CN208477141U - Glass light guide plate - Google Patents
Glass light guide plate Download PDFInfo
- Publication number
- CN208477141U CN208477141U CN201821051071.4U CN201821051071U CN208477141U CN 208477141 U CN208477141 U CN 208477141U CN 201821051071 U CN201821051071 U CN 201821051071U CN 208477141 U CN208477141 U CN 208477141U
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- Prior art keywords
- layer
- guide plate
- light guide
- micro
- nano structure
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The utility model discloses a kind of glass light guide plates comprising: glass light guide plate ontology, the ontology include a light-emitting surface；Micro-nano structure layer, the micro-nano structure layer includes polymeric layer, and the polymeric layer is located at the light-emitting surface or is located at the light-emitting surface opposite side, and the polymeric layer is equipped with micro-nano structure far from the side of the ontology, forms micro-nano structure layer；Quantum dot layer, positioned at the light-emitting surface or positioned at the opposite side of the light-emitting surface.Quantum dot layer can obtain uniform area source white light after the blue light of the linear light source of parallel incidence can be made to excite quantum dot, use the thickness that glass light guide plate ontology, micro-nano structure layer etc. can be also reduced after quantum dot layer.
Description
Technical field
The utility model relates to the technical fields of light guide plate, and more particularly, it is guide-lighting that the utility model relates to a kind of glass
Plate.
Background technique
According to the development of information-intensive society, the demand to various types of display devices for displaying images has increased.
Recently, such as liquid crystal display (LCD), plasma display panel (PDP) and Organic Light Emitting Diode has been utilized
(OLED) the various display devices of display device.
Liquid crystal display device should have back light unit to provide light from outside.Back light unit may include such as light source, lead
Tabula rasa, reflector and upper piece subelement, and can also include at least one frame or chassis as support construction
(chassis), to support the side and the back side of display device.
In the component of back light unit, light guide plate (LGP) is for equably guiding the light from light source to entire
The flat components of display device, and may include being formed on the flat components extremely for the purpose for being uniformly distributed light etc.
Predetermined pattern on a few surface.
In general, light guide plate is made of the light-blocking plastic material of such as polymethyl methacrylate (PMMA).
However, although its with high transparency, due to plastics light guide plate should have intended level or bigger thickness with
Predetermined stiffness etc. is maintained, therefore plastics light guide plate has become strip with slimming whole display device.
In addition, plastics light guide plate has the disadvantages that due to biggish thermal expansion coefficient and higher wet swellability,
Plastics light guide plate is restricted in terms of the arrangement with light source part, and needs additional support construction.
The shortcomings that in order to overcome plastics light guide plate, the glass light guide plate made of glass material is had contemplated that recently.
Utility model content
Based on this, it is necessary to provide a kind of glass light guide plate to solve above-mentioned technical problem.
One technical solution of the utility model is:
A kind of glass light guide plate comprising:
Glass light guide plate ontology, the ontology include a light-emitting surface；
Micro-nano structure layer, the micro-nano structure layer includes polymeric layer, and the polymeric layer is located at the light-emitting surface or position
In the light-emitting surface opposite side, the polymeric layer is equipped with micro-nano structure far from the side of the ontology, forms micro-nano structure layer；
Quantum dot layer, positioned at the light-emitting surface or positioned at the opposite side of the light-emitting surface.
In one embodiment, the micro-nano structure layer and the quantum dot layer are located at the glass light guide plate ontology
Two sides.
In one embodiment, the quantum dot layer has the quantum dot of one or more of particle sizes, and the amount
Son point layer is laminating layer, coating layer or vapor deposition layer.
In one embodiment, the refractive index of the glass light guide plate ontology is n1, the refractive index of the quantum dot layer
For n5, wherein the absolute value of the difference of the n1 and n5 is not more than 0.5.
In one embodiment, the refractive index of the glass light guide plate ontology is n1, and the polymeric layer refractive index is
N2, the refractive index of the quantum dot layer is n5, wherein the absolute value of the difference of any the two of described n1, n2 and n5 is not more than 0.5.
It in one embodiment, further include bonding between the glass light guide plate and the micro-nano structure layer
Layer；It or further include adhesive layer between the glass light guide plate and the micro-nano structure layer, and be located at the micro-nano knot
Bearing bed between structure layer and the adhesive layer.
