CN115453674A - Peep-proof film - Google Patents
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- CN115453674A CN115453674A CN202211003420.6A CN202211003420A CN115453674A CN 115453674 A CN115453674 A CN 115453674A CN 202211003420 A CN202211003420 A CN 202211003420A CN 115453674 A CN115453674 A CN 115453674A
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- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 19
- 239000012528 membrane Substances 0.000 abstract description 11
- 239000010408 film Substances 0.000 description 35
- 238000002834 transmittance Methods 0.000 description 11
- 238000010146 3D printing Methods 0.000 description 10
- 239000003292 glue Substances 0.000 description 7
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- 229920001875 Ebonite Polymers 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 3
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- 239000005341 toughened glass Substances 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1866—Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Theoretical Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
A privacy film comprising a support layer 1, and a light-transmitting layer 2 and a light-shielding layer 3 provided on one side surface of the support layer 1, wherein the light-shielding layer 3 comprises a plurality of light-shielding units 31 arranged substantially in a first direction and extending substantially in a second direction; the light shielding unit 31 has a curved structure which fluctuates along a second direction; the distance between any adjacent wave crests and wave troughs of the shading unit 31 in the first direction is the transverse width W of the shading unit 31, and the distance between any two adjacent wave crests of the shading unit 31 in the second direction is L; the transverse width W is 0.5-10 μm, and the distance L between any two adjacent peaks of the light-shielding unit 31 in the second direction is 1-1000 μm. This application peep-proof membrane is obviously superior to among the prior art peep-proof membrane of linear structure in peep-proof effect and luminousness angle, and the interference line that appears in the reduction peep-proof membrane use that can show has realized the good interference effect of separating.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a peep-proof film.
Background
At present, a layer of peep-proof film is added on a display panel, and other people in a large visual angle direction cannot see a display picture. The preparation scheme of the peep-proof membrane in the current market is mainly as follows: mold processing → printing and curing of the transparent glue structure → filling and curing of the black peep-proof glue, which is limited by the following limitations: the existing peep-proof membrane structure is processed and transferred by a mould and is limited by the processing difficulty of the mould, the existing peep-proof membrane structure is an equal-height and straight grating structure, the heights of single gratings are the same, the intervals among the gratings are the same, and when light penetrates out of the structure layer, bad optical effects such as molar interference and the like are easy to generate. In order to know interference, the traditional peep-proof film usually adopts a rotating angle mode, or a mode that a supporting surface is subjected to matte treatment, toughened glass is subjected to matte treatment, and the like; the cutting loss of the material can be increased by processing the corners, and the difference of the degrees of the corners is larger on the displays with different sizes or resolutions, so that the universality is greatly reduced; and adopt holding surface or toughened glass to do the matte and handle, can increase the flash point when reducing the peep-proof effect unusual, lead to user experience to feel relatively poor. In the production process of the traditional peep-proof film, the structure is solidified and transferred, the influence of the problem of difficult structural demoulding is caused, the product yield is not high, the mould scrapping probability is also high, the requirement on glue is higher, and otherwise the expected effect cannot be achieved.
Therefore, a peep-proof membrane is urgently needed to solve the above problems.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the peep-proof membrane, and the peep-proof structure is set to be a transversely-shaking curve structure, so that the bad problems in the prior art are solved.
The technical problem to be solved by the invention is realized by the following technical scheme:
a peep-proof film comprises a supporting layer, a light transmitting layer and a shading layer, wherein the light transmitting layer and the shading layer are arranged on one side surface of the supporting layer; the first direction and the second direction are mutually vertical and are parallel to the surface of the supporting layer;
the shading unit is of a curve structure fluctuating along a second direction; the distance between any adjacent wave crests and wave troughs of the shading unit in the first direction is the transverse width W of the shading unit, and the distance between any two adjacent wave crests of the shading unit in the second direction is L; the transverse width W is 0.5-10 μm, and the distance L between any two adjacent peaks of the shading unit in the second direction is 1-1000 μm.
Further, the lateral widths W of the light shielding units are the same or different, preferably, the lateral widths W of the light shielding units are different.
