CN217425726U - Peep-proof film and display device - Google Patents

Abstract

The utility model belongs to the technical field of optics, especially, relate to a peep-proof membrane and display device. The utility model discloses a peep-proof membrane includes: the light guide part is a protrusion extending from the surface of the substrate to the direction far away from the surface of the substrate, and the light shielding part comprises a groove and a light shielding body arranged in the groove. The display device of the utility model comprises the peep-proof film. The utility model discloses can realize the function of multi-angle peep-proof.

Description

Peep-proof film and display device

Technical Field

The utility model relates to the field of optical technology, especially, relate to a peep-proof membrane and display device.

Background

The prior art privacy film usually employs a louver microstructure, and the privacy film disclosed in patent document No. CN211856959U, for example, employs a grating arranged at intervals to form the louver microstructure. By adopting the peep-proof film with the shutter structure, light rays coming out of the screen can form a preset visual angle in the left and right directions after passing through the peep-proof film. When the observer is in the range of the visible angle in the left-right direction, the content displayed on the screen can be seen, and when the observer is out of the range of the visible angle in the left-right direction, the content displayed on the screen cannot be seen, so that the function of peeping prevention in the left-right direction is realized. However, the angle at which the viewer can view the content displayed on the screen in the up-down direction is not limited as in the left-right direction. Because the current peep-proof film can only play the peep-proof function in the left and right direction, and does not have the peep-proof function in the up and down direction, the possibility of revealing privacy easily exists.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present invention provides a peep-proof membrane and a display device for solving the technical problem that the existing peep-proof membrane cannot play the peep-proof function in multiple directions.

The utility model adopts the technical proposal that:

in a first aspect, the utility model provides a peep-proof membrane, including the basement, distribute in a plurality of light guide parts of basement to and enclose and locate every light guide part outlying shading portion, the surface orientation that light guide part is for keeping away from the basement by the basement extends the arch, shading portion includes the recess, and set up in the light-proof body of recess.

Preferably, the light-shielding body is an optical film, and the optical film is arranged on the side wall around the groove.

Preferably, the optical film includes low refractive index metal oxides and high refractive index metal oxides alternately arranged in a predetermined direction.

Preferably, the light shielding body is a light shielding material filled in the groove.

Preferably, the light-shielding body is an electroactive polymer disposed at a bottom surface of the groove.

Preferably, a first electrode and a second electrode for generating an electric field for driving the electroactive polymer to extend from the bottom surface of the pit in a direction away from the bottom surface of the pit by a voltage applied thereto are respectively provided on both sides of the light-shielding film in the pit depth direction.

Preferably, the portable electronic device further comprises a first lead and a second lead, the first electrode is electrically connected with the external power supply device through the first lead, and the second electrode is electrically connected with the external power supply device through the second lead.

Preferably, the orthographic projection of the light guide part on the substrate is in a polygon obtained by randomly splitting a plane.

Preferably, the orthographic projection of the light guide part on the substrate is shaped as a Thiessen polygon.

In a second aspect, the present invention further provides a display device, comprising a display panel and the first aspect, wherein the anti-peeping film is located on one side of the display panel.

Has the advantages that: the utility model discloses a peep-proof membrane utilizes the anti-dazzling body that sets up in the recess between the light guide part all to cover each lateral wall of light guide part. Since the light-shielding body is opaque, light emitted by the display device can only pass through the front surface of the light-guiding portion, but not through any side wall of the light-guiding portion that is covered by the light-shielding body. Consequently adopt the utility model discloses a behind the peep-proof membrane, the user can only be followed the positive content that sees display device and show of peep-proof membrane, can not see the content that display device shows at any angle except that openly to the function of multi-angle peep-proof has been realized.

The utility model provides a display device is owing to set up in one side of display panel the utility model provides a peep-proof membrane, the light that consequently display panel sent can only be followed the front of peep-proof membrane and passed through, and can not pass through the peep-proof membrane from other angles, therefore the user can only be followed display device's front and watched the content that display device shows, and can't watch from any angle of other the utility model discloses a content that display device shows, consequently the utility model discloses a display device also has the function of multi-angle peep-proof.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings, and these drawings are all within the protection scope of the present invention.

