CN115356791A

CN115356791A - Cover plate, display panel and display device

Info

Publication number: CN115356791A
Application number: CN202210914768.4A
Authority: CN
Inventors: 许峰
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-18
Anticipated expiration: 2042-08-01
Also published as: CN115356791B

Abstract

The application discloses a cover plate, a display panel and a display device, wherein the cover plate comprises a base material layer, a hardening layer and an anti-reflection layer, and the hardening layer is arranged on the base material layer; the antireflection layer is arranged on one side, back to the base material layer, of the hardened layer, and the inside of the antireflection layer is filled with a repair material which has fluidity. In this application, when the sclerosis layer breaks and when producing the crackle under the exogenic action, the anti-reflecting layer of department of correspondence is synchronous or break afterwards, and inside repair material flows out from the position of breaking of anti-reflecting layer to in the crackle on sclerosis layer is filled to the situation, links the fracture department on sclerosis layer, reaches the restoration purpose, thereby helps prolonging the life and the quality of use of apron.

Description

Cover plate, display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a cover plate, a display panel and a display device.

Background

Nowadays, OLED (organic light-Emitting Diode) is considered as a new generation of display technology. The OLED flexible device enables the fabrication of display panels with a fixed curvature, even with repeated foldability. In order to ensure such flexibility, the OLED display panel generally uses a flexible material such as transparent polyimide instead of a glass material to prepare the cover plate.

Because the strength of the flexible material is much lower than that of the glass material, in the cover plate of the conventional OLED, a hardened layer (HG) is generally formed on the substrate to increase the strength of the cover plate, and an Anti-fingerprint layer (AF), an Anti-reflection layer (AR), an Anti-glare layer (AG), or the like is further formed on the HG layer to provide additional functions such as Anti-fingerprint, anti-reflection, and Anti-glare to the cover plate. However, in practical applications, when the display panel is subjected to external impacts, such as repeated bending, friction, and collision, the HG layer is prone to crack or even break on its surface, which reduces the quality of the display panel.

Disclosure of Invention

The embodiment of the application provides a cover plate, a display panel and a display device, and aims to solve the problems that an HG layer of a traditional cover plate is easy to crack under the action of an external force, and the use quality of the display panel is reduced.

The embodiment of the application provides a apron for display panel, the apron includes:

a substrate layer;

the hardening layer is arranged on one side of the base material layer; and the number of the first and second groups,

the antireflection layer is arranged on one side, back to the substrate layer, of the hardening layer, the repair material is filled in the antireflection layer, and the repair material has fluidity.

According to an embodiment of the present application, the repair material is provided in the same manner as a material of the hardened layer.

According to an embodiment of the application, the repair material is an adhesive material.

According to an embodiment of the present application, the antireflection layer includes a plurality of antireflection protrusions dispersedly arranged on the hardened layer;

at least one of the plurality of anti-reflection convex parts is a first convex part, a filling cavity is formed inside the first convex part, and the repair material is filled in the filling cavity.

According to an embodiment of the present application, the first convex portion includes a housing forming the filling cavity, and a material of the housing is a thermosetting resin material.

According to an embodiment of the present application, the filling cavities formed in different first protrusions are independent of each other.

According to an embodiment of the present application, the first convex portion includes at least two shell structures sleeved with each other from inside to outside, and the filling cavity is defined between every two adjacent shell structures.

According to an embodiment of the present application, the first convex portion is in a capsule shape, and the first convex portion is stacked on the hardened layer with at least two layers.

In addition, for realizing above-mentioned purpose, this application still provides a display panel, display panel includes display module assembly and apron, the apron is located display module assembly's demonstration side, the apron includes:

a substrate layer;

the hardening layer is arranged on one side of the base material layer; and (c) a second step of,

anti-reflecting layer is located the sclerosis layer is dorsad one side of substrate layer, the inside packing of anti-reflecting layer has repair materials, with anti-reflecting layer follows the sclerosis layer is cracked and when breaking, repair materials certainly the inside of anti-reflecting layer flows out, and fills extremely repair in the crackle of sclerosis layer.

In addition, for realizing above-mentioned purpose, this application still provides a display device, including display panel, display panel includes display module assembly and apron, the apron is located display module assembly's demonstration side, the apron includes:

a substrate layer;

the anti-reflection layer is arranged on one side, back to the base material layer, of the hardening layer, the repair material is filled in the anti-reflection layer, and the repair material has fluidity.

