CN202443143U - Light guide plate and transparent display thereof - Google Patents
Light guide plate and transparent display thereof Download PDFInfo
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- CN202443143U CN202443143U CN2012200385034U CN201220038503U CN202443143U CN 202443143 U CN202443143 U CN 202443143U CN 2012200385034 U CN2012200385034 U CN 2012200385034U CN 201220038503 U CN201220038503 U CN 201220038503U CN 202443143 U CN202443143 U CN 202443143U
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Abstract
The utility model relates to a light guide plate and a transparent display thereof. The light guide plate comprises a first light-out surface, a second light-out surface and a light-in surface, wherein the second light-out surface is arranged opposite to the first light-out surface and contains a plurality of micro structure mesh points, the light-in surface is adjacent to the position between the first light-out surface and the second light-out surface to receive a projecting light ray of a light source, and the outputted light amount of the first light-out surface is more than the outputted light amount of the second light-out surface. The light guide plate and the transparent display thereof have the advantages that not only information but also displaying products behind the transparent display can be seen through the display surface of the transparent display, and therefore marketing video contents on the display surface can be more vivid, buying intention of customers can be increased and more marketing methods of the displaying products are provided.
Description
Technical field
The utility model relates to a kind of article display cabinet, relates in particular to the LGP of transparent display in this article display cabinet.
Background technology
So-called transparent display is meant not only can also can see through the scene that this display surface is seen the rear in its display surface display image.This transparent display can be applicable to the on glass of vehicle, house or advertising thing, so that the user to be provided required relevant information, so, estimates that the application of this transparent display will increase substantially.
Yet; This transparent display adopts organic luminous panel and plasma display that required light source is provided usually; So; If these a little conventional transparent displays change when adopting other back side light source and from the rear display light source of LCD panel being provided, the back side light source at rear possibly hinder its transparency, reduce the performance of its see-through.
This shows that above-mentioned existing transparent display obviously still exists inconvenience and defective, and remains further to be improved.Therefore, how can solve above-mentioned inconvenience and defective effectively, real one of the current important research and development problem that belongs to also becomes current association area and needs improved target badly.
Summary of the invention
The utility model technical issues that need to address have provided a kind of LGP, are intended to solve the above problems.
The utility model also provides the transparent display that adopts above-mentioned LGP.
In order to solve the problems of the technologies described above, the utility model is realized through following technical scheme:
The LGP of the utility model comprises: one first exiting surface; One second exiting surface; Described second exiting surface and this first exiting surface are oppositely arranged, and this second exiting surface comprises a plurality of microstructures site; An and incidence surface; Described incidence surface is adjacent between this first exiting surface and this second exiting surface, in order to receive one of light source throw light, the amount of light that the amount of light that this first exiting surface is exported is exported greater than this second exiting surface.
The transparent display of the utility model comprises: a light source; One tool transparency display panels, and a single LGP; Described single LGP directly stacks on one of this display panels side; Described single LGP comprises: one first exiting surface; One second exiting surface; Described second exiting surface and this first exiting surface are oppositely arranged, and this second exiting surface comprises a plurality of microstructures site; An and incidence surface; Described incidence surface is adjacent between this first exiting surface and this second exiting surface, in order to receive one of light source throw light, the amount of light that the amount of light that this first exiting surface is exported is exported greater than this second exiting surface.
Compared with prior art; The beneficial effect of the utility model is: can see information on the display surface by transparent display; The display surface that can see through transparent display is again seen the exhibiting product that is positioned at the transparent display rear; Make it by marketing video content lively on the display surface, increase client's purchase intention and more exhibiting product marketing mode.
Description of drawings
The 1st figure illustrates the utility model article display cabinet decomposing schematic representation in one embodiment.
2A figure illustrates the constitutional diagram of the article display cabinet of the 1st figure.
2B figure illustrates the partial enlarged drawing of 2A figure M1 in the position.
The 3rd figure illustrates the front elevation of the article display cabinet of the 1st figure.
The 4th figure illustrates the utility model article display cabinet decomposing schematic representation in another embodiment.
5A figure illustrates the constitutional diagram of the article display cabinet of the 4th figure.
5B figure illustrates the partial enlarged drawing that 5A schemes the M2 in the position.