Fig. 1 is a front view of a first structural form of the anti-peeping membrane of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic view of the first structural form of the present invention, when the pit structure is stamped by the anti-peeping film and is not filled with the shading material;

fig. 4 is a front view of a second structural form of the anti-peeping membrane of the present invention;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

fig. 6 is a front view of a third structural form of the anti-peeping membrane of the present invention;

FIG. 7 is a cross-sectional view C-C of FIG. 6;

fig. 8 is a schematic structural view of the middle electro-active polymer of the present invention covering the light guide portion after stretching;

FIG. 9 is a schematic view of the structure of the electroactive polymer of the present invention when it is not stretched;

fig. 10 is a schematic view of the peep-proof film with the polygonal light guide structure obtained by the random division method according to the present invention.

Parts and numbers in the drawings:

the light-shielding layer comprises a substrate 10, a light guide part 20, a light-shielding part 30, an optical film 31, an electroactive polymer 32, a regular hexagonal protrusion 41, a triangular groove 42, a regular quadrangular protrusion 43, a regular quadrangular groove 44, a side wall 45, a pit 50, a bottom surface 51 of the pit, an anti-glare layer 60, a protrusion structure 70, a first electrode 81, and a second electrode 82.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In case of conflict, various features of the embodiments and examples of the present invention may be combined with each other and are within the scope of the present invention.

Example 1

As shown in fig. 1 and 2, the present embodiment provides a privacy film, and the privacy film of the present embodiment includes: the light guide device comprises a substrate 10, a plurality of light guide parts 20 distributed on the substrate 10, and a light shielding part 20 arranged around the periphery of the single light guide part 30, wherein the light guide part 20 is a protrusion extending from the surface of the substrate 10 to the direction far away from the surface of the substrate 10, and the light shielding part comprises a groove and a light shielding body arranged in the groove.

The light shielding portion 30 covers the side wall 45 of the light guide portion 20, and light passes through a portion of the light guide portion 20 not covered by the light shielding portion 30.

The light guide part 20 is used to guide the light emitted from the display device to pass through the front surface of the light guide part 20, and the number of the light guide parts 20 is greater than or equal to 2 in this embodiment. The light guide parts 20 are arranged at a certain interval so that grooves may be formed between adjacent light guide parts 20 and the light shielding parts 30 may be disposed in the grooves. The orthographic projection of the light guide part 20 on the substrate 10 refers to a projection pattern of the light guide part 20 on the substrate 10 along a vertical direction. The light shielding portion 30 is made of a material that does not transmit light. When the light shielding portion 30 completely covers the sidewall 45 of the light guide portion 20, the light emitted from the display device cannot pass through the sidewall 45 of the light guide portion 20, but only passes through the front surface (within the range of the angle a in fig. 2) of the light guide portion 20 that is not shielded by the light shielding portion 30, so that the viewer cannot see the display contents of the display device at any angle except the front surface of the privacy film. The privacy film of this sample embodiment achieves privacy at any angle.

The privacy film obtained by using the light guide part 20 having the above structure can be processed and manufactured by a micro-nano processing technology. The aforementioned micro-nano processing techniques include, but are not limited to, thermoplastic, ultraviolet nanoimprint, injection molding, stamping, photolithography, and the like. In specific implementation, a micrometer or nanometer scale pattern corresponding to the structure may be designed and processed, and then the designed micrometer or nanometer scale pattern is processed on a mold through ultraviolet lithography, electron beam lithography, machining, and the like, and then the processed module is used to prepare the substrate 10 through imprinting, injection molding, stamping, and the like.

The peep-proof film manufactured by the manufacturing method in the embodiment is simple in process, low in cost and capable of being produced in a large scale, and the manufactured pattern has high resolution, so that the obtained peep-proof film is high in structural precision and excellent in peep-proof effect.

As one embodiment, in the present embodiment, the light guide part 20 includes a protrusion structure 70 extending away from the substrate 10, a recess 50 is disposed between two adjacent protrusion structures 70, and the light shielding part 30 is disposed in the recess 50. In the present embodiment, a plurality of convex structures 70 with a polygonal cross section are adopted as the light guide part 20, and the convex structures 70 are arranged and combined in a certain manner to form a structure of the privacy film. In this embodiment, the pits 50 shown in fig. 3 can be formed on the surface of the substrate by a process such as nanoimprint, the raised structures 70 are formed in the portions between the pits 50, and the pits 50 also leave spaces for arranging the light-shielding portions 30 in this embodiment, so that the high-precision privacy film structure can be manufactured more conveniently.

