A display panel

Abstract

The present invention provides a display panel, comprising: a display screen; a first optical adhesive layer, arranged on one side of the display screen; a one-way perspective functional layer, arranged on the side of the first optical adhesive layer away from the display screen; a second optical adhesive layer, arranged on the surface of the one-way perspective functional layer away from the display screen; wherein a black material is added to the second optical adhesive layer. The arrangement of the first optical adhesive layer, the one-way perspective functional layer, and the second optical adhesive layer in the display panel provided by the present invention enables the display panel to still have the function of a polarizing layer without including a polarizing layer commonly used in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of display, and in particular to a display panel, and in particular to an OLED display panel. Background Art

[0002] Organic electroluminescent display devices (OLED) have gradually become the mainstream technology in the display field with their unique advantages such as low power consumption, high saturation, fast response time and wide viewing angle. In the future, they will have broad application space in automotive, mobile phones, tablets, computers and TV products.

[0003] The polarizing layer (POL) is an important component of the organic electroluminescent display device, which can control the polarization direction of the transmitted light. Usually, the polarizing layer is composed of multiple laminated structures such as PVA layer (polyvinyl alcohol), TAC layer (triacetyl cellulose), PSA layer (adhesive layer), etc. The process is complicated. In some high-temperature and high-humidity bending experiments, it is prone to failure risks, such as redness or iodine ion precipitation. And the existing polarizing layer (POL) has a low transmittance, which reduces the transmittance of the organic electroluminescent display device and is not conducive to display. In addition, the PSA layer has a poor gap filling ability, and its thickness is about 15um, which makes the scratch resistance of the laminate far different from the scratch resistance of the cover plate monomer. The polarizing layer (POL) has a negative effect on the scratch resistance of the entire laminate.

[0004] Therefore, it is necessary to develop a new type of display panel to overcome the problems of the polarizing layer in the display panel in the prior art being prone to failure, low transmittance, and poor scratch resistance. Summary of the invention

[0005] The main technical problem to be solved by the present application is that the polarizing layer in the existing display panel is prone to failure, has low transmittance and poor scratch resistance.

[0006] In order to solve the above technical problems, a technical solution adopted in the present application is: a display panel, comprising:

[0007] Display screen;

[0008] A first optical adhesive layer is disposed on one side of the display screen;

[0009] A one-way perspective functional layer is provided on a side of the first optical adhesive layer away from the display screen;

[0010] A second optical adhesive layer is disposed on a surface of the one-way perspective functional layer away from the display screen;

[0011] Wherein, the reflectivity of the second optical adhesive layer is less than or equal to 1%.

[0012] Preferably, black material is added into the second optical adhesive layer.

[0013] Preferably, the one-way perspective functional layer and the second optical adhesive layer are multiplexed into a polarizing layer;

[0014] Preferably, the one-way perspective functional layer is one-way perspective glass.

[0015] Preferably, the black material comprises: one or more of graphene, carbon nanotubes, polymer-modified graphene, polymer-modified carbon nanotubes, polydopamine, dopamine-modified graphene, and dopamine-modified carbon nanotubes.

[0016] More preferably, the mass percentage of the black material added to the second optical adhesive layer does not exceed 1%;

[0017] Preferably, the particle size of the black material is less than 300 nm.

[0018] More preferably, the transmittance of the second optical adhesive layer is 70% to 90%;

[0019] Preferably, the second optical adhesive layer is formed by thermal curing.

[0020] Preferably, the thickness of the one-way perspective glass is 20 μm to 30 μm.

[0021] Preferably, the thickness of the first optical adhesive layer is 50 μm to 80 μm;

[0022] Preferably, the first optical adhesive layer is a transparent optical adhesive layer.

[0023] Preferably, it also includes

[0024] A protective layer, disposed on a side of the second optical adhesive layer away from the display screen;

[0025] A third optical adhesive layer is disposed on a side of the protective layer away from the display screen;

[0026] A flexible material layer, disposed on a side of the third optical adhesive layer away from the display screen;

[0027] Preferably, the protective layer is a colorless polyimide layer;

[0028] Preferably, the third optical adhesive layer is a transparent optical adhesive layer;

[0029] Preferably, the flexible material layer is made of polyethylene terephthalate.

