CN214311193U - Membrane structure, liquid crystal blackboard and liquid crystal writing board - Google Patents
Membrane structure, liquid crystal blackboard and liquid crystal writing board Download PDFInfo
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- CN214311193U CN214311193U CN202023276473.4U CN202023276473U CN214311193U CN 214311193 U CN214311193 U CN 214311193U CN 202023276473 U CN202023276473 U CN 202023276473U CN 214311193 U CN214311193 U CN 214311193U
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- 239000012528 membrane Substances 0.000 title claims abstract description 18
- 125000006850 spacer group Chemical group 0.000 claims abstract description 33
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- 239000011248 coating agent Substances 0.000 claims abstract description 19
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- 238000000034 method Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 8
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- 230000006750 UV protection Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 230000003098 cholesteric effect Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
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Abstract
The utility model provides a membrane structure, liquid crystal blackboard and liquid crystal clipboard, the membrane structure includes: the liquid crystal display panel comprises a first conductive layer, a first insulating layer, a liquid crystal layer, a second insulating layer and a second conductive layer which are sequentially stacked; an AG coating is arranged on one side, away from the first insulating layer, of the first conducting layer, an OCA (optically clear adhesive) back glue is arranged on one side, away from the second insulating layer, of the second conducting layer, and a plurality of spacers are fixed in the second insulating layer; the existence of the anti-ultraviolet AG coating ensures the stability of the liquid crystal blackboard in the long-term use process; the existence of the insulating layer ensures that the liquid crystal blackboard cannot have the problems of breakdown and short circuit in the power-on erasing process; meanwhile, the spacers are uniformly distributed in the insulating layer, the stability of the spacers is guaranteed, the spacers cannot move along with the extension of time, the OCA glue film is replaced by the OCA gum on the lower layer, the production process is simplified, and the product yield is improved.
Description
Technical Field
The utility model relates to a liquid crystal display technology field, in particular to diaphragm structure, liquid crystal blackboard and liquid crystal clipboard.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The writing and erasing of the liquid crystal blackboard are realized by that the liquid crystal arrangement changes when the cholesteric bistable liquid crystal is stressed, so that visible light with specific wavelength can be reflected, a writing area presents green, and the liquid crystal arrangement change caused by writing can be recovered when the upper and lower conducting layers are electrified, so that the visible light can be completely transmitted, and the green erasing is realized.
The liquid crystal blackboard has the advantages that the liquid crystal blackboard is completely free of backlight display, has a great effect on eyesight protection of teachers and students, simultaneously does not need consumables such as chalks, and completely avoids the phenomenon that teachers and students eat chalk dust.
According to the characteristics, the qualified liquid crystal blackboard has the following properties of extremely strong ultraviolet aging resistance, extremely high scratch resistance and anti-glare property, and meanwhile, the liquid crystal blackboard can keep stable in the long-time use process, liquid crystals do not droop, the manufacturing process is simple, and the yield is high.
The inventor finds that the film structures commonly used for the liquid crystal blackboard at present have two types, one type is an upper conductive film and a lower conductive film and an intermediate liquid crystal layer, spacers with certain particle sizes are uniformly distributed in the liquid crystal layer, and an anti-scratching and anti-glare AG coating layer is coated on the non-conductive surface of the upper conductive film. During production, the OCA adhesive film is used for adhering the liquid crystal film and the substrate together, and the specific implementation is that the OCA adhesive film is firstly adhered on the substrate, and then the liquid crystal film is adhered on the OCA adhesive film. The liquid crystal blackboard with the structure has the advantages that the production process is complex, the product yield is reduced due to the large-size fitting, meanwhile, the spacers are distributed in the liquid crystal, the spacers can droop along with the liquid crystal along with the extension of time, the display difference of lower and upper areas is caused, the risk of short circuit breakdown is gradually increased, the whole liquid crystal blackboard does not have ultraviolet aging resistance, the service life is short, and the specific structure is shown in figure 1.