The beneficial effects of the embodiment of the application are as follows: in the application, the anti-reflection layer is arranged on the surface of one side, back to the substrate layer, of the hardening layer and can be basically kept synchronous with the stress condition of the hardening layer; under normal conditions, namely when the hardened layer is not cracked under the action of external force, the repair material is filled in the anti-reflection layer, so that the interference on the outer surface structure of the anti-reflection layer is avoided, the anti-reflection layer can achieve the purposes of weakening, scattering and even destroying the mirror reflection through the concave-convex outer surface structure, and the surface of the cover plate forms diffuse reflection, thereby being more beneficial to the display of the display panel; when the hardened layer is cracked and cracks are generated under the action of external force, the anti-reflection layer at the corresponding position is cracked synchronously or subsequently, the internal repair material flows out from the cracked part of the anti-reflection layer and is filled in the cracks of the hardened layer in a proper manner to connect the cracked part of the hardened layer, so that the repair purpose is achieved, and the service life and the use quality of the cover plate are prolonged.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

FIG. 1 is a schematic longitudinal sectional view of a cover plate provided in an embodiment of the present application, when a hardened layer is not broken;

FIG. 2 is a cross-sectional view of the first protrusion of FIG. 1;

FIG. 3 is a schematic longitudinal sectional view of the cover plate of FIG. 1 with the hardened layer broken;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

fig. 5 is a schematic cross-sectional view of a first protrusion according to another embodiment of the present application.

Detailed Description

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

The cover plate 1 provided by the application is applied to a display panel, and is particularly suitable for a flexible OLED display panel.

Referring to fig. 1 to 4, the cover plate 1 includes a substrate layer 10, a hardened layer 20, and an anti-reflection layer 30, wherein the hardened layer 20 is disposed on one side of the substrate layer 10; the antireflection layer 30 is arranged on one side of the hardening layer 20 opposite to the substrate layer 10, a repair material 311 is filled in the antireflection layer 30, and the repair material 311 has fluidity.

When the anti-reflection layer 30 is broken following the fracture of the hardened layer 20, the repair material 311 flows out from the interior of the anti-reflection layer 30 and fills the cracks of the hardened layer 20 for repair.

The beneficial effects of the embodiment of the application are as follows: in the application, the anti-reflection layer 30 is arranged on the surface of one side of the hardened layer 20, which is opposite to the substrate layer 10, and can be basically kept synchronous with the stress condition of the hardened layer 20; under normal conditions, that is, when the hardened layer 20 is not cracked due to external force, the repair material 311 is filled in the anti-reflection layer 30, so that interference on the outer surface structure of the anti-reflection layer 30 is avoided, and the anti-reflection layer 30 can achieve the purpose of weakening, scattering or even destroying the mirror reflection through the concave-convex outer surface structure, so that the surface of the cover plate 1 forms diffuse reflection, thereby being more conducive to display of the display panel; when the hardened layer 20 is cracked and cracked under the action of external force, the anti-reflection layer 30 at the corresponding position is cracked synchronously or subsequently, the internal repair material 311 flows out from the cracked part of the anti-reflection layer 30 and fills the crack of the hardened layer 20 in a homeotropic manner to connect the cracked part of the hardened layer 20, so that the repair purpose is achieved, and the service life and the use quality of the cover plate 1 are prolonged.

In this embodiment, the substrate layer 10 may be a flexible substrate or a rigid substrate with relatively weak strength. The material of the flexible substrate is generally a high molecular polymer, such as CPI (polyimide), PET (polyethylene terephthalate), and the like.

The substrate layer 10 is generally transparent to allow light to pass through. Based on this, the substrate layer 10 generally has the income light side and the play light side that are relative setting, wherein, the sclerosis layer 20 is laid on the play light side.

The hardened layer 20 may be disposed on the entire surface of the substrate layer 10, or may be disposed in a local area of the substrate layer 10 in a concentrated manner or in a dispersed manner in regions according to a predetermined design. The material, thickness, preparation technology, etc. of the hardened layer 20 are not limited in this application. In an embodiment, the hardening layer 20 may be made of epoxy resin, and has high hardness and good bending performance, and can be better used with the substrate layer 10.

