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CN212966869U - Cover plate structure, display panel and display device - Google Patents

️Tue Apr 13 2021

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

The inventors of the present application have conducted studies to find that, in the materials science, the outer layer is stretched and the inner layer is pressed when the material is bent, and the structure is less likely to be broken as the stretching force (or pressing force) applied when the material is bent is smaller.

To the whole apron structure that sets up the strengthening layer of face of stratum basale among the prior art, when taking place to buckle, the strengthening layer of apron structure can receive great tensile force (or extrusion force), and this greatly increased the strengthening layer by damaged risk, the apron structure is very probably destroyed after the buckle of less number of times, has shortened the life of apron structure.

The inventors of the present application have further found that the location where the strength layer breaks is generally located within the bending zone and towards the edge, which indicates that the zone is subjected to a greater tensile force during bending, and that after multiple bending cracks first appear, and are therefore more easily destroyed.

The application provides a apron structure, display panel and display device aims at solving prior art technical problem as above.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.

The embodiment of the present application provides a cover plate structure, as shown in fig. 1 to 2, including: a laminated

base layer

200 and reinforcing

layer

100; the cover structure has at least one

inflection region

300.

Within the

bend region

300, the dimension of the

reinforcing layer

100 in a first direction is less than the dimension of the

substrate layer

200 in the first direction, which is perpendicular to the bending direction.

As shown in fig. 1, in the

bending region

300, the dimension of the reinforcing

layer

100 in the first direction is smaller than the dimension of the

substrate layer

200 in the first direction, and may be that one side of the

substrate layer

200 in the bending direction is not completely covered by the reinforcing

layer

100, wherein the bending direction is perpendicular to the first direction.

Alternatively, as shown in fig. 2, in the

bending region

300, the size of the reinforcing

layer

100 in the first direction is smaller than the size of the

substrate layer

200 in the first direction, and both sides of the

substrate layer

200 in the bending direction may not be completely covered by the reinforcing

layer

100, and the sizes of the regions of the

substrate layer

200 in the bending direction, which are not covered by the reinforcing

layer

100, are different.

Optionally, in the

bending region

300, the size of the reinforcing

layer

100 in the first direction is smaller than the size of the

substrate layer

200 in the first direction, and it is also possible that both sides of the

substrate layer

200 in the bending direction are not completