CN222146266U

CN222146266U - Peep-proof film and display panel thereof

Info

Publication number: CN222146266U
Application number: CN202420149967.5U
Authority: CN
Inventors: 杨朔; 韩尚; 张长栓
Original assignee: Suzhou Hongde Photoelectric Material Technology Co ltd
Current assignee: Suzhou Hongde Photoelectric Material Technology Co ltd
Priority date: 2024-01-22
Filing date: 2024-01-22
Publication date: 2024-12-10
Anticipated expiration: 2034-01-22

Abstract

The present invention discloses an anti-peep film and a display panel thereof, and relates to the field of display technology. The anti-peep film comprises: a substrate layer; a plurality of light-transmitting microstructures arranged at intervals on the substrate layer; a light-emitting layer arranged on the surface of the plurality of light-transmitting microstructures; and a light-shielding unit arranged between adjacent light-transmitting microstructures. The present invention solves the problem that the traditional louver grating design method limits the viewing angle by the light-proof area, resulting in low overall light transmittance, dark brightness and grayish black color, which affects the experience comfort.

Description

Peep-proof film and display panel thereof

Technical Field

The invention relates to the technical field of display, in particular to a peep-proof film and a display panel thereof.

Background

At present, a plurality of electronic information and various traditional information transfer bodies are changed to use electronic products such as mobile phones/computers and the like as media for transmission, and as the Internet is an open network environment, the risk of secret leakage exists, and confidentiality and security are very important problems for each user. Except that the security of the network environment is concerned, how the open office/entertainment/living environment guarantees the confidentiality and the security of the network environment, the peep-proof film is generated at the moment, the shutter is arranged in the screen layer as a peep-proof structure layer by utilizing the shutter principle, and the wide view angle of the screen is changed into a narrow view angle by controlling the light angle.

The patent number CN213618709U proposes a peep-proof membrane, which comprises a peep-proof base membrane and a surface treatment layer, wherein the surface treatment layer is positioned above the surface of the peep-proof base membrane, the peep-proof base membrane comprises a base material layer, a peep-proof structure layer is arranged on the base material layer, the peep-proof structure layer comprises a plurality of peep-proof units and light-transmitting units, the peep-proof units and the light-transmitting units are sequentially and alternately arranged to form a shutter structure, and the surface treatment layer is a transparent frosted membrane. By adopting the technical scheme, the phenomenon of moire and stringing caused by the adhesion of the peep-proof film and the display screen is eliminated, the light transmittance is improved by 3% -10%, the display screen is high in definition, the peep-proof effect is better, the preparation method is simple, easy to implement and control, and industrialization is convenient to realize.

Patent number CN203752629U proposes a peep-proof film, including the PET layer of bottom and the first transparent resin layer of setting on the PET layer evenly be provided with a plurality of row's packing units on the first transparent resin layer, the packing unit is including being located the bottom, the opaque packing portion that links to each other with first transparent resin layer and the second transparent resin portion that is located the top, the top of opaque packing portion is provided with the cavity, second transparent resin portion is pegged graft in the cavity. Compared with the traditional peep-proof film structure, the light transmittance in the visible area is increased, the visual effect is better, the user experience is more comfortable, and the peep-proof function outside the visible area is the same as the traditional peep-proof film effect.

However, the traditional shutter grating design mode limits the view angle by using the opaque area, so that the overall light transmittance is low, the brightness is dark and grey-black, and the experience comfort level is affected. In view of the above-mentioned problems, no effective solution has been proposed yet.

Disclosure of Invention

The invention aims to provide a peep-proof film and a display panel thereof, which are used for solving the problems in the prior art.

The technical scheme is that the peep-proof film comprises a substrate layer, a plurality of light-transmitting microstructures, a light-emitting layer and a light shielding unit, wherein the light-transmitting microstructures are arranged on the substrate layer at intervals, the light-emitting layer is arranged on the surfaces of the light-transmitting microstructures, the light shielding unit is arranged between the adjacent light-transmitting microstructures, and the light-emitting layer at least covers the tops of the light-transmitting microstructures.

Preferably, the light emitting layer covers the surface of the light transmitting microstructure.

Preferably, the thickness of the light emitting layer is 300nm or less.

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

Preferably, the interval between adjacent light-transmitting microstructures is 5-75um.

Preferably, the width of the upper bottom of the light-transmitting microstructure is 15-50um, the width of the lower bottom is 20-75um, and the height is 25-100um.

Preferably, the height of the light shielding unit is less than or equal to the height of the light-transmitting microstructure.