It is understood that the hardened layer 20 may be cracked due to various reasons, such as repeated bending, particle friction at the surface, stretching in a certain direction, etc., presumably by external force. For the sake of understanding, the hardened layer 20 shown in fig. 3 of the present application is illustrated as an example of being broken by a bending force, and does not limit the way in which the hardened layer 20 is broken.

The anti-reflective layer 30 refers to a coating or film layer that reduces, disperses or even destroys the surface reflection, so that the surface forms a diffuse reflection. The AG anti-glare layer or the AR antireflection layer may be used, without limitation. Similarly to the hardened layer 20, the antireflection layer 30 may be arranged in a concentrated manner or in a dispersed manner in a partial region of the hardened layer 20 according to a predetermined design. The thickness, preparation process, etc. of the anti-reflection layer 30 are not limited in this application.

It should be noted that the substrate layer 10, the hardened layer 20, and the anti-reflection layer 30 do not limit the structure of the cover plate 1, and in other embodiments, the cover plate 1 may further include more film structures according to actual requirements, which is not described in detail.

The anti-reflection layer 30 is provided with a repair material 311, and the repair material 311 is generally fluid, i.e., has fluidity under the action of a certain external force. However, this does not constitute a limitation on the state of the repair material 311, and the repair material 311 may be in any one or more of a liquid state, a gas state, and a solid state, provided that it has a repair ability to the crack of the hardened layer 20.

The present application does not limit the material type of the repair material 311:

in one embodiment, the repair material 311 is made of the same material as the hardened layer 20. That is, the repair material 311 may be a material for preparing the hardened layer 20. For example, when the hardened layer 20 is made of the epoxy resin as described above, the repair material 311 may be the epoxy resin. It is understood that the repair material 311 may be directly the material (e.g., epoxy) of the hardened layer 20 itself, or a material capable of forming the material (e.g., epoxy) of the hardened layer 20.

In one embodiment, the repair material 311 may be provided as an adhesive material. The adhesive material is a material having viscosity and capable of performing an adhesive function in the cracks of the hardened layer 20. Specifically, an adhesive or the like which does not affect the light transmittance may be used.

In an embodiment, the repair material 311 may be a material capable of bonding the cracks of the hardened layer 20 after filling the cracks of the hardened layer 20 and after a physical or chemical reaction with the material of the hardened layer 20.

It should be noted that, after the repairing material 311 is filled into the crack of the hardened layer 20, the repairing material 311 may be configured to be connected with the inner wall surface of the crack under a natural condition or a specific condition, so as to achieve the purpose of slowing or even completely eliminating the continued fracture of the hardened layer 20. Wherein, the specific condition can be one or more of time condition, temperature condition, humidity condition, external force condition, ultrasonic condition, reactant condition and the like.

In view of the above, referring to fig. 1 to 4, in the present application, the anti-reflection layer 30 includes a plurality of anti-reflection protrusions 300 distributed on the hardened layer 20, and the anti-reflection protrusions 300 are also used to realize the anti-reflection function of the anti-reflection layer 30.

The specific expression form of the anti-reflection convex part 300 is not limited:

in one embodiment, the anti-reflection layer 30 may include a layer body on which the anti-reflection protrusions 300 are directly protrudingly disposed.

And/or in an embodiment, the anti-reflection layer 30 may include a layer body, and a plurality of concave structures are spaced apart from the layer body, and the anti-reflection convex portion 300 is defined between every two adjacent concave structures.

And/or in an embodiment the anti-reflection layer 30 may include a layer body having a plurality of capsules attached thereto, the capsules constituting the anti-reflection protrusions 300.

According to any of the above embodiments, at least one of the plurality of anti-reflective convex sections 300 is the first convex section 310. The inside of the first convex portion 310 forms a filling cavity 312, and the repair material 311 is filled in the filling cavity 312.

It is understood that all the anti-reflection protrusions 300 on the same cover plate 1 may be provided as the first protrusions 310; alternatively, all the anti-reflective convex parts 300 on the same cover plate 1 may be partially formed into the first convex part 310. When the first protrusions 310 are formed by all the anti-reflection protrusions 300 on the same cover plate 1, the arrangement of the first protrusions 310 on the layer body or the hardened layer 20 is not limited, and may be randomly distributed, or arrayed according to a preset arrangement, radially arranged, or intensively arranged at a position where the hardened layer 20 is easily cracked, or the like. The first convex portion 310 also has an antireflection function.

