CN209914405U

CN209914405U - Shielding film

Info

Publication number: CN209914405U
Application number: CN201920535638.3U
Authority: CN
Inventors: 张晟; 周菲
Original assignee: Upgrade Photoelectric (kunshan) Co Ltd
Current assignee: Upgrade Photoelectric (kunshan) Co Ltd; Shine Optoelectronics Kunshan Co Ltd
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-01-07
Anticipated expiration: 2029-04-19

Abstract

The utility model discloses a shielding film, it includes transparent bearer layer and electrically conductive net. The transparent bearing layer comprises a first side surface and a second side surface which are oppositely arranged, the first side surface is concavely provided with grooves, and the grooves are mutually communicated in a grid shape; filling a conductive material in the groove to form the conductive grid, wherein the conductive grid comprises a plurality of circular grids and/or a plurality of oval grids; the conductive grids are distributed in a coordinate with an X axis and a Y axis, wherein the difference between the sheet resistance of the conductive grids distributed along the X axis direction and the sheet resistance of the conductive grids distributed along the Y axis direction is not more than 5%; the width of the grid lines of the conductive grid ranges from 2 to 10 mu m, and the width of the circular grids or the oval grids ranges from 50 to 500 mu m. Conductive material is filled in the grooves to form conductive grids, the conductive grids comprise a plurality of circular grids or a plurality of oval grids, and the displayed dot patterns are soft, so that the visual influence caused by interference is reduced.

Description

Shielding film

Technical Field

The present invention relates to electronics, and more particularly, to a shielding film.

Background

In recent years, with the rapid development of information-oriented society, electronic devices related to information are rapidly developed, and the electromagnetic shielding requirements for aerospace devices, advanced optical instruments, communication devices, and medical diagnostic instruments are increasing, and it is mainly required to have strong electromagnetic shielding capability and reduce the visual images as much as possible. At present, the electromagnetic shielding of electronic equipment mainly adopts a shielding film, and a conductive grid adopted by the existing shielding film has serious interference on light and the definition of image vision.

In view of this, the present invention solves the existing technical problems by improving the shielding film.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a shielding film to solve the above technical problems.

The utility model discloses a technical scheme is:

a shielding film, comprising:

the transparent bearing layer comprises a first side surface and a second side surface which are oppositely arranged, the first side surface is concavely provided with grooves, and the grooves are in a mutually communicated grid shape;

the groove is filled with a conductive material to form the conductive grid, and the conductive grid comprises a plurality of circular grids and/or a plurality of oval grids;

wherein the conductive grids are distributed in coordinates having an X-axis and a Y-axis, wherein the difference between the sheet resistance of the conductive grids distributed along the X-axis direction and the sheet resistance of the conductive grids distributed along the Y-axis direction is not more than 5%;

the width of the grid lines of the conductive grid ranges from 1 to 15 micrometers, and the width of the circular grids or the oval grids ranges from 50 to 500 micrometers.

In one embodiment, the width of the circular grids or the oval grids is d, wherein d is more than or equal to 100 and less than or equal to 300.

In one embodiment, the conductive mesh comprises a plurality of circular grids arranged in a regular triangle, a regular quadrangle or a regular hexagon.

In one embodiment, the regular triangles, the regular quadrilaterals or the regular hexagons are arranged in a common side.

In one embodiment, the circle center of the circular grid coincides with the vertex of a regular triangle, a regular quadrangle or a regular hexagon.

In one embodiment, the circular grids are connected through a circumscribed connection or a linear grid line.

In one embodiment, the conductive grid comprises a plurality of oval-shaped cells, the oval-shaped cells comprise a first oval-shaped cell and a second oval-shaped cell, and the width of the first oval-shaped cell is greater than the width of the second oval-shaped cell.

In one embodiment, the first oval lattices and the second oval lattices are alternately arranged in the same row and the same column, the first oval lattices and the second oval lattices in the same row are connected in an incisal manner, and the first oval lattices and the second oval lattices in the same column are connected by linear grid lines.