6A figure～the 6E figure illustrates the partial schematic diagram of microstructure site under each changes of the utility model LGP respectively.
The 7th figure illustrates the synoptic diagram of the display panels of the utility model transparent display.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
The utility model is for disclosing a kind of article display cabinet, in order to provide personnel in watching the information on displaying articles and the transparent display simultaneously on the cover outside the article display cabinet.
The utility model is for disclosing a kind of transparent display and LGP, can see the information on the display surface of transparent display in order to allow the user, and the display surface that can see through transparent display again seen the object that is positioned at the transparent display rear.
One of the utility model aspect provides a kind of article display cabinet, transparent display and LGP.The article display cabinet comprises a cabinet, an outer cover and a transparent display.Cabinet includes a groove.This groove of outer cover cover cap, and groove surrounds one in order to place the spacial flex of at least one exhibiting product therewith.Transparent display is located on the outer cover, and transparent display comprises a light source, a display panels and a single LGP.Light source in order to throw light to LGP.The display panels tool transparency.Single LGP directly stacks on one of display panels side, and this single LGP comprises one first exiting surface, one second exiting surface and an incidence surface.Second exiting surface and first exiting surface are oppositely arranged, than first exiting surface away from spacial flex.Light source in order to throw light to incidence surface.Incidence surface is adjacent between first exiting surface and second exiting surface, in order to the throw light of reception light source, and all towards first exiting surface and the second exiting surface bright dipping.Second exiting surface is arranged with a plurality of microstructures site, this slightly the distribution of structure site enough disperse, be enough to see through display panels and clearly present exhibiting product.The amount of light exported by second exiting surface greater than light source of the amount of light exported by first exiting surface of light source wherein.
See also the 1st figure, 2A figure with shown in the 2B figure, wherein the 1st figure illustrates the decomposing schematic representation of the utility model article display cabinet 100 in an embodiment; 2A figure illustrates the constitutional diagram of the article display cabinet 100 of the 1st figure; And 2B figure illustrates the partial enlarged drawing that 2A schemes the M1 in the position.Article display cabinet 100 among this embodiment for example is a vending machine or a showcase etc.Article display cabinet 100 comprises a cabinet 200, an outer cover 300 and a transparent display 400.Cabinet 200 includes one or more groove 210, and groove 210 can be by 211 being separated into a plurality of compartments at interval.Outer cover 300 is transparence, but this groove 210 of cover cap, and behind this groove 210 of cover cap, groove 210 crosses one in order to place the spacial flex 212 of exhibiting product 214 therewith.Transparent display 400 is located on the outer cover 300.Transparent display 400 comprises a light source 410, a display panels 420 and a LGP 430.The display panels 420 tools transparency, and LGP 430 directly stacks on one of display panels 420 side.Light source 410 is in order to throw light to LGP 430.
About LGP 430; Specifically, LGP 430 is template or wedge type, comprises one of to be oppositely arranged first exiting surface 431 and one second exiting surface 432; And around this first exiting surface 431,432 more than sides (like incidence surface 433) of second exiting surface; Wherein away from spacial flex 212, and the area of arbitrary side is less than the area of this first exiting surface 431 or second exiting surface 432 than first exiting surface 431 for second exiting surface 432, and is adjacent between first exiting surface 431 and second exiting surface 432; And behind the throw light that receives light source 410, let throw light all towards first exiting surface 431 and 432 bright dippings of second exiting surface.
Particularly among this embodiment; See also the 1st figure with shown in the 2B figure, LGP 430 directly stacks on display panels 420 near one of spacial flex 212 side, makes LGP 430 between spacial flex 212 and display panels 420; And second exiting surface 432 is between the display panels 420 and first exiting surface 431; So with respect to spacial flex 212, display panels 420 is positioned at side outside the LGP 430.
See also the 1st figure with shown in the 3rd figure, the 3rd figure illustrates the front elevation of the article display cabinet 100 of the 1st figure.Second exiting surface 432 disposes a plurality of microstructures site 440.This is distributed on second exiting surface 432 structure site 440 slightly; Can strengthen throw light unequally towards first exiting surface 431 and 432 bright dippings of second exiting surface, the amount of light L2 that the amount of light L1 that makes light source 410 exported by first exiting surface 431 is exported by second exiting surface 432 greater than light source 410.For example, the amount of light L2 that amount of light L1 that light source 410 is exported by first exiting surface 431 and light source 410 are exported by second exiting surface 432 is 6: 4, yet the utility model is not limited thereto.