Specifically, the first protrusion 310 includes a housing 313, and the housing 313 forms the filling cavity 312. The specific material of the outer shell 313 is not limited, and may be, for example, a thermosetting resin material to wrap the repair material 311 in the filling cavity 312.

Furthermore, in the filling cavity 312 of the same first protrusion 310, the repair material 311 may be completely filled or partially filled; the repair material 311 may be a single material or a mixture of several materials.

The filling cavities 312 in the same boss may be provided in one or at least two. Wherein:

when at least two filling cavities 312 are provided in the same first protrusion 310, the filling cavities 312 may be provided independently of each other without communicating with each other, or at least some of the filling cavities 312 may communicate with each other.

When at least two filling cavities 312 are provided in the same first convex portion 310, the specific manner of representing each filling cavity 312 in the first convex portion 310 is not limited. For example, the filling cavities 312 may be arranged in a linear sequence in the same first protrusion 310; referring to fig. 5, in an embodiment, the first protrusion 310 includes at least two shell structures 314 sleeved with each other from inside to outside, and the filling cavity 312 is defined between every two adjacent shell structures 314.

Taking the first protrusion 310 as a capsule, i.e. a sphere, the first protrusion 310 may be configured to include an innermost core, one shell structure 314 surrounding the entire circumference of the outer surface of the core, another shell structure 314 surrounding the entire circumference of the outer surface of the first shell structure 314, and so on. The filling cavity 312 is defined between the inner wall of the innermost shell structure 314 and the outer wall of the core and every two adjacent shell structures 314 are spaced apart. All filled cavities 312 or partially filled cavities 312 within the same first protrusion 310 are filled with the repair material 311. The shell structure 314 located at the outermost layer is also referred to as the outer shell 313.

Thus, when the hardened layer 20 is broken by an external force, the first protrusions 310 may be broken sequentially from the outside to the inside in accordance with the strength of the external force. If the first protrusion 310 is not completely broken, the remaining portion of the first protrusion 310 still forms a protruding structure, and continues to perform the anti-reflection function.

The core body may be a solid structure, so as to ensure that the core body structure of the first protrusion 310 is always maintained under a certain external force, thereby avoiding the anti-reflection function of the first protrusion 310 from being invalid. Of course, the interior of the core may also define a fill cavity 312 filled with repair material 311.

When at least two filling cavities 312 are provided in the same first protrusion 310, each filling cavity 312 in the same first protrusion 310 may be filled with the same repair material 311, or at least part of the filling cavities 312 may be filled with different repair materials 311.

Further, based on any of the above-described embodiments, the filling cavities 312 formed in different first protrusions 310 may be arranged to communicate at least partially, or as shown in the drawing of the present embodiment, the filling cavities 312 formed in different first protrusions 310 may be independent of each other. As described above, when any of the first convex portions 310 is broken and flows out of the repair material 311, the remaining first convex portions 310 maintain integrity without being affected, and continue to exhibit the antireflection function.

Further, based on any of the embodiments described above, as mentioned above, the first convex portion 310 may be provided on the hardened layer 20 in a capsule shape. Specifically, the method comprises the following steps:

the shape of the first convex portion 310 in the capsule shape is not limited, and may be a sphere, an ellipsoid, an irregular shape, or the like.

The size of the first projection 310 in the capsule shape is not limited, and the particle size can be adjusted as needed.

The process for preparing the first convex portion 310 in the capsule shape is not limited. In one embodiment, the first protrusion 310 may be prepared by an in-situ polymerization method: the repair material 311 is, for example, epoxy resin that is the same as the material of the hardened layer 20, and constitutes a core; the material of the housing 313 is, for example, a thermosetting resin such as an amino resin. The prepolymer of the amino resin is used as a continuous phase, the epoxy resin is used as a disperse phase, and a proper dispersant is added to uniformly disperse the epoxy resin core in the prepolymer of the amino resin. Adding catalyst such as dilute hydrochloric acid, etc., and gradually polycondensing the prepolymer of amino resin to obtain water-insoluble polyamino resin with network cross-linked structure, which is gradually deposited on the surface of epoxy resin core to coat the epoxy resin core to form microcapsule. The particle size can be adjusted by controlling the process, mainly controlling the catalyst dosage and the polymerization time. When the anti-reflection layer 30 is an anti-glare layer, the reaction control capsule particle size is in the range of 300nm to 20um, preferably 1um to 5um, according to the requirement of anti-glare on the particle size.