Further, a distance between any two adjacent wave peaks of the light shielding unit in the second direction is L, and the distances L between any two adjacent wave peaks of the light shielding unit in the second direction are the same or different, and preferably, the distances L between any two adjacent wave peaks of the light shielding unit in the second direction are different.
Further, the distance between any point on the light shielding units and the adjacent light shielding units in the first direction is the distance S between the light shielding units, and the distance S between the light shielding units is greater than 0.
Further, the distances S between the light shielding units are the same or different, and preferably, the distances S between the light shielding units are different.
Further, the distance S between the light shielding units is 20-60 μm, and preferably the distance S between the light shielding units is 25-40 μm.
Further, the height Ha of the light shielding unit is 1-1000 μm, and the height Hb of the light transmitting unit is 1-1000 μm.
Furthermore, the thickness Wa of the shading units is 5-25 μm, the euphotic layer is composed of a plurality of euphotic units which are complementary with the shading units, and the thickness of the euphotic units is consistent with the distance S between the shading units.
The invention overcomes the mold processing barriers of the existing peep-proof film by the 3D printing technology, can accurately control the shape, arrangement mode and structure height of the peep-proof film by using the method for printing the peep-proof structure by 3D, realizes product upgrading, and has strong practicability and application prospect. The peep-proof structure is set to be a transversely-jittered curve structure, so that the interference-free effect is realized, theoretically, the height of the grating structure can be processed to be different from 1 mu m to 1000 mu m, and the width of the grating structure can be processed to be different from 1 mu m to 1000 mu m, so that the defects of incapability of demoulding the structure, deformation of a mold structure and the like are not needed to be worried about. The peep-proof film processed by the invention can realize the display effect without interference, the transmittance and the peep-proof angle are not affected, the cutting loss of the finished product is overcome, and the product process is simplified.
Drawings
FIG. 1 is a top view of the privacy film in one embodiment;
FIG. 2 is a partial schematic view of the area B in FIG. 1;
FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A' of FIG. 1;
fig. 4, a top view of the privacy film in another embodiment.
1. A support layer; 2. a light transmitting layer; 3. a light-shielding layer; 31. a light shielding unit; x, a first direction; y, a second direction.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application 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 according to the present application. 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.
The present invention will be described in detail below with reference to the drawings and examples.
A privacy film comprising a support layer 1, and a light-transmitting layer 2 and a light-shielding layer 3 provided on one side surface of the support layer 1, wherein the light-shielding layer 3 comprises a plurality of light-shielding units 31 arranged substantially in a first direction and extending substantially in a second direction; the first direction and the second direction are both parallel to the surface of the support layer 1 and are perpendicular to each other;
the shading unit 31 has a wave-shaped curve structure which fluctuates along a second direction, and specifically, the wave-shaped curve structure fluctuates left and right along the second direction; the distance between any adjacent wave crests and wave troughs of the light shielding unit 31 in the first direction is the transverse width W of the light shielding unit 31, and the distance between any two adjacent wave crests of the light shielding unit 31 in the second direction is L; the transverse width W is 0.5-10 μm, and the distance L between any two adjacent peaks of the light shielding unit 31 in the second direction is 1-1000 μm.
Specifically, as shown in fig. 1 to 3, the privacy film at least includes a supporting layer 1, a light-transmitting layer 2 and a light-shielding layer 3 are disposed on one surface of the supporting layer 1, and the light-transmitting layer 2 and the light-shielding layer 3 are located on the same surface and are mutually embedded to form a complete thin film structure. The shading layer 3 comprises a plurality of shading units 31 which are basically arranged along a first direction and basically extend along a second direction; the first direction and the second direction are both parallel to the surface of the supporting layer 1 on which the light-transmitting layer 2 and the light-shielding layer 3 are disposed, and the first direction and the second direction are perpendicular to each other, the first direction is shown as an X direction in fig. 1 to 4, and the second direction is shown as a Y direction.