Example 2

In this embodiment, the light-shielding body is a light-shielding material filled in the groove. In this embodiment, the light-shielding material is filled in the concave recesses 50, so that the light-shielding material can completely shield the side walls 45 of the light guide part 20. By adopting the structure, the pit 50 can be processed in the previous step, and then the shading materials such as printing ink and the like are directly filled in the pit 50, so that the manufacturing process is simpler, the manufacturing cost is lower, and the generation efficiency is also remarkably improved. The light-shielding material can be black photoresist, black ink, black high molecular polymer and the like.

As light guide portion 20, for example, the projections of a regular hexagon used in fig. 1, in which the size of each regular hexagon is the same, are arranged in a plurality of rows, and each row includes a plurality of projections of a regular hexagon. The protrusions of the regular hexagon deformations in two adjacent rows are staggered in the column direction, and the staggered distance can be the length of one regular hexagon, namely, the vertex on the left side of the bottom edge of the regular hexagon in the upper row is connected with the vertex on the right side of the bottom edge of the regular hexagon in the lower row in the figure. A triangular recess 50 is formed in the middle of three adjacent regular hexagonal protrusions 41, and the light shielding material is filled in the triangular recess 50. The light blocking material filled in the triangular recesses 50 completely blocks six faces of the regular hexagonal protrusions 41, so that light can pass only through the front faces of the regular hexagonal protrusions.

As a preferable mode, the light-shielding material of this embodiment may also fill the concave pits 50 to ensure that the light-shielding material can sufficiently shield the side walls 45 of the light guide part 20. In other embodiments, the concave recesses 50 may not be filled with the light-shielding material, but the side walls 45 of the light guide 20 need to be completely shielded.

Example 3

In addition to the structure in which the foregoing light-shielding material is used to fill the recesses 50, the present embodiment also provides a peep-proof film in another structural form. As shown in fig. 4 and fig. 6, in the present embodiment, the light shielding body is disposed as an optical film 31, and the optical film 31 is disposed on the sidewall of the periphery of the groove. As shown in fig. 5 and 7, the present embodiment may adopt a method of plating a film on the side wall 45 of the pit 50 so that the light-shielding material covers the side wall 45 of the pit 50 in the form of a thin film, and leaves the bottom surface inside the pit 50 without shielding by the light-shielding material. Since the inner sidewalls 45 of the concave 50 are also the sidewalls 45 outside the convex structure 70 after the light guide 20 adopts the convex structure 70, the light shielding material can also shield the outer wall of the convex structure 70 by adopting the above-mentioned arrangement mode of the optical film 31. Since the optical film 31 only covers the sidewalls 45 in the concave 50 and the bottom 51 of the concave is not covered by the light shielding material, light can still pass through the bottom 51 of the concave, therefore, for the concave 50, the light guide part 20 can be formed except for the optical film 31, except that the light guide part 20 is equivalent to the light guide part 20 of the convex structure 70 and is recessed toward the substrate 10. Since the peripheral sides of the recessed structure are all covered by the optical film 31, only the bottom surface of the recessed structure is left, and light can only pass through the bottom of the recessed structure, an observer can only see the light emitted by the recessed structure from the front side, but cannot see the light emitted by the recessed structure from the periphery of the recessed structure. As can be seen from the above analysis, in the present embodiment, the light-shielding material is made into a film form, so that the convex structures 70 can be effectively shielded to form the light guide portions 20 that allow only light to pass through from the front surface, and the concave structures formed between the convex structures 70 can be effectively shielded to form the light guide portions 20 that allow only light to pass through from the front surface. In the embodiment, the light-shielding part 30 in the form of a thin film is skillfully utilized to form the light-guiding part 20 which only allows light to pass through from the front side at the convex part and the concave part of the privacy film, so that the area of the privacy film, through which light can pass from the front side, is greatly increased, and the integral light transmittance of the privacy film at a visual angle is also remarkably improved while the multi-angle privacy effect of the feedback film is met.

