CN115494660A - Peep-proof film and display device - Google Patents

Abstract

The application discloses peep-proof membrane and display device, wherein peep-proof membrane includes: a first substrate; a second substrate; a liquid crystal layer disposed between the first substrate and the second substrate; a first electrode; the second electrode and the first electrode are arranged on the same side or different sides of the liquid crystal layer, and at least one of the second electrode and the first electrode comprises a strip-shaped electrode; in the first mode, no voltage is applied to the second electrode and the first electrode, liquid crystal molecules of the liquid crystal layer have a pretilt angle, and the peep-proof film is in a peep-proof state; in a second mode, a voltage is applied to the second electrode and the first electrode, the liquid crystal layer diffracts incident light perpendicular to the plane where the first substrate is located, and the peep-proof film is in a sharing state. This application utilizes liquid crystal diffraction characteristic to form peep-proof device, has the advantage that the preparation technological requirement is low and with low costs for the peep-proof display device based on the automatically controlled birefringence characteristic of liquid crystal, and the peep-proof membrane of this application has better reliability simultaneously.

Description

Peep-proof film and display device

Technical Field

The application relates to the technical field of display, in particular to a peep-proof film and a display device.

Background

In the rapidly growing information age, people are beginning to pay more and more attention to the protection of personal information. Therefore, display equipment with a peep-proof function is produced, and the display equipment can only enable a user at a positive visual angle to have readability of display content, so that observers at the side cannot see the display content, and information privacy of the user is effectively protected. One layer of peep-proof protective film needs to be installed on the traditional peep-proof display device, but peep-proof and normal display mode switching cannot be automatically carried out, and the traditional visual angle controllable peep-proof display device does not have the characteristic that the visual angle range can be regulated and controlled. While the other type of display device with peep-proof and switching functions requires special design of electrodes, such display devices usually affect the display effect, such as reduced contrast, color shift, poor resolution, etc.

Generally, the existing display equipment with peeping prevention and switching functions is based on the electric control birefringence characteristic of liquid crystal, and the dimming liquid crystal box is used as an electric control half-wave plate to regulate and control light by utilizing the liquid crystal birefringence principle, so that the light with a large visual angle is shielded by a lower polarizer of the display equipment or the lower polarizer of the dimming box, and the peeping prevention and the visual angle narrowing effects are achieved. However, the peep-proof display device based on the liquid crystal electric control birefringence characteristic has the disadvantages of high manufacturing process difficulty, high cost and low reliability and tolerance.

Disclosure of Invention

The application provides a peep-proof membrane and display device to reduce peep-proof display device's the preparation degree of difficulty and cost.

The present application provides a privacy film, which includes:

a first substrate;

a second substrate;

a liquid crystal layer disposed between the first substrate and the second substrate;

a first electrode;

the second electrode and the first electrode are arranged on the same side or different sides of the liquid crystal layer, and at least one of the second electrode and the first electrode comprises a strip-shaped electrode;

in a first mode, no voltage is applied to the second electrode and the first electrode, liquid crystal molecules of the liquid crystal layer have a pretilt angle, and the peep-proof film is in a peep-proof state; in a second mode, a voltage is applied to the second electrode and the first electrode, the liquid crystal layer diffracts incident light perpendicular to the plane of the first substrate, and the peep-proof film is in a sharing state.

Optionally, in some embodiments of the present application, at least one of the second electrode and the first electrode includes at least two strip electrodes, and the at least two strip electrodes are disposed at an interval.

Optionally, in some embodiments of the present application, a ratio of a length of the strip-shaped electrode perpendicular to the extending direction of the strip-shaped electrode to a distance between adjacent strip-shaped electrodes perpendicular to the extending direction of the strip-shaped electrode is greater than or equal to 0.7 and less than or equal to 0.78.

Optionally, in some embodiments of the present application, the first electrode is disposed on a side of the first substrate close to the liquid crystal layer, the second electrode is disposed on a side of the first electrode close to the liquid crystal layer, and an insulating layer is disposed between the second electrode and the first electrode.

Optionally, in some embodiments of the present application, in the first mode, the pretilt angle is an included angle between a long axis of the liquid crystal molecules in the liquid crystal layer and an extending direction of the strip electrode, and the pretilt angle is greater than zero degrees and less than or equal to 15 degrees.

Optionally, in some embodiments of the present application, the first electrode is a whole-surface electrode, and the second electrode is a strip-shaped electrode.

Optionally, in some embodiments of the present application, the first electrode and the second electrode are both stripe electrodes, and an orthographic projection of the first electrode on the first substrate and an orthographic projection of the second electrode on the first substrate are staggered.

Optionally, in some embodiments of the present application, the first electrode is disposed on a side of the first substrate close to the liquid crystal layer, the second electrode is disposed on a side of the second substrate close to the liquid crystal layer, the first electrode and the second electrode are both strip-shaped electrodes, and the orthographic projection of the first electrode on the first substrate and the orthographic projection of the second electrode on the first substrate are staggered.

Optionally, in some embodiments of the present application, in the first mode, the pretilt angle is an included angle between a long axis of a liquid crystal molecule in the liquid crystal layer and a normal direction of the first substrate, and the pretilt angle is greater than zero degree and less than or equal to 15 degrees.

Accordingly, the present application also provides a display device, comprising:

the peep-proof membrane is described above;

a first polarizer;

a second polarizer;

the display panel is arranged between the first polaroid and the second polaroid;

the peep-proof film is arranged on one side, far away from the display panel, of the first polarizer.

Optionally, in some embodiments of the present application, the display device further includes:

a collimated light source;

the light guide plate is arranged on one side, far away from the display panel, of the peep-proof film, and the collimated light source is arranged on one side face of the light guide plate.

Optionally, in some embodiments of the present application, the display device further includes:

a backlight light source;

the light guide plate is arranged on one side, far away from the display panel, of the peep-proof film, the backlight source is arranged on one side face of the light guide plate, and a collimation film is arranged between the backlight source and the light guide plate.

The application provides a peep-proof membrane and display device, wherein the peep-proof membrane includes: a first substrate; a second substrate; a liquid crystal layer disposed between the first substrate and the second substrate; a first electrode; the second electrode and the first electrode are arranged on the same side or different sides of the liquid crystal layer, and at least one of the second electrode and the first electrode comprises a strip-shaped electrode; in a first mode, no voltage is applied to the second electrode and the first electrode, liquid crystal molecules of the liquid crystal layer have a pretilt angle, and the peep-proof film is in a peep-proof state; in a second mode, a voltage is applied to the second electrode and the first electrode, the liquid crystal layer diffracts incident light perpendicular to the plane of the first substrate, and the peep-proof film is in a sharing state. The application enables the peep-proof film to be in a peep-proof state in a first mode; in a second mode, the liquid crystal layer diffracts incident light perpendicular to the plane of the first substrate, and the peep-proof film is in a sharing state; consequently this application utilizes liquid crystal diffraction characteristic to form peep-proof device, has the advantage that the preparation technological requirement is low and with low costs for the peep-proof display device based on the automatically controlled birefringence characteristic of liquid crystal, and the peep-proof membrane of this application has better reliability simultaneously.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a first structure of a privacy film provided herein;

FIG. 2 is a schematic plan view of liquid crystal molecules of the liquid crystal layer in a first mode;

fig. 3 is a schematic view of a first structure of a display device provided in the present application;

fig. 4 is a second structural diagram of the display device provided in the present application;

fig. 5 is a schematic view of a second structure of the privacy film provided herein;

fig. 6 is a schematic view of a third structure of the privacy film provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The present application provides a privacy film and a display device, which will be described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments of the present application.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic view of a first structure of a privacy film 100 provided by the present application, and fig. 2 is a schematic plan view of liquid crystal molecules 51 of a liquid crystal layer 50 in a first mode. The embodiment of the present application further provides a peep-proof membrane 100, which includes: a first substrate 10, a second substrate 20, a liquid crystal layer 50, a first electrode 30, and a second electrode 40;

