CN104406127A - Light distribution reflector for LED (light-emitting diode) light source and LED lamp - Google Patents
Light distribution reflector for LED (light-emitting diode) light source and LED lamp Download PDFInfo
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- CN104406127A CN104406127A CN201410650504.8A CN201410650504A CN104406127A CN 104406127 A CN104406127 A CN 104406127A CN 201410650504 A CN201410650504 A CN 201410650504A CN 104406127 A CN104406127 A CN 104406127A
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- break
- symmetry axis
- light
- light source
- intensity distribution
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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
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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
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
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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
- F21Y2101/00—Point-like light sources
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to a light distribution reflector for an LED (light-emitting diode) light source. The light distribution reflector comprises a reflecting surface for reflecting light of the LED light source; the reflecting surface is formed by rotating a broken line by 360 degrees around a symmetry axis; one end of the light distribution reflector along the axial direction of the symmetry axis is open and serves as a light outlet through which the light of the LED light source is emitted after the light is reflected by the reflecting surface; an end wall at the other end of the light distribution reflector along the axial direction of the symmetry axis is provided with a light inlet through hole for the entrance of the light of the LED light source; one end, close to the light inlet through hole, of the broken line is a starting point, and the other end of the broken line is a terminal point; the broken line comprises at least one break point between the starting point and the terminal point; radial distances between the starting point and the symmetry axis, between each break point and the symmetry axis and between the terminal point and the symmetry axis are gradually increased sequentially in the direction from the starting point to the terminal point. Light energy is distributed again by the light distribution reflector, a uniform lighting effect is achieved on an irradiation surface, the light receiving effect and a shielding angle are better, glare is avoided in a range of gamma60 degrees-gamma90 degrees, light pollution is reduced, the light energy is saved, and a good lighting environment is provided.
Description
Technical field
The present invention relates to the technical field of semiconductor lighting, especially relate to a kind of luminous intensity distribution reflector and LED lamp of LED light source.
Background technology
The luminous intensity of LED light source is mainly with lambert's type or nearly lambert's type distribution, in most cases, for meeting different lighting demands, need different light intensity distributions, desirable lighting environment can be reached, in the case, need to be designed by secondary light-distribution, the luminous intensity of LED light source is redistributed.The main devices of secondary light-distribution design has lens and reflector, lens or reflector are placed on LED light source position, the curved surface of scioptics or the curved surface of reflector change the light transmition direction of LED light source, and the shadow surface of light obtains ideal light distribution.Lens are utilized to do secondary light-distribution design, due to the refractive index of lens material self and the stray light of LED rim ray, cannot obtain and significantly receive light effect, after the light of reflector of the prior art to LED light source reflects, often distribution of light is uneven, the Design of Luminaires having the illumination place cutting light requirement cannot be met, lamp shielding angle poor effect, in use easily produces dazzle, causes visual fatigue.
Summary of the invention
The object of this invention is to provide a kind of luminous intensity distribution reflector and LED lamp of LED light source, solve the problem of the uneven and easy generation dazzle of distribution of light in prior art after reflector reflects.
The technical scheme that technical solution problem of the present invention adopts is: a kind of luminous intensity distribution reflector of LED light source, and described luminous intensity distribution reflector has the reflecting surface of the light for reflex LED light source, and described reflecting surface turns round 360 ° by broken line around symmetry axis and formed; Described luminous intensity distribution reflector is opening-like and light-emitting window that is that penetrate after described reflective surface as the light of LED light source along one end of symmetry axis axis, and described luminous intensity distribution reflector is along the end wall of the other end of symmetry axis axis offering the light inlet through hole injected for the light of LED light source; Described broken line is starting point near one end of light inlet through hole, the other end of described broken line is terminal, described broken line comprises at least one break between described Origin And Destination, along described starting point to the end direction described in starting point, each break and terminal increase gradually successively to the radial distance between described symmetry axis.