Preferably, the height of the light shielding unit is not less than 1.5um.

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

In order to solve the above-mentioned problems, according to another aspect of the present application, there is also provided a display panel including the privacy film as described above.

The embodiment of the application has the beneficial effects that the light-emitting layer is additionally arranged, and the light-emitting layer at least covers the top of the light-transmitting microstructure, so that the aim of increasing the light transmittance of the peep-proof film is fulfilled, the technical effect of improving the brightness of a screen is realized, and the technical problems that the conventional shutter grating design mode limits the view angle by using a light-tight area, the overall light transmittance is low, the brightness is dark and grey black, and the experience comfort is influenced are solved.

Drawings

FIG. 1 is a schematic view of a privacy film of the present invention;

fig. 2 is a schematic view of another peep-proof film structure according to the present invention;

FIG. 3 is a schematic view of another privacy film of the present invention;

FIG. 4 is a diagram showing the effect of the privacy film structure test of the present invention;

FIG. 5 is a schematic diagram of an embodiment of the present invention;

FIG. 6 is a schematic diagram of a seventh embodiment of the present invention;

FIG. 7 is a schematic view of an eighth construction of an embodiment of the present invention;

FIG. 8 is a schematic diagram of a ninth embodiment of the present invention;

FIG. 9 is a schematic view of a tenth construction of an embodiment of the present invention;

FIG. 10 is a schematic view of an eleventh embodiment of the present invention;

Fig. 11 is a schematic diagram showing a twelve structures of an embodiment of the present invention.

The reference numerals are 10, a substrate layer, 20, a light-transmitting microstructure, 30, a light-emitting layer, 40 and a shading unit.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, they may be fixedly connected, detachably connected, or of unitary construction, they may be mechanically or electrically connected, they may be directly connected, or they may be indirectly connected through intermediaries, or they may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1-3, the present application relates to a privacy film and a display panel thereof. The peep-proof film comprises a substrate layer 10, wherein the substrate layer 10 is a base material layer, and good fixing and supporting effects can be achieved. 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, and can achieve a flexible selection effect, so as to meet various use requirements.

The plurality of light-transmitting microstructures 20 are arranged on the substrate layer 10 at intervals, and good light-transmitting effects can be achieved by arranging the plurality of light-transmitting microstructures 20 on the upper surface of the substrate layer 10 at intervals, so that good screen display effects are ensured. Of course, the manner of forming the light-transmitting microstructure on the base material layer 10 includes, but is not limited to, thermo-compression molding, photolithography, and the like, and is not limited in the present application. Preferably, the light-transmitting microstructures 20 are uniformly spaced on the substrate layer 10, so that uniform light brightness can be ensured, and visual impression can be improved.

The light-emitting layer 30 is arranged on the surfaces of the light-transmitting microstructures 20, and the light-transmitting effect can be improved by arranging the light-emitting layer 30 on the surface of the light-transmitting microstructure 20, so that the overall brightness of the display screen is improved. Preferably, the luminescent layer 30 is a phosphor coating, and the phosphor is added to the surface of the privacy film to provide a local backlight effect when the phosphor emits light under light irradiation of a specific wavelength. Further, the light emitting layer 30 is a quantum dot or a phosphor. The quantum dots or fluorescent particles are uniformly dispersed on the surface of the light-transmitting microstructure 20 by spraying a solution of nano-scale (1-150 nm) quantum dots or fluorescent particles. May be a thin layer of light-emitting material, or a deposit of scattered light-emitting particles.

It should be understood that any organic or inorganic photoluminescent material layer may be used as the luminescent layer 30 in the present application, and the choice of luminescent material is not limited in the present application.

The light shielding units 40 are arranged between the adjacent light-transmitting microstructures 20, and good light absorption and shielding effects can be achieved by filling the light shielding units 40 between the adjacent light-transmitting microstructures 20, so that light can penetrate according to a preset angle, and good peeping prevention effects can be achieved. In the present application, the light shielding unit 40 is also an opaque unit. Of course, other components or structures having a light shielding function may be used in the present application, without limitation. Preferably, the light shielding means 40 may be a light absorption region of a light absorbing material such as carbon black or dye, and by using the above materials, a good light absorption effect can be ensured.