As shown in fig. 1, the appearance of the shading units 31 is a wave-shaped curved structure, and the shading units 31 are wavy along the second direction, that is, a single shading unit 31 has a plurality of wave peak and trough structures protruding and sinking along the first direction on a plane parallel to the supporting layer 1, and the wave peak and trough structures are repeated in sequence and extend along the second direction to form the shading units 31 with the wave-shaped curved structure. The plurality of light-shielding units 31 are sequentially arranged in a first direction to form the light-shielding layer 3. It should be noted here that the "substantially aligned in the first direction" and "extending substantially in the second direction" indicate a range of tolerance to error, that is, the light shielding units 31 are not necessarily aligned strictly in the first direction, and are arranged extending strictly in the second direction. For example, the light shielding units 31 may be arranged strictly in the first direction and extend strictly in the second direction; although there may be a slight deviation from the first direction and a slight deviation from the second direction, the "substantially aligned in the first direction" and "substantially extending in the second direction" still appear macroscopically, which is acceptable from the viewpoint of product performance, and it is also completely reasonable that there is a certain range of deviation in product structure due to problems in manufacturing process and the like.
Compared with the existing peep-proof film with a linear structure, the peep-proof film with the wavy curve structure can solve the problem of molar interference in the using process of the peep-proof film, and has a good interference relieving effect. Meanwhile, the shading unit 31 is of a wave-shaped curve structure which fluctuates left and right along the second direction, compared with a wave-shaped curve structure which fluctuates up and down, the appearance of a finished product is free of color difference abnormality, the manufacturing process is more friendly, and demolding of the shading unit 31 and complete filling of the transmission unit 21 are facilitated. It should be noted here that the light shielding unit 31 undulates left and right along the second direction, which means that the directions of the peaks and valleys of the light shielding unit 31 are both the first direction; the light shielding units 31 fluctuate up and down along the second direction, which means that the directions of the peaks, the valleys, the protrusions and the depressions of the light shielding units 31 are all vertical to the surface of the support layer 1.
As shown in fig. 2, the distance between any adjacent peaks and troughs of the light shielding unit 31 in the first direction is the transverse width W of the light shielding unit 31, and the distance between any two adjacent peaks of the light shielding unit 31 in the second direction is L; the transverse width W is 0.5-10 μm, the distance L between any two adjacent peaks of the light shielding unit 31 in the second direction is 1-1000 μm, and preferably, the ratio of L/W is not less than 25, in order to further improve the interference resolution effect of the privacy film, preferably, the distance L between any two adjacent peaks of the light shielding unit 31 in the second direction is 800-1000 μm, and the transverse width W is 0.5-4 μm.
Further, the distance W in the first direction between any adjacent peaks and valleys of the light shielding units 31 is the same or different, and preferably, the distance W in the first direction between any adjacent peaks and valleys of the light shielding units 31 is different.
Specifically, the distances W in the first direction between any adjacent wave crests and wave troughs of the light shielding unit 31 may be the same, or may be different, as shown in fig. 1, when the distances W in the first direction between any adjacent wave crests and wave troughs of the light shielding unit 31 are the same, the amplitudes of the protrusions and the depressions of the light shielding unit 31 in the first direction are consistent and regular; as shown in fig. 4, when the distance W in the first direction between any adjacent wave crests and wave troughs of the light shielding unit 31 is different, the amplitudes of the protrusions and the depressions of the light shielding unit 31 in the first direction are not uniform and are irregular. Preferably, the distance W between any adjacent wave crests and wave troughs of the light shielding unit 31 in the first direction is different, and at this time, the amplitudes of the protrusions and the recesses of the light shielding unit 31 in the first direction are inconsistent and irregular, so that the molar interference is reduced due to the randomness of the structure, and the interference solution has an excellent interference solution effect.
Further, a distance between any two adjacent peaks of the light shielding unit 31 in the second direction is L, and distances L between any two adjacent peaks of the light shielding unit 31 in the second direction are the same or different, and preferably, distances L between any two adjacent peaks of the light shielding unit 31 in the second direction are different.
