CN214669959U

CN214669959U - Prevent membrane of adjusting luminance of electric breakdown

Info

Publication number: CN214669959U
Application number: CN202121891068.5U
Authority: CN
Inventors: 宋永进
Original assignee: Shenzhen Kangsheng Photoelectric Technology Co ltd
Current assignee: Shenzhen Kangsheng Photoelectric Technology Co ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-11-09
Anticipated expiration: 2031-08-12

Abstract

The utility model relates to a light modulation film for preventing electric breakdown, which consists of a first substrate layer, a first conducting layer, a protective layer, a first polyimide coating, a polymer dispersed liquid crystal layer, a second polyimide coating, a second conducting layer and a second substrate layer which are sequentially stacked; the protective layer is a zirconium dioxide layer. The light adjusting film can prevent the polymer dispersed liquid crystal layer from being electrically punctured when an electric field is applied, and the service life of the light adjusting film is prolonged.

Description

Prevent membrane of adjusting luminance of electric breakdown

Technical Field

The utility model relates to a membrane technical field, concretely relates to prevent membrane of adjusting luminance of electric breakdown.

Background

The Polymer Dispersed Liquid Crystal (PDLC) dimming film is a film which is converted into a transparent state and an opaque state by utilizing the orientation change of liquid crystal under an electric field, is mainly used for dimming building and automobile glass, and can play a role in energy conservation and emission reduction. A Polymer Dispersed Liquid Crystal (PDLC) light adjusting film includes a polymer dispersed liquid crystal layer sandwiched between two conductive films. Along with the development of the light adjusting film technology, the light and thin polymer dispersed liquid crystal light adjusting film is an important development direction at present, so the whole thickness of the polymer dispersed liquid crystal light adjusting film needs to be reduced, the thickness of the polymer dispersed liquid crystal layer needs to be reduced accordingly, the distance between two conducting layers is reduced, electric breakdown is easy to occur between the two conducting layers, especially, a conducting film has tiny conducting particles on the surface when being prepared, short circuit and electric breakdown are easily caused, a small black point of the electric breakdown can occur in the use process of the light adjusting film, and the use of the light adjusting film is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prevent membrane of adjusting luminance of electric breakdown, this membrane of adjusting luminance can prevent that polymer dispersed liquid crystal layer is by electric breakdown when applying the electric field, improves the life of membrane of adjusting luminance.

In order to achieve the purpose of the utility model, the utility model provides a light modulation film for preventing electric breakdown, which consists of a first substrate layer, a first conducting layer, a protective layer, a first polyimide coating, a polymer dispersed liquid crystal layer, a second polyimide coating, a second conducting layer and a second substrate layer which are stacked in sequence; the protective layer is a zirconium dioxide layer.

The further technical scheme is that the thickness of the protective layer is 5-20 nm.

The further technical scheme is that the thickness of the first polyimide coating and the thickness of the second polyimide coating are respectively 20-50 nm.

The further technical scheme is that the first substrate layer and the second substrate layer are respectively selected from polyester or polycarbonate.

The further technical scheme is that the first conducting layer and the second conducting layer are respectively selected from at least one of an ITO conducting layer, a ZTO conducting layer and a nano silver wire conducting layer.

The further technical scheme is that a first surface of the first polyimide coating layer, which is far away from the protective layer, and a second surface of the second polyimide coating layer, which is far away from the second conductive layer, are respectively subjected to friction.

The further technical scheme is that the thickness of the first base material layer and the thickness of the second base material layer are respectively 10-30 μm.

The further technical scheme is that the first conducting layer is plated on the first base material layer, and the second conducting layer is plated on the second base material layer.

The further technical scheme is that the protective layer is plated on the first conductive layer.

The further technical scheme is that the first polyimide coating is coated on the protective layer, and the second polyimide coating is coated on the second conductive layer.

Compared with the prior art, the utility model discloses can gain following beneficial effect:

the utility model discloses a prevent membrane of adjusting luminance of electric breakdown has attached a zirconium dioxide protective layer on one of them conducting layer, and the zirconium dioxide protective layer can the separation between two conducting layers, plays the effect that prevents the short circuit and prevent electric breakdown, and the zirconium dioxide protective layer has good light transmittance moreover, does not influence the light transmission performance of membrane of adjusting luminance. Furthermore, the utility model discloses still adopted the polyimide coating on the relative surface of two conducting layers, the polyimide coating can further cover the conducting layer, prevents short circuit and electric breakdown, and polyimide itself has lower dielectric constant, and is few to the influence of electric field. In addition, the polyimide may also serve as an alignment function for polymer dispersed liquid crystals.

Drawings

Fig. 1 is a schematic structural view of the embodiment of the light modulation film for preventing electric breakdown of the present invention. In the figure, 1 is a first base material layer, 2 is a first conductive layer, 3 is a protective layer, 4 is a first polyimide coating layer, 5 is a polymer dispersed liquid crystal layer, 6 is a second polyimide coating layer, 7 is a second conductive layer, and 8 is a second base material layer.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Detailed Description

As shown in fig. 1, the present embodiment provides an electric breakdown prevention light modulation film, which is characterized by comprising a first substrate layer 1, a first conductive layer 2, a protective layer 3, a first polyimide coating layer 4, a polymer dispersed liquid crystal layer 5, a second polyimide coating layer 6, a second conductive layer 7, and a second substrate layer 8, which are sequentially stacked.