Wherein the light emitting layer 30 covers at least the top of the light transmissive microstructure 20. By arranging the light-emitting layer 30 at least on the top of the light-transmitting microstructure 20, light which should enter the opaque region and be absorbed can be absorbed, and the light-transmitting microstructure 20 can be enabled to return to the light-transmitting region to achieve the effect of improving the light transmittance by changing the advancing direction of the emitted light by the photoluminescence effect of the light-emitting layer 30 and further improving the overall brightness of the display screen. Further, the light emitting layer 30 covers the surface of the light transmitting microstructure 20. The light transmittance of the membrane can be increased, and the problem that the brightness of the screen is low when the peep-proof effect is displayed is solved.

It is to be appreciated that photoluminescence technology generally refers to a phenomenon and application in optoelectronic materials. Photoluminescence refers to the phenomenon whereby certain materials emit visible light when irradiated with 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 (fundamental energy level). The formation of light is closely related to the excited state, involving the formation and transition of the excited state.

Because the blue wavelength is shorter and the red wavelength is longer. In some cases, red light may more readily penetrate some materials, while blue light may be more readily absorbed. Therefore, the selection of a light source of a suitable wavelength helps to increase the penetration force, depending on the specific application scenario.

According to wave-particle dichotomy, a particle (such as a photon or an electron) can be considered not only as a particle, but also as a wave with volatility being refracted and reflected by the particle, wherein the refraction is that when the particle passes through the interface of a medium, the wave speed changes due to the difference of optical densities of the medium, resulting in a change of the propagation direction of the particle. This phenomenon is called refraction. According to the law of refraction, there is a relationship between the angle of incidence, the angle of emergence and the refractive index of the medium, similar to the refraction of light rays in classical optics.

Reflection-when the particles are reflected at the interface with the medium, a portion of the incident particles are reflected back to the original medium with equal angles of reflection and incidence. Reflection also complies with the law of reflection in classical optics.

By adopting the structure in the application, the problem that in the traditional peep-proof film design, the black microstructure coating is arranged in the opaque area to absorb the large light rays with the emergence angle, so that the visible angle is limited, and the peep-proof effect is achieved. However, such a peep-proof mechanism causes light loss, so that the brightness of the display screen with the peep-proof film is low.

The invention adopts the additionally arranged light-emitting layer 30, so that the light which originally enters the opaque region and is absorbed has the opportunity to re-emit light by the photoluminescence effect of the light-emitting layer 30 and simultaneously change the advancing direction of the emitted light, and the light returns to the light-transmitting region to achieve the effect of improving the light transmittance, thereby further improving the overall brightness of the display screen.

As shown in FIG. 4, the light transmittance of the central point of the peep-proof film structure is as high as 70%, which is obviously superior to that of common products in the market, and the light transmittance of the peep-proof film structure is rapidly reduced after about 30 degrees, so that the peep-proof film structure has excellent peep-proof angle viewing effect.

From the above description, it can be seen that the following technical effects are achieved:

In the embodiment of the application, the light emitting layer 30 is additionally arranged, and the light emitting layer 30 at least covers the top of the light-transmitting microstructure 20, so that the purpose of increasing the light transmittance of the peep-proof film is achieved, the technical effect of improving the brightness of the screen is realized, and the technical problems that the conventional shutter grating design mode limits the view angle by using the light-tight area, so that the overall light transmittance is low, the brightness is dark and grey black, and the experience comfort is influenced are solved.

Further, the interval between the adjacent light-transmitting microstructures 20 is 5-75um. It can be appreciated that by setting the intervals between the different 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 interval between the adjacent light-transmitting microstructures 20 is 5um, on the premise that the substrate layer 10 can be accommodated, i.e. on the premise of presetting the accommodating area, a plurality of light-transmitting microstructures 20 can be added, and meanwhile, the area of the corresponding light shielding units 40 can be reduced, so that the light-transmitting effect is improved. For example, when the interval between the adjacent light-transmitting microstructures 20 is 75um, on the premise that the substrate layer 10 can be accommodated, that is, on the premise of presetting the accommodating area, the number of the plurality of light-transmitting microstructures 20 can be correspondingly reduced, and meanwhile, the area of the corresponding light shielding unit 40 can be increased, so that the light-transmitting effect can be reduced, and therefore, the interval between the light-transmitting microstructures 20 can be correspondingly selected or adjusted according to the actual use requirement.

Further, the light-transmitting microstructure 20 has an upper bottom width of 15-50um, a lower bottom width of 20-75um, and a height of 25-100um. It will be appreciated that the effect of forming a plurality of specific light transmissive microstructures 20 can be achieved by a plurality of numerical alternatives, and thus can be adapted to a plurality of applications. Of course, the width of the upper bottom and the width of the lower bottom are synchronously increased, and the width of the upper bottom is always smaller than the width of the lower bottom, so that good peep-proof effect can be ensured.