In the luminous intensity distribution reflector of LED light source of the present invention, it is 97 °-107 ° that the light that LED light source sends forms half-peak corner through described reflective surface, and beam angle is 107 °-117 °.
In the luminous intensity distribution reflector of LED light source of the present invention, the quantity of described break is one and is set to the first break.
In the luminous intensity distribution reflector of LED light source of the present invention, described starting point is 11.95mm-12.15mm to the radial distance of described symmetry axis; Described first break is 14.6mm-14.8mm to the radial distance of described symmetry axis; Described terminal is 15.7mm-15.9mm to the radial distance of described symmetry axis; Being 4.7mm-5.3mm along the axial distance of symmetry axis between described starting point and described first break, is 7.9mm-8.5mm along the axial distance of symmetry axis between described first break and described terminal.
In the luminous intensity distribution reflector of LED light source of the present invention, described broken line also comprises two breaks between described starting point and the first break and is set to the second break and the 3rd break respectively, described second break and the 3rd break set gradually along the direction of described starting point to the first break.
In the luminous intensity distribution reflector of LED light source of the present invention, described second break is 12.75mm-12.95mm to the radial distance of described symmetry axis, and described 3rd break is 13.9mm-14.1mm to the radial distance of described symmetry axis; Be 1.0mm-1.2mm along the axial distance of symmetry axis between described second break and described starting point, axial distance along symmetry axis between described 3rd break and described second break is 2.1mm-2.3mm, and the axial distance along symmetry axis between described first break and described 3rd break is 1.6mm-1.8mm.
In the luminous intensity distribution reflector of LED light source of the present invention, the line segment among the starting point of described broken line, each break and terminal between adjacent 2 is straightway.
In the luminous intensity distribution reflector of LED light source of the present invention, described reflecting surface is formed by reflectance coating of aluminizing.
In the luminous intensity distribution reflector of LED light source of the present invention, symmetric shape centered by the cross section of described light inlet through hole, and the center of described light inlet through hole is dropped on described symmetry axis.
The present invention also provides a kind of LED lamp, and comprise aluminium base and be arranged on the LED light source on described aluminium base, described aluminium base is also provided with above-mentioned luminous intensity distribution reflector, described LED light source is arranged on the light inlet through hole of described luminous intensity distribution reflector.
Implement luminous intensity distribution reflector and the LED lamp of LED light source of the present invention, there is following beneficial effect: the light that LED light source sends, through the luminous intensity distribution reflector designed by the present invention, redistributes light energy, shadow surface obtains a uniform illumination light effect; It is splendid that light effect received by luminous intensity distribution reflector designed by the present invention, being distributed in uniform light within the scope of γ 0 ° of-γ 60 °, can meet the Design of Luminaires having the illumination place cutting light requirement; Luminous intensity distribution reflector lamp shielding angle of the present invention is better, free from glare within the scope of γ 60 ° of-γ 90 °, reduces light pollution, saves light energy, provides good light environment, enhances the practicality of product and functional.
Accompanying drawing explanation
Fig. 1 is the structural representation of the luminous intensity distribution reflector of LED light source of the present invention;
Fig. 2 is the cross-sectional schematic of the luminous intensity distribution reflector of LED light source of the present invention;
Fig. 3 is the polar coordinates surface of intensity distribution of LED light source;
Fig. 4 is the polar coordinates surface of intensity distribution that LED light source light after luminous intensity distribution reflector reflects is redistributed;
Fig. 5 is the rectangular co-ordinate surface of intensity distribution that LED light source light after luminous intensity distribution reflector reflects is redistributed;
Fig. 6 is LED light source hot spot figure 1 meter of formation after luminous intensity distribution reflector;
Fig. 7 is LED light source light effect figure 1 meter of formation after luminous intensity distribution reflector;
Fig. 8 is the light distribution key diagram of LED light source after luminous intensity distribution reflector within the scope of γ 0 °, γ 50 ° and γ 90 °.