In addition; Since this slightly the distribution of structure site 440 enough disperse; Make that being enough to see through display panels 420 clearly presents exhibiting product 214; The display surface 403 that lets personnel can see through transparent display 400 is clear that exhibiting product 214, and the display surface 403 that can see through transparent display 400 again is clear that the information 404 on the transparent display 400.(the 3rd figure)
For instance; This slightly the total area of structure site 440 on second exiting surface 432 greater than 0; Smaller or equal to 78.5% of the area of second exiting surface 432; Further, this slightly the total area of structure site 440 on second exiting surface 432 for example account for second exiting surface 432 area 0.5%～78.5%.
See also the 4th figure, 5A figure with shown in the 5B figure, the 4th figure illustrates the decomposing schematic representation of the utility model article display cabinet 101 in another embodiment; 5A figure illustrates the constitutional diagram of the article display cabinet 101 of the 4th figure; And 5B figure illustrates the partial enlarged drawing that 5A schemes the M2 in the position.
Among another embodiment, transparent display 401 also is located on the outer cover 300.Seek for LGP 430 ' in contrast to the 1st and directly stack on display panels 420 ' away from one of spacial flex 212 side (the 4th figure, 5B figure); Make display panels 420 ' be positioned between spacial flex 212 and the LGP 430 ', and first exiting surface 431 is between the display panels 420 ' and second exiting surface 432.So with respect to spacial flex 212, display panels 420 ' is positioned at side within the LGP 430 '.See also 5A figure with shown in the 5B figure.Second exiting surface 432 disposes a plurality of microstructures site 440.This is distributed on second exiting surface 432 structure site 440 slightly; Can strengthen throw light cloth equably towards first exiting surface 431 and 432 bright dippings of second exiting surface, the amount of light L2 that the amount of light L1 that makes light source 410 exported by first exiting surface 431 is exported by second exiting surface 432 greater than light source 410.For example, the amount of light L2 that amount of light L1 that light source 410 is exported by first exiting surface 431 and light source 410 are exported by second exiting surface 432 is 6: 4, yet the utility model is not limited thereto.
In addition; Since this slightly the distribution of structure site 440 enough disperse; Make that being enough to see through display panels 420 ' clearly presents exhibiting product 214 with LGP 430 '; The display surface 403 that lets personnel can see through transparent display 401 is clear that exhibiting product 214, and the display surface 403 that can see through transparent display 401 again is clear that the information 404 (the 3rd figure) on the transparent display 401.
For instance; This slightly the total area of structure site 440 on second exiting surface 432 greater than 0; Smaller or equal to 78.5% of the area of second exiting surface 432; Further, this slightly the total area of structure site 440 on second exiting surface 432 for example account for second exiting surface 432 area 0.5%～78.5%.
See also shown in 6A figure～the 6E figure, the microstructure site 440 that 6A figure～the 6E figure illustrates the utility model LGP respectively changes following partial schematic diagram in each.
In 6A figure, this is structure site 440 rounded potholes slightly, and each microstructure site 440 has between a vertical section difference H, a bore P and the wantonly two adjacent microstructure sites 440 and has a spacing distance G, and vertical section difference H is less than spacing distance G.What need definition is, this slightly the vertical section difference H of structure site 440 mean profound o'clock of one of which to the vertical range between second exiting surface, 432 isoplanars.This slightly the bore P of structure site 440 mean pothole in the isoplanar internal diameters size of second exiting surface 432.Yet, the utility model in this slightly outside the structure site 440 type be not limited to circular pothole or circular salient point.In other embodiment of the utility model, the section shape of salient point can be hemisphere, semiellipsoid, pyramid or its combination.