In one embodiment, the first oval cells and the second oval cells are alternately arranged in the same row and the same column, the first oval cells and the second oval cells in the same row are connected in an circumscribed manner, and the first oval cells and the second oval cells in the same column are connected in a circumscribed manner.

In one embodiment, the cross section of the groove is rectangular or inverted trapezoid, and the depth h of the groove is greater than or equal to 2 μm and less than or equal to 8 μm.

The utility model has the advantages that: the conductive grid comprises a plurality of circular grids or a plurality of oval grids, and the displayed dot patterns are softer, so that the visual influence caused by interference is reduced.

Drawings

Fig. 1 is a schematic plan view of a shielding film of the present invention;

fig. 2 is a schematic cross-sectional view of the shielding film of the present invention;

fig. 3 is another schematic cross-sectional view of the shielding film of the present invention;

fig. 4 is another schematic cross-sectional view of the shielding film of the present invention;

fig. 5 is another schematic cross-sectional view of the shielding film of the present invention;

fig. 6 is another schematic plan view of the shielding film of the present invention;

fig. 7 is another schematic plan view of the shielding film of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model discloses a shielding film, it includes transparent bearer layer and electrically conductive net. The transparent bearing layer comprises a first side surface and a second side surface which are oppositely arranged, the first side surface is concavely provided with grooves, and the grooves are mutually communicated in a grid shape; filling a conductive material in the groove to form the conductive grid, wherein the conductive grid comprises a plurality of circular grids and/or a plurality of oval grids; the conductive grids are distributed in a coordinate with an X axis and a Y axis, wherein the difference between the sheet resistance of the conductive grids distributed along the X axis direction and the sheet resistance of the conductive grids distributed along the Y axis direction is not more than 5%; the width of the grid lines of the conductive grid ranges from 1 to 15 mu m, and the width of the circular grids or the oval grids ranges from 50 to 500 mu m. The shielding film can present softer point lines, and the interference is slight, so that visual images caused by the interference are reduced, and the shielding film is more visually cleaned. Moreover, the conductive mesh is formed by filling the trench, and the shape of the conductive mesh is realized by the extended shape of the trench, and the conductive performance is excellent.

Furthermore, the width of the circular grids or the oval grids is d, wherein d is more than or equal to 100 and less than or equal to 300.

In one embodiment, the conductive mesh comprises a plurality of circular cells arranged in regular triangles, regular quadrilaterals or regular hexagons. Preferably, the regular triangles, the regular quadrilaterals or the regular hexagons are arranged in a common side. Furthermore, the circle center of the circular grid is superposed with the vertex of the regular triangle, the regular quadrangle or the regular hexagon. The circular grids are connected through circumscribed connection or through linear grid lines.

The radius sizes of the plurality of circular grids are one or more, namely, the circles of the net-shaped grids can be the same in size or can be different in size. For example, the inner sizes of the same row are arranged at intervals, and the inner sizes of the same column are also arranged at intervals.

In another embodiment, the conductive grid comprises a plurality of oval shaped cells comprising a first oval shaped cell and a second oval shaped cell, the first oval shaped cell having a width greater than a width of the second oval shaped cell. The first oval lattices and the second oval lattices are alternately arranged in the same row and the same column, the first oval lattices and the second oval lattices in the same row are connected in an outcut manner, and the first oval lattices and the second oval lattices in the same column are connected through linear grid lines.

For example, the first oval cells and the second oval cells are alternately arranged in the same row and the same column, the first oval cells and the second oval cells in the same row are connected in an circumscribed manner, and the first oval cells and the second oval cells in the same column are connected in an circumscribed manner.

The cross section of the groove is rectangular or inverted trapezoidal, and the depth h of the groove is not less than 2 mu m and not more than 8 mu m.

Hereinafter, the shielding film of the present invention will be described by way of example with reference to the drawings.