The second is that the upper and lower conductive films and the middle liquid crystal layer are added, spacers with certain particle sizes are uniformly distributed in the liquid crystal layer, and an AG film with an anti-ultraviolet function is attached to the non-conductive surface of the upper conductive layer, and the specific structure is that a PET film with certain thickness is coated with an anti-scratch and anti-glare common AG coating on one side, and an OCA gum with an anti-ultraviolet function is coated on the other side, so that the AG film with the anti-ultraviolet function is attached to the liquid crystal film, the ultraviolet resistance of the liquid crystal blackboard is improved, but a large-size attaching operation is added in the manufacturing process, the yield of products is further reduced, and the specific structure is shown in figure 2.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a membrane structure, a liquid crystal blackboard and a liquid crystal writing board, wherein the existence of an anti-ultraviolet AG coating layer ensures the stability of the liquid crystal blackboard in the long-term use process; the existence of the insulating layer ensures that the liquid crystal blackboard cannot have the problems of breakdown and short circuit in the power-on erasing process; meanwhile, the spacers are uniformly distributed in the insulating layer, the stability of the spacers is guaranteed, the spacers cannot move along with the extension of time, the OCA glue film is replaced by the OCA gum on the lower layer, the production process is simplified, and the product yield is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses the first aspect provides a membrane structure.
A film structure comprising: the liquid crystal display panel comprises a first conductive layer, a first insulating layer, a liquid crystal layer, a second insulating layer and a second conductive layer which are sequentially stacked;
one side that first conducting layer kept away from first insulating layer is equipped with the AG coating, and one side that second conducting layer kept away from the second insulating layer is equipped with the OCA gum, is fixed with a plurality of spacers in the second insulating layer.
As some possible implementations, a plurality of dispersed particles with different particle sizes are provided in the AG coating, and an anti-ultraviolet agent is added in the AG coating.
As some implementations are possible, the spacers are uniformly distributed within the second insulating layer.
By way of further limitation, the spacing between each adjacent spacer is the same.
By way of further limitation, the spacers are each the same shape and size.
As some possible implementations, the portions of the spacers in the liquid crystal layer are the same size.
As some implementations are possible, the first insulating layer and/or the second insulating layer have a thickness of 0.7 μm to 2 μm.
As some possible implementations, the spacer has a particle size of 1.5 μm to 5 μm.
As some possible implementations, the thickness of the OCA gum is 20 μm to 100 μm.
The utility model discloses the second aspect provides a liquid crystal blackboard, include the utility model discloses the first aspect the membrane structure.
The third aspect of the present invention provides a liquid crystal writing board, comprising the first aspect of the present invention.
Compared with the prior art, the beneficial effects of the utility model are that:
1. membrane structure, liquid crystal blackboard and liquid crystal clipboard, the stability of liquid crystal blackboard in long-term use has been guaranteed in the existence of anti ultraviolet AG coating.
2. Membrane structure, liquid crystal blackboard and liquid crystal clipboard, the existence of insulating layer has guaranteed that the problem of puncture, short circuit can not appear at the in-process that the circular telegram was erased to the liquid crystal blackboard.
3. Membrane structure, liquid crystal blackboard and liquid crystal clipboard, spacer evenly distributed has guaranteed the stability of spacer in the insulating layer, can not remove along with the extension of time.
4. Membrane structure, liquid crystal blackboard and liquid crystal clipboard, lower floor's OCA gum replaces the OCA glued membrane, has simplified production technology, has improved the product yield.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic diagram of a first general film structure mentioned in the background art.
Fig. 2 is a schematic diagram of a second conventional membrane structure mentioned in the background art.
Fig. 3 is a schematic view of a membrane structure provided in embodiment 1 of the present invention.
1. AG coating; 2. a first conductive layer; 3. a first insulating layer; 4. a spacer; 5. a second insulating layer; 6. a second conductive layer; 7. carrying out OCA gum application; 8. a liquid crystal; 9. anti-ultraviolet OCA; 10. a PET film.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
Example 1:
as shown in fig. 3, embodiment 1 of the present invention provides a membrane structure, including: a first conductive layer 2 (i.e., an upper conductive layer, which is preferably a conductive film herein), a first insulating layer 3 (i.e., an upper insulating layer), a liquid crystal layer 8, a second insulating layer 5 (i.e., a lower insulating layer), and a second conductive layer 6 (i.e., a lower conductive layer, which is preferably a conductive film herein) which are sequentially stacked;
one side that first conducting layer 2 kept away from first insulating layer is equipped with AG coating 1, and one side that second conducting layer 6 kept away from the second insulating layer is equipped with the OCA gum, is fixed with a plurality of spacers 8 in the second insulating layer.
In this embodiment, the spacers are uniformly distributed in the second insulating layer, the distances between adjacent spacers are the same, the shapes and sizes of the spacers are the same, and the sizes of the spacers in the liquid crystal layer are the same.
