Peep-proof film and display panel thereof

Abstract

The utility model discloses a peep-proof film and a display panel thereof, and relates to the technical field of display. The peep-proof film comprises a base material layer, a first electrode layer and a second electrode layer, the light-transmitting microstructures are arranged on the base material layer at intervals; the light-emitting layer is arranged on the surfaces of the light-transmitting microstructures; and the shading units are arranged between the adjacent light-transmitting microstructures. According to the invention, the problems that the overall light transmittance is low, the brightness is dark and is gray black, and the experience comfort is influenced due to the fact that the visual angle is limited by a light-proof area in a traditional shutter grating design mode are solved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to an anti-peep film and a display panel thereof. Background Art

[0002] Nowadays, many electronic information and various traditional information transmission bodies have switched to electronic products such as mobile phones / computers as media transmission. Since the Internet is an open network environment, there is a risk of leaking secrets. Confidentiality and security are issues that every user attaches great importance to. In addition to the confidentiality and security of the network environment, how to ensure the confidentiality and security of the open office / entertainment / living environment, anti-peep film came into being at this time. Using the principle of blinds, the blinds are placed in the screen layer as an "anti-peep structure layer", and the wide viewing angle of the screen is changed to a narrow viewing angle by controlling the light angle.

[0003] Patent No. CN213618709U proposes an anti-peep film, which includes an anti-peep base film and a surface treatment layer, the surface treatment layer is located above the surface of the anti-peep base film; the anti-peep base film includes a substrate layer, the substrate layer is provided with an anti-peep structure layer, the anti-peep structure layer includes a plurality of anti-peep units and light-transmitting units, the anti-peep units and light-transmitting units are alternately arranged in sequence to form a shutter structure; the surface treatment layer is a transparent frosted film. By adopting the above technical solution, the moiré phenomenon and brushed pattern phenomenon generated after the anti-peep film is attached to the display screen are eliminated, and the light transmittance is increased by 3% to 10%, so that the display screen seen has high clarity and better anti-peep effect; the preparation method is simple, easy to implement and control, and convenient for industrialization.

[0004] Patent No. CN203752629U proposes an anti-peep film, including a bottom PET layer and a first transparent resin layer arranged on the PET layer, on which a plurality of rows of filling units are evenly arranged, and the filling unit includes an opaque filling part connected to the first transparent resin layer at the bottom and a second transparent resin part at the top, and a cavity is arranged on the top of the opaque filling part, and the second transparent resin part is inserted into the cavity. Compared with the traditional anti-peep film structure, the light transmittance in the visible area is increased, the visual effect is better, and the user experience is more comfortable, while the anti-peep function outside the visible area is the same as that of the traditional anti-peep film.

[0005] However, the traditional design of louver gratings limits the viewing angle by using opaque areas, resulting in low overall light transmittance, dim brightness and grayish black, which affects the experience comfort. Currently, no effective solution has been proposed for the above problems. Summary of the invention

[0006] Purpose of the invention: To provide an anti-peep film and a display panel thereof to solve the above-mentioned problems existing in the prior art.

[0007] Technical solution: A privacy film, comprising: a substrate layer; a plurality of light-transmitting microstructures spaced apart on the substrate layer; a luminous layer disposed on the surfaces of the plurality of light-transmitting microstructures; and a shading unit disposed between adjacent light-transmitting microstructures; wherein the luminous layer at least covers the top of the light-transmitting microstructure.

[0008] Preferably, the light-emitting layer covers the surface of the light-transmitting microstructure.

[0009] Preferably, the thickness of the light-emitting layer is less than or equal to 300 nm.

[0010] Preferably, the thickness of the light-emitting layer is 50-250 nm.

[0011] Preferably, the spacing between adjacent light-transmitting microstructures is 5-75 um.

[0012] Preferably, the light-transmitting microstructure has an upper base width of 15-50 um, a lower base width of 20-75 um, and a height of 25-100 um.

[0013] Preferably, the height of the shading unit is less than or equal to the height of the light-transmitting microstructure.

