CN105465627B - Beam control device and light emitting device - Google Patents
Beam control device and light emitting device Download PDFInfo
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- CN105465627B CN105465627B CN201511024659.1A CN201511024659A CN105465627B CN 105465627 B CN105465627 B CN 105465627B CN 201511024659 A CN201511024659 A CN 201511024659A CN 105465627 B CN105465627 B CN 105465627B
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- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
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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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
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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
Abstract
The invention provides a light beam control device and a light emitting device, wherein the light beam control device comprises a main body which is provided with an opening at one end and is in a shell shape, the main body is provided with light incidence surfaces which are symmetrically arranged around the center axis and are positioned at the inner side of the main body and light emergence surfaces which are positioned at the outer side of the main body, the light incidence surfaces comprise three incidence surfaces, and the three incidence surfaces jointly control the light pattern of incident light with an included angle of 0-90 degrees with the center axis. By adopting the light beam control device, the light type control of incident light is realized more accurately, and the light distribution with the light beam angle of 120-150 degrees is obtained by matching the surface type of the light emergent surface.
Description
Technical Field
The present invention relates to the field of optical systems, and more particularly, to a beam control device and a light emitting device.
Background
Light emitting diode (Light Emitting Diode, abbreviated as LED) light sources have been widely focused and applied due to their small size, high brightness, low power consumption, long service life, and the like, and LED light source technologies have been rapidly developed.
In the prior art, a lens is arranged in an LED light source module, and the LED device is subjected to light distribution by designing the structure of the lens, namely, designing the shapes of an incident surface and an emergent surface, so as to obtain emergent light meeting the requirements, thereby effectively utilizing light energy. However, at present, the lens cannot accurately control the light emitted by the LED device, so that the light emitted by the LED device cannot be effectively distributed after passing through the lens, and the light utilization effect of the light emitted by the LED device is further not ideal.
Disclosure of Invention
The present invention has been made in view of the above-mentioned problems, and has as its object to provide a beam control device and a light emitting device which overcome or at least partially solve the above-mentioned problems.
According to an aspect of the present invention, there is provided a beam control apparatus comprising: one end is provided with an opening, and the main body is in a shell shape, and is provided with a light incident surface which is symmetrically arranged around the central axis and is positioned at the inner side of the main body and a light emergent surface which is positioned at the outer side of the main body.
Optionally, the three incident surfaces include:
a first incident surface for controlling the light pattern of the incident light having an included angle of 0 DEG to 40 DEG with the central axis;
a second incident surface for controlling the light pattern of the incident light having an included angle of 40 DEG to 55 DEG with the central axis;
and the third incident surface is used for controlling the light type of incident light with an included angle of 55-90 degrees with the central axis.
Optionally, the first incident surface is a curved surface far away from the open end of the main body, and has a smooth curved surface obtained by rotating a concave curve around the central axis;
the second incident surface is connected with the first incident surface and is provided with a conical smooth curved surface;
the third incident surface is connected with the second incident surface and is provided with a cylindrical smooth curved surface.
Optionally, the light exit surface comprises a first exit surface having a conical smooth curved surface and a second exit surface located below the first exit surface and having a slope smaller than the first exit surface at a side outside the main body.
Optionally, the light emitting surface includes a first emitting surface and a second emitting surface on a side surface outside the main body, the first and second emitting surfaces are tapered surfaces formed by splicing a plurality of planes, and the second emitting surface is located below the first emitting surface and has a slope smaller than that of the first emitting surface.
According to another aspect of the present invention, there is provided a light emitting device comprising at least one light emitting element provided on a substrate, a reflecting means provided for emitting light emitted from the light emitting element toward a light incident surface of the light beam controlling means, and the above-described light beam controlling means.
Optionally, the reflecting means is a reflecting cavity having a reflecting bottom surface and a conical reflecting side surface, and has a central axis coinciding with the beam steering means.
Optionally, the light emitting elements are uniformly disposed on the emission bottom surface.
Optionally, the reflecting device is used for performing primary light distribution on the light rays emitted by the light emitting element; the light beam control device is further used for carrying out secondary light distribution on the light rays emitted by the light emitting element and the light rays subjected to light distribution by the reflecting device, and light distribution with the light beam angle of 120-150 degrees is obtained.