Further, the interval between adjacent light-transmitting microstructures 20 is 7um, the width of the upper bottom of the light-transmitting microstructure 20 is 28um, the width of the lower bottom is 35.42um, and the height is 85um. It can be understood that by setting the microstructure in the above manner, the best light transmission effect can be obtained, and meanwhile, the fine peep-proof effect can be formed by matching with other components.

Further, the thickness of the light emitting layer 30 is 300nm or less. It can be understood that the light emitting effect can be ensured while also avoiding the occurrence of deterioration of the adhesion effect and the waste of the material due to the excessively thick light emitting layer 30.

Further, the thickness of the light emitting layer 30 is 50-250nm. It is understood that by setting the thickness of the light emitting layer 30 within a preset range, good optical performance can be ensured while good economic benefits can be achieved.

Further, the height of the light shielding unit 40 is less than or equal to the height of the light-transmitting microstructure 20. It can be appreciated that by defining the height of the light shielding unit 40, i.e. the opaque region, so that the height is less than or equal to the height of the light-transmitting microstructure 20, it is ensured that the transmittance of the privacy film is not excessively affected by the opaque region, thereby ensuring a certain light-emitting effect.

Further, the height of the light shielding unit 40 is not less than 1.5um. It is understood that by making the height of the light shielding unit 40 not smaller than 1.5um, a good light shielding effect can be ensured, thereby making the membrane have a peep preventing function.

Further, 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 can be appreciated that by setting the cross-sectional shape of the light-transmitting microstructure 20 to be a trapezoid, and adopting the shape of an isosceles right trapezoid, a good peep-preventing angle can be obtained.

This is further illustrated by the following examples:

Example 1

As shown in fig. 5, the interval between adjacent light-transmitting microstructures 20 is set to 7um, the width of the upper bottom of the light-transmitting microstructures 20 is 28um, the width of the lower bottom is 35.42um, the height of the light-transmitting microstructures 20 is 85um, and a light-emitting layer 30 is sprayed on the top of the light-transmitting microstructures 20, wherein the light-emitting layer 30 comprises 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 units 40 is 85um. At this time, the performance parameter of the peep-proof film was tested to be that the light transmittance was 70.1% and the viewing angle was ±30°.

Example 2

Embodiment 2 differs from embodiment 1 in that the thickness of the light emitting layer 30 is 1.5nm. At this time, the performance parameter of the peep-proof film is that the light transmittance is 60.88% and the viewing angle is + -30 deg.

Example 3

Embodiment 3 differs from embodiment 1 in that the thickness of the light emitting layer 30 is 100nm. At this time, the performance parameter of the privacy film was tested to be 70.41% light transmittance and 30 ° viewing angle.

Example 4

Embodiment 4 differs from embodiment 1 in that the thickness of the light emitting layer 30 is 150nm. At this time, the performance parameter of the peep-proof film is that the light transmittance is 70.99% and the viewing angle is + -30 degrees.

Example 5

Embodiment 5 differs from embodiment 1 in that the thickness of the light emitting layer 30 is 200nm. At this time, the performance parameter of the peep-proof film is that the light transmittance is 71.32% and the viewing angle is + -30 degrees.

Example 6

Embodiment 6 differs from embodiment 1 in that the thickness of the light emitting layer 30 is 300nm. At this time, the performance parameter of the peep-proof film was tested to be that the light transmittance was 72.24% and the viewing angle was ±30°.

Example 7

As shown in fig. 6, embodiment 7 is different from embodiment 1 in that the upper bottom width of the light-transmitting microstructure 20 is 15um, the lower bottom 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, the performance parameter of the peep-proof film was tested to be that the light transmittance was 51.5% and the viewing angle was + -28.5 °.

Example 8

As shown in fig. 7, embodiment 8 is different from embodiment 1 in that the upper bottom width of the light-transmitting microstructure 20 is 50um, the lower bottom 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, the performance parameter of the peep-proof film was tested to be 77.3% light transmittance and 48 ° viewing angle.

Example 9

As shown in fig. 8, embodiment 9 differs from embodiment 1 in that the interval between the adjacent light-transmitting microstructures 20 is set to 20um. At this time, the performance parameter of the peep-proof film was tested to be 71.88% light transmittance and 41 ° viewing angle.