[0014] Preferably, the height of the shading unit is not less than 1.5 um.

[0015] Preferably, the cross-section of the light-transmitting microstructure is a trapezoid, and the trapezoid is an isosceles trapezoid, and is an isosceles regular trapezoid.

[0016] In order to solve the above problem, according to another aspect of the present application, a display panel is provided, comprising the anti-peep film as described above.

[0017] Beneficial effect: In the embodiment of the present application, a light-emitting layer is added, and the light-emitting layer at least covers the top of the light-transmitting microstructure, so as to achieve the purpose of increasing the light transmittance of the anti-peep film, thereby achieving the technical effect of increasing the brightness of the screen, and further solving the technical problem of the traditional blind grating design method, which limits the viewing angle with the non-light-transmitting area, resulting in low overall light transmittance, dark brightness and gray-black color, affecting the experience comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the privacy film of the present invention;

[0019] Figure 2 It is another schematic diagram of the structure of the privacy film of the present invention;

[0020] Figure 3 Schematic diagram of another anti-peep film structure of the present invention;

[0021] Figure 4 This is a test effect diagram of the anti-peep film structure of the present invention;

[0022] Figure 5 is a structural schematic diagram of embodiment 1 of the present invention;

[0023] Figure 6 is a structural schematic diagram of Embodiment 7 of the present invention;

[0024] Figure 7 is a schematic structural diagram of Embodiment 8 of the present invention;

[0025] Figure 8 is a structural schematic diagram of Embodiment 9 of the present invention;

[0026] Fig. 9 is a schematic structural diagram of Embodiment 10 of the present invention;

[0027] Fig.10 is a schematic structural diagram of an eleventh embodiment of the present invention;

[0028] Fig.11 It is a structural diagram of embodiment 12 of the present invention.

[0029] The reference numerals in the drawings are: 10, substrate layer; 20, light-transmitting microstructure; 30, light-emitting layer; 40, light-shielding unit. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] like Figure 1-3 As shown, the present application relates to an anti-peep film and a display panel thereof. The anti-peep film comprises: a substrate layer 10; the substrate layer 10 refers to a base material layer, which can achieve good fixing and supporting effects. Preferably, the material of the substrate layer 10 includes but is not limited to: one or more of PMMA, TAC, PET, COP, PP, TPU or PE; it can achieve a flexible selection effect, so as to meet a variety of usage requirements.

[0035] A plurality of light-transmitting microstructures 20 are arranged at intervals on the substrate layer 10; by arranging a plurality of light-transmitting microstructures 20 at intervals on the upper surface of the substrate layer 10, a good light-transmitting effect can be achieved, thereby ensuring a good screen display effect. Of course, the method of forming a light-transmitting microstructure on the substrate layer 10 includes but is not limited to: hot pressing molding, photolithography technology, etc., which are not limited in this application. Preferably, a plurality of light-transmitting microstructures 20 are evenly spaced on the substrate layer 10; this can ensure a uniform light brightness presentation effect, thereby improving the visual perception effect.

[0036] The luminescent layer 30 is arranged on the surface of some of the light-transmitting microstructures 20; by arranging the luminescent layer 30 on the surface of the light-transmitting microstructure 20, it is possible to improve the light penetration effect, thereby improving the overall brightness of the display screen. Preferably, the luminescent layer 30 is a phosphor coating; by adding a phosphor coating on the surface of the anti-peep film, the phosphor will emit light under the irradiation of light of a specific wavelength, providing a local backlight effect. Furthermore, the luminescent layer 30 is quantum dots or fluorescent powder. By adopting, including but not limited to: spraying nanoscale (1 to 150 nanometers) quantum dots or fluorescent particle solutions, the quantum dots or fluorescent particles are uniformly dispersed on the surface of the light-transmitting microstructure 20. It can be a thin luminescent layer, or scattered luminescent particle deposition.

[0037] It should be noted that both organic and inorganic photoluminescent material layers can be used as the light-emitting layer 30 in the present application, and the selection of the light-emitting material is not limited in the present application.

[0038] The shading unit 40 is arranged between adjacent light-transmitting microstructures 20; by filling the shading unit 40 between adjacent light-transmitting microstructures 20, good light absorption and shielding effects can be achieved, so that light can penetrate at a preset angle, thereby achieving a good anti-peeping effect. In the present application, the shading unit 40 is also a light-proof unit. Of course, other components or structures with shading functions can also be used in the present application without limitation. Preferably, the shading unit 40 can be a light absorption area of ​​a light-absorbing material such as carbon black or dye; by using the above materials, a good light absorption effect can be ensured.

[0039] The luminous layer 30 at least covers the top of the light-transmitting microstructure 20. By providing the luminous layer 30 at least on the top of the light-transmitting microstructure 20, the light that should have entered the opaque area and been absorbed can have the opportunity to re-emit light through the photoluminescence effect of the luminous layer 30 and change the forward direction of the radiated light, so that the light returns to the light-transmitting microstructure 20, that is, the light-transmitting area, to achieve the effect of improving light penetration, and further improve the overall brightness of the display screen. Furthermore, the luminous layer 30 covers the surface of the light-transmitting microstructure 20. It can also increase the light transmittance of the film and solve the problem of low screen brightness when the anti-peeping effect is presented.

[0040] It is important to know that photoluminescence technology generally refers to a phenomenon and application in optoelectronic materials. Photoluminescence refers to the phenomenon that when certain materials are exposed to light, they emit visible light. This phenomenon is widely used in optoelectronic devices such as LEDs (light-emitting diodes). An excited state refers to a state in which the energy level of an electron, nucleus, or overall system in an atom, molecule, or other system is higher than its ground state (basic energy level). The formation of light is closely related to the excited state, involving the formation and transition of the excited state.

[0041] Because blue light has a shorter wavelength and red light has a longer wavelength, in some cases, red light may penetrate some materials more easily, while blue light may be more easily absorbed. Therefore, according to the specific application scenario, choosing a light source with a suitable wavelength can help increase penetration.

[0042] According to the wave-particle duality, particles (such as photons or electrons) can be viewed not only as particles, but also as waves with wave properties through the refraction and reflection of particles; Refraction: When particles pass through the interface of a medium, due to the different optical densities of the medium, the wave speed will change, resulting in a change in the propagation direction of the particles. This phenomenon is called refraction. According to the law of refraction, there is a relationship between the incident angle, the exit angle and the refractive index of the medium, similar to the refraction of light in classical optics.

[0043] Reflection: When reflection occurs at the interface between particles and the medium, a portion of the incident particles is reflected back to the original medium, and the reflection angle is equal to the incident angle. Reflection also conforms to the law of reflection in classical optics.

[0044] By adopting the structure of the present application, it is possible to solve the problem in the traditional anti-peep film design that a black microstructure coating is set in the opaque area to absorb light with a large angle of incidence, thereby limiting the viewing angle and achieving an anti-peep effect. However, such an anti-peep mechanism causes light loss, so the brightness of the display screen with the anti-peep film will be low.

[0045] The present invention adopts the method of adding a luminous layer 30, so that the light that should have entered the opaque area and been absorbed has the opportunity to re-emit light through the photoluminescence effect of the luminous layer 30 and change the direction of the radiated light, so that the light returns to the translucent area to achieve the effect of improving light penetration, and further improve the overall brightness of the display screen.

[0046] like Figure 4 As shown, with the anti-peep film structure of the present application, the light transmittance at the center point is as high as 70%, which is significantly better than the common products on the market, and the light transmittance drops rapidly after 30 degrees to the left and right, showing an excellent anti-peep viewing effect.

[0047] From the above description, it can be seen that the present application achieves the following technical effects:

[0048] In the embodiment of the present application, a light-emitting layer 30 is added, and the light-emitting layer 30 at least covers the top of the light-transmitting microstructure 20, so as to achieve the purpose of increasing the light transmittance of the anti-peep film, thereby achieving the technical effect of increasing the brightness of the screen, and further solving the technical problem of the traditional blind grating design method that limits the viewing angle with the opaque area, resulting in low overall light transmittance, dark brightness and gray-black color, which affects the experience comfort.