The protective layer 3 is a zirconium dioxide layer, which has good stability and insulation and can densely cover the first conductive layer 2. The first polyimide coating 4 and the second polyimide coating 6 can also function to cover and improve the resistance to electrical breakdown. The protective layer 3, the first polyimide coating 4 and the second polyimide coating 6 are matched with the corresponding first conducting layer 2 and the second conducting layer 7 and then clamp the polymer dispersed liquid crystal layer 5, the polymer dispersed liquid crystal layer 5 is effectively isolated between the polymer dispersed liquid crystal layer 5 and the first conducting layer 2 and the second conducting layer 7, the polymer dispersed liquid crystal layer is prevented from being easily subjected to electrical breakdown, conductive particles which are easily left on the first conducting layer 2 and the second conducting layer 7 are covered or removed through the arrangement, and the polymer dispersed liquid crystal layer is prevented from being easily subjected to electrical breakdown due to short circuit. Moreover, through the matching of the protective layer 3 and the polyimide coating, the protective layer 3 is arranged on one of the conductive layers to play a good electric breakdown prevention role, and the protective layers are not required to be arranged on the two conductive layers respectively, so that the using amount of zirconium dioxide is reduced, and the cost is reduced.

Preferably, the thickness of the protective layer 3 is 5-20 nm, and when the protective layer 3 is in the thickness range, the electric breakdown can be prevented in the common voltage range of the light modulation film of not less than 12V, and the protective layer 3 is prevented from influencing the optical performance of the whole light modulation film.

Preferably, the thickness of the first polyimide coating 4 and the thickness of the second polyimide coating 6 are respectively 20 to 50nm, so that the electric breakdown prevention performance can be ensured, and the thickness of the whole film is not excessively increased.

Preferably, the first substrate layer 1 and the second substrate layer 8 are respectively selected from polyester or polycarbonate, and these flexible plastics with high light transmittance are selected as substrates, so that the light modulation film can be conveniently applied to products such as windows and the like by means of pasting.

Preferably, the first conductive layer 2 and the second conductive layer 7 are respectively selected from at least one of ito conductive layer, ZTO conductive layer, and silver nanowire conductive layer, and these conductive layers have good conductivity and transparency, and are suitable for use in a dimming film.

Preferably, a first surface of the first polyimide coating 4 away from the protective layer 3 and a second surface of the second polyimide coating 6 away from the second conductive layer 7 are respectively rubbed to form a surface structure capable of inducing liquid crystal orientation, and the surfaces of the first polyimide coating 4 and the second polyimide coating 6 can also perform an alignment function on liquid crystals.

Preferably, the thickness of the first substrate layer 1 and the thickness of the second substrate layer 8 are 10 μm to 30 μm, respectively, to provide sufficient strength, and not to increase the thickness of the film as a whole too much.

Preferably, the first conductive layer 2 is plated on the first substrate layer 1, and the protective layer 3 is plated on the first conductive layer 2, for example, the first conductive layer 2 and the protective layer 3 are sequentially formed on the first substrate layer 1 by magnetron sputtering using a target, and the target can be replaced to realize continuous coating. Similarly, the second conductive layer 7 may be plated on the second substrate layer 8 by magnetron sputtering. Then, by a coating method, the first polyimide coating 4 is coated on the protective layer 3, the second polyimide coating 6 is coated on the second conductive layer 7, so as to obtain two conductive films, and the conductive films are sandwiched by the polymer dispersed liquid crystal layer 5 by roll-to-roll and other processes, so as to obtain the light modulation film capable of preventing electric breakdown.

Finally, it should be emphasized that the above-described embodiments are merely preferred embodiments of the present invention, and are not intended to limit the present invention. 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

1. A light modulation film for preventing electric breakdown is characterized by consisting of a first base material layer, a first conducting layer, a protective layer, a first polyimide coating, a polymer dispersed liquid crystal layer, a second polyimide coating, a second conducting layer and a second base material layer which are sequentially laminated; the protective layer is a zirconium dioxide layer.

2. The light adjusting film for preventing electric breakdown as claimed in claim 1, wherein the thickness of the protective layer is 5 to 20 nm.

3. A switchable film preventing electrical breakdown as claimed in claim 1 or 2, characterized in that the thickness of the first polyimide coating and the thickness of the second polyimide coating are 20 to 50nm, respectively.

4. A switchable film preventing electrical breakdown as claimed in claim 1 or 2, characterized in that the first substrate layer and the second substrate layer are each selected from polyester or polycarbonate.

5. A light adjusting film for preventing electric breakdown as defined in claim 1 or 2, wherein said first conductive layer and said second conductive layer are each selected from at least one of an ITO conductive layer, a ZTO conductive layer, and a silver nanowire conductive layer.

6. A switchable film preventing electrical breakdown as claimed in claim 1 or 2, characterized in that a first surface of the first polyimide coating layer facing away from the protective layer and a second surface of the second polyimide coating layer facing away from the second conductive layer are rubbed, respectively.

7. A switchable film preventing electrical breakdown as claimed in claim 1 or 2, characterized in that the thickness of the first substrate layer and the thickness of the second substrate layer are 10 μm to 30 μm, respectively.

8. A light regulating film for preventing electric breakdown as claimed in claim 1 or 2, characterized in that said first conductive layer is plated on said first substrate layer and said second conductive layer is plated on said second substrate layer.

9. A switchable light film that is resistant to electrical breakdown as claimed in claim 1 or 2, characterized in that the protective layer is plated on the first conductive layer.

10. A switchable film preventing electrical breakdown as claimed in claim 1 or 2, characterized in that said first polyimide coating is applied on said protective layer and said second polyimide coating is applied on said second conductive layer.