[0030] Preferably, the display screen is an OLED display screen.

[0031] Beneficial effect: A specific embodiment of the present application provides a display panel, comprising: a display screen; a first optical adhesive layer, disposed on one side of the display screen; a one-way perspective functional layer, disposed on a side of the first optical adhesive layer away from the display screen; a second optical adhesive layer, disposed on a surface of the one-way perspective functional layer away from the display screen; wherein a black material is added to the second optical adhesive layer. The arrangement of the first optical adhesive layer, the one-way perspective functional layer, and the second optical adhesive layer in the display panel provided by the specific embodiment of the present application enables the display panel to still have the function of a polarizing layer (POL) without including the polarizing layer (POL) commonly used in the prior art, and the arrangement of the first optical adhesive layer, the one-way perspective functional layer, and the second optical adhesive layer of the present application is not prone to failure, and improves the transmittance and scratch resistance of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0033] Figure 1 It is a structural schematic diagram of a display panel in the prior art;

[0034] Figure 2 is a schematic structural diagram of a polarizing layer of a display panel in the prior art;

[0035] Figure 3 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0036] Figure 4 It is a schematic diagram of the structure of a display screen in a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 are within the scope of protection of this application.

[0038] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. 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 limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0041] See also Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the structure of a display panel in the prior art. Figure 2 It is a schematic diagram of the structure of the polarizing layer of the display panel in the prior art.

[0042] See also Figure 1 The display panel provided by the prior art includes a screen body 91; a first pressure-sensitive adhesive layer 92, which is arranged on one side of the screen body 91; a polarizing layer 93, which is arranged on the side of the first pressure-sensitive adhesive layer 92 away from the screen body 91; a first adhesive layer 94, which is arranged on the surface of the polarizing layer 93 away from the screen body 91; a polyimide layer 95, which is arranged on the side of the first adhesive layer 94 away from the screen body 91; a second adhesive layer 96, which is arranged on the side of the polyimide layer 95 away from the screen body 91; and a PET layer, which is arranged on the side of the second adhesive layer 96 away from the screen body 91.

[0043] Among them, see Figure 2The polarizing layer 93 may include a filter 931, which is arranged on the side of the first pressure-sensitive adhesive layer 92 away from the screen body 91; a second pressure-sensitive adhesive layer 932, which is arranged on the side of the filter 931 away from the screen body 91; a PVA layer 933 is arranged on the side of the second pressure-sensitive adhesive layer 933 away from the screen body 91, and a TAC layer 934 is arranged on the side of the PVA layer away from the screen body 91.

[0044] Specifically, the screen body 91 includes a substrate, a device layer and an encapsulation layer. The substrate can be a flexible substrate or a rigid substrate. The device layer is arranged on the substrate and may include a plurality of thin film transistor devices and circuit wiring (not shown). The encapsulation layer is arranged on the side of the device layer away from the substrate and covers the device layer. The encapsulation layer may include multiple layers of inorganic and / or organic substances arranged in alternating layers, which are mainly used to prevent the corrosion of water, oxygen, etc. in the external environment to the light-emitting layer, thereby extending the service life of the light-emitting layer. The first pressure-sensitive adhesive layer 92 may be a PSA (acrylic pressure-sensitive adhesive) colloid. The PVA layer 934 may be made of polyvinyl alcohol, which contains iodine ions and is prone to iodine ion precipitation. The second pressure-sensitive adhesive layer 933 may be a PSA (acrylic pressure-sensitive adhesive) colloid. The TAC layer 934 is a triacetate cellulose film.

[0045] Since the existing commonly used polarizing layer POL has a complicated preparation process, high failure risk, and low transmittance, the transmittance of the OLED is reduced, which is not conducive to display. In addition, the polarizing layer 93 is used in combination with the first pressure-sensitive adhesive layer 92, and the thickness of the first pressure-sensitive adhesive layer 92 is about 15um. The surface of the monomer is uneven, and the first pressure-sensitive adhesive layer 92 has a poor gap filling ability, which makes the scratch resistance of the laminate far different from that of the cover monomer. The polarizing layer 93 has a negative effect on the scratch resistance of the entire laminate. Therefore, it is necessary to improve the existing display panel to improve the above problems.