[0049] Furthermore, the spacing between adjacent light-transmitting microstructures 20 is 5-75um. It is understandable that by setting different spacings between light-transmitting microstructures 20, the effect of adjusting the light transmittance can be achieved, thereby achieving the effect of adjusting the screen brightness. For example: when the spacing between adjacent light-transmitting microstructures 20 is 5um; then, under the premise that the substrate layer 10 can accommodate, that is, under the premise of the preset accommodating area, multiple light-transmitting microstructures 20 can be added, and the area of ​​the corresponding shading unit 40 will be reduced, thereby improving the light transmission effect. For another example: when the spacing between adjacent light-transmitting microstructures 20 is 75um; then, under the premise that the substrate layer 10 can accommodate, that is, under the premise of the preset accommodating area, the number of multiple light-transmitting microstructures 20 that can be accommodated will be reduced accordingly, and the area of ​​the corresponding shading unit 40 will increase, thereby reducing the light transmission effect; therefore, the spacing of the light-transmitting microstructures 20 can be selected or adjusted accordingly according to actual usage requirements.

[0050] Furthermore, the upper base width of the light-transmitting microstructure 20 is 15-50um, the lower base width is 20-75um, and the height is 25-100um. It is understandable that by selecting a plurality of values, it is possible to achieve the effect of forming a variety of specific light-transmitting microstructures 20, thereby being able to adapt to a variety of usage occasions. Of course, the upper base width and the lower base width increase synchronously, and the upper base width is always smaller than the lower base width; a good anti-peeping effect can be ensured.

[0051] Furthermore, the spacing between adjacent light-transmitting microstructures 20 is 7um, the upper base width of the light-transmitting microstructure 20 is 28um, the lower base width is 35.42um, and the height is 85um. It can be understood that by arranging the microstructure in the above manner, the best light-transmitting effect can be obtained, and at the same time, a good anti-peeping effect can be achieved in cooperation with other components.

[0052] Furthermore, the thickness of the light emitting layer 30 is less than or equal to 300 nm. It is understandable that while ensuring the light emitting effect, it can also avoid the situation where the light emitting layer 30 is too thick, resulting in poor adhesion and waste of materials.

[0053] Furthermore, the thickness of the light emitting layer 30 is 50-250 nm. It is understandable that by setting the thickness of the light emitting layer 30 within a preset range, good optical performance can be ensured while achieving good economic benefits.

[0054] Furthermore, the height of the shading unit 40 is less than or equal to the height of the light-transmitting microstructure 20. It is understandable that by limiting the height of the shading unit 40, i.e., the opaque area, so that its height is less than or equal to the height of the light-transmitting microstructure 20, it is possible to ensure that the light transmittance of the privacy film is not excessively affected by the opaque area, thereby ensuring a certain luminous effect as a prerequisite.

[0055] Furthermore, the height of the shading unit 40 is not less than 1.5 um. It is understandable that by setting the height of the shading unit 40 to be not less than 1.5 um, a good shading effect can be ensured, so that the film has a peek-proof function.

[0056] Furthermore, the cross section of the light-transmitting microstructure 20 is a trapezoid, and the trapezoid is an isosceles trapezoid and an isosceles regular trapezoid. It is understandable that by setting the cross section of the light-transmitting microstructure 20 to a trapezoid and adopting an isosceles regular trapezoid shape, a good anti-peeping angle can be obtained.

[0057] The specific examples are further described below:

[0058] Example 1

[0059] like Figure 5As shown, the spacing between adjacent light-transmitting microstructures 20 is set to 7um, the upper base width of the light-transmitting microstructure 20 is 28um, the lower base width is 35.42um, the height of the light-transmitting microstructure 20 is 85um, and the light-emitting layer 30 is sprayed on the top of the light-transmitting microstructure 20, the light-emitting layer 30 includes but is not limited to: quantum dots or fluorescent particle solution, the thickness of the light-emitting layer 30 is 50nm, and the height of the light-shielding unit 40 is 85um. At this time, after testing, the performance parameters of the anti-peep film are: light transmittance is 70.1%, and the viewing angle is ±30°.