In one embodiment, the micro-nano structure is cylindrical mirror, lenticule, drawing pattern, CD line, small short-term, Fei Nie
One or more kinds of combinations in your lens.
In one embodiment, the micro-nano structure surface be equipped with optical texture, the optical texture be protrusion and/or
Sunk structure.
In one embodiment, the optical texture is sunk structure, one of them described sunk structure is distributed in more
A micro-nano structure surface.
In one embodiment, the optical texture is sunk structure and in poroid, the crude degree in the hole and is layouted
Spacing is different.
It in one embodiment, further include reflecting layer, the reflecting layer is set to the micro-nano structure layer far from described
The side of ontology or the reflecting layer are set to side of the quantum dot layer far from the ontology.
The utility model has the beneficial effects that
The utility model provides a kind of glass light guide plate, is provided with quantum dot layer, and quantum dot layer can make parallel incidence
Uniform area source white light can be obtained after the blue light excitation quantum dot of linear light source, it is guide-lighting using glass can be reduced after quantum dot layer
The thickness of plate ontology, micro-nano structure layer etc..
Detailed description of the invention
Fig. 1 is a kind of glass light guide plate structural schematic diagram of the utility model；
Fig. 2 is the cross section structure schematic diagram of A-A ' in the utility model Fig. 1；
Fig. 3 is a kind of another structural schematic diagram of glass light guide plate of the utility model；
Fig. 4 is a kind of another structural schematic diagram of glass light guide plate of the utility model；
Fig. 5 is a kind of another structural schematic diagram of glass light guide plate of the utility model；
Fig. 6 is a kind of another structural schematic diagram of glass light guide plate of the utility model；
Fig. 7 is a kind of another structural schematic diagram of glass light guide plate of the utility model.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The better embodiment of the utility model is given in attached drawing.But the utility model can pass through many different forms
To realize, however it is not limited to embodiment disclosed below.On the contrary, the purpose of providing these embodiments is that making practical to this
Novel disclosure understands more thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" packet
Include any and all combinations of one or more related listed items.
The utility model provides a kind of glass light guide plate comprising:
Glass light guide plate ontology, the ontology include a light-emitting surface；When the light of light source enters in ontology from incidence surface, from
Light-emitting surface projects；
Micro-nano structure layer, the micro-nano structure layer includes polymeric layer, and the polymeric layer is located at the light-emitting surface or position
In the light-emitting surface opposite side, the polymeric layer is equipped with micro-nano structure far from the side of the ontology, forms micro-nano structure layer；
When the micro-nano structure layer is set to the light-emitting surface side, light-emitting surface opposite side is equipped with reflecting layer at this time, and light is in ontology
Interior propagation, is projected finally by micro-nano structure, can effectively prevent light in ontology inner total reflection；When the micro-nano structure
Layer this with the light-emitting surface opposite side when, at this time the micro-nano structure layer far from ontology side be equipped with reflecting layer, in this way lead to
Micro-nano structure layer and reflecting layer is crossed to project from light-emitting surface；Wherein, the polymeric layer can be photocuring or heat cure, institute
Micro-nano structure is stated as protrusion and/or sunk structure, the micro-nano structure is cylindrical mirror, lenticule, drawing pattern, CD line, Fresnel
One or more kinds of combinations in lens.In one embodiment, the glass light guide plate ontology and the micro-nano structure layer
Between be equipped with adhesive layer, that is, after micro-nano structure layer is carried out, the light-emitting surface or light-emitting surface phase are bonded in by adhesive layer
Opposite side, at this point, the micro-nano structure layer is single layer structure；
Quantum dot layer, positioned at the light-emitting surface or positioned at the opposite side of the light-emitting surface, to receive the light of light source sending simultaneously
Inspire the light beam of another wavelength.
For example, the quantum dot on the blue light excitation quantum dot layer of parallel incident linear light source, can obtain uniform white light
Luminous efficiency can be improved in area source.Also, glass light guide plate be arranged quantum dot layer after, it is possible to reduce glass light guide plate ontology and/
Or the material thickness of micro-nano structure layer, so that ultra-thin glass light guide plate can be obtained.
Quantum dot layer has the quantum dot namely quantum dot of one or more of particle sizes in one of the embodiments,
Layer can be inspired the light beam of one or more colors.
Quantum dot layer is that laminating layer, coating layer or vapor deposition layer namely quantum dot layer can lead in one of the embodiments,
The mode of mistake is formed, such as fitting, coating or vapor deposition etc..