the liquid crystal layer 50 is disposed between the first substrate 10 and the second substrate 20;

the second electrode 40 and the first electrode 30 are disposed on the same side or different sides of the liquid crystal layer 50, at least one of the second electrode 40 and the first electrode 30 includes a strip-shaped electrode, and an electric field is generated in the liquid crystal layer 50 when a voltage is applied to the second electrode 40 and the first electrode 30;

in the first mode, no voltage is applied to the second electrode 40 and the first electrode 30, the liquid crystal molecules 51 of the liquid crystal layer 50 have a pretilt angle a, and the privacy film 100 is in a privacy state; in the second mode, a voltage is applied to the second electrode 40 and the first electrode 30, the liquid crystal layer 50 diffracts incident light perpendicular to the plane of the first substrate 10, and the privacy film 100 is in a shared state.

At least one of the second electrode 40 and the first electrode 30 is a strip-shaped electrode, so that an electric field is generated in a part of the liquid crystal layer 50 and the electric field is weaker or absent in another part of the liquid crystal layer 50, and thus the second electrode 40 and the first electrode 30 form a plurality of electric fields distributed at intervals in the liquid crystal layer 50, so that a phase difference can be generated after incident light enters the liquid crystal layer 50, the amplitude or the phase of the incident light is periodically and spatially modulated, and the liquid crystal layer 50 has a phase grating function, so that diffraction can be generated on the incident light.

In the first mode, no voltage is applied to the second electrode 40 and the first electrode 30, the liquid crystal molecules 51 in the liquid crystal layer 50 are aligned in a pre-alignment manner to form a uniform alignment, when light enters the liquid crystal layer 50 from a direction perpendicular to the plane of the first substrate 10, the liquid crystal layer 50 does not cause the incident light to form a phase difference due to the pre-tilt angle a of the liquid crystal molecules 51 in the liquid crystal layer 50, and the incident light is free from scattering and diffraction phenomena, but the effective major axis 511 of the liquid crystal molecules 51 in the liquid crystal dimming layer forms an included angle with the direction of the incident light in the side view direction of the privacy film 100, so that the light in the side view direction of the privacy film 100 is dark to realize privacy protection, and the privacy film 100 is in a privacy protection state. After a voltage is applied to the second electrode 40 and the first electrode 30, the liquid crystal molecules 51 periodically rotate under the action of the electric field between the second electrode 40 and the first electrode 30, incident light perpendicular to the plane of the first substrate 10 is dispersed into polarized light with a plurality of diffraction orders through the liquid crystal layer 50, so that the incident light forms a periodic phase difference, that is, a diffraction effect is generated on the incident light perpendicular to the plane of the first substrate 10, that is, the liquid crystal cell has a high-haze scattering effect, the liquid crystal cell can scatter the incident light, the sharing effect of the privacy film 100 is realized, and the privacy film 100 is in a sharing state.

Here, the peep-proof state is a state in which the light in the side view direction of the peep-proof film 100 is dark, and the light in the front view direction of the peep-proof film 100 has normal brightness, so that an observer in the side view direction of the peep-proof film 100 sees the peep-proof film as dark. The sharing state refers to a state where light rays in the side-view direction and the front-view direction of the privacy film 100 are at normal brightness, and therefore an observer in the side-view direction and the front-view direction of the privacy film 100 sees the normal brightness of the privacy film.

And this application utilizes liquid crystal diffraction characteristic to form the phase grating to form peep-proof device, need not set up the polaroid, and peep-proof display device based on automatically controlled birefringence characteristic of liquid crystal need set up the polaroid, and this application has the advantage that the preparation process requirement is low and with low costs for peep-proof display device based on automatically controlled birefringence characteristic of liquid crystal, and peep-proof membrane 100 of this application has better reliability simultaneously.

The magnitude of the voltage applied between the first electrode 30 and the second electrode 40 is not particularly limited, and may be set as appropriate, and the maximum voltage thereof is preferably 3V to 50V, more preferably 4V to 10V, and particularly preferably 6V to 10V.

Further, at least one of the second electrode 40 and the first electrode 30 includes at least two strip electrodes, and the at least two strip electrodes are spaced apart from each other.