Optionally, the light intensity of the emergent light emitted by the light emitting element after being subjected to light distribution by the reflecting device and the light beam control device and the included angle of the emergent light with the central axis is 80 degrees and is not less than 30% of the maximum light intensity;
the central light intensity of the emergent light is not more than 120% of the maximum light intensity and not less than 50% of the maximum light intensity;
the light intensity of the emergent light in the horizontal direction is not less than 5% of the maximum light intensity.
Optionally, the beam control device is configured to deflect the outgoing light emitted by the light emitting element to generate a light distribution curve, where the light distribution curve at an angle of 40 ° -55 ° with respect to a vertical axis of the light distribution curve is in a burr shape.
According to the light beam control device and the light emitting device provided by the embodiment of the invention, the light incidence surface of the light beam control device is divided into three incidence surfaces, and the three incidence surfaces can respectively process the incident light beams. In addition, three different incident surfaces can carry out different angles of treatment (such as refraction of light beams) on the incident light beams, each incident surface can generate a fixed included angle with the central shaft, and then the input light beams are treated by utilizing the included angle, so that deflection aiming at different included angles can be obtained, deflection angles of different partial light beams can be accurately controlled, and the incident light beams can be more accurately controlled.
Further, the light emitted by the light emitting element passes through the light incident surface of the light beam control device and then matches with the surface of the light emergent surface, the beam angle of the obtained emergent light is 120-150 degrees, the light intensity at the position where the included angle between the emergent light and the central axis of the light beam control device is 80 degrees is not less than 30% of the maximum light intensity, the central light intensity of the emergent light is not more than 120% of the maximum light intensity, not less than 50% of the maximum light intensity, and the light intensity in the horizontal direction of the emergent light is not less than 5% of the maximum light intensity.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 shows a longitudinal cross-sectional view of a beam steering device according to one embodiment of the invention;
fig. 2 shows a schematic structure of a beam steering apparatus according to an embodiment of the present invention;
FIG. 3 shows another schematic structure of a beam steering apparatus according to an embodiment of the present invention;
fig. 4 shows a longitudinal cross-sectional view of a light emitting device according to an embodiment of the present invention;
FIG. 5 shows a schematic structural diagram of a reflective device coupled to a substrate according to one embodiment of the present invention; and
fig. 6 illustrates a light distribution curve of a light emitting device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Example 1
Fig. 1 shows a longitudinal cross-sectional view of a beam steering device according to one embodiment of the invention. Fig. 2 shows a schematic structure of a beam steering apparatus according to an embodiment of the present invention. Referring to fig. 1 and 2, a beam control device a according to an embodiment of the present invention includes a body A1 having an opening at one end and a housing shape. The main body A1 has a light incident surface 1 located inside the main body and a light exit surface 2 located outside the main body, and the light incident surface 1 and the light exit surface 2 are each symmetrically disposed around a central axis of the main body. The light incidence surface 1 comprises three incidence surfaces, and the incidence light type of the incidence light beam control device A, which is incident to the main body A1 and has an included angle of 0-90 degrees, is commonly controlled by the three incidence surfaces.
Wherein the light incidence surface 1 comprises a first incidence surface 11, a second incidence surface 12 and a third incidence surface 13. The light pattern of the incident light incident into the beam control device a is commonly controlled by the first incident surface 11, the second incident surface 12, and the third incident surface 13. Wherein the first incident surface 11 controls the light pattern of the incident light having an angle ranging from 0 ° to 40 ° with respect to the main body central axis, the second incident surface 12 controls the light pattern of the incident light having an angle ranging from 40 ° to 55 ° with respect to the main body central axis, and the third incident surface 13 controls the light pattern of the incident light having an angle ranging from 55 ° to 90 ° with respect to the main body central axis.
