CN108302333A - A kind of phosphor structures and preparation method thereof and photochromic adjustable illumination device - Google Patents
A kind of phosphor structures and preparation method thereof and photochromic adjustable illumination device Download PDFInfo
- Publication number
- CN108302333A CN108302333A CN201810098747.3A CN201810098747A CN108302333A CN 108302333 A CN108302333 A CN 108302333A CN 201810098747 A CN201810098747 A CN 201810098747A CN 108302333 A CN108302333 A CN 108302333A
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- Prior art keywords
- phosphor structures
- phosphor
- structures
- photochromic
- illumination device
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical group [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 238000005286 illumination Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 3
- 230000000644 propagated effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
- F21K2/06—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence
- F21K2/08—Non-electric light sources using luminescence; Light sources using electrochemiluminescence using chemiluminescence activated by an electric field, i.e. electrochemiluminescence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
-
- 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
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/60—Light sources with three-dimensionally disposed light-generating elements on stacked substrates
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Electromagnetism (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
A kind of phosphor structures of proposition of the embodiment of the present invention and preparation method thereof and photochromic adjustable illumination device, are related to lighting technical field.The thickness of the different location of the phosphor structures is different, and the phosphor structures are for being reflected or being transmitted after the light sent out that different location receives a light source, to propagate out different photochromic of colour temperature.There is photochromic adjustable illumination device provided in an embodiment of the present invention user photochromic colour temperature can be adjusted so that the more preferable advantage of the experience sense of user.
Description
Technical field
The present invention relates to lighting technical fields, in particular to a kind of phosphor structures and preparation method thereof and light
Color adjustable illumination device.
Background technology
With the continuous development of photovoltaic industry, LED illumination still has some shortcomings in certain fields, and cannot be satisfied makes
The requirement of user.Laser diode (LD, Laser Diode) is born in the same period with light emitting diode (LED), although LD
Large-scale commercial there is no universal as LED, but its application range is more extensive, in measurement, electronics, communication, doctor
The industries such as, processing have the figure of LD.
Due under conditions of same illumination, being illuminated compared to LED light, 60% of energy consumption less than LED light of LD lamps, to
Reduce energy expenditure, is more energy-saving and environmentally friendly.So LD of commercial type etc. is more and more.Also, most of LD shine at present
Bright is to manufacture white light using blue LD excitated fluorescent powders form.
But due to by blue LD excitated fluorescent powders form come manufacture white light in the way of to can only obtain colour temperature always single
White light, so user experience Shortcomings.
How to solve the above problems, is the emphasis of those skilled in the art's concern.
Invention content
In view of this, the purpose of the present invention is to provide a kind of phosphor structures, made with solving LD lamps in the prior art
It is single with the light color temperature sent out in the process, the not strong problem of user experience.
Another object of the present invention is to provide a kind of phosphor structures production methods, are existed with solving LD lamps in the prior art
The light color temperature sent out during use is single, the not strong problem of user experience.
Another object of the present invention, which also resides in, provides a kind of photochromic adjustable illumination device, is existed with solving LD lamps in the prior art
The light color temperature sent out during use is single, the not strong problem of user experience.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows：
In a first aspect, the embodiment of the present invention proposes a kind of phosphor structures, the thickness of the different location of the phosphor structures
Degree is different, and the phosphor structures are used to be reflected or be transmitted after the light sent out that different location receives a light source,
To propagate out different photochromic of colour temperature.
Further, the phosphor structures include stairstepping phosphor structures or conical phosphor structures or truncated cone-shaped
Phosphor structures, so that the colour temperature of the phosphor structures is sequentially increased or is sequentially reduced from the inside to the outside.
Further, the material for making the phosphor structures includes fluorescent powder and heat-resisting material.
Second aspect, the embodiment of the present invention additionally provide a kind of phosphor structures production method, the phosphor structures system
Include as method：
Heat-resisting material is mixed and is fitted into cylindrical die and is sintered, to form fluorescence column；
It polishes the fluorescence column, so that the thickness of the different location of the phosphor structures is different.
Further, described to polish the fluorescence column, so that the thickness of the different location of the phosphor structures
Different steps include：
The fluorescence column is polished into stairstepping phosphor structures or conical phosphor structures or truncated cone-shaped fluorophor knot
Structure.