In some embodiments, a ratio of a length of the strip-shaped electrode perpendicular to an extending direction of the strip-shaped electrode to a distance between adjacent strip-shaped electrodes perpendicular to the extending direction of the strip-shaped electrode is greater than or equal to 0.7 and less than or equal to 0.78. The ratio parameter between the length of the strip-shaped electrode perpendicular to the extending direction of the strip-shaped electrode and the distance between the adjacent strip-shaped electrodes perpendicular to the extending direction of the strip-shaped electrode can be set based on the response time of the liquid crystal molecules 51 and the haze requirement of the privacy film 100. Further, the strip-shaped electrodes extend along a straight line direction.

The liquid crystal layer 50 includes a polymer network 52 and liquid crystal molecules 51 distributed in the polymer network 52. When the liquid crystal molecules 51 are pre-aligned, the liquid crystal molecules 51 may be tilted to a predetermined angle by an electric field, and then the polymer in the dimming liquid crystal layer 50 is cured by ultraviolet light or the like to form a polymer network 52, and after the electric field is removed, the polymer network 52 maintains the liquid crystal molecules 51 tilted to the predetermined angle. In the above case, an optimal setting angle can be selected according to actual needs, and then the polymer network 52 is used to maintain the liquid crystal molecules 51 tilted at the setting angle.

It should be noted that, the present application may also adopt an alignment film to pre-align the liquid crystal molecules, and the pre-alignment of the liquid crystal molecules by using the alignment film is a conventional technical means in the art, and will not be explained in detail herein.

Further, in some embodiments, the electrical anisotropy of the liquid crystal molecules 51 in the liquid crystal layer 50 is greater than or equal to 7 and less than or equal to 15.2. The dielectric constant of the liquid crystal molecules 51 differs in magnitude in the long axis 511 and the short axis direction, and it is generally defined that the dielectric constant component in the long axis 511 direction of the liquid crystal molecules 51 is ∈/and the dielectric constant component perpendicular to the long axis 511 direction of the liquid crystal molecules 51 is ∈ j, and the difference Δ ∈ = ∈/∈ j. When Δ ∈ >0, the liquid crystal is electrically referred to as positive liquid crystal, and the long axis 511 of the liquid crystal molecule 51 rotates toward a direction parallel to the electric lines of force; when Δ ∈ <0, it is called negative liquid crystal, and the long axis 511 of the liquid crystal rotates toward the direction perpendicular to the electric lines of force. The liquid crystal material and the liquid crystal molecules 51 with positive dielectric anisotropy have the characteristics of high phase transition temperature, high-speed response (low rotational viscosity) and the like, and the electric anisotropy of the liquid crystal molecules 51 is more than or equal to 7 and less than or equal to 15.2, so that a very good diffraction effect can be achieved.

Further, in some embodiments, the optical anisotropy of the liquid crystal molecules 51 in the liquid crystal layer 50 is greater than or equal to 2 and less than or equal to 3. The optical refractive index of the liquid crystal molecules 51 is different in size between the long axis 511 and the short axis, the refractive index component in the long axis 511 is n/and the refractive index component perpendicular to the long axis 511 of the liquid crystal molecules 51 is n ≠ j. The component of the light that is refracted by the liquid crystal molecules 51 in the direction following the law of refraction is called ordinary light, i.e., o light; the other component does not follow the law of refraction and is called extraordinary light, i.e., e-light. The vibration directions of the o light and the e light are mutually perpendicular. Since the propagation velocities of the o-light and the e-light are different, the o-light and the e-light have a phase difference after transmitting the liquid crystal molecules 51, and the magnitude of the phase difference determines the vibration direction and intensity of the light after combining the two. In the present application, the optical anisotropy of the liquid crystal molecules 51 is set to be greater than or equal to 2 and less than or equal to 3, so that the liquid crystal layer 50 can form a good phase liquid crystal grating, and thus a very good diffraction effect can be achieved.