In one embodiment, the refractive index of glass light guide plate ontology is n1, and the refractive index of quantum dot layer is n5, wherein
The absolute value of the difference of n1 and n5 is not more than 0.5.
In one embodiment, the refractive index of glass light guide plate ontology is n1, and the refractive index of polymeric layer is n2, quantum
The refractive index of point layer is n5, and wherein the absolute value of the difference of any the two of n1, n2 and n5 is not more than 0.5.
In one embodiment, the glass light guide plate bulk refractive index is n1, and the polymeric layer refractive index is n2,
Wherein, the absolute value of the difference of the n1 and n2 is not more than 0.5.
In one embodiment, the glass light guide plate bulk refractive index is n1, and the polymeric layer refractive index is n2,
The adhesive layer refractive index is n3, wherein the absolute value of the difference of described any the two of n1, n2 and n3 is not more than 0.5.
In one embodiment, bearing bed, this kind of structure institute are equipped between the micro-nano structure layer and the adhesive layer
The micro-nano structure layer stated is set to one surface of bearing bed, and then, another surface of bearing bed connects the glass by adhesive layer
Light conducting plate body, bearing bed can be the preferable materials of some translucency such as PET, PMMA, PC.
In one embodiment, the glass light guide plate bulk refractive index is n1, and the polymeric layer refractive index is n2,
The adhesive layer refractive index is n3, and the bearing bed refractive index is n4, and the refractive index of the quantum dot layer is n5, wherein described
The absolute value of the difference of any the two of n1, n2, n3, n4 and n5 is not more than 0.5.
In one embodiment, the micro-nano structure surface be equipped with optical texture, the optical texture be protrusion and/or
Sunk structure, in this way in original micro-nano structure surface in setting optical texture, the light that can preferably make in this way is more
It projects, wherein when the optical texture is sunk structure, the depth of sunk structure can be equal to the height of the micro-nano structure
Degree, it is of course possible to less than the height of the micro-nano structure.The optical texture is cylindrical mirror, lenticule, drawing pattern, CD line, phenanthrene
One or more kinds of combinations in alunite ear lens.
The optical texture is sunk structure in one of the embodiments, one of them described sunk structure is distributed in
The size of multiple micro-nano structure surfaces namely sunk structure is greater than the size of micro-nano structure, and the depth of sunk structure is less than
Equal to the height of micro-nano structure.Sunk structure can be with regular distribution, can also be with random distribution, and the size of sunk structure can be consistent
It can also be inconsistent.Preferably, sunk structure is in poroid, and the crude degree of the side wall in hole and hole spacing of layouting are different, can make
Light-emitting surface light source bright spot is uniform.Micro-nano structure and optical texture can change light propagation route, and the light of parallel incidence is vertically penetrated
Out.Poroid sunk structure makes light extraction efficiency higher, and bright spot is more uniform.
Please refer to Fig. 1 and Fig. 2, a kind of glass light guide plate 100, including light source 101 and glass light guide plate ontology 10；Institute
Stating glass light guide plate ontology 10 includes a light-emitting surface, and the light-emitting surface is equipped with micro-nano structure layer, and the micro-nano structure layer includes poly-
Close nitride layer 40 and micro-nano structure 20, the polymeric layer 40 can be heat-curable glue or optic-solidified adhesive, such as UV glue, described
Polymeric layer 40 is set to the light-emitting surface of the glass light guide plate ontology 10, and it is remote that the micro-nano structure 20 is set to the polymeric layer 40
From 10 side of glass light guide plate ontology, the micro-nano structure 20 can be bulge-structure or sunk structure, the micro-nano structure
20 be cylindrical mirror, one or more combine in lenticule, drawing pattern, CD line, Fresnel lens；20 table of micro-nano structure
Face is additionally provided with optical texture 30, and the micro-nano structure is that trough body structure, cylindrical mirror, lenticule, drawing pattern, CD line, Fresnel are saturating
One or more kinds of combinations in mirror, the optical texture 30 can be raised (not providing in figure) or sunk structure, such as
Rectangular channel or dovetail groove；The opposite side of 10 light-emitting surface of glass light guide plate ontology is equipped with quantum dot layer 70, and quantum dot layer 70 has one
The quantum dot of kind or several particle sizes, and quantum dot layer is laminating layer, coating layer or vapor deposition layer；The glass light guide plate ontology
The opposite side of 10 light-emitting surfaces is equipped with reflecting layer 50, and the quantum dot layer 70 is set between glass light guide plate 10 and reflecting layer 50, institute
Quantum dot layer 70 can be directly arranged in by stating reflecting layer 50, be also possible between quantum dot layer 70 that there are certain intervals.In this way may be used
Light more to be projected well；Certainly, the micro-nano structure layer can also be set to the reflecting layer 50 and the glass
It (is not provided in figure) between light conducting plate body 10.