The third aspect, the embodiment of the present invention additionally provide a kind of photochromic adjustable illumination device, the photochromic adjustable illumination dress
It sets including light source and phosphor structures, the light source is placed in the side of the phosphor structures, and the light that the light source is sent out
The phosphor structures are propagated to, and the different location Jing Guo the phosphor structures is reflected or transmitted, it is outstanding to propagate
Temperature is different photochromic.
Further, the photochromic adjustable illumination device further includes rotating disc, and the phosphor structures connect with rotating disc is stated
It connects, the light source is placed in the side of the close phosphor structures of the rotating disc.
Further, the rotating disc includes transparent rotating disc or high reflection rotating disc.
Further, light source includes blue laser diode.
Further, the light that the blue laser diode is sent out is vertical with the fluorescence ring structure.
Compared with the prior art, the invention has the advantages that：
The present invention provides a kind of phosphor structures and preparation method thereof and photochromic adjustable illumination device, the fluorophor knots
The thickness of the different location of structure is different.In actual use process light is can control when user needs to adjust the colour temperature of lighting device
Source or phosphor structures movement so that the light that light source is sent out can be beaten in the phosphor structures of different-thickness.Due to glimmering
Body of light structure has the characteristic that colour temperature is inversely proportional to the thickness, so working as the different positions that the light that light source is sent out passes through phosphor structures
It sets after being reflected or being transmitted, the photochromic of different-colour can be propagated out.It allows users to that photochromic colour temperature is adjusted,
The experience sense of user is more preferable.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of diagrammatic cross-section of phosphor structures provided in an embodiment of the present invention.
Fig. 2 shows the diagrammatic cross-sections of another phosphor structures provided in an embodiment of the present invention.
Fig. 3 shows a kind of flow chart for phosphor structures production method that the embodiment of the present invention provides.
Fig. 4 shows the diagrammatic cross-section of photochromic adjustable illumination device provided in an embodiment of the present invention.
Icon：100- phosphor structures；The photochromic adjustable illumination devices of 200-；210- light sources；220- rotating discs.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, the detailed description of the embodiment of the present invention to providing in the accompanying drawings is not intended to limit claimed invention below
Range, but it is merely representative of the selected embodiment of the present invention.Based on the embodiment of the present invention, those skilled in the art are not doing
The every other embodiment obtained under the premise of going out creative work, shall fall within the protection scope of the present invention.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.Meanwhile the present invention's
In description, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " connected ", " connection " shall be understood in a broad sense,
It for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connection, can also be electricity
Connection；It can be directly connected, can also can be indirectly connected through an intermediary the connection inside two elements.For
For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.It ties below
Attached drawing is closed, is elaborated to some embodiments of the present invention.In the absence of conflict, following embodiment and embodiment
In feature can be combined with each other.
First embodiment
It please refers to Fig.1 and Fig. 2, an embodiment of the present invention provides a kind of phosphor structures 100, the phosphor structures 100
The thickness of different location is different.
Have thickness bigger due to phosphor structures 100, the lower characteristic of colour temperature, so in actual use, when
When user needs to adjust the colour temperature of lighting device, light source 210 or phosphor structures 100 can control to move so that light source 210 is sent out
The light gone out can be beaten on the different location of phosphor structures 100, and by the reflection or transmission of phosphor structures 100, from
And propagate out the photochromic of different-colour.It allows users to that photochromic colour temperature is adjusted, the experience sense of user is more preferable.Example
Such as, the colour temperature of lighting device is turned down when user can be at night, colour temperature is turned up during the day, so that user is utilizing illumination
It is more comfortable when device is illuminated.Also, user without need to change different lighting devices with reach obtain different-colour light
The purpose of color, it is simpler thereby using family operation, and user does not need to buy the different lighting device of multiple colour temperatures and replaces,
The purchase cost of user is saved.
Specifically, in the present embodiment, the material for making phosphor structures 100 includes fluorescent powder and heat-resisting material, example
Such as glass powder or ceramic powder heat-resisting material form fluorophor by the way that heat-resisting material and fluorescent powder are sintered post-processing
Structure 100.Of course, in some other embodiments, the material for making phosphor structures 100 is alternatively other materials, this
Embodiment does not do this any restriction.
