secondary light mixing according to embodiment 5 of the present invention.
Icon: 1-incidence area, 11-first incidence surface, 12-second incidence surface, 2-reflection area, 3-emergence area, 31-first emergence surface, 311-unit surface I, 312-unit surface II, 32-second emergence surface, 4-groove, 5-third protrusion unit, 6-first protrusion unit and 7-second protrusion unit.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-7, a secondary light mixing LED lens includes a rotating body, where the rotating body is provided with an incident region 1 and an exit region 3, an outer wall surface between the exit region 3 and the incident region 1 forms a reflection region 2, and the incident region 1 is provided with a groove 4 for placing a light source.
The top wall of the recess 4 constitutes a first entrance face 11 and the side walls of the recess 4 constitute second entrance faces 12.
The exit area 3 includes a first exit surface 31 and a second exit surface 32, the second exit surface 32 surrounds the first exit surface 31, specifically, the distribution diameter of the exit area 3 along the direction perpendicular to the optical axis of the lens is 0 to D, and the distribution diameter of the first exit surface 31 along the direction perpendicular to the optical axis of the lens is 0 to D1The distribution diameter of the second emergent surface 32 along the direction vertical to the optical axis of the lens is D1-D, wherein 0.2 D.ltoreq.D1≤0.8D。
First emergent face 31 includes the compound eye face that is formed by the protruding unit 5 combination of a plurality of third, the protruding unit 5 of third is protruding or aspheric surface is protruding, the protruding unit 5 of third is in the rotator hoop all has the radian with radially, compound eye face is a plurality of the protruding unit 5 array of third is arranged and is formed, the protruding unit 5 of third is arranged for annular array, or the protruding unit 5 of third is arranged for honeycomb array, or the protruding unit 5 of third is arranged along the helix, the helix can be fermat's spiral, and all the protruding unit 5 of third is covered with first emergent face 31.
The second emergent surface 32 comprises a plurality of first protruding units 6 arranged along the radial direction of the rotating body, the first protruding units 6 are cylindrical protruding units, each first protruding unit 6 has an arc in the circumferential direction of the rotating body, and all the first protruding units 6 are fully distributed on the second emergent surface 32.
The reflection area 2 comprises a plurality of second protruding units 7 arranged along the circumferential direction of the rotating body, the second protruding units 7 are cylindrical protruding units, each second protruding unit 7 has a radian in the radial direction of the rotating body, and all the second protruding units 7 are fully distributed in the reflection area 2.
As shown in fig. 8-9, a first part of light emitted by the light source is emitted after passing through the first incident surface 11 and the first exit surface 31, in this embodiment, a compound eye surface formed by combining the third protruding units 5 is disposed on the first exit surface 31, and after the light enters the compound eye surface, the light is mixed in the circumferential direction and the radial direction of the rotating body by the third protruding units 5, so as to reduce the color temperature difference;
as shown in fig. 10-11, a second portion of light emitted from the light source is emitted through the second incident surface 12, the reflective region 2, and the second emitting surface 32, in this embodiment, a plurality of second protruding units 7 arranged along the circumferential direction of the rotating body are disposed in the reflective region 2, and each second protruding unit 7 has an arc in the radial direction of the rotating body, and the light is mixed in the radial direction of the rotating body by the second protruding units 7; in the present embodiment, a plurality of first protruding units 6 are further disposed on the second exit surface 32, and each first protruding unit 6 has an arc in the circumferential direction of the rotating body, and the color temperature difference is reduced by mixing light in the circumferential direction of the rotating body through the first protruding units 6 and by secondary mixing light.
FIG. 12 is a graph of color temperature distribution in a region of 500 × 500mm at a distance of 1m from the lens, and it can be seen that the color temperature distribution of the LED lens for secondary light mixing according to the present invention has smaller difference in height compared to the conventional lens. Therefore, the invention uses different cylindrical surfaces or spherical surfaces on the surface of the LED lens, so that the light rays of the light source are respectively subjected to radial and circumferential double light mixing, secondary light mixing is realized, the color temperature difference can be reduced, and the colors of light spots are more consistent and uniform.
Example 2
As shown in fig. 13 to 17, the present embodiment is different from embodiment 1 in that the second projection unit 7 is provided not in the reflection area 2 but in the second incident surface 12. Similarly, the second part of light emitted by the light source can be mixed.
Example 3
As shown in fig. 18 to 21, the present embodiment is different from embodiment 1 in that the second projection units 7 are disposed on both the reflection area 2 and the second incident surface 12, and the reflection area is not covered with the second projection units 7, and the second incident surface is not covered with the second projection units 7. Similarly, the second part of light emitted by the light source can be mixed.
Example 4
As shown in fig. 22-26, the present embodiment is different from embodiment 1 in that the first exit surface 31 includes a first unit surface 311 and a second unit surface 312, the second unit surface 312 surrounds the first unit surface 311, a lowest point of the first unit surface 311 is lower than a highest point of the second unit surface 312, and a lowest point of the second unit surface 312 is lower than a lowest point of the second exit surface 32. That is, the first exit surface 31 sinks as a whole and sinks in two layers. By the arrangement, the emergent mode of the large-angle light reflected by the interface can be changed, so that the light spots are more uniform.