[0046] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0047] See also Figure 3 and Figure 4 , Figure 3 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application, Figure 4 It is a schematic diagram of the structure of a display screen in a display panel provided in an embodiment of the present application.

[0048] See also Figure 3 The display panel 100 provided in the embodiment of the present application includes a display screen 10; a first optical adhesive layer 20, which is arranged on one side of the display screen 10; a one-way perspective functional layer 30, which is arranged on the side of the first optical adhesive layer 20 away from the display screen 10; a second optical adhesive layer 40, which is arranged on the surface of the one-way perspective functional layer 30 away from the display screen 10; wherein the reflectivity of the second optical adhesive layer 40 should be less than or equal to 1%, specifically, a black material 41 is added to the second optical adhesive layer 40.

[0049] Specifically, in some specific embodiments, the display screen 10 may be an OLED display screen. Figure 4 The display screen 10 provided in the embodiment of the present application may include a substrate layer 11, a device layer 12 and an encapsulation layer 13. The substrate layer 11 may be a flexible substrate or a rigid substrate, which is not specifically limited in the present application. The flexible substrate may be made of polyimide, polyethersulfone, polycarbonate or polyethylene terephthalate, but is not limited thereto. The rigid substrate may be made of glass, but is not limited thereto. The device layer 12 is disposed on the substrate layer 11 and may include a number of thin film transistor devices and circuit wiring. In the present embodiment, the device layer 12 may include an active layer 120, a first insulating layer 121, a gate layer 122, a second insulating layer 123, a source and drain metal layer 124, a flat layer 125, an anode layer 126, a pixel definition layer 127, an organic light emitting layer 128, and a cathode layer 129. The active layer 120 includes a source portion, a drain portion, and a channel portion disposed between the source portion and the drain portion. The encapsulation layer 13 is arranged on the side of the device layer 12 away from the substrate layer 11, and covers the device layer 12. The encapsulation layer 13 may include multiple layers of inorganic and / or organic materials alternately stacked, mainly used to prevent the erosion of water, oxygen, etc. in the external environment to the light-emitting layer, thereby extending the service life of the light-emitting layer. The encapsulation layer 13 may be one or more of inorganic materials such as silicon oxide, silicon nitride, silicon oxynitride, etc., but is not limited thereto. The inorganic layer in the encapsulation layer 13 may be deposited on the cathode layer 129 by a deposition process such as chemical vapor deposition (CVD), physical vapor deposition (PVD), or atomic layer deposition (ALD). The organic layer in the encapsulation layer 13 may include one or more of epoxy and acrylic systems, and may be coated on the inorganic layer in the encapsulation layer 13 by one of a coating process such as ink jet printing (IJP) and spraying.

[0050] Specifically, the encapsulation layer 13 of the present application is bonded to the one-way perspective functional layer 30 through the first optical adhesive layer 20. The first optical adhesive layer 20 is a transparent optical adhesive layer. Specifically, the first optical adhesive layer 20 adopts OCA (Optically Clear Adhesive) optical adhesive, which has good discontinuity filling ability, so that the laminate has better flatness, and plays a positive role in improving scratch resistance. In order to ensure that the first optical adhesive layer 20 has good discontinuity filling ability, the thickness of the first optical adhesive layer 20 is required to be 50μm to 80μm. In some specific embodiments, the thickness of the first optical adhesive layer 20 can be 50μm, 60μm, 70μm or 80μm, and can also be other thicknesses, such as 65μm. Furthermore, in a specific embodiment of the present application, the first optical adhesive layer 20 is formed by thermal curing, and the resin monomer forming the first optical adhesive layer 20 can fully react to avoid incomplete reaction caused by photopolymerization. Furthermore, the first optical adhesive layer 20 of the specific embodiment of the present application has good recovery, which is above 85%, and has excellent high temperature resistance. Under the conditions of temperature of 85°C and humidity of 85RH%, the first optical adhesive layer 20 can still maintain 95% of the original efficiency after 1000 hours.