Referring to fig. 1, the first incident surface 11 is located at the inner side away from the open end of the main body, i.e., at the top of the inner side of the main body, and has a smooth curved surface obtained by rotating a concave curve around the central axis of the main body; the second incident surface 12 is a smooth curved surface with a cone shape positioned below the first incident surface 11 and connected by superposition of an upper end curve of the second incident surface 12 and a lower end curve of the first incident surface 11, wherein an included angle between the tapered smooth curved surface of the second incident surface 12 and a central axis of the main body A1 is more than 0 degrees and less than 90 degrees; the third incident surface 13 is a smooth curved surface having a cylindrical shape located below the second incident surface, and is connected by coincidence of an upper end curve of the third incident surface 13 and a lower end curve of the second incident surface 12.
Referring to fig. 1 and 2, the light exit surface 2 is a tapered smooth curved surface located outside the main body, and includes two exit surfaces. Wherein the upper half part of the first emergent surface 21 is a circular plane positioned at the top of the outer side of the main body, and the lower half part of the first emergent surface 21 is a conical curved surface positioned at the outer side of the main body; the second exit surface 22 is a tapered curved surface located below the first exit surface 21, the second exit surface 22 is connected to the lower half of the first exit surface 21, and the slope of the second exit surface 22 is smaller than the slope of the lower half surface of the first exit surface 21.
According to the light beam control device and the light emitting device provided by the embodiment of the invention, the light incidence surface of the light beam control device is divided into three incidence surfaces, and the three incidence surfaces can respectively process the incident light beams. In addition, three different incident surfaces can carry out different angles of treatment (such as refraction of light beams) on the incident light beams, each incident surface can generate a fixed included angle with the central shaft, and then the input light beams are treated by utilizing the included angle, so that deflection aiming at different included angles can be obtained, deflection angles of different partial light beams can be accurately controlled, and the incident light beams can be more accurately controlled.
Example two
Fig. 3 shows another structural schematic diagram of a beam steering apparatus according to an embodiment of the present invention. The beam control device A of the embodiment of the invention comprises a main body A1 with an opening at one end and a shell shape. The main body A1 has a light incident surface 1 located inside the main body and a light exit surface 3 located outside the main body, and the light incident surface 1 and the light exit surface 3 are each symmetrically disposed around a central axis of the main body.
The light incident surface 1 in the embodiment of the present invention is the same as the light incident surface 1 provided in the first embodiment, and will not be described in detail herein.
Referring to fig. 3, the light exit surface 3 is located at the outside of the main body and includes two exit surfaces. Wherein the first exit surface 31 is a conical surface formed by splicing a plurality of planes; the second exit surface 32 is located below the first exit surface 31, is also a tapered surface formed by a plurality of planes, and the slope of the plane joining the second exit surface 32 is smaller than the slope of the plane joining the first exit surface 31.
In a preferred embodiment of the present invention, the light exit surface of the present embodiment may be formed by splicing the equilateral trapezoidal planes, since the tapered surface is ensured after the splicing of the equilateral trapezoidal planes, and the incident light can be deflected in multiple directions.
Because the light emergent surface provided by the embodiment of the invention is formed by splicing a plurality of planes, compared with the smooth light emergent surface provided by the first embodiment, the light emergent surface provided by the embodiment of the invention has a plurality of planes in different directions, so that the incident light can be deflected in more directions, and the bright effect of the obtained emergent light is more obvious.
The present invention also provides a light emitting device including at least one light emitting element provided on a substrate, a reflecting device provided to emit light emitted from the light emitting element toward a light incident surface of the light beam controlling device, and the light beam controlling device described above, based on the same inventive concept.
According to the light-emitting device provided by the embodiment of the invention, the obtained emergent light at least meets the following characteristics:
the beam angle of the emergent light is 120-150 degrees;
the included angle between the emergent light and the central axis of the light beam control device is 80 degrees, and the light intensity at the position of the emergent light and the central axis of the light beam control device is not less than 30% of the maximum light intensity;
the central light intensity of the emergent light is not more than 120% of the maximum light intensity and not less than 50% of the maximum light intensity;
the light intensity of the emergent light in the horizontal direction is not less than 5% of the maximum light intensity.