Detailed description of the invention
Below in conjunction with drawings and Examples, the luminous intensity distribution reflector of LED light source of the present invention and the concrete structure of LED lamp and action principle are described further:
A kind of LED lamp, comprise aluminium base and be arranged on the LED light source on aluminium base, wherein the quantity of LED light source can be one, also can be multiple, each LED light source is equipped with a luminous intensity distribution reflector, for reflecting the light of LED light source and then making the distribution of light after reflection even, free from glare, reduces light pollution.LED light source can select lambert's type or nearly lambert's type.
As shown in Figure 1-2, a kind of luminous intensity distribution reflector of LED light source, the one end open of this luminous intensity distribution reflector and roughly in bowl-shape, comprise madial wall and lateral wall, wherein the surface of madial wall is the reflecting surface 1 for the light of reflex LED light source, reflecting surface 1 turns round 360 ° by broken line 2 around symmetry axis a and is formed, preferably luminous intensity distribution reflector entirety of the present invention is the revolution be rotarily formed around symmetry axis, the symmetry axis of luminous intensity distribution reflector and the symmetry axis a of reflecting surface 1 coincide, this reflecting surface 1 is preferably formed by reflectance coating of aluminizing, and also can be silvered reflective film.
The lateral wall of luminous intensity distribution reflector is provided with two to protruding 3 near the position male of opening, two pairs of projections 3 are symmetric, two projections 3 in every a pair projection 3 set gradually along the axial direction of symmetry axis a, forming draw-in groove 4 between two projections 3 in every a pair projection 3, being fixed on aluminium base for coordinating with aluminium base.
Luminous intensity distribution reflector is opening-like and light-emitting window 5 that is that penetrate after reflective surface as the light of LED light source along one end of symmetry axis a axis, and luminous intensity distribution reflector is along the end wall of the other end of symmetry axis a axis offering the light inlet through hole 6 injected for the light of LED light source.Symmetric shape centered by the cross section of light inlet through hole 6, the shape of light inlet through hole 6 can be circular, square, regular polygon etc., preferably the shape of light inlet through hole 6 is circular, be beneficial to light have no unnecessary block pass from light inlet through hole 6, its internal diameter is 4mm-6mm, be preferably 5mm, also can be 4mm or 6mm, the center of light inlet through hole 6 is preferably dropped on symmetry axis a, and LED light source is arranged in light inlet through hole 6, and the center of LED light source overlaps with symmetry axis a.
As shown in Figure 2, turning round 360 ° around symmetry axis a, to form the broken line 2 of reflectings surface near one end of light inlet through hole 6 be starting point 21, the other end of broken line 2 is terminal 22, its middle polyline 2 comprises at least one break between starting point 21 and terminal 22, along starting point 21, the direction starting point 21 of 22, the radial distance between each break and terminal 22 to symmetry axis a increase successively gradually to terminal, wherein the quantity of break can be one, two or three, be preferably three, such receipts light effect is good, is conducive to light and can evenly penetrates after reflection.Line segment among the starting point 21 of broken line 2, each break and terminal 22 between adjacent 2 is straightway, and being conducive to light can non-uniform reflection, and is beneficial to production and processing.
The quantity of broken line 2 break between starting point 21 and terminal 22 is one and is set to the first break 23, is described below by the specific design of different embodiments to luminous intensity distribution reflector.
Embodiment 1:
The radial distance R1 of starting point 21 to symmetry axis a is 12.05mm, and the radial distance R3 of the first break 23 to symmetry axis a is 14.7mm, and the radial distance R2 of terminal 22 to symmetry axis a is 15.8mm; Axial distance (not indicating in figure) along symmetry axis a between starting point 21 and the first break 23 is 5mm, is 8.2mm along the axial distance H1 of symmetry axis a between the first break 23 and terminal 22.It is 100 ° that the light that LED light source sends reflects to form half-peak corner through reflecting surface 1, and beam angle is 109 °.