When the preparation of the first protrusions 310 in the capsule shape is completed, the preparation process of the anti-reflection layer 30 is not limited. For example, when the anti-reflection layer 30 is an anti-glare layer, the capsule prepared as described above is deposited and then re-dispersed, and finally mixed with a solvent such as isopropyl alcohol or ethanol to prepare a desired coating suspension. Wherein, the deposition method can be a centrifugal separation method, and the redispersion method is briefly described as follows: weighing 95 parts of diluent, wherein the diluent can be pure solvent such as isopropanol, n-propanol ethyl acetate, n-butanol and the like or combination solvent thereof, adding a plurality of parts of the prepared anti-glare particles into the diluent, and dispersing at high speed for at least 0.5 hour at a rotating speed of more than 1000 by using a high-speed dispersion machine to obtain the coating suspension. Of course, the above process parameters can be adjusted according to actual conditions.

Next, the suspension obtained may be applied to the curing layer 20. The coating process can be completed by adopting processes such as spraying, curtain coating, spin coating, printing and the like, and the solvent is required to be heated to volatilize after the coating is completed.

Next, in an embodiment, when the first protrusion 310 is in a capsule shape, the first protrusion 310 is stacked on the hardened layer 20 to form at least two layers. Thus, not only the anti-reflection effect of the anti-reflection layer 30 is enhanced, but also when the first protrusions 310 at the same position are broken and repaired, a part of the first protrusions 310 still remain to continuously exert the anti-reflection effect; similarly, a sufficient amount of the repair material 311 is reserved in the same portion, so that a larger and deeper crack generated in the hardened layer 20 can be repaired more favorably, or the hardened layer 20 can be repaired many times in a repeatedly fractured region.

In addition, this application still provides a display panel, display panel includes display module assembly and as above apron 1, apron 1 locates the display side of display module assembly, and the two can bond fixedly through for example optical cement. The structure of the display module and the assembly scheme of the display module and the cover plate 1 can refer to the prior art, and are not described in detail.

It should be noted that, for the detailed structure of the cover plate 1 in the display panel, reference may be made to the above embodiment of the cover plate 1, and details are not described herein again; since the cover plate 1 is used in the display panel of the present application, embodiments of the display panel of the present application include all technical solutions of all embodiments of the cover plate 1, and the achieved technical effects are also completely the same, which are not described herein again.

The display panel may particularly be a flexible display panel.

In addition, the application also provides a display device which comprises the display panel. It should be noted that, the detailed structure of the display panel in the display device can refer to the above embodiment of the display panel, and is not described herein again; since the display panel is used in the display device of the present application, embodiments of the display device of the present application include all technical solutions of all embodiments of the display panel, and the achieved technical effects are also completely the same, and are not described herein again.

The specific representation form of the display device is not limited, and the display device can be a mobile phone, a computer, a television, a flat panel and other products.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The foregoing detailed description is directed to a cover plate, a display panel and a display device provided in the embodiments of the present application, and specific examples are applied herein to explain the principles and implementations of the present application, and the description of the foregoing embodiments is only used to help understand the technical solutions and their core ideas of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A cover plate for a display panel, the cover plate comprising:

a substrate layer;

2. The cover plate of claim 1, wherein the repair material is provided in the same material as the hardened layer.

3. The decking of claim 1, wherein the repair material is an adhesive material.

4. The cover plate of claim 1, wherein the antireflection layer includes a plurality of antireflection protrusions dispersedly arranged on the hardened layer;

at least one of the plurality of anti-reflection convex parts is a first convex part, a filling cavity is formed inside the first convex part, and the repairing material is filled in the filling cavity.

5. The decking of claim 4, wherein the first protrusion includes a shell forming the filled cavity, the shell being formed of a thermosetting resin material.

6. The decking of claim 4, wherein the fill cavities formed in different ones of the first lobes are independent of one another.

7. The decking of claim 4, wherein the first convex portion includes at least two shell structures nested one within the other from the inside to the outside, each adjacent two of the shell structures defining the filling cavity therebetween.

8. The cover sheet according to claim 4, wherein the first convex portion is in the form of a capsule, and the first convex portion is stacked on the hardened layer with at least two layers.

9. A display panel comprising a display module and the cover plate according to any one of claims 1 to 8, wherein the cover plate is disposed on the display side of the display module.

10. A display device characterized by comprising the display panel according to claim 9.