Example III
Fig. 4 shows a longitudinal cross-sectional view of a light emitting device according to an embodiment of the present invention. Referring to fig. 4, the light emitting device B includes a beam control device 41, a reflecting device 42, a substrate 43, and a light emitting element 44. The beam control device 41 has the same main body as that of the first embodiment, and will not be described in detail herein. One end of the reflection device 42 is connected to the beam control device 41, and the other end is connected to the substrate 43; at least one light emitting element 44 is provided on the substrate 43. Wherein the reflecting means 42 is used for performing a light distribution once before a part of the light emitted from the light emitting element 44 is directed to the light incident surface of the beam control means 41.
Fig. 5 shows a schematic structural diagram of a reflection device connected to a substrate according to an embodiment of the present invention. Referring to fig. 5, the reflecting means 42 is a reflecting cavity having a central axis coincident with the beam steering means 41 and including two parts of a reflecting bottom surface and a reflecting side surface. The reflective bottom surface is connected to the substrate 43, and the reflective side surface is used for primary distribution of light emitted from the light emitting element 44. Wherein, the through hole for containing the light-emitting element is arranged on the reflecting bottom surface, and the light-emitting element is uniformly arranged on the reflecting bottom surface. Referring to fig. 5, 6 light emitting elements 44 are provided on the reflective bottom surface of the reflection device 42, and three through holes are opened on the reflective bottom surface, i.e., each through hole accommodates 2 light emitting elements 44.
Part of the light-emitting element 44 is subjected to primary light distribution through the reflecting device 42, then the light pattern of the incident light is controlled through three incident surfaces of the light beam control device 41, and finally the light distribution with the light beam angle of 120-150 degrees is obtained through the plane type matching of the light emergent surfaces of the light beam control device.
Fig. 6 illustrates a light distribution curve of a light emitting device according to an embodiment of the present invention. Referring to the light distribution curve shown in fig. 6, the beam angle of the outgoing light, the maximum light intensity value, the light intensity value at an angle of 80 ° with the central axis of the beam control device 41, and the light intensity value in the horizontal direction can be obtained.
The beam angle of the emergent light of the light-emitting device provided by the embodiment of the invention is 145 degrees. After calculating the light intensity value obtained in fig. 6, the light intensity at the position where the angle between the outgoing light and the central axis of the beam control device 41 is 80 ° is 40% of the maximum light intensity, the central light intensity of the outgoing light is 90% of the maximum light intensity, and the light intensity in the horizontal direction of the outgoing light is 10% of the maximum light intensity.
Referring to fig. 6, a portion of the light distribution curve having an included angle of 40 ° -55 ° with a vertical axis of the light distribution curve is burr-shaped, and accordingly, an outgoing light portion corresponding to the burr-shaped light distribution curve has a dazzling effect.
In summary, the beam control device and the light emitting device provided by the invention can achieve the following beneficial effects:
according to the light beam control device and the light emitting device provided by the embodiment of the invention, the light incidence surface of the light beam control device is divided into three incidence surfaces, and the three incidence surfaces can respectively process the incident light beams. In addition, three different incident surfaces can carry out different angles of treatment (such as refraction of light beams) on the incident light beams, each incident surface can generate a fixed included angle with the central shaft, and then the input light beams are treated by utilizing the included angle, so that deflection aiming at different included angles can be obtained, deflection angles of different partial light beams can be accurately controlled, and the incident light beams can be more accurately controlled.
Further, the light emitted by the light emitting element passes through the light incident surface of the light beam control device and then matches with the surface of the light emergent surface, the beam angle of the obtained emergent light is 120-150 degrees, the light intensity at the position where the included angle between the emergent light and the central axis of the light beam control device is 80 degrees is not less than 30% of the maximum light intensity, the central light intensity of the emergent light is not more than 120% of the maximum light intensity, not less than 50% of the maximum light intensity, and the light intensity in the horizontal direction of the emergent light is not less than 5% of the maximum light intensity.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (7)
1. The light beam control device comprises a main body which is provided with an opening at one end and takes the shape of a shell, and the main body is provided with a light incidence surface which is symmetrically arranged around the center axis and is positioned at the inner side of the main body and a light emergence surface which is positioned at the outer side of the main body, and the light beam control device is characterized in that the light incidence surface comprises three incidence surfaces which jointly control the light type of incident light with an included angle of 0-90 degrees with the center axis;
a side surface outside the main body, the light exit surface including a first exit surface having a tapered smooth curved surface and a second exit surface located below the first exit surface and having a slope smaller than the first exit surface; or (b)
The light emitting surface comprises a first emitting surface and a second emitting surface, the first emitting surface and the second emitting surface are conical surfaces formed by splicing a plurality of planes, and the second emitting surface is positioned below the first emitting surface and has a slope smaller than that of the first emitting surface;
the three incident surfaces include:
a first incident surface for controlling the light pattern of the incident light having an included angle of 0 DEG to 40 DEG with the central axis;
a second incident surface for controlling the light pattern of the incident light having an included angle of 40 DEG to 55 DEG with the central axis;
a third incident surface for controlling the light pattern of the incident light having an included angle of 55 DEG to 90 DEG with the central axis;
the first incident surface is a curved surface far away from the opening end of the main body and is provided with a smooth curved surface obtained by rotating a concave curve around the central axis;
the second incident surface is connected with the first incident surface and is provided with a conical smooth curved surface;
the third incident surface is connected with the second incident surface and is provided with a cylindrical smooth curved surface.