See also 6A figure again with shown in the 6B figure, this is structure site 440 spacing distance G each other all consistent (6A figure) or inconsistent (6B figure) each other slightly.For example; Among the 6B figure; This slightly structure site 440 spacing distance G1～G3 each other be along with being inversely proportional to of the incidence surface 433 of each specific microstructure site 440 and LGP apart from size, in other words, more away from this structure site 440 slightly of the incidence surface 433 of LGP; Its spacing distance G1～G3 to each other is more little, and distribution density of structure site 440 is big more slightly for this.
See also 6A figure again with shown in the 6C figure, this is the bore P all consistent (6A figure) or inconsistent (6C figure) each other of structure site 440 slightly.For example, among the 6C figure, this slightly the bore P1～P4 of structure site 440 are being directly proportional along with the incidence surface 433 of each specific microstructure site 440 and LGP apart from size.In other words, get over the microstructure site 440 away from the incidence surface 433 of LGP, its bore P1～P4 is big more.
See also 6A figure again with shown in the 6D figure, this is the vertical section difference H all consistent (6A figure) or inconsistent (6D figure) of structure site 440 slightly.For example, among the 6D figure, this slightly the vertical section difference H1～H4 of structure site 440 are being directly proportional along with the incidence surface 433 of each specific microstructure site 440 and LGP apart from size.In other words, get over the microstructure site 440 away from the incidence surface 433 of LGP, its vertical section difference is big more.
In addition, in the another variation of the utility model, the ratio of the vertical section difference H of each microstructure site 440 and its bore P is 0.4～0.9, that is when the vertical section difference H of each microstructure site 440 was 4 microns, its bore P was 9 microns, by that analogy.
See also 6A figure again with shown in the 6E figure; This is when structure site 440 is circular pothole or circular salient point slightly; Have a center of circle 441 (being the profound point or the utmost point salient point of microstructure site 440) and a circumference 442 (being around the microstructure site 440), the angle theta of two line S of the circumference 442 of 441 both sides, the 441 connection centers of circle is 140 °～179 ° from the center of circle.
When the angle theta of each microstructure site 440 is 140 °～179 °; Most light can be by microstructure site 440 reflection and to spacial flex 212 bright dippings (the ratio Yue Keda of bright dipping be more than 60%), and the light of few part can be by refraction oppositely towards display surface 403 bright dippings (ratio of bright dipping then is about below 40%) of transparent display.
Further, among above-mentioned each embodiment, making above-mentioned microstructure site can be formed by processing modes such as chemical etching processing, blasting treatment, radium-shine processing, texture processing or file processing.In addition, the mode of making above-mentioned microstructure site also is not limited only to this, and other for example is divided into chemical etching (Etching), precision optical machinery portrayal method (V-cut), light lithography method (Stamper), internal divergence etc.
In addition, consult again shown in the 1st figure, in one of the utility model option, wall surface covers a reflection horizon 213 within the cabinet 200 corresponding spacial flexs 212.Reflection horizon 213 is like the coat of metal, but reflection ray returns transparent display 400, more clearly to see through the profile that transparent display 400 demonstrates exhibiting product 214.
About the display panels 420 (or 420 ') of the utility model, see also shown in the 7th figure, the 7th figure illustrates the synoptic diagram of the display panels 420 (or 420 ') of the utility model transparent display 400.Display panels 420 (or 420 ') is furnished with thin film transistor (TFT) (TFT) multiple substrate 421 and filter substrate 423, between TFT multiple substrate 421 and filter substrate 423, is combined with liquid crystal layer 422.TFT multiple substrate 421 comprises a plurality of TFT, be configured to cross one another with many grid lines and data lines limiting pixel region and be arranged on a plurality of pixel electrode (not shown) in the pixel region.Filter substrate 423 comprises the black matrix of the clathrate that is used for shielded from light and is formed at redness, green and the blue color filter layer (not shown) between the black matrix.Display panels 420 (or 420 ') more comprises two polarization plates 424,425.Polarization plates 424,425 lays respectively at side outside thin film transistor (TFT) (TFT) multiple substrate 421 and filter substrate 423 display panels 420, uses so that light generation polarization.In addition, in order to improve visually-clear property, display panels 420 does not have reflector plate and light diffusing sheet in an embodiment.