Referring to fig. 1 and 2, the shielding film 100 includes a transparent carrier layer 1 and a conductive mesh 2. The transparent bearing layer 1 comprises a first side surface 11 and a second side surface 12 which are oppositely arranged, and a groove 13 is concavely arranged on the first side surface 11. The grooves 13 are in a mutually connected grid shape, and the grooves 13 are filled with a conductive material to form the conductive grid 2. The conductive grid 2 comprises a plurality of circular grids 21, the circular grids 21 have the same radius, the circle centers are distributed according to the regular hexagon honeycomb shape, adjacent circular grids 21 are externally tangent and connected, the circular grids 21 and the tangent parts are all arranged in the grooves 13, and the circular grids 21 are not internally tangent, internally sleeved and overlapped.

The cross sections of the grooves 13 are all rectangular, the depths h of the grooves are the same, the value range of h is 2-8 mu m, the widths w of the grid lines of the circular grids 21 are uniformly arranged, the value range of w is 1-15 mu m, and the widths w of the grid lines at the tangent positions are slightly wider by 0.5-1 mu m. The diameter d of the circular grid 21 ranges from 100-. In other embodiments, the circular grid 21 gridlines may differ in shape or size.

The filled conductive material can be one or the combination of more than two of metal conductive material, compound conductive material or organic conductive material; metals such as silver, gold, copper, iron, nickel, aluminum, etc.; compounds such as ITO; the organic conductive material is PEDOT, for example.

Referring to fig. 1, if the conductive grid is placed in the coordinate axis, the total length of the conductive grid distributed along the X-axis direction is equal to the total length of the conductive grid distributed along the Y-axis direction, the difference between the sheet resistance of the conductive grid distributed along the X-axis direction and the sheet resistance of the conductive grid distributed along the Y-axis direction is not more than 5%, and the conductive grid is uniformly distributed as a whole.

The shielding film 100 may be formed by coating a UV glue layer, imprinting the UV glue layer, curing to form the transparent carrier layer 1 having the interconnected grooves 13, and filling the grooves 13 with a conductive material to form the conductive mesh 2. The conductive grid 2 comprises a plurality of circular grids 21, and the circular grids 21 are the same in size and distributed in a regular hexagonal honeycomb shape.

The conductive grid 2 of the shielding film 100 includes a plurality of circular lattices 21 arranged in a honeycomb manner, and the dot patterns of the plurality of circular lattices 21 are softer and only slightly interfere with each other, so that the visual influence caused by the interference is reduced, and the vision is clearer. The conductive mesh 2 is formed by filling the trenches 13, and the shape of the conductive mesh 2 is realized by the shape of the trenches 13, and the conductive performance is excellent.

Referring to fig. 3, the shielding film 100 further includes a substrate layer 3, and the substrate layer 3 may be a single-layer structure or a composite-layer structure. For example, the substrate layer 3 is PET, PE, PC, PMMA, glass, or a composite plate. The transparent carrier layer 1 may be bonded to the substrate layer 3 by a bonding material, or may be directly formed on the substrate layer 3, for example, a UV glue layer is coated on PET.

Referring to fig. 1, the cross-sectional shape of the trench 13 may be rectangular. In other embodiments, the grooves 14 may also be reversed trapezoids, and referring to fig. 4, the reversed trapezoids may be provided to facilitate demolding after the mold impresses the grooves.

The conductive material may not fill the trench 13, or may just fill the trench 15, see fig. 5. Of course, in other embodiments, the conductive material may also overflow the trench. The conductive material may be one layer or two or more layers in the trench.

Referring to fig. 6, the conductive mesh 5 of the shielding film 200 includes a plurality of first oval-shaped cells 51 and a plurality of second oval-shaped cells 52. The length of the major axis of the first oval lattice 51 is greater than that of the second oval lattice 52, the first oval lattice 51 and the second oval lattice 52 are arranged at intervals in the same row, and the adjacent first oval lattice 51 and the second oval lattice 52 are externally tangent and connected; the second oval lattices 52 and the first oval lattices 51 in the adjacent rows are arranged at intervals, namely in the same column, the first oval lattices 51 and the second oval lattices 52 are also arranged at intervals; the two adjacent rows are connected by linear grid lines 53.