As shown in fig. 4, as a specific embodiment of a privacy film using the structure of the optical film 31, regular hexagonal protrusions 41 each having the same size can be used as the light guide part 20 in the present embodiment, and the regular hexagonal protrusions 41 are arranged in a plurality of rows, each row including a plurality of regular hexagonal protrusions 41. The regular hexagon protrusions in two adjacent rows are staggered in the column direction, and the staggered distance can be the length of one regular hexagon, namely, the top point on the left side of the bottom edge of the regular hexagon in the upper row is connected with the top point on the right side of the bottom edge of the regular hexagon in the lower row in the figure. As shown in fig. 4 and 5, a triangular recess 50 is formed in the middle of three adjacent regular hexagonal protrusions 41, and the optical film 31 covers three side walls 45 in the triangular recess 50, and the bottom 51 of the triangular recess is left without covering the optical film 31. At this time, the six side walls 45 of the regular hexagonal protrusions 41 are blocked by the optical film 31, and light can pass through only the front surfaces of the regular hexagonal protrusions 41. Meanwhile, the optical film 31 covering the three side walls 45 in the triangular recess 50 encloses a triangular groove 42, the three side walls 45 of the triangular groove 42 are also shielded by the optical film 31, and light can only pass through the front of the triangular groove 42.

As a specific example of the privacy film using the aforementioned optical film 31 structure, as shown in fig. 6, regular quadrilateral projections 43 each having the same size can be used as light guide part 20 in the present embodiment, and these regular quadrilateral projections 43 are arranged in a plurality of rows, each row including a plurality of regular quadrilateral projections 43. The regular four deformed bulges in two adjacent rows are staggered in the column direction, and the staggered distance can be the length of one regular quadrangle, namely the vertex on the left side of the bottom side of the regular quadrangle in the upper row is connected with the vertex on the right side of the bottom side of the regular quadrangle in the lower row. As shown in fig. 6 and 7, the four adjacent regular-edge-shaped protrusions together form a regular quadrilateral concave pit 50, and the optical film 31 covers the four side walls 45 in the regular-edge-shaped concave pit 50, and leaves the bottom 51 of the regular-edge-shaped concave pit free and does not cover the optical film 31. At this time, the four side walls 45 of the regular quadrangular projections 43 are blocked by the optical film 31, and light can pass only through the front surfaces of the regular quadrangular projections 43. Meanwhile, the optical film 31 covering the four side walls 45 in the regular quadrilateral concave 50 encloses a regular quadrilateral groove 44, the four side walls 45 of the regular quadrilateral groove 44 are also shielded by the optical film 31, and light can only pass through the front of the regular quadrilateral groove 44.

In this embodiment, the optical film 31 for shielding the peripheral side wall 45 of the light guide part 20 can be manufactured by coating the side wall 45 of the concave 50. The coating method includes, but is not limited to, Physical Vapor Deposition (Physical Vapor Deposition) and Chemical Vapor Deposition (Chemical Vapor Deposition). The light-shielding material layer on the outer surface of the structure and the inner bottom surface of the pit 50 can be erased after the coating of the pit 50 is completed, wherein the erasing method includes, but is not limited to, wet etching, dry etching, laser etching, plasma etching, polishing, and the like.

In this embodiment, the thickness of the optical film 31 is in the range of 100nm to 400 nm. The optical film can also adopt an optical film with special color, an optical film with space gradient color characteristic and an optical film with angle gradient color characteristic. Therefore, better visual experience can be provided for the user while the peep-proof function is realized.

As one of the ways, the optical film having the angle-gradient characteristic may be such that a metal opaque layer is coated as a substrate and then two transparent materials of low refractive index and high refractive index are alternately coated on the metal opaque layer. For example, an optical film having an angularly graded color characteristic can be obtained by alternately coating a metal aluminum layer with a low refractive index material, Si02, and a high refractive index material, Ti 02.

As another embodiment, the optical film 31 includes metal oxides having a low refractive index and metal oxides having a high refractive index alternately arranged in a predetermined direction. Wherein the low refractive index metal oxide may be SiO, AlO, AlOOH or mixtures thereof, which may have an alkali metal oxide or an alkaline earth metal oxide as an additional component. And wherein the high refractive index metal oxide may be TiO, ZrO, FeO, CrO, ZnO or a mixture of these oxides. It may also be iron titanate, hydrated iron oxide, oxidized titanium suboxides or mixtures and/or mixed phases of these compounds.

As one of the embodiments, the optical film 31 of the present embodiment is a metal film having a thickness of 30nm to 400 nm. The metal film is used as the light-shielding film, so that the light guide part 20 can be effectively shielded, and the peep-proof film has metal color.

Example 4

In practical applications, in some scenarios, a user needs to make the displayed content of the display screen visible at various angles, for example, when the displayed content of the display screen needs to be presented to multiple people at the same time. In order to protect personal privacy, the user wants the content displayed on the display screen to be visible only from the front side of the display screen. However, after the existing peep-proof film is manufactured, the characteristic that the film can only transmit light from the front side becomes the inherent characteristic of the peep-proof film, and a user cannot adjust the film according to the actual use scene. In this regard, as one of preferable embodiments, the light-shielding body is an electroactive polymer 32 disposed on the bottom surface of the groove in this embodiment.