Specifically, as shown in fig. 2, a distance between any two adjacent peaks of the light shielding unit 31 in the second direction is L, it is conceivable that L may also be a distance between any two adjacent valleys in the second direction, and the distances L between any two adjacent peaks of the light shielding unit 31 in the second direction may be the same or different. Preferably, the distance L between any two adjacent peaks of the light shielding unit 31 in the second direction is different, that is, the extending distance of the light shielding unit 31 in the second direction is random and irregular, and due to the randomness of the structure, the molar interference is further reduced, and the interference solution effect is excellent.
Further, the distance between any one point of the light shielding units 31 and the adjacent light shielding unit 31 in the first direction is the spacing S between the light shielding units 31, and the spacing S between the light shielding units 31 is greater than 0.
Specifically, the distance between any one point of the light shielding units 31 and the adjacent light shielding unit 31 in the first direction is the spacing S between the light shielding units 31, the spacing S between the light shielding units 31 is greater than 0, the spacing S between the light shielding units 31 is 20 to 60 μm in order to ensure sufficient light transmittance and visibility of the privacy film, and the spacing S between the light shielding units 31 is preferably 25 to 40 μm in view of widening the privacy angle.
Note that, the distance between any point on the light shielding unit 31 and the adjacent light shielding unit 31 in the first direction is the spacing S between the light shielding units 31, which should be understood as follows: the distance between the light-shielding units 31 on the bottom side of the light-shielding units 31 parallel to the second direction and the adjacent light-shielding units 31 on the same side of the bottom side is measured, that is, as shown in fig. 3, the distance S between the light-shielding units 31 does not include the thickness of any light-shielding unit 31.
Further, the intervals S between the light shielding units 31 are the same or different, and preferably, the intervals S between the light shielding units 31 are different.
Specifically, the distances S between the light shielding units 31 may be the same or different, as shown in fig. 1-2, when the distances S between the light shielding units 31 are the same, the distances S between the light shielding units 31 are consistent and regular, that is, the thicknesses Wb of the light transmitting units are consistent; as shown in fig. 4, when the distances S between the light-shielding units 31 are different, the arrangement of the light-shielding units 31 in the first direction is non-equidistant and irregular. Preferably, the distances S between the light-shielding units 31 are different, and the light-shielding units 31 are arranged in the first direction in a non-equidistant and random manner, so that molar interference is reduced due to the randomness of the structure, and an excellent interference solution effect is achieved.
Further, the height Ha of the light shielding unit 31 is 1-1000 μm, and the height Hb of the light transmitting unit is 1-1000 μm.
Specifically, as shown in fig. 3, the vertical distance between the light-shielding units 31 and the surface of the support layer 1 is the height Ha of the light-shielding units 31, the height Ha of the light-shielding units 31 is 1-1000 μm, the peep-proof angle and the light transmittance of the peep-proof film are further increased, and the peep-proof effect is better. The height Hb of the light transmission unit is 1 to 1000 μm, preferably, the height Hb of the light transmission unit is consistent with the height Ha of the shading unit 31, and considering that the structure of the shading layer 3 is firstly manufactured in a 3D printing mode and then the light transmission layer 2 is prepared in a glue solution filling mode, it is also feasible that the height Hb of the light transmission unit is slightly higher than the height Ha of the shading unit 31.
Further, the thickness Wa of the light shielding units 31 is 5 to 25 μm, the light-transmitting layer 2 is composed of a plurality of light-transmitting units with structures complementary to the light shielding units 31, and the thickness of the light-transmitting units is consistent with the space S between the light shielding units 31. The thickness Wa of the light shielding unit 31 is preferably 8 to 15 μm in view of light transmittance and the like.
Specifically, for more precise description, the sum of the thickness Wa of the light-shielding unit 31 and the pitch S between the light-shielding units 31 adjacent thereto is defined as the period of the light-shielding layer 3 in the first direction, that is, wa + S, is 25 to 65 μm, and preferably 30 to 45 μm in the period of the light-shielding layer 3 in the first direction.
Adopt mould processing mode among the prior art, be difficult to form and shake structure about in this scheme, consequently this application proposes a peep-proof membrane preparation method as follows, forms the light shield layer 3 structure of this application through 3D printing technique, and concrete method is as follows:
by adopting the 3D printing technology, the shading units 31 are printed by black glue, and then gaps among the shading units 31 are filled by white glue, so that the purpose of integral forming is achieved.