In the present embodiment, the first elliptical lattice 51 and the second elliptical lattice 52 in the upper and lower rows are connected by the linear grid lines 53; in other embodiments, the linear grid lines 53 are arranged at intervals, that is, a group of the first oval lattices 51 and the second oval lattices 52 arranged in an upper row and a lower row are connected by the linear grid lines 53, the first oval lattices 51 and the second oval lattices 52 of adjacent groups are vacant and not connected, the first oval lattices 51 and the second oval lattices 52 of the third group are connected by the linear grid lines 53, and so on; or the first oval lattices 51 and the second oval lattices 51 of the two adjacent rows are connected, and the first oval lattices 52 and the second oval lattices 52 are connected; or the oval lattices in two adjacent rows are randomly connected through linear grid lines of straight lines, curved lines and broken lines, the interference is slight, and the vision is clear.

In the X-axis and Y-axis coordinates, the difference value between the square resistance of the guide grid in the X-axis direction and the square resistance of the guide grid in the Y-axis direction is not more than 5%, namely the difference value is basically equal, the conductive grids are uniformly distributed, and the conductive performance is stable.

Referring to fig. 7, the conductive mesh 6 of the shielding film 300 includes a plurality of first oval-shaped cells 61 and a plurality of second oval-shaped cells 62. The first oval lattices 71 and the second oval lattices 72 with different sizes are arranged in a spaced array, and the first oval lattices 71 and the second oval lattices 72 are connected with each other through circumscribed.

The conductive grids of the shielding film comprise circular grids, oval grids or quasi-circular grids, the oval grids or quasi-circular grids are mutually connected through circumscribed or linear grid lines, the circular grids, the oval grids or quasi-circular grids are mutually connected through circumscribed or linear grid lines, no inscribing or overlapping exists, the interference is slight, and the vision is clear; and the conductive grid lines are all arranged in the grooves, so that the conductivity is stable.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail with reference to the accompanying drawings. In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the invention. Moreover, the technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A shielding film, comprising:

2. The shielding film of claim 1, wherein the circular or elliptical cells have a width d, wherein d is 100. ltoreq. d.ltoreq.300.

3. The shielding film of claim 2, wherein the conductive mesh comprises a plurality of circular lattices arranged in a regular triangle, a regular quadrangle or a regular hexagon.

4. The shielding film of claim 3, wherein the regular triangles, regular quadrilaterals or regular hexagons are arranged in a common side.

5. The shielding film of claim 3, wherein the circle center of the circular lattice coincides with the vertex of a regular triangle, a regular quadrangle, or a regular hexagon.

6. The shielding film of claim 3, 4 or 5, wherein the circular lattices are connected by circumscribed connections or by linear lattice lines.

7. The shielding film of claim 2, wherein the conductive mesh comprises a plurality of oval shaped cells, the plurality of oval shaped cells comprising a first oval shaped cell and a second oval shaped cell, the first oval shaped cell having a width greater than a width of the second oval shaped cell.

8. The shielding film of claim 7, wherein the first and second elliptical cells are alternately arranged in the same row and the same column, the first and second elliptical cells in the same row are tangentially connected, and the first and second elliptical cells in the same column are connected by linear grid lines.

9. The shielding film of claim 7, wherein the first elliptical cells and the second elliptical cells are alternately arranged in the same row and the same column, the first elliptical cells and the second elliptical cells in the same row are connected in an incised manner, and the first elliptical cells and the second elliptical cells in the same column are connected in an incised manner.

10. The shielding film of claim 1, wherein the cross-sectional shape of the trench is rectangular or inverted trapezoidal, and the depth h of the trench is 2 μm or less and 8 μm or less.