[0051] In the specific embodiment of the present application, the reflective surface of the one-way perspective functional layer 30 faces the side away from the display screen 10, and the one-way perspective functional layer 30 has a very high reflectance ratio for visible light. In the present application, the one-way perspective functional layer 30 is used as the main functional layer of the polarizing layer, so that the display panel 100 has a single directionality of light transmission. When the display panel 100 is in the off state, the external brightness is high, and visible light cannot pass through the side of the one-way perspective functional layer 30 away from the display screen 10, and enter the side of the one-way perspective functional layer 30 close to the display screen 10, and the one-way perspective functional layer 30 has an excellent integrated black effect; when the display panel 100 is in the bright screen, the display brightness is greater than the external brightness, and the light emitted by the light-emitting element passes through the side of the one-way perspective functional layer 30 close to the display screen 10, and enters the side of the one-way perspective functional layer 30 away from the display screen 10, and the overall display brightness is improved.

[0052] Specifically, in some specific embodiments, the one-way perspective functional layer 30 of the present application is a one-way perspective glass. The one-way perspective glass has good supporting performance, and its setting improves the flatness of the laminated layers of the display panel 100. In order to improve the flatness of the laminated layers of the display panel 100 without affecting the bending performance of the laminated layers, the specific embodiments of the present application have certain requirements on the thickness of the one-way perspective functional layer 30. Specifically, the thickness of the one-way perspective functional layer 30 of the specific embodiment of the present application is more suitable in the range of 20μm to 30μm. The thickness can be 20μm, 23μm, 25μm, 28μm or 30μm, or it can also be other thicknesses, such as 27μm.

[0053] In some specific embodiments, by disposing the second optical adhesive layer 40 on the surface of the one-way perspective functional layer 30 away from the display screen 10, the reflectivity of the second optical adhesive layer 40 should be less than or equal to 1%, so that the second optical adhesive layer 40 has a good anti-reflection effect. The refractive index of the second optical adhesive layer 40 can be 0.2%, 0.5%, 0.8% or 1%, or other refractive indexes, such as 0.65%.

[0054] In a specific embodiment of the present application, a second optical adhesive layer 40 is provided on a surface of the one-way perspective functional layer 30 away from the display screen 10, and a black material 41 is added to the second optical adhesive layer 40, so that the second optical adhesive layer 40 is a black adhesive layer, and the second optical adhesive layer 40 has excellent anti-ultraviolet and anti-reflection effects. The second optical adhesive layer 40 is combined with the first optical adhesive layer 20 and the one-way perspective functional layer 30 to further enhance the unidirectional directionality of light transmission of the one-way perspective functional layer 30, so that the display panel 100 still has the unidirectional directionality of light transmission of the polarizing layer (POL) without including the polarizing layer (POL) commonly used in the prior art.

[0055] Specifically, the black material 41 in the second optical adhesive layer 40 in the specific embodiment of the present application is required to have excellent anti-ultraviolet and anti-reflection effects. The black material 41 is a material with extremely low reflectivity, has excellent ultraviolet barrier effect in the full band, blocks ultraviolet rays well, and improves the light aging resistance of the screen. In some specific embodiments, the black material 41 set in the second optical adhesive layer 40 can be: graphene, carbon nanotubes, polymer-modified graphene, polymer-modified carbon nanotubes, polydopamine, dopamine-modified graphene, and dopamine-modified carbon nanotubes. One or more. Further, in the specific embodiment of the present application, the particle size of each of the above materials can be less than or equal to 300nm, so that the black material 41 can be evenly and fully filled in the second optical adhesive layer 40, and the exudation rate of the black material 41 in the second optical adhesive layer 40 is reduced. For example, the average particle size of the black material 41 can be 100nm, 150nm, 200nm, 250nm or 300nm, or it can also be other average particle sizes, such as 270nm.