The electroactive polymer 32 is a polymer that extends in a predetermined direction under the action of an electric field, and the electroactive polymer 32 is disposed on the bottom 51 of the recess. As shown in fig. 8, when the electroactive polymer 32 is subjected to an electric field along the depth of the recess 50, the electroactive polymer 32 extends from the bottom 51 of the recess away from the bottom of the recess 50 to a position that completely covers the sidewalls 45 of the recess 50. The depth direction of the pits 50 is perpendicular to the plane of the substrate 10.

As shown in fig. 9, the deformable electroactive polymer 32 is applied to the bottom 51 of the recess, and the direction in which the electroactive polymer 32 extends is the depth direction of the recess 50, i.e., the X direction in fig. 9. When the specific condition is not satisfied, the electroactive polymer 32 is in a contracted state, and the electroactive polymer 32 is hidden at the bottom of the recess 50 and does not shield the sidewall 45 of the light guide 20. The light can pass through the front surface of the light guide unit 20, or can pass through the side surface of the light guide unit 20. Therefore, the observer can see the content displayed by the display device from the front side of the peep-proof film and can also see the content displayed by the display device from other angles, and the peep-proof film is used as a conventional film. As shown in fig. 7, when a specific condition is satisfied, the electroactive polymer 32 deforms and extends from the bottom of the recess 50 to the top of the recess 50, and after the electroactive polymer 32 extends to the top of the recess 50, the sidewall 45 around the light guide part 20 can be completely covered by the electroactive polymer 32, so that light can only pass through the front surface of the light guide part 20, thereby achieving the effect of the privacy film.

In order to control the electroactive polymer 32 to extend and deform conveniently, the electroactive polymer 32 is made of a material that can extend and deform under the action of an electric field. And a first electrode 81 and a second electrode 82 are respectively arranged on two sides of the electroactive polymer 32 along the depth direction of the pit 50, wherein the first electrode 81 and the second electrode 82 are used for generating an electric field for driving the electroactive polymer 32 to extend from the bottom 51 of the pit to a direction away from the bottom of the pit 50 by applying a voltage thereon.

In a specific implementation, a voltage may be applied to the first electrode 81 and the second electrode 82, a space electric field may be generated by the first electrode 81 and the second electrode 82, the direction of the space electric field is the depth direction of the pit 50, and the electroactive polymer 32 may also extend from the bottom of the pit 50 to the top of the pit 50 along the depth direction of the pit 50 under the action of the electric field. Therefore, the embodiment can flexibly control the electroactive polymer 32 to switch between the extended state and the telescopic state by controlling whether to apply the voltage to the first electrode 81 and the second electrode 82, so as to control the peep-proof membrane to flexibly turn on and off the peep-proof function, so that the peep-proof membrane can be conveniently and quickly switched between the peep-proof membrane state and the conventional membrane state. In the present embodiment, the material of the electroactive polymer 32 may be an electroactive polymer, and the polarization direction of the electroactive polymer is made parallel to the depth direction of the pits 50. The Electroactive Polymers (EAP) are smart materials, have special electrical and mechanical properties, and undergo small deformations when electrically stimulated. Electroactive polymers are capable of changing their shape or size under the influence of an electric field. When the electroactive polymer is subjected to an electric field with the same polarity as the polarization voltage of the electroactive polymer, the polarization strength of the electroactive polymer is increased, the distance between positive and negative bound charges in a body is increased, and the electroactive polymer is subjected to elongation deformation along the direction parallel to the polarization direction. When the electric field is removed, the electroactive polymer contracts back to its original shape. The aforementioned electroactive polymers in the present embodiment include, but are not limited to, All Organic Composite (AOC), electrostrictive grafted elastomer (ESGE), electrostrictive film (ESP), electroviscoelastic polymer (EVEM), ferroelectric polymer (FEP) and Liquid Crystal Elastomer (LCE), Carbon Nanotube (CNT), Conductive Polymer (CP), electrorheological liquid (ERF), Ionic Polymer Gel (IPG), and ionic polymer based metal composite (IPMC), etc.