Embodiment 2:
The radial distance R1 of starting point 21 to symmetry axis a is 11.95mm, and the radial distance R3 of the first break 23 to symmetry axis a is 14.6mm, and the radial distance R2 of terminal 22 to symmetry axis a is 15.7mm; Axial distance (not indicating in figure) along symmetry axis a between starting point 21 and the first break 23 is 5.3mm, is 8.5mm along the axial distance H1 of symmetry axis a between the first break 23 and terminal 22.It is 107 ° that the light that LED light source sends forms half-peak corner through reflective surface, and beam angle is 117 °.
Embodiment 3:
The radial distance R1 of starting point 21 to symmetry axis a is 12.15mm, and the radial distance R3 of the first break 23 to symmetry axis a is 14.8mm, and the radial distance R2 of terminal 22 to symmetry axis a is 15.9mm; Axial distance (not indicating in figure) along symmetry axis a between starting point 21 and the first break 23 is 4.7mm, is 7.9mm along the axial distance H1 of symmetry axis a between the first break 23 and terminal 22.It is 97 ° that the light that LED light source sends forms half-peak corner through reflective surface, and beam angle is 107 °.
The quantity of broken line 2 break between starting point 21 and terminal 22 is three, except the first break 23, between starting point 21 and the first break 23, also comprise two breaks and be set to the second break 24 and the 3rd break 25 respectively, second break 24 and the 3rd break 25 set gradually along the direction of starting point 21 to the first break 23, are described below by the specific design of different embodiments to luminous intensity distribution reflector.
Embodiment 4:
The radial distance R1 of starting point 21 to symmetry axis a is 12.05mm, the radial distance R3 of the first break 23 to symmetry axis a is 14.7mm, the radial distance R2 of terminal 22 to symmetry axis a is 15.8mm, the radial distance R4 of the second break 24 to symmetry axis a is 12.85mm, and the radial distance R5 of the 3rd break 25 to symmetry axis a is 14mm; Be 8.2mm along the axial distance H1 of symmetry axis a between first break 23 and terminal 22, be 1.1mm along the axial distance H2 of symmetry axis between second break 24 and starting point 21, axial distance H3 along symmetry axis a between 3rd break 25 and the second break 24 is 2.2mm, is 1.7mm along the axial distance H4 of symmetry axis between the first break 23 and the 3rd break 25.It is 102 ° that the light that LED light source sends forms half-peak corner through reflective surface, and beam angle is 112 °.
Embodiment 5:
The radial distance R1 of starting point 21 to symmetry axis a is 11.95mm, the radial distance R3 of the first break 23 to symmetry axis a is 14.6mm, the radial distance R22 of terminal 22 to symmetry axis a is 15.7mm, the radial distance R4 of the second break 24 to symmetry axis a is 12.75mm, and the radial distance R5 of the 3rd break 25 to symmetry axis a is 13.9mm; Be 8.5mm along the axial distance H1 of symmetry axis a between first break 23 and terminal 22, be 1.2mm along the axial distance H2 of symmetry axis a between second break 24 and starting point 21, axial distance H3 along symmetry axis a between 3rd break 25 and the second break 24 is 2.3mm, is 1.8mm along the axial distance H4 of symmetry axis a between the first break 23 and the 3rd break 25.It is 99 ° that the light that LED light source sends forms half-peak corner through reflective surface, and beam angle is 110 °.