Fig. 3 and Fig. 4 is please referred to, a kind of glass light guide plate provided, the optical texture on 21 surface of micro-nano structure in Fig. 3
31, using is sunk structure, and is the shape with certain radian, different from Fig. 2.Quantum dot layer 71 in Fig. 3 is located at
In smooth surface, quantum dot layer 71 is different from Fig. 2 between micro-nano structure layer and glass light guide plate ontology 10.Micro-nano knot in Fig. 4
Structure 22 is divided by optical texture 32, at this point, the depth of optical texture 32 is equal to the height of micro-nano structure 22, it may also be said to, optics
32 depth of structure is equal to 22 height of micro-nano structure where optical texture 32.
Referring to Fig. 5, a kind of glass light guide plate is provided, between the glass light guide plate ontology 10 and the micro-nano structure layer
Equipped with adhesive layer 60, by the fitting of micro-nano structure layer and the glass light guide plate ontology 10；Micro-nano structure layer and the adhesive layer 60
Between be also provided with bearing bed (not providing in figure).
Referring to Fig. 6, a kind of glass light guide plate provided, polymeric layer 41 are equipped with far from 10 side of glass light guide plate ontology
Micro-nano structure forms micro-nano structure layer；The micro-nano structure surface of this kind of light guide plate is not provided with micro-nano structure, by adhesive layer 60 with
The glass light guide plate ontology 10 connects.
In other embodiments, micro-nano structure layer can be set to the light-emitting surface opposite side, and reflecting layer 50 is set to described at this time
Side of the micro-nano structure layer far from the glass light guide plate ontology 10.
Referring to Fig. 7, providing a kind of glass light guide plate, the optical texture 33 on micro-nano structure 23 is sunk structure, wherein
One sunk structure distribution and multiple micro-nano structures 23.Optical texture 33 in poroid, aperture, layout by the crude degree of the hole wall in hole
Spacing is randomly provided, and the area source bright spot that optical texture 33 helps light-emitting surface to project is uniform.
The utility model provides a kind of glass light guide plate, uses micro-nano structure or the use of polymer formation in light emission side
Attaching process makes micro-nano structure be located at light-emitting surface or light-emitting surface opposite side, is greatly enhanced in this way in glass light guide plate
Yield, and different micro-nano structures is set according to different requirements, more convenient and cost is also greatly reduced.
The optical texture being arranged on micro-nano structure further improves optical efficiency, and keeps area source more uniform.
The utility model provides a kind of glass light guide plate, and quantum dot layer is arranged with modes such as coating, vapor deposition, fittings.Quantum
Point layer can obtain uniform area source white light after the blue light of the linear light source of parallel incidence can be made to excite quantum dot, use quantum dot
The thickness of glass light guide plate ontology, micro-nano structure layer etc. can be reduced after layer, so as to reduce the integral thickness of glass light guide plate,
It is suitble to slimming development trend.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, above in conjunction with attached drawing to this
The specific embodiment of utility model is described in detail.Elaborate many details in order to abundant in the above description
Understand the utility model.But the utility model can be implemented with being much different from other way described above, this field
Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by public above
The limitation for the specific embodiment opened.Also, each technical characteristic of embodiment described above can be combined arbitrarily, to make to retouch
It states succinctly, combination not all possible to each technical characteristic in above-described embodiment is all described, as long as however, these skills
Contradiction is not present in the combination of art feature, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (11)
1. a kind of glass light guide plate, characterized in that it comprises:
Glass light guide plate ontology, the ontology include a light-emitting surface；
Micro-nano structure layer, the micro-nano structure layer includes polymeric layer, and the polymeric layer is located at the light-emitting surface or is located at institute
Light-emitting surface opposite side is stated, the polymeric layer is equipped with micro-nano structure far from the side of the ontology, forms micro-nano structure layer；
Quantum dot layer, positioned at the light-emitting surface or positioned at the opposite side of the light-emitting surface.