It should be noted that in the present embodiment, phosphor structures 100 are made using integrally formed mode, and should
100 entirety of phosphor structures is all made of identical raw material and is made, so in processing without considering the problems of raw material so that
Make more convenient, processing technology is simpler.
And it is further desired that explanation, the adjusting of colour temperature, in the present embodiment, fluorophor knot are carried out for the ease of user
The colour temperature of structure 100 is sequentially increased or is sequentially reduced from the inside to the outside, to form gradual change colour temperature, when user is carrying out lighting device
, can more precisely when the adjusting of colour temperature, more convenient is adjusted.In order to achieve the effect that colour temperature gradual change, in the present embodiment
In, phosphor structures 100 can be stairstepping phosphor structures 100 or conical phosphor structures 100 or truncated cone-shaped fluorophor
The thickness of structure 100, phosphor structures 100 is sequentially reduced from the inside to the outside.Of course, in some other embodiments, fluorescence
Body structure 100 can also be made as other shapes, and the present embodiment does not do this any restriction.
Second embodiment
Referring to Fig. 3, an embodiment of the present invention provides a kind of 100 production method of phosphor structures, the phosphor structures 100
Production method includes：
Step S101, heat-resisting material is mixed and is fitted into cylindrical die is sintered, to form fluorescence column.
Step S102 polishes to the fluorescence column, so that the thickness of the different location of the phosphor structures 100 is not
Together.
Specifically, in the present embodiment, in the present embodiment, color temperature adjustment, phosphor structures are carried out in order to facilitate user
100 thickness forms the state of a gradual change from the inside to the outside, so fluorescence column is polished into stairstepping fluorophor in the present embodiment
Structure 100 or conical phosphor structures 100 or truncated cone-shaped phosphor structures 100.
3rd embodiment
Referring to Fig. 4, an embodiment of the present invention provides a kind of photochromic adjustable illumination device 200, the photochromic adjustable illumination dress
It includes the phosphor structures 100 described in light source 210, rotating disc 220 and first embodiment to set 200, wherein phosphor structures
100 connect Ei with rotating disc 220, and light source 210 is set to the side of the close phosphor structures 100 of rotating disc 220.
It should be noted that in the present embodiment, light source 210 is blue laser diode, and blue laser diode can
The blue laser along straightline propagation is sent out, when light propagates to phosphor structures 100, is carried out instead by phosphor structures 100
It penetrates or transmits, to form white light.Meanwhile it being reflected or being transmitted by the different location of phosphor structures 100 and can be obtained not
With the white light of colour temperature.
Meanwhile in the present embodiment, if the light that blue laser diode is sent out is beaten always in 100 1 points of phosphor structures
When, phosphor structures 100 are easily damaged, so in the present embodiment, photochromic adjustable illumination device 200 is provided with rotating disc 220,
Phosphor structures 100 are installed on rotating disc 220.In actual use, the meeting of rotating disc 220 high-speed rotation, to drive
Phosphor structures 100 rotate so that, will not be always when the light that blue laser diode is sent out propagates to phosphor structures 100
It beats on one point.And since the shape of phosphor structures 100 is one round, blue laser diode can be made to send out in rotation process
The light gone out is beaten always in the phosphor structures 100 of thickness of the same race, and the normal of the photochromic adjustable illumination device 200 is not interfered with
It uses.
Also, the material in the present embodiment, making rotating disc 220 can be sapphire, glass, ceramics, specular aluminium etc.,
I.e. rotating disc 220 includes transparent rotating disc 220 or translucent rotating disc 220 or high reflection rotating disc 220.When rotating disc 220 is
Transparent rotating disc 220 or translucent rotating disc 220, the light that blue laser diode is sent out are carried out by phosphor structures 100
Transmission is to obtain the white light of different-colour.When rotating disc 220 is high reflection rotating disc 220, what blue laser diode was sent out
Light is reflected by phosphor structures 100 to obtain the white light of different-colour.
Furthermore, it is desirable to explanation, in the present embodiment, in order to make more convenient, the blue laser diode when adjusting
It is placed in the vertical irradiation above of phosphor structures 100, moves by controllable adjustment blue laser diode or controllably phosphor structures
100 position makes blue laser diode be radiated in different-colour phosphor structures 100 and obtains the white light of different-colour.