Embodiment 6:
The radial distance R1 of starting point 21 to symmetry axis a is 12.15mm, the radial distance R3 of the first break 23 to symmetry axis a is 14.8mm, the radial distance R2 of terminal 22 to symmetry axis a is 15.9mm, the radial distance R4 of the second break 24 to symmetry axis a is 12.95mm, and the radial distance R5 of the 3rd break 25 to symmetry axis a is 14.1mm; Be 7.9mm along the axial distance H1 of symmetry axis a between first break 23 and terminal 22, be 1.0mm along the axial distance H2 of symmetry axis a between second break 24 and starting point 21, axial distance H3 along symmetry axis a between 3rd break 25 and the second break 24 is 2.1mm, is 1.6mm along the axial distance H4 of symmetry axis a between the first break 23 and the 3rd break 25.It is 105 ° that the light that LED light source sends forms half-peak corner through reflective surface, and beam angle is 116 °.
It should be noted that, the luminous intensity distribution reflector zoomed in or out in the basic equal percentage size of luminous intensity distribution reflector size of the present invention is all within protection scope of the present invention.
As shown in Figure 3, show polar surface of intensity distribution of nearly lambert's type LED light source, as can be seen from the figure only use LED light source time light intensity mainly concentrate on zone line; As illustrated in figures 4-5, the surface of intensity distribution after luminous intensity distribution reflector reflects, as can be seen from the figure when the zone line light intensity of LED light source after luminous intensity distribution reflector reflects of the present invention dies down, and periphery light intensity strengthens.As everyone knows, when remote use light source irradiation, can further aggravation zone line irradiation luminous intensity and weaken the irradiation luminous intensity of neighboring area, therefore after using luminous intensity distribution reflector of the present invention to reflect light, because zone line light intensity is more weak, periphery light intensity is stronger, make can make during telecurie irradiation to reach balanced between the light intensity of zone line and the light intensity of neighboring area, even if light intensity from which angle presents all more equably.As shown in fig. 6-7, light after reflection telecurie irradiation time, prove that light that LED light source of the present invention sends is through the luminous intensity distribution reflector designed by the present invention, redistributes light energy, shadow surface obtains a uniform illumination light effect; As shown in Figure 8, it is splendid that light effect received by the luminous intensity distribution reflector designed by the present invention, being distributed in uniform light within the scope of γ 0 ° of-γ 60 °, can meet the Design of Luminaires having the illumination place cutting light requirement; Luminous intensity distribution reflector lamp shielding angle of the present invention is better, free from glare within the scope of γ 60 ° of-γ 90 °, reduces light pollution, saves light energy, provides good light environment, enhances the practicality of product and functional.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, all these improve or conversion all should belong within the protection domain of claims of the present invention.
Claims (10)
1. the luminous intensity distribution reflector of a LED light source, described luminous intensity distribution reflector has the reflecting surface (1) of the light for reflex LED light source, it is characterized in that, described reflecting surface (1) turns round 360 ° by broken line (2) around symmetry axis (a) and is formed; Described luminous intensity distribution reflector and the light-emitting window (5) of light through described reflecting surface (1) reflection after injection as LED light source opening-like along one end that symmetry axis (a) is axial, described luminous intensity distribution reflector is along the end wall of the other end of symmetry axis (a) axis offering the light inlet through hole (6) injected for the light of LED light source; Described broken line (2) is starting point (21) near one end of light inlet through hole (6), the other end of described broken line (2) is terminal (22), described broken line (2) comprises at least one break between described starting point (21) and terminal (22), along described starting point (21) (22) to terminal direction described in radial distance between starting point (21), each break and terminal (22) to described symmetry axis (a) increase gradually successively.
2. the luminous intensity distribution reflector of LED light source according to claim 1, is characterized in that, it is 97 °-107 ° that the light that LED light source sends reflects to form half-peak corner through described reflecting surface (1), and beam angle is 107 °-117 °.
3. the luminous intensity distribution reflector of LED light source according to claim 1, is characterized in that, the quantity of described break is one and is set to the first break (23).