The above-mentioned transparent display that do not limit of the utility model is arranged at the mode on the outer cover, for example, and like the 1st figure; Transparent display 400 can be embedded in one of outer cover 300 opening 310; Perhaps, outer cover 300 is merely an outside framework, or; Outer cover is the transparent cover of an imperforation, and transparent display is attached at (not shown) on this transparent cover.
In addition, the area of transparent display 400 relative transparent covers is not painstakingly restriction also, so transparent display 400 can roughly be equal to the area of transparent cover, also can be merely the local area of transparent cover.The above-mentioned LGP of the utility model is not limit the variation of its thickness size, its soft or hard degree or material selection.The material of this LGP for example can be polyethylene terephthalate (polyethylene Terephthalate; PET), polycarbonate (polycarbonate; PC) or polymethylmethacrylate (Poly (methyl methacrylate) PMMA) waits transparent material.
The above-mentioned light source 410 of the utility model is not limit its form, for example can be light emitting diode (LightEmitting Diode, LED), Organic Light Emitting Diode (Organic Light-Emitting Diodes, OLED), the technical field of fluorescent tube or bulb.In the present embodiment, light source 410 for example is light-emitting diode light bar (LED light bar), comprises a plurality of light-emitting diode components 411 (LED), is set on the circuit board 412 (PCB).
In sum; Article display cabinet, transparent display and the LGP of the utility model can be seen information on the display surface by transparent display; The display surface that can see through transparent display is again seen the exhibiting product that is positioned at the transparent display rear; Make it by marketing video content lively on the display surface, increase client's purchase intention and more exhibiting product marketing mode.
The utility model discloses among each embodiment as above; Be not in order to limit the utility model; Anyly have the knack of this skill; In spirit that does not break away from the utility model and scope, when can doing various changes and retouching, so the protection domain of the utility model is as the criterion when looking the accompanying Claim scope person of defining.
Claims (24)
1. a LGP is characterized in that comprising: one first exiting surface; One second exiting surface; Described second exiting surface and this first exiting surface are oppositely arranged, and this second exiting surface comprises a plurality of microstructures site; An and incidence surface; Described incidence surface is adjacent between this first exiting surface and this second exiting surface, in order to receive one of light source throw light, the amount of light that the amount of light that this first exiting surface is exported is exported greater than this second exiting surface.
2. LGP according to claim 1 is characterized in that: each those microstructure site has that a vertical section is poor, a bore and wantonly two those adjacent microstructure sites have a spacing distance, and this vertical section difference is less than this spacing distance.
3. LGP according to claim 1 is characterized in that: the total area of those microstructure sites accounts for the 0.5%-78.5% of the area of this second exiting surface.
4. LGP according to claim 1 is characterized in that: this amount of light that this amount of light that this first exiting surface is exported and this second exiting surface are exported is 6: 4.
5. LGP according to claim 2 is characterized in that: those microstructure sites this spacing distance to each other is all consistent.
6. LGP according to claim 2 is characterized in that: those microstructure sites this spacing distance system to each other is along with itself and being directly proportional apart from size of this incidence surface.
7. LGP according to claim 2 is characterized in that: this bore of those microstructure sites is consistent each other.
8. LGP according to claim 2 is characterized in that: this bore of those microstructure sites is along with itself and being directly proportional apart from size of this incidence surface.
9. LGP according to claim 2 is characterized in that: this vertical section difference of those microstructure sites is consistent each other.
10. LGP according to claim 2 is characterized in that: this vertical section difference of those microstructure sites is along with itself and being directly proportional apart from size of this incidence surface.
11. LGP according to claim 2 is characterized in that: this vertical section difference of each those microstructure site and the ratio of this bore are 0.4～0.9.
12. LGP according to claim 2 is characterized in that: those microstructure sites are circular pothole or circular salient point, have a center of circle and a circumference, and the angle of two lines that connects this circumference of these both sides, center of circle from this center of circle is 140 °～179 °.
13. a transparent display comprises: a light source; One tool transparency display panels; It is characterized in that also comprising: a single LGP; Described single LGP directly stacks on one of this display panels side; Described single LGP comprises: one first exiting surface; One second exiting surface; Described second exiting surface and this first exiting surface are oppositely arranged, and this second exiting surface comprises a plurality of microstructures site; An and incidence surface; Described incidence surface is adjacent between this first exiting surface and this second exiting surface, in order to receive one of light source throw light, the amount of light that the amount of light that this first exiting surface is exported is exported greater than this second exiting surface.