2. glass light guide plate according to claim 1, which is characterized in that the micro-nano structure layer and the quantum dot layer position
In the two sides of the glass light guide plate ontology.
3. glass light guide plate according to claim 1 or 2, which is characterized in that the quantum dot layer has one or more
The quantum dot of particle size, and the quantum dot layer is laminating layer, coating layer or vapor deposition layer.
4. glass light guide plate according to claim 3, which is characterized in that the refractive index of the glass light guide plate ontology is
N1, the refractive index of the quantum dot layer is n5, wherein the absolute value of the difference of the n1 and n5 is not more than 0.5.
5. glass light guide plate according to claim 3, which is characterized in that the refractive index of the glass light guide plate ontology is
N1, the polymeric layer refractive index are n2, and the refractive index of the quantum dot layer is n5, wherein described n1, n2 and n5 any two
The absolute value of the difference of person is not more than 0.5.
6. glass light guide plate according to claim 3, which is characterized in that further include be located at the glass light guide plate with it is described
Adhesive layer between micro-nano structure layer；It or further include bonding between the glass light guide plate and the micro-nano structure layer
Layer, and the bearing bed between the micro-nano structure layer and the adhesive layer.
7. glass light guide plate according to claim 1, which is characterized in that the micro-nano structure is cylindrical mirror, lenticule, drawing
Silking, CD line, small short-term, one or more kinds of combinations in Fresnel Lenses.
8. glass light guide plate according to claim 1 or claim 7, which is characterized in that the micro-nano structure surface is equipped with optics knot
Structure, the optical texture are protrusion and/or sunk structure.
9. glass light guide plate according to claim 8, which is characterized in that the optical texture is sunk structure, wherein one
A sunk structure is distributed in multiple micro-nano structure surfaces.
10. glass light guide plate according to claim 8, which is characterized in that the optical texture is sunk structure and is in hole
Shape, the crude degree in the hole and spacing of layouting are different.
11. glass light guide plate according to claim 2, which is characterized in that further include reflecting layer, the reflecting layer is set to
Side or the reflecting layer of the micro-nano structure layer far from the ontology are set to the quantum dot layer far from the ontology
Side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810026462.9A CN107976737A (en) | 2018-01-11 | 2018-01-11 | A kind of glass light guide plate |
| CN2018100264629 | 2018-01-11 |
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| CN208477141U true CN208477141U (en) | 2019-02-05 |
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| CN201810026462.9A Pending CN107976737A (en) | 2018-01-11 | 2018-01-11 | A kind of glass light guide plate |
| CN201810722814.4A Pending CN109031505A (en) | 2018-01-11 | 2018-07-04 | A kind of glass light guide plate |
| CN201821051071.4U Active CN208477141U (en) | 2018-01-11 | 2018-07-04 | Glass light guide plate |
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| CN201810026462.9A Pending CN107976737A (en) | 2018-01-11 | 2018-01-11 | A kind of glass light guide plate |
| CN201810722814.4A Pending CN109031505A (en) | 2018-01-11 | 2018-07-04 | A kind of glass light guide plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109752786A (en) * | 2017-11-03 | 2019-05-14 | 路志坚 | Light-guide device and backlight arrangement |
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| TWI475309B (en) * | 2012-11-06 | 2015-03-01 | Wistron Corp | Electronic paper display |
| CN206584059U (en) * | 2017-03-11 | 2017-10-24 | 昇印光电（昆山）股份有限公司 | A kind of optical thin film |
| CN108107502A (en) * | 2017-12-21 | 2018-06-01 | 吴丽莹 | A kind of glass light guide plate |
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2018
- 2018-01-11 CN CN201810026462.9A patent/CN107976737A/en active Pending
- 2018-07-04 CN CN201810722814.4A patent/CN109031505A/en active Pending
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| CN109031505A (en) | 2018-12-18 |
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Effective date of registration: 20190801 Address after: Suzhou City, Jiangsu Province, Yushan Town, Kunshan City, 215300 Yuan Feng Road No. 33, room 2 Patentee after: Printing and optical (Kunshan) Limited by Share Ltd Address before: 150006 Room 902, Unit 1, 3 Gardening District, Nangang District, Harbin City, Heilongjiang Province Patentee before: Wu Liying |