4. the luminous intensity distribution reflector of LED light source according to claim 3, it is characterized in that, described starting point (21) is 11.95mm-12.15mm to the radial distance (R1) of described symmetry axis (a), described first break (23) is 14.6mm-14.8mm to the radial distance (R3) of described symmetry axis (a), and described terminal (22) is 15.7mm-15.9mm to the radial distance (R2) of described symmetry axis (a); Axial distance along symmetry axis (a) between described starting point (21) and described first break (23) is 4.7mm-5.3mm, and the axial distance (H1) along symmetry axis (a) between described first break (23) and described terminal (22) is 7.9mm-8.5mm.
5. the luminous intensity distribution reflector of LED light source according to claim 3, it is characterized in that, described broken line (2) also comprises two breaks between described starting point (21) and the first break (23) and is set to the second break (24) and the 3rd break (25) respectively, described second break (24) and the 3rd direction of break (25) along described starting point (21) to the first break (23) set gradually.
6. the luminous intensity distribution reflector of LED light source according to claim 5, it is characterized in that, described second break (24) is 12.75mm-12.95mm to the radial distance (R4) of described symmetry axis (a), and described 3rd break (25) is 13.9mm-14.1mm to the radial distance (R5) of described symmetry axis (a);
Axial distance (H2) along symmetry axis (a) between described second break (24) and described starting point (21) is 1.0mm-1.2mm, axial distance (H3) along symmetry axis (a) between described 3rd break (25) and described second break (24) is 2.1mm-2.3mm, and the axial distance (H4) along symmetry axis (a) between described first break (23) and described 3rd break (25) is 1.6mm-1.8mm.
7. the luminous intensity distribution reflector of LED light source according to claim 1, is characterized in that, the line segment among the starting point (21) of described broken line (2), each break and terminal (22) between adjacent 2 is straightway.
8. the luminous intensity distribution reflector of LED light source according to claim 1, is characterized in that, described reflecting surface (1) is formed by reflectance coating of aluminizing.
9. the luminous intensity distribution reflector of LED light source according to claim 1, it is characterized in that, symmetric shape centered by the cross section of described light inlet through hole (6), and the center of described light inlet through hole (6) is dropped on described symmetry axis (a).
10. a LED lamp, comprise aluminium base and be arranged on the LED light source on described aluminium base, it is characterized in that, described aluminium base is also provided with the arbitrary described luminous intensity distribution reflector of claim 1-9, described LED light source is arranged on light inlet through hole (6) place of described luminous intensity distribution reflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410650504.8A CN104406127A (en) | 2014-11-14 | 2014-11-14 | Light distribution reflector for LED (light-emitting diode) light source and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410650504.8A CN104406127A (en) | 2014-11-14 | 2014-11-14 | Light distribution reflector for LED (light-emitting diode) light source and LED lamp |
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| CN104406127A true CN104406127A (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410650504.8A Pending CN104406127A (en) | 2014-11-14 | 2014-11-14 | Light distribution reflector for LED (light-emitting diode) light source and LED lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN101929645A (en) * | 2009-06-24 | 2010-12-29 | 海洋王照明科技股份有限公司 | Floodlight ceiling lamp |
| CN101963329A (en) * | 2010-09-30 | 2011-02-02 | 海洋王照明科技股份有限公司 | Reflecting cup and lamp comprising same |
| CN201944780U (en) * | 2011-01-13 | 2011-08-24 | 欧普照明有限公司 | Reflector of light-emitting diode (LED) dinner ceiling lamp |
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- 2014-11-14 CN CN201410650504.8A patent/CN104406127A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929645A (en) * | 2009-06-24 | 2010-12-29 | 海洋王照明科技股份有限公司 | Floodlight ceiling 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 |
| CN101963329A (en) * | 2010-09-30 | 2011-02-02 | 海洋王照明科技股份有限公司 | Reflecting cup and lamp comprising same |
| CN201944780U (en) * | 2011-01-13 | 2011-08-24 | 欧普照明有限公司 | Reflector of light-emitting diode (LED) dinner ceiling lamp |
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Application publication date: 20150311 |