[0056] In order to ensure the anti-reflection and anti-ultraviolet performance of the second optical adhesive layer 40 without losing the display effect, the present application achieves the above purpose by adjusting the addition ratio of the black material 41 in the second optical adhesive layer 40. Specifically, the present application adjusts the addition mass percentage of the black material 41 in the second optical adhesive layer 40 to not more than 1%, so that the transmittance of the second optical adhesive layer 40 is superimposed to 70% to 90%, thereby ensuring the display effect. Furthermore, in a specific embodiment of the present application, the addition mass percentage of the black material 41 in the second optical adhesive layer 40 can be 0.5%, 0.75% or 1%, or other addition mass percentages, such as 0.6%.

[0057] Specifically, the main adhesive layer of the second optical adhesive layer 40 in the specific embodiment of the present application adopts OCA (Optically Clear Adhesive) optical adhesive, which has good discontinuity filling ability, so that the laminate has better flatness. The combination of the one-way perspective functional layer 30 and the second optical adhesive layer 40 can give the laminate better flatness, increase the scratch resistance of the laminate, and play a positive role in improving the scratch resistance. In order to ensure that the second optical adhesive layer 40 has a good discontinuity filling ability, the thickness of the second optical adhesive layer 40 is required to be 50μm to 80μm. In some specific embodiments, the thickness of the second optical adhesive layer 40 can be 50μm, 60μm, 70μm or 80μm, and can also be other thicknesses, such as 65μm. Furthermore, in the specific embodiment of the present application, the second optical adhesive layer 40 is formed by thermal curing. In the process of forming the second optical adhesive layer 40 by thermal curing, the resin monomer forming the second optical adhesive layer 40 can fully react, avoiding incomplete reaction caused by photopolymerization, thereby avoiding the problem of lamination peeling caused by insufficient firmness of the bonding force between the second optical adhesive layer 40 and the one-way perspective functional layer 30. Further, the second optical adhesive layer 40 of the specific embodiment of the present application has good recovery, which is above 85%; and has good high temperature resistance. Under the high temperature and high humidity test conditions of 85°C and 85RH%, the second optical adhesive layer 40 of the embodiment of the present application can still maintain 95% of the original efficiency after 1000 hours, ensuring that the second optical adhesive layer 40 still has a strong bonding force with the one-way perspective functional layer 30 under high temperature and high humidity conditions, ensuring the firmness of the bonding force between the laminations, and avoiding the problem of lamination peeling.

[0058] In the embodiment of the present application, the first optical adhesive layer 20, the one-way perspective functional layer 30 and the second optical adhesive layer 40 are reused as the polarizing layer, which replaces the polarizing layer (POL) commonly used in the prior art, and significantly reduces the number of stacked layers. On the one hand, the preparation cost of the polarizing layer is reduced, the transmittance of the display panel is increased, and the display brightness of the OLED is improved. On the other hand, the reduction in the number of stacked layers of the polarizing layer simplifies the preparation process of the polarizing layer, and also reduces the problem of peeling of the functional layers that are enlarged due to too many stacked layers. At the same time, it also reduces the possibility of failure of the polarizing layers commonly used on the market, and reduces the adverse effects of the polarizing layers commonly used on the market on scratch resistance. Furthermore, since the first optical adhesive layer 20 and the second optical adhesive layer 40 have good recovery and high temperature resistance, the adhesion between the first optical adhesive layer 20 and the one-way perspective functional layer 30, and / or the second optical adhesive layer 40 and the one-way perspective functional layer 30 is greater than 1kgf / in (kilogram-force / inch), so that the encapsulation layer 13, the first optical adhesive layer 20, the one-way perspective functional layer 30, the second optical adhesive layer 40, and the protective layer 50 in the specific embodiment of the present application are greatly reduced in the occurrence of peeling after bending at high temperature and high humidity.

[0059] The display panel 100 of the specific embodiment of the present application may further include a protective layer 50, which is disposed on the side of the second optical adhesive layer 40 away from the display screen 10; in some specific embodiments, the protective layer 50 is made of polyimide (CPI) material to form a protective layer for the first optical adhesive layer 20, the one-way perspective functional layer 30 and the second optical adhesive layer 40. Furthermore, the protective layer 50 is a colorless polyimide layer.