Further, in some embodiments, the first electrode 30 is disposed on a side of the first substrate 10 close to the liquid crystal layer 50, the second electrode 40 is disposed on a side of the first electrode 30 close to the liquid crystal layer 50, and an insulating layer 60 is disposed between the second electrode 40 and the first electrode 30.

Specifically, in the first mode, the pretilt angle a is an included angle between a long axis 511 of the liquid crystal molecules 51 in the liquid crystal layer 50 and the extending direction of the strip-shaped electrodes, and the pretilt angle a is greater than zero degrees and less than or equal to 15 degrees. Further, in the first mode, the pretilt angle a is 5 degrees or 7 degrees or 10 degrees, at this time.

The first electrode 30 is a full-surface electrode, and the second electrode 40 is a stripe electrode.

Referring to the following table, which shows experimental parameters for performing a side view on the haze of the privacy film 100, it can be known from the parameters of the table that no voltage is applied to the second electrode 40 and the first electrode 30, the liquid crystal molecules 51 of the liquid crystal layer 50 have the pretilt angle a, and the privacy film 100 is in the privacy state, where the privacy film 100 has the minimum haze. When the applied voltage of the second electrode 40 and the first electrode 30 reaches a predetermined value and the thickness of the liquid crystal layer 50 is a predetermined value, and the parameters of the electrical anisotropy and the optical anisotropy of the liquid crystal molecules 51 are matched, the maximum haze may be obtained, and at this time, the privacy film 100 is in the sharing state.

Referring to fig. 3, fig. 3 is a first structural schematic diagram of a display device 200 provided in the present application. Accordingly, an embodiment of the present application further provides a display device 200, which includes:

the privacy film 100 described above;

a first polarizer 201;

a second polarizer 202;

a display panel 203, wherein the display panel 203 is arranged between the first polarizer 201 and the second polarizer 202;

the privacy film 100 is disposed on a side of the first polarizer 201 away from the display panel 203.

Wherein the optical axis of the first polarizer 201 is perpendicular to the optical axis of the second polarizer 202.

The principle of the display device 200 to solve the problem is similar to that of the privacy film 100, so the implementation and beneficial effects of the display device 200 can be referred to the description of the privacy film 100, and the repeated parts are not described herein again.

Further, in some embodiments, the display device 200 further comprises:

a collimated light source 204;

the light guide plate 205 is disposed on a side of the privacy film 100 away from the display panel 203, and the collimated light source 204 is disposed on a side surface of the light guide plate 205.

The application uses the collimated light source 204 as the backlight light source of the display device 200, and the collimated light source 204 has the characteristic of small light angle, thereby being beneficial to obtaining better narrow visual angle effect.

Referring to fig. 4, fig. 4 is a second structural schematic diagram of the display device 200 provided in the present application. The present embodiment is different from the display device 200 provided in fig. 3 in that the display device 200 further includes:

a backlight light source 206;

the light guide plate 205 is disposed on a side of the privacy film 100 away from the display panel 203, the backlight source 206 is disposed on a side surface of the light guide plate 205, and a collimating film 207 is disposed between the backlight source 206 and the light guide plate 205.

The backlight source 206 is a common light source, and light of the backlight source is converted into collimated light by the collimating film 207 and then enters the light guide plate 205, so that a better narrow viewing angle effect can be obtained.

Please refer to fig. 5, fig. 5 is a schematic diagram of a second structure of the privacy film 100 provided in the present application. This embodiment differs from the privacy film 100 provided in fig. 1 in that: the first electrode 30 and the second electrode 40 are both strip-shaped electrodes, and the orthographic projection of the first electrode 30 on the first substrate 10 is staggered from the orthographic projection of the second electrode 40 on the first substrate 10.

Referring to fig. 6, fig. 6 is a schematic view of a third structure of the privacy film 100 provided in the present application. This embodiment differs from the privacy film 100 provided in fig. 1 in that: the first electrode 30 is arranged on one side of the first substrate 10 close to the liquid crystal layer 50, the second electrode 40 is arranged on one side of the second substrate 20 close to the liquid crystal layer 50, the first electrode 30 and the second electrode 40 are both strip-shaped electrodes, and the orthographic projection of the first electrode 30 on the first substrate 10 and the orthographic projection of the second electrode 40 on the first substrate 10 are staggered.