[0060] Example 2

[0061] The difference between Example 2 and Example 1 is that the thickness of the light emitting layer 30 is 1.5 nm. At this time, after testing, the performance parameters of the anti-peep film are: light transmittance is 60.88%, and the viewing angle is ±30°.

[0062] Example 3

[0063] The difference between Example 3 and Example 1 is that the thickness of the light emitting layer 30 is 100 nm. At this time, after testing, the performance parameters of the anti-peep film are: light transmittance is 70.41%, and the viewing angle is ±30°.

[0064] Example 4

[0065] The difference between Example 4 and Example 1 is that the thickness of the light emitting layer 30 is 150 nm. At this time, after testing, the performance parameters of the privacy film are: light transmittance is 70.99%, and the viewing angle is ±30°.

[0066] Example 5

[0067] The difference between Example 5 and Example 1 is that the thickness of the light emitting layer 30 is 200 nm. At this time, after testing, the performance parameters of the anti-peep film are: light transmittance is 71.32%, and the viewing angle is ±30°.

[0068] Example 6

[0069] The difference between Example 6 and Example 1 is that the thickness of the light emitting layer 30 is 300 nm. At this time, after testing, the performance parameters of the privacy film are: light transmittance is 72.24%, and the viewing angle is ±30°.

[0070] Example 7

[0071] like Figure 6 As shown, the difference between Example 7 and Example 1 is that the upper base width of the light-transmitting microstructure 20 is 15um, the lower base width is 20um, the height of the light-transmitting microstructure 20 is 25um, and the height of the light-shielding unit 40 is 25um. At this time, after testing, the performance parameters of the anti-peep film are: light transmittance is 51.5%, and the viewing angle is ±28.5°.

[0072] Example 8

[0073] like Figure 7 As shown, the difference between Example 8 and Example 1 is that the upper base width of the light-transmitting microstructure 20 is 50um, the lower base width is 75um, the height of the light-transmitting microstructure 20 is 100um, and the height of the light-shielding unit 40 is 100um. At this time, after testing, the performance parameters of the anti-peep film are: light transmittance is 77.3%, and the viewing angle is ±48°.

[0074] Example 9

[0075] like Figure 8 As shown, the difference between Example 9 and Example 1 is that the spacing between adjacent light-transmitting microstructures 20 is set to 20 um. At this time, after testing, the performance parameters of the privacy film are: light transmittance is 71.88%, and the viewing angle is ±41°.

[0076] Example 10

[0077] like Fig. 9 As shown, the difference between Example 10 and Example 1 is that the spacing between adjacent light-transmitting microstructures 20 is set to 40 um. At this time, after testing, the performance parameters of the privacy film are: light transmittance is 74.37%, and the viewing angle is ±48°.

[0078] Embodiment 11

[0079] like Fig.10 As shown, the difference between Example 11 and Example 1 is that the spacing between adjacent light-transmitting microstructures 20 is set to 60 um. At this time, after testing, the performance parameters of the privacy film are: light transmittance is 77.23%, and the viewing angle is ±62°.

[0080] Example 12

[0081] like Fig.11 As shown, the difference between Example 12 and Example 1 is that the spacing between adjacent light-transmitting microstructures 20 is set to 75 um. At this time, after testing, the performance parameters of the privacy film are: light transmittance is 80.17%, and the viewing angle is ±69°.

[0082] Comparative Example 1

[0083] The difference between Comparative Example 1 and Example 1 is that the thickness of the light-emitting layer is 0. At this time, after testing, the performance parameters of the privacy film are: light transmittance is 67.3%, and the viewing angle is ±30°.