2. A light-emitting device comprising at least one light-emitting element provided on a substrate, reflecting means provided for emitting light emitted from the light-emitting element toward a light-incident surface of the beam control device, and the beam control device according to claim 1.
3. The light emitting device of claim 2, wherein the reflecting means is a reflecting cavity having a reflecting bottom surface and a tapered reflecting side surface, and has a central axis coincident with the beam steering means.
4. A light-emitting device according to claim 3, wherein the light-emitting elements are uniformly disposed on the reflective bottom surface.
5. A light-emitting device according to any one of claims 2 to 4,
the reflecting device is used for carrying out primary light distribution on the light rays emitted by the light-emitting element;
the light beam control device is further used for carrying out secondary light distribution on the light rays emitted by the light emitting element and the light rays subjected to light distribution by the reflecting device, and light distribution with the light beam angle of 120-150 degrees is obtained.
6. A light-emitting apparatus as recited in claim 5, wherein,
the light intensity of the outgoing light emitted by the light emitting element after being subjected to light distribution by the reflecting device and the light beam control device, at an included angle of 80 degrees with the central axis, is not less than 30% of the maximum light intensity;
the central light intensity of the emergent light is not more than 120% of the maximum light intensity and not less than 50% of the maximum light intensity;
the light intensity of the emergent light in the horizontal direction is not less than 5% of the maximum light intensity.
7. A light-emitting device according to claim 2, wherein,
the light beam control device is used for deflecting emergent light emitted by the light emitting element to generate a light distribution curve, wherein the light distribution curve at the position with an included angle of 40-55 degrees with the vertical axis of the light distribution curve is in a burr shape.
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| CN201511024659.1A CN105465627B (en) | 2015-12-30 | 2015-12-30 | Beam control device and light emitting device |
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| CN201511024659.1A CN105465627B (en) | 2015-12-30 | 2015-12-30 | Beam control device and light emitting device |
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| CN108775553B (en) * | 2018-06-19 | 2023-07-25 | 苏州欧普照明有限公司 | Lens and light source module |
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| KR20130097951A (en) * | 2012-02-27 | 2013-09-04 | 삼성전자주식회사 | Lens of lighting apparatus |
| TW201420956A (en) * | 2012-11-20 | 2014-06-01 | E Pin Optical Industry Co Ltd | LED light distributing lens and light source apparatus using the same |
| TW201420957A (en) * | 2012-11-20 | 2014-06-01 | E Pin Optical Industry Co Ltd | LED light control lens and light source apparatus using the same |
| TWM451497U (en) * | 2012-12-18 | 2013-04-21 | E Pin Optical Industry Co Ltd | Illumination led lamp with wide emission angle |
| CN203273700U (en) * | 2013-05-17 | 2013-11-06 | 上海广中电子电器配件有限公司 | Bat wing lens |
| CN203478099U (en) * | 2013-09-30 | 2014-03-12 | 成都欧盛光电科技有限公司 | LED illuminating lens |
| CN205350879U (en) * | 2015-12-30 | 2016-06-29 | 欧普照明股份有限公司 | Light beam controlling means and illuminator |
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| CN105465627A (en) | 2016-04-06 |
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