Also, the difference in phosphor structures 100 in the present embodiment, is beaten by the light that blue laser diode is sent out
Position changes between colour temperature can be accomplished from 2700K to 6500K.Of course, more or less phosphor structures 100 are also provided with, this
Embodiment does not do this any restriction.
In conclusion the present invention provides a kind of phosphor structures and preparation method thereof and photochromic adjustable illumination device,
The thickness of the different location of the phosphor structures is different.In actual use process, when user needs the colour temperature of adjusting lighting device
When, it can control light source or phosphor structures movement so that the light that light source is sent out can beat the fluorophor knot in different-thickness
On structure.Since phosphor structures have the characteristic that colour temperature is inversely proportional to the thickness, so when the light that light source is sent out passes through fluorophor
After the different location of structure is reflected or transmitted, the photochromic of different-colour can be propagated out.It allows users to photochromic
Colour temperature is adjusted, and the experience sense of user is more preferable.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.It should be noted that：Similar label and letter exist
Similar terms are indicated in following attached drawing, therefore, once being defined in a certain Xiang Yi attached drawing, are then not required in subsequent attached drawing
It is further defined and is explained.
Claims (10)
1. a kind of phosphor structures, which is characterized in that the thickness of the different location of the phosphor structures is different, the fluorophor
Structure is different to propagate out colour temperature for being reflected or being transmitted after the light sent out that different location receives a light source
It is photochromic.
2. phosphor structures as described in claim 1, which is characterized in that the phosphor structures include stairstepping fluorophor knot
Structure or conical phosphor structures or truncated cone-shaped phosphor structures, so that the colour temperature of the phosphor structures increases successively from the inside to the outside
Greatly or it is sequentially reduced.
3. phosphor structures as described in claim 1, which is characterized in that the material for making the phosphor structures includes fluorescence
Powder and heat-resisting material.
4. a kind of phosphor structures production method, which is characterized in that the phosphor structures production method includes：
Heat-resisting material is mixed and is fitted into cylindrical die and is sintered, to form fluorescence column；
It polishes the fluorescence column, so that the thickness of the different location of the phosphor structures is different.
5. phosphor structures production method as claimed in claim 4, which is characterized in that described to beat the fluorescence column
Mill, so that the different step of the thickness of the different location of the phosphor structures includes：
The fluorescence column is polished into stairstepping phosphor structures or conical phosphor structures or truncated cone-shaped phosphor structures.
6. a kind of photochromic adjustable illumination device, which is characterized in that the photochromic adjustable illumination device includes that light source is wanted with such as right
The phosphor structures described in 1 to 3 any one are sought, the light source is placed in the side of the phosphor structures, and the light source is sent out
The light gone out propagates to the phosphor structures, and the different location Jing Guo the phosphor structures is reflected or transmitted, with
Propagate out different photochromic of colour temperature.
7. photochromic adjustable illumination device as claimed in claim 6, which is characterized in that the photochromic adjustable illumination device further includes
Rotating disc, the phosphor structures are connect with rotating disc is stated, and the light source is placed in the close fluorophor knot of the rotating disc
The side of structure.
8. photochromic adjustable illumination device as claimed in claim 7, which is characterized in that the rotating disc include transparent rotating disc or
High reflection rotating disc.
9. photochromic adjustable illumination device as claimed in claim 6, which is characterized in that light source includes blue laser diode.
10. photochromic adjustable illumination device as claimed in claim 9, which is characterized in that the blue laser diode was sent out
Light is vertical with the fluorescence ring structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098747.3A CN108302333A (en) | 2018-01-31 | 2018-01-31 | A kind of phosphor structures and preparation method thereof and photochromic adjustable illumination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098747.3A CN108302333A (en) | 2018-01-31 | 2018-01-31 | A kind of phosphor structures and preparation method thereof and photochromic adjustable illumination device |
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|---|---|
| CN108302333A true CN108302333A (en) | 2018-07-20 |
Family
ID=62850680
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810098747.3A Pending CN108302333A (en) | 2018-01-31 | 2018-01-31 | A kind of phosphor structures and preparation method thereof and photochromic adjustable illumination device |
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| CN101344234A (en) * | 2008-08-22 | 2009-01-14 | 友达光电股份有限公司 | Display equipment and its adjustable illuminating module |
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Application publication date: 20180720 |