[0060] In a specific embodiment of the present application, the display panel 100 may further include a third optical adhesive layer 60, which is disposed on a side of the protective layer 50 away from the display screen 10; in some specific embodiments, the third optical adhesive layer 60 uses OCA (Optically Clear Adhesive) optical adhesive, which has a good discontinuity filling ability, so that the laminate has a better flatness, and plays a positive role in improving scratch resistance. Further, the third optical adhesive layer 60 may be a transparent optical adhesive layer. In order to ensure that the third optical adhesive layer 60 has a good discontinuity filling ability, there are certain requirements for the thickness of the third optical adhesive layer 60. In some specific embodiments, the thickness of the third optical adhesive layer 60 may be 50μm to 80μm. In some specific embodiments, the thickness of the third optical adhesive layer 60 may be 50μm, 60μm, 70μm or 80μm, and may also be other thicknesses, such as 65μm. Further, in a specific embodiment of the present application, the third optical adhesive layer 60 is formed by thermal curing, and the resin monomer forming the third optical adhesive layer 60 can fully react to avoid incomplete reaction caused by photopolymerization. Furthermore, the third optical adhesive layer 60 of the specific embodiment of the present application has good recovery, which is above 85%, and has excellent high temperature resistance. Under the conditions of temperature of 85°C and humidity of 85RH%, the third optical adhesive layer 60 can still maintain 95% of the original efficiency after 1000 hours.

[0061] In a specific embodiment of the present application, the display panel 100 further includes a flexible material layer 70, which is disposed on a side of the third optical adhesive layer 60 away from the display screen 10 and is used as a cover material to protect the display panel 100. In some specific embodiments, the flexible material layer 70 may be made of polyethylene terephthalate (PET).

[0062] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0063] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0064] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: include: Display screen; A first optical adhesive layer is disposed on one side of the display screen; A one-way perspective functional layer is provided on a side of the first optical adhesive layer away from the display screen; A second optical adhesive layer is disposed on a surface of the one-way perspective functional layer away from the display screen; A protective layer, disposed on a side of the second optical adhesive layer away from the display screen; Wherein, black material is added into the second optical adhesive layer, and the reflectivity of the second optical adhesive layer is less than or equal to 1%; the one-way perspective functional layer and the second optical adhesive layer are multiplexed into a polarizing layer.

2. The display panel according to claim 1, characterized in that: The one-way perspective functional layer is one-way perspective glass.

3. The display panel according to claim 1, characterized in that: The black material includes: one or more of graphene, carbon nanotubes, polymer-modified graphene, polymer-modified carbon nanotubes, polydopamine, dopamine-modified graphene, and dopamine-modified carbon nanotubes.

4. The display panel according to claim 1, characterized in that: The mass percentage of the black material added to the second optical adhesive layer does not exceed 1%.

5. The display panel according to claim 4, characterized in that: The particle size of the black material is less than 300 nm.

6. The display panel according to claim 1, characterized in that: The transmittance of the second optical adhesive layer is 70% to 90%.

7. The display panel according to claim 6, characterized in that: The second optical adhesive layer is formed by thermal curing.

8. The display panel according to claim 1, characterized in that: The thickness of the one-way perspective functional layer is 20 μm to 30 μm.

9. The display panel according to claim 1, characterized in that: The thickness of the first optical adhesive layer is 50 μm to 80 μm.

10. The display panel according to claim 9, characterized in that: The first optical adhesive layer is a transparent optical adhesive layer.

11. The display panel according to claim 1, characterized in that: Also includes A third optical adhesive layer is disposed on a side of the protective layer away from the display screen; The flexible material layer is arranged on a side of the third optical adhesive layer away from the display screen.

12. The display panel according to claim 11, characterized in that: The protective layer is a colorless polyimide layer.

13. The display panel according to claim 11, characterized in that: The third optical adhesive layer is a transparent optical adhesive layer.

14. The display panel according to claim 11, characterized in that: The flexible material layer is made of polyethylene terephthalate.

15. The display panel according to claim 1, characterized in that: The display screen is an OLED display screen.

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