14. transparent display according to claim 13 is characterized in that: the total area of those microstructure sites accounts for the 0.5%-78.5% of the area of this second exiting surface.
15. transparent display according to claim 13 is characterized in that: this amount of light that this amount of light that this first exiting surface is exported and this second exiting surface are exported is 6: 4.
16. transparent display according to claim 13 is characterized in that: each those microstructure site has that a vertical section is poor, a bore and wantonly two those adjacent microstructure sites have a spacing distance, and this vertical section difference is less than this spacing distance.
17. transparent display according to claim 16 is characterized in that: those microstructure sites this spacing distance to each other is all consistent.
18. transparent display according to claim 16 is characterized in that: those microstructure sites this spacing distance to each other is along with itself and being directly proportional apart from size of this incidence surface.
19. transparent display according to claim 16 is characterized in that: this bore of those microstructure sites is consistent each other.
20. transparent display according to claim 16 is characterized in that: this bore of those microstructure sites is along with itself and being directly proportional apart from size of this incidence surface.
21. transparent display according to claim 16 is characterized in that: this vertical section difference of those microstructure sites is consistent each other.
22. transparent display according to claim 16 is characterized in that: this vertical section difference of those microstructure sites is along with itself and being directly proportional apart from size of this incidence surface.
23. transparent display according to claim 16 is characterized in that: this vertical section difference of each those microstructure site and the ratio of this bore are 0.4～0.9.
24. transparent display according to claim 16; It is characterized in that: those microstructure sites are circular pothole or circular salient point; Have a center of circle and a circumference, the angle of two lines that connects this circumference of these both sides, center of circle from this center of circle is 140 °～179 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200385034U CN202443143U (en) | 2012-02-08 | 2012-02-08 | Light guide plate and transparent display thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200385034U CN202443143U (en) | 2012-02-08 | 2012-02-08 | Light guide plate and transparent display thereof |
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| Publication Number | Publication Date |
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| CN202443143U true CN202443143U (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200385034U Expired - Lifetime CN202443143U (en) | 2012-02-08 | 2012-02-08 | Light guide plate and transparent display thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035155A (en) * | 2014-03-18 | 2014-09-10 | 宁波萨瑞通讯有限公司 | PC (Poly Carbonate) light guide plate |
| CN104077982A (en) * | 2013-03-29 | 2014-10-01 | 联想(北京)有限公司 | Display module and display equipment |
| CN105467675A (en) * | 2015-12-24 | 2016-04-06 | 上海九山电子科技有限公司 | Liquid-crystal refrigerator door structure and producing method thereof |
| CN105467676A (en) * | 2015-12-24 | 2016-04-06 | 上海九山电子科技有限公司 | Liquid crystal display module |
| CN103955018B (en) * | 2014-04-17 | 2016-09-07 | 青岛海信电器股份有限公司 | The manufacture method of a kind of light guide plate mesh point and a kind of light guide plate |
-
2012
- 2012-02-08 CN CN2012200385034U patent/CN202443143U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104077982A (en) * | 2013-03-29 | 2014-10-01 | 联想(北京)有限公司 | Display module and display equipment |
| CN104035155A (en) * | 2014-03-18 | 2014-09-10 | 宁波萨瑞通讯有限公司 | PC (Poly Carbonate) light guide plate |
| CN103955018B (en) * | 2014-04-17 | 2016-09-07 | 青岛海信电器股份有限公司 | The manufacture method of a kind of light guide plate mesh point and a kind of light guide plate |
| CN105467675A (en) * | 2015-12-24 | 2016-04-06 | 上海九山电子科技有限公司 | Liquid-crystal refrigerator door structure and producing method thereof |
| CN105467676A (en) * | 2015-12-24 | 2016-04-06 | 上海九山电子科技有限公司 | Liquid crystal display module |
| CN105467675B (en) * | 2015-12-24 | 2019-07-05 | 上海九山电子科技有限公司 | Liquid crystal refrigerator door structure and preparation method thereof |
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Granted publication date: 20120919 |