And establishing a three-dimensional digital model of the peep-proof membrane structure, and converting the three-dimensional digital model into a working instruction for controlling the 3D printing equipment to work. The feeding chamber that 3D printing apparatus was put into to the ebonite raw materials that will print peep-proof structure, the ebonite raw materials be liquid, after the work order of receiving 3D printing apparatus, beats printer head and sprays the ebonite raw materials on 1 supporting layer in shaping district to quick curing forms the peep-proof structure of light shield layer 3. And filling white glue into the printed peep-proof structure on line, quickly curing to form a light transmission layer 2, and finally rolling to obtain the peep-proof film.
Specifically, the peep-proof film adopts a 3D printing technology, the structure of the light shielding layer 3 is printed on the surface of the supporting layer 1, and then the light transmitting layer 2 is filled in the gap of the light shielding layer 3, so that the purpose of integral forming is achieved.
By adopting the printing technical scheme, the mold processing barrier of the high-transmittance peep-proof film can be solved, theoretically, the height of the grating structure can be processed to be 1-1000 mu m, the width of the grating structure can be processed to be 1-1000 mu m, and the defects that the structure cannot be demoulded, the mold structure is deformed and the like are not needed to be worried about.
Specific examples, as follows:
example 1
Preparing a support layer, printing a structure of light shielding layers 3 on the support layer by a 3D printing technology, and filling light-transmitting layers 2 in gaps among the light shielding layers 3, wherein the structure of the light shielding units 31 is a wavy curve structure which is irregularly arranged, as shown in FIG. 4, the transverse width W of the light shielding units 31 is in a range of 3-4 μm, the spacing S between the light shielding units 31 is in a range of 30-35 μm, the distance L between any two adjacent peaks of the light shielding units 31 in the second direction is in a range of 900-1000 μm, the height Ha of the light shielding units 31 is 190 μm, the thickness Wa of the light shielding units 31 is in a range of 8-10 μm, the height Ha of the light shielding units 31 of the light-transmitting units is 190 μm, the thickness Wb of the light-transmitting units is consistent with the spacing S between the light shielding units 31, and the W, wa, S and L of the peeping structures are randomly varied at the same time to obtain the anti-glare film E1.
Example 2
Preparing a support layer, printing a structure of a light shielding layer 3 on the support layer by a 3D printing technology, filling a light transmitting layer 2 in a gap between the light shielding layer 3, wherein the structure of the light shielding units 31 is a regularly arranged wavy curve structure, as shown in FIG. 1, the transverse width W of the light shielding units 31 is 4 μm, the spacing S between the light shielding units 31 is 32 μm, the distance L between any two adjacent peaks of the light shielding units 31 in the second direction is 950 μm, the height Ha of the light shielding units 31 is 190 μm, the thickness Wa of the light shielding units 31 is 9 μm, the height Ha of the light shielding units 31 of the light transmitting units is 190 μm, and the thickness Wb of the light transmitting units is consistent with the spacing S between the light shielding units 31, so as to obtain the peep-proof film E2.
Comparative example 1
Preparing a support layer, manufacturing a structure of shading layers 3 on the support layer by a conventional method technology, and filling a light-transmitting layer 2 in the gap of the shading layers 3, wherein the structure of the shading units 31 is a linear peep-proof film structure, the space S between the shading units 31 is 32 μm, the height Ha of the shading units 31 is 90 μm, the thickness Wa of the shading units 31 is 13 μm, the height Ha of the shading units 31 of the light-transmitting units is 90 μm, the thickness Wb of the light-transmitting units is consistent with the space S between the shading units 31, and obtaining the peep-proof film E3.
The test method comprises the following steps:
and (3) interference elimination effect: and (3) placing the peep-proof film on the surface of the module to be tested, and confirming the interference grain change on the surface through the rotation angle. Generally, the smaller the rotation angle, the higher the utilization rate.
The peep-proof effect is as follows: the peep-proof film is placed on the surface of the module to be tested, the peep-proof effect is confirmed by looking at the side through the sight, and the better the peep-proof effect at the same angle is, the better the peep-proof effect of the film material is.