[0084] The results of various embodiments and comparative examples are shown in Table 1:

[0085]

[0086]

[0087] From the above test results we can see that:

[0088] 1. It can be seen from Examples 1-6 that within the scope of the present invention, under the premise that other parameters remain unchanged, as the thickness of the light-emitting layer continues to increase, the light transmittance continues to increase.

[0089] 2. It can be seen from Examples 1 and 7-8 that, under the premise that other parameters remain unchanged, as the size of the light-transmitting microstructure continues to increase, the light transmittance and viewing angle continue to increase.

[0090] 3. It can be seen from Examples 1 and 9-12 that, under the premise that other parameters remain unchanged, as the distance between adjacent light-transmitting microstructures continues to increase, the light transmittance continues to increase, and the viewing angle continues to increase.

[0091] 4. It can be seen from Comparative Example 1 and Example 1 that the penetration rate of conventional anti-peep films is generally between 66% and 68%. In this embodiment, adding a nano-quantum dot phosphor coating can increase the penetration rate by 2% to 3% while maintaining the anti-peep viewing angle, thereby improving the brightness of the anti-peep film.

[0092] The present invention also provides a method for preparing an anti-peep film, which is applied to prepare the anti-peep film as described above; the method comprises the following steps:

[0093] Step 1: Unwind the substrate layer at the unwinding position of the molding machine and unwind it, and use UV curing resin to form a light-transmitting microstructure on the upper surface of the substrate layer;

[0094] Step 2: evenly spraying a solution containing nanometer-scale luminescent particles on the surface of the light-transmitting microstructure, and baking or drying the luminescent layer material to make it adhere to the surface of the light-transmitting microstructure to form a luminescent layer;

[0095] Step 3: Fill the grooves between adjacent light-transmitting microstructures with opaque black glue layer material, and perform light or heat curing to fix the light-shielding unit material to form a light-shielding unit.

[0096] Specifically, the first step is to unwind the PET substrate layer onto the unwinding position of the molding machine and unwind it, and use UV curing resin to form a light-transmitting microstructure on the upper surface of the PET;

[0097] The second step is to evenly spray the solution containing nano-scale luminescent particles on the surface of the light-transmitting microstructure, and bake or dry the luminescent layer material to make it adhere to the surface of the light-transmitting microstructure;

[0098] The third step is to fill the opaque black glue layer material into the grooves between adjacent light-transmitting microstructures, and perform light or heat curing to fix the opaque area material.

[0099] The present application also relates to a display panel, comprising the anti-peep film as described above.

[0100] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. Privacy film, characterized in that: include: substrate layer; A plurality of light-transmitting microstructures are disposed at intervals on the substrate layer; A light-emitting layer is disposed on the surfaces of the light-transmitting microstructures; and A light shielding unit is disposed between adjacent light-transmitting microstructures; Wherein, the light-emitting layer at least covers the top of the light-transmitting microstructure.

2. The privacy film according to claim 1, characterized in that: The light-emitting layer covers the surface of the light-transmitting microstructure.

3. The privacy film according to claim 1, characterized in that: The thickness of the light-emitting layer is less than or equal to 300 nm.

4. The privacy film according to claim 1, characterized in that: The thickness of the light-emitting layer is 50-250 nm.

5. The privacy film according to claim 1, characterized in that: The spacing between adjacent light-transmitting microstructures is 5-75 um.

6. The privacy film according to claim 1, characterized in that: The light-transmitting microstructure has an upper base width of 15-50 um, a lower base width of 20-75 um, and a height of 25-100 um.

7. The privacy film according to claim 1, characterized in that: The height of the light-shielding unit is less than or equal to the height of the light-transmitting microstructure.

8. The privacy film according to claim 1, characterized in that: The height of the shading unit is not less than 1.5 um.

9. The privacy film according to claim 1, characterized in that: The cross section of the light-transmitting microstructure is a trapezoid, and the trapezoid is an isosceles trapezoid and an isosceles regular trapezoid.

10. A display panel, characterized in that The invention comprises the privacy film as claimed in any one of claims 1 to 9.

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