The existence of the upper and lower insulating layers ensures that the problems of breakdown and short circuit cannot be caused when the liquid crystal blackboard or the liquid crystal writing board is electrified and erased; the insulation resistivity of the insulation coating is more than or equal to 107Omega, preferably 2X 107Omega; the thickness of the insulating coating is 0.7 μm to 2 μm, preferably 1 μm; the peel force of the insulating coating is 50g to 200g, preferably 100 g.
The spacers in the lower insulating layer ensure the consistency of the space between the liquid crystal blackboard and the liquid crystal writing board, avoid the liquid crystal sagging phenomenon of the liquid crystal blackboard when the liquid crystal blackboard is vertically placed for long time, and simultaneously keep the width of the handwriting consistent; the spacer has a particle diameter of 1.5-5 μm, preferably 3 μm, and is made of PMMA, PS, or SiO2One kind of (1).
The upper AG coating plays a role in diffuse scattering of visible light by adding dispersed particles with different particle sizes, reduces reflection of the visible light, ensures the anti-glare effect of the liquid crystal blackboard, improves the hardness of the surface of the PET conductive film due to the existence of the coating, and ensures high wear resistance of the surface of the liquid crystal blackboard; by adding the uvioresistant agent into the AG coating formula, the AG coating has the uvioresistant function, the stability of the liquid crystal blackboard in a long-time natural environment is ensured, and the service life is prolonged.
Specifically, when the wavelength is less than or equal to 380nm, the ultraviolet blocking rate of the AG coating is more than or equal to 99.5 percent; the hardness of the AG coating pencil is 500g, 3H-6H; the AG coating has a haze of 25% to 40%, preferably 30%.
The existence of the OCA gum of the lower layer can bond the liquid crystal film and the black substrate together, simplify the production process and improve the yield of products.
The OCA back adhesive is a pressure sensitive adhesive, and the thickness of the OCA back adhesive is 20-100 μm, preferably 50 μm.
Example 2:
the embodiment 2 of the utility model provides a liquid crystal blackboard, include the utility model discloses embodiment 1 the membrane structure.
Example 3:
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A film structure characterized by:
the method comprises the following steps: the liquid crystal display panel comprises a first conductive layer, a first insulating layer, a liquid crystal layer, a second insulating layer and a second conductive layer which are sequentially stacked;
one side that first conducting layer kept away from first insulating layer is equipped with the AG coating, and one side that second conducting layer kept away from the second insulating layer is equipped with the OCA gum, is fixed with a plurality of spacers in the second insulating layer.
2. The film structure of claim 1, wherein:
the spacers are uniformly distributed in the second insulating layer.
3. The film structure of claim 2, wherein:
the spacing between each adjacent spacer is the same,
or,
the shape and size of each spacer are the same.
4. The film structure of claim 1, wherein:
the portions of the spacers in the liquid crystal layer are the same size.
5. The film structure of claim 1, wherein:
the thickness of the first insulating layer and/or the second insulating layer is 0.7-2 μm.
6. The film structure of claim 1, wherein:
the particle size of the spacer is 1.5-5 μm.
7. The film structure of claim 1, wherein:
the thickness of the OCA gum is 20-100 μm.
8. A liquid crystal blackboard, its characterized in that: comprising the membrane structure of any one of claims 1-7.
9. A liquid crystal writing board comprising the film structure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276473.4U CN214311193U (en) | 2020-12-29 | 2020-12-29 | Membrane structure, liquid crystal blackboard and liquid crystal writing board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276473.4U CN214311193U (en) | 2020-12-29 | 2020-12-29 | Membrane structure, liquid crystal blackboard and liquid crystal writing board |
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| Publication Number | Publication Date |
|---|---|
| CN214311193U true CN214311193U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023276473.4U Active CN214311193U (en) | 2020-12-29 | 2020-12-29 | Membrane structure, liquid crystal blackboard and liquid crystal writing board |
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| CN (1) | CN214311193U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268146A (en) * | 2022-07-06 | 2022-11-01 | 山东蓝贝思特教装集团股份有限公司 | Bistable liquid crystal writing device based on high-temperature-resistant hard substrate |
-
2020
- 2020-12-29 CN CN202023276473.4U patent/CN214311193U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268146A (en) * | 2022-07-06 | 2022-11-01 | 山东蓝贝思特教装集团股份有限公司 | Bistable liquid crystal writing device based on high-temperature-resistant hard substrate |
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