In order to conveniently apply a voltage to the first electrode and the second electrode, the anti-peeping film of the embodiment further includes a first conducting wire and a second conducting wire, and the external power supply device is electrically connected with the first electrode 81 through the first conducting wire and is electrically connected with the second electrode 82 through the second conducting wire. Wherein the first wire and the second wire can adopt nano silver wires. In order to keep the voltage of the electroactive polymer 32 stable during the extension deformation process so as to accurately control the extension deformation of the peep-proof membrane, the first electrode 81 and the second electrode 82 of the present embodiment may be flexible electrodes.

Example 5

As shown in fig. 10, in this embodiment, as a preferred embodiment, the shape of the orthographic projection of the light guide part 20 on the substrate 10 is a polygon obtained by randomly splitting a plane. The present embodiment may also divide the film into a mesh form as shown in fig. 10 by means of random division, wherein the polygon of the blank part in fig. 10 is used as the light guide part 20 of the polygon, and the shaded part is used as the shielding part. The light guide part 20 may be a protrusion structure 70 or a groove structure, which is not limited herein. The light guide part 20 with the polygonal structure obtained by the method is random in shape or arrangement, so that the condition that the anti-peeping film generates moire or rainbow patterns is effectively avoided, and the visual experience effect of the anti-peeping film is further improved.

Example 6

As one of preferable embodiments, in the present embodiment, the shape of the orthographic projection of the light guide part on the substrate is a taison polygon. Thiessen polygons, also called Voronoi diagram, are a set of continuous polygons made up of perpendicular bisectors connecting two neighboring point segments, known as GeorgyVoronoi. Any point within a Thiessen polygon is less distant from the control points that make up the polygon than from the control points of other polygons.

In addition, the privacy film of the present embodiment further includes an antiglare layer 60 on a side of the light guide portion 20 opposite to the substrate 10. The anti-glare layer 60 is formed by processing the surface of the film to form a fine concave-convex structure on the surface of the film, so that the reflected light on the surface is scattered, thereby eliminating reflection and avoiding glare. The surface treatment may be performed by applying a resin solution in which high-refractive-index fine particles are dispersed by a coating method such as spin coating to form an antiglare treatment layer, or by applying an acrylic resin by a coating method such as spin coating to form an antiglare treatment layer; then, the antiglare treatment layer is provided with a fine uneven structure capable of scattering reflected light directly on the surface by a mechanical method or a chemical method, thereby obtaining a final antiglare layer 60.

Example 7

The embodiment provides a display device, which is characterized by comprising a display panel and the peep-proof film in the embodiment 1, wherein the peep-proof film is positioned on one side of the display panel. The display device in this embodiment adopts the foregoing peep-proof film, so that light emitted by the display panel can only pass through the front side of the peep-proof film, and an observer can only view the content displayed by the display device from the front side of the display device, and cannot view the content displayed by the display device at any other angle.

As described above, only the specific embodiments of the present invention are provided, and those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working processes of the system, the module and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered by the scope of the present invention.

Claims (10)

1. A privacy film, comprising: the light guide part is a protrusion extending from the surface of the substrate to the direction far away from the surface of the substrate, and the light shielding part comprises a groove and a light shielding body arranged in the groove.

2. The privacy film of claim 1, wherein the light-shielding body is an optical film disposed on the sidewall of the periphery of the groove.

3. The privacy film of claim 2, wherein the optical film comprises low refractive index metal oxides and high refractive index metal oxides alternately arranged in a predetermined direction.

4. The privacy film of claim 1, wherein the light-shielding body is configured as a light-shielding material filled in the groove.

5. The privacy film of claim 1, wherein the light-shielding body is an electroactive polymer disposed on the bottom surface of the groove.

6. The privacy film of claim 5, wherein a first electrode and a second electrode are disposed on each side of the electroactive polymer in a depth direction of the recess, and the first electrode and the second electrode are configured to generate an electric field for driving the electroactive polymer to extend from the bottom of the recess in a direction away from the bottom of the recess by a voltage applied thereto.

7. The privacy film of claim 6, further comprising a first wire and a second wire, wherein the first electrode is electrically connected to an external power supply via the first wire and the second electrode is electrically connected to the external power supply via the second wire.

8. The privacy film of claim 1, wherein the orthographic projection of the light guide part on the substrate is in the shape of a polygon obtained by randomly splitting a plane.

9. The privacy film of claim 1, wherein the orthographic projection of the light directing portion on the substrate is shaped as a Thiessen polygon.

10. A display device comprising a display panel and the privacy film of any one of claims 1 to 9, the privacy film being located on one side of the display panel.

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