Peep-proof angle: the peep-proof film is placed on the surface of the module to be tested, and a visual angle with the brightness smaller than 1/10 of the central brightness is tested by using a BM-7 tester and the like.
Light transmittance: the peep-proof film is placed on the surface of the module to be tested, and the transmittance is confirmed through the brightness of the module before and after the peep-proof film is placed in a face-to-face mode. Or the membrane is placed in a specific transmittance instrument to test the transmittance.
The test results are shown in table 1:
| practice ofExample (b) | De-interference | Peep-proof effect | Peep-proof angle | Light transmittance |
| Example 1 | ≤1° | Superior food | 20-30° | 76％-78％ |
| Example 2 | ≤2° | Superior food | 20-30° | 74％-76％ |
| Comparative example 1 | 15～20° | In general | 73-80° | 63～65％ |
According to the test result, the peep-proof film adopting the structure is obviously superior to the peep-proof film adopting a linear structure in the prior art in peep-proof effect and light transmittance angle, and further, the shading unit structure adopting a transverse jitter curve is adopted, so that interference grains appearing in the using process of the peep-proof film can be obviously reduced, and a good interference solving effect is realized.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (8)
1. A privacy film comprising a support layer (1), and a light-transmitting layer (2) and a light-shielding layer (3) provided on one side surface of the support layer (1), characterized in that the light-shielding layer (3) comprises a plurality of light-shielding cells (31) arranged substantially in a first direction and extending substantially in a second direction; the first direction and the second direction are mutually vertical and are parallel to the surface of the support layer (1);
the shading unit (31) is of a curve structure which fluctuates along a second direction; the distance between any adjacent wave crests and wave troughs of the shading unit (31) in the first direction is the transverse width W of the shading unit (31), and the distance between any two adjacent wave crests of the shading unit (31) in the second direction is L; the transverse width W is 0.5-10 μm, and the distance L between any two adjacent peaks of the shading unit (31) in the second direction is 1-1000 μm.
2. Privacy film according to claim 1, wherein the lateral widths W of the light-shielding units (31) are the same or different, preferably the lateral widths W of the light-shielding units (31) are different.
3. The privacy film of claim 1, wherein the distance in the second direction between any two adjacent peaks of the light-shielding units (31) is L, and the distance in the second direction between any two adjacent peaks of the light-shielding units (31) is the same or different, preferably the distance in the second direction between any two adjacent peaks of the light-shielding units (31) is different.
4. The privacy film of claim 1, wherein a distance in the first direction between any one of the light-shielding cells (31) and its adjacent light-shielding cell (31) is a pitch S between the light-shielding cells (31), and the pitch S between the light-shielding cells (31) is greater than 0.
5. Privacy film according to claim 4, wherein the spacing S between the light-shielding units (31) is the same or different, preferably the spacing S between the light-shielding units (31) is different.
6. The privacy film of claim 5, wherein the spacing S between the light-shielding units (31) is 20-60 μm, preferably the spacing S between the light-shielding units (31) is 25-40 μm.
7. The privacy film of claim 1, wherein the height Ha of the light-shielding unit (31) is 1 to 1000 μm, and the height Hb of the light-transmitting unit is 1 to 1000 μm.
8. The privacy film according to claim 1, wherein the thickness Wa of the light-shielding units (31) is 5 to 25 μm, and the light-transmitting layer (2) is composed of a plurality of light-transmitting units having a structure complementary to that of the light-shielding units (31), and the thickness of the light-transmitting units corresponds to the spacing S between the light-shielding units (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211003420.6A CN115453674A (en) | 2022-08-19 | 2022-08-19 | Peep-proof film |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211003420.6A CN115453674A (en) | 2022-08-19 | 2022-08-19 | Peep-proof film |
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| CN115453674A true CN115453674A (en) | 2022-12-09 |
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| CN202211003420.6A Pending CN115453674A (en) | 2022-08-19 | 2022-08-19 | Peep-proof film |
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| CN (1) | CN115453674A (en) |
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