Further, in some embodiments, in the first mode, the pretilt angle a is an included angle between a long axis 511 of the liquid crystal molecules 51 in the liquid crystal layer 50 and a normal direction F of the first substrate 10, and the pretilt angle a is greater than zero degrees and less than or equal to 15 degrees. Specifically, in the first mode, the pretilt angle a is 5 degrees or 7 degrees or 10 degrees.

The peep-proof membrane 100 and the display device 200 provided by the embodiments of the present application are described in detail above, and the principle and the implementation manner of the present application are explained in the present application by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (12)

1. A privacy film, comprising:

a first substrate;

a second substrate;

a liquid crystal layer disposed between the first substrate and the second substrate;

a first electrode;

the second electrode and the first electrode are arranged on the same side or different sides of the liquid crystal layer, and at least one of the second electrode and the first electrode comprises a strip-shaped electrode;

in a first mode, no voltage is applied to the second electrode and the first electrode, liquid crystal molecules of the liquid crystal layer have a pretilt angle, and the peep-proof film is in a peep-proof state; in a second mode, a voltage is applied to the second electrode and the first electrode, the liquid crystal layer diffracts incident light perpendicular to the plane of the first substrate, and the peep-proof film is in a sharing state.

2. The privacy film of claim 1, wherein at least one of the second electrode and the first electrode comprises at least two strip electrodes spaced apart.

3. The privacy film of claim 2, wherein the ratio of the length of the strip-shaped electrodes perpendicular to the extending direction of the strip-shaped electrodes to the distance between adjacent strip-shaped electrodes perpendicular to the extending direction of the strip-shaped electrodes is greater than or equal to 0.7 and less than or equal to 0.78.

4. The privacy film of claim 1, wherein the first electrode is disposed on a side of the first substrate adjacent to the liquid crystal layer, the second electrode is disposed on a side of the first electrode adjacent to the liquid crystal layer, and an insulating layer is disposed between the second electrode and the first electrode.

5. The privacy film of claim 4, wherein in the first mode, the pretilt angle is an included angle between a long axis of liquid crystal molecules in the liquid crystal layer and an extending direction of the strip-shaped electrodes, and the pretilt angle is greater than zero degrees and less than or equal to 15 degrees.

6. The privacy film of claim 4, wherein the first electrode is a full-face electrode and the second electrode is a strip electrode.

7. The privacy film of claim 4, wherein the first electrode and the second electrode are both stripe electrodes, and wherein the orthographic projection of the first electrode on the first substrate is staggered from the orthographic projection of the second electrode on the first substrate.

8. The privacy film of claim 1, wherein the first electrode is disposed on a side of the first substrate adjacent to the liquid crystal layer, the second electrode is disposed on a side of the second substrate adjacent to the liquid crystal layer, the first electrode and the second electrode are both stripe electrodes, and an orthographic projection of the first electrode on the first substrate is staggered from an orthographic projection of the second electrode on the first substrate.

9. The privacy film of claim 8, wherein in the first mode, the pre-tilt angle is an angle between a long axis of liquid crystal molecules in the liquid crystal layer and a normal direction of the first substrate, and the pre-tilt angle is greater than zero degrees and less than or equal to 15 degrees.

10. A display device, comprising:

the privacy film of any one of claims 1-9;

a first polarizer;

a second polarizer;

the display panel is arranged between the first polaroid and the second polaroid;

the peep-proof film is arranged on one side, far away from the display panel, of the first polarizer.

11. The display device according to claim 10, further comprising:

a collimated light source;

the light guide plate is arranged on one side, far away from the display panel, of the peep-proof film, and the collimated light source is arranged on one side face of the light guide plate.

12. The display device according to claim 10, further comprising:

a backlight light source;

the light guide plate is arranged on one side, far away from the display panel, of the peep-proof film, the backlight source is arranged on one side face of the light guide plate, and a collimation film is arranged between the backlight source and the light guide plate.

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