Example 10

As shown in fig. 9, embodiment 10 differs from embodiment 1 in that the interval between adjacent light-transmitting microstructures 20 is set to 40um. At this time, the performance parameter of the peep-proof film is that the light transmittance is 74.37% and the viewing angle is + -48 degrees.

Example 11

As shown in fig. 10, embodiment 11 is different from embodiment 1 in that the interval between the adjacent light-transmitting microstructures 20 is set to 60um. At this time, the performance parameter of the peep-proof film was tested to be 77.23% light transmittance and 62 ° viewing angle.

Example 12

As shown in fig. 11, embodiment 12 is different from embodiment 1 in that the interval between the adjacent light-transmitting microstructures 20 is set to 75um. At this time, the performance parameter of the peep-proof film was tested to be that the light transmittance was 80.17% and the viewing angle was ±69°.

Comparative example 1

Comparative example 1 differs from example 1 in that the light-emitting layer thickness was 0. At this time, the performance parameter of the peep-proof film was tested to be 67.3% light transmittance and 30 ° viewing angle.

The results of each example and comparative example are shown in table 1:

from the above test results, it can be seen that:

1. As can be seen from examples 1 to 6, the light transmittance increases with the increase in the thickness of the light emitting layer under the condition that other parameters are unchanged.

2. It is understood from examples 1 and 7 to 8 that the light transmittance and the viewing angle are increased as the size of the light-transmitting microstructure is increased without changing other parameters.

3. It is understood from examples 1 and 9 to 12 that the light transmittance is increased and the viewing angle is increased with increasing spacing between adjacent light-transmitting microstructures under the condition of maintaining other parameters.

4. As can be seen from comparative example 1 and example 1, the penetration of the conventional peep-proof film is generally between 66% and 68%, and the addition of the nano quantum dot fluorescent powder coating in this example can increase the penetration rate by 2% to 3% while maintaining the peep-proof viewing angle, thereby improving the use brightness of the peep-proof film.

The invention also provides a preparation method of the peep-proof film, which is applied to the preparation of the peep-proof film, and comprises the following steps:

Step one, unreeling a substrate layer at an unreeling position of a forming machine, and manufacturing a formed light-transmitting microstructure on the upper surface of the substrate layer by using UV (ultraviolet) curing resin;

Uniformly spraying a solution containing nanoscale luminescent particles on the surface of the light-transmitting microstructure, and baking or drying the luminescent layer material to adhere the luminescent layer material to the surface of the light-transmitting microstructure so as to form a luminescent layer;

And thirdly, filling the opaque black glue layer material into the grooves between the adjacent light-transmitting microstructures, and performing light or heat curing to fix the light shielding unit material so as to form the light shielding units.

The method comprises the following steps of firstly, unreeling a PET substrate layer at an unreeling position of a forming machine, and unreeling, wherein a UV cured resin is used for manufacturing a formed light-transmitting microstructure on the upper surface of PET;

Secondly, uniformly spraying the solution containing the nanoscale luminous particles on the surface of the light-transmitting microstructure, and baking or drying the luminous layer material to adhere the luminous layer material on the surface of the light-transmitting microstructure;

And thirdly, filling the opaque black glue layer material into the grooves between the adjacent light-transmitting microstructures, and carrying out light or heat curing to fix the opaque region material.

The application also relates to a display panel comprising the peep-proof film.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solutions of the present invention within the scope of the technical concept of the present invention, and these equivalent changes all fall within the protection scope of the present invention.

Claims

1. A privacy film, characterized in that it comprises:

substrate layer;

A plurality of light-transmitting microstructures are disposed on the substrate layer at intervals;

a light-emitting layer disposed on the surfaces of some 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 anti-peep film according to claim 1 , wherein the luminous layer covers the surface of the light-transmitting microstructure.

3 . The anti-peep film according to claim 1 , wherein the thickness of the light-emitting layer is less than or equal to 300 nm.

4 . The anti-peep film according to claim 1 , wherein the thickness of the light-emitting layer is 50-250 nm.

5 . The anti-peep film according to claim 1 , wherein the spacing between adjacent light-transmitting microstructures is 5-75 um.

6. The anti-peep film according to claim 1, characterized in that the upper base width of the light-transmitting microstructure is 15-50 um, the lower base width is 20-75 um, and the height is 25-100 um.

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

8 . The anti-peep film according to claim 1 , wherein a height of the shading unit is not less than 1.5 um.

9 . The privacy film according to claim 1 , wherein 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 by comprising the anti-peep film according to any one of claims 1 to 9.