As a modification, the first emission surfaces 31 may each sink only partially, that is, only the first unit surface 311 sinks, the second unit surface 312 does not sink (similar to embodiment 1), and the lowest point of the first unit surface 311 is lower than the highest point of the second unit surface 312, compared to embodiment 1.
As a variation, the first emission surface 31 is entirely sunk, but is not layered, that is, the unit surface one 311 and the unit surface two 312 are sunk at the same height, and the lowest point of the first emission surface 31 is lower than the lowest point of the second emission surface 32.
The first unit surface 311 and the second unit surface 312 are both filled with the third protruding units 5. In a similar way, the first part of light emitted by the light source can be mixed.
Example 5
As shown in fig. 27 to 29, the present embodiment is different from embodiment 4 in that the second exit surface 32 is not covered with the first projection unit 6. Similarly, the second part of light emitted by the light source can be mixed.
Example 6
A luminaire comprising a secondary light mixing LED lens as in any of embodiments 1-5.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (12)
1. A secondary light mixing LED lens comprises a rotating body, wherein an incident area and an emergent area are arranged on the rotating body, a reflection area is formed on the outer side wall surface between the emergent area and the incident area, a groove for placing a light source is arranged in the incident area, the secondary light mixing LED lens is characterized in that the top wall of the groove forms a first incident surface, the side wall of the groove forms a second incident surface, the emergent area comprises a first emergent surface and a second emergent surface, the second emergent surface surrounds the first emergent surface,
the first incident surface and/or the first exit surface comprises a compound eye surface formed by combining a plurality of third protruding units, and the third protruding units have radians in the circumferential direction and the radial direction of the rotating body;
at least one of the second incident surface, the reflection region and the second exit surface is a first target surface, at least one of the second incident surface, the reflection region and the second exit surface is a second target surface, the first target surface and the second target surface are located in different regions, the first target surface includes a plurality of first protrusion units arranged along the radial direction of the rotating body, each of the first protrusion units has an arc in the circumferential direction of the rotating body, the second target surface includes a plurality of second protrusion units arranged along the circumferential direction of the rotating body, and each of the second protrusion units has an arc in the radial direction of the rotating body.
2. The secondary light-mixing LED lens according to claim 1, wherein the fly-eye surface is formed by arranging a plurality of the third protruding units in an array.
3. The twice-mixed LED lens as recited in claim 2, wherein the third convex units are arranged in a circular array, or the third convex units are arranged in a honeycomb array.
4. The secondary light-mixing LED lens according to claim 1, wherein the fly-eye surface is formed by arranging a plurality of the third protruding units along a spiral line.
5. The twice-mixed LED lens of claim 4, wherein the spiral is a Fermat spiral.
6. The twice-mixed LED lens as claimed in claim 1, wherein the distribution diameter of the exit area along the direction perpendicular to the optical axis of the lens is 0 to D, and the distribution diameter of the first exit surface along the direction perpendicular to the optical axis of the lens is 0 to D1The distribution diameter of the second emergent surface along the direction vertical to the optical axis of the lens is D1To D, wherein 0.2 D.ltoreq.D1≤0.8D。
7. The secondary light mixing LED lens of any one of claims 1-6, wherein the first protrusion unit and the second protrusion unit are both cylindrical protrusions, and the third protrusion unit is a spherical protrusion or an aspheric protrusion.
8. The twice-mixed LED lens as recited in any of claims 1-6, wherein all of the first protruding elements are all over the first target surface, and all of the second protruding elements are all over the second target surface.
9. The twice-mixed LED lens as recited in any of claims 1-6 wherein the lowest point of the first exit surface is lower than the lowest point of the second exit surface.
10. The twice-mixed LED lens as recited in claim 9, wherein the first exit surface comprises a first unit surface and a second unit surface, the first unit surface surrounds the first unit surface, a lowest point of the first unit surface is lower than a highest point of the second unit surface, and a lowest point of the second unit surface is lower than a lowest point of the second exit surface.
11. The secondary light-mixing LED lens according to any one of claims 1-6, wherein the first exit surface comprises a first unit surface and a second unit surface, the first unit surface surrounds the first unit surface, and the lowest point of the first unit surface is lower than the highest point of the second unit surface.
12. A luminaire comprising a secondary light mixing LED lens as claimed in any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010017291.0A CN111043571A (en) | 2020-01-08 | 2020-01-08 | LED lens and lamps and lanterns of secondary mixed light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010017291.0A CN111043571A (en) | 2020-01-08 | 2020-01-08 | LED lens and lamps and lanterns of secondary mixed light |
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| Publication Number | Publication Date |
|---|---|
| CN111043571A true CN111043571A (en) | 2020-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010017291.0A Pending CN111043571A (en) | 2020-01-08 | 2020-01-08 | LED lens and lamps and lanterns of secondary mixed light |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664906A (en) * | 2020-12-30 | 2021-04-16 | 欧普照明股份有限公司 | Lens and lamp |
| WO2022143238A1 (en) * | 2020-12-30 | 2022-07-07 | 欧普照明股份有限公司 | Lens and lighting |
-
2020
- 2020-01-08 CN CN202010017291.0A patent/CN111043571A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664906A (en) * | 2020-12-30 | 2021-04-16 | 欧普照明股份有限公司 | Lens and lamp |
| WO2022143238A1 (en) * | 2020-12-30 | 2022-07-07 | 欧普照明股份有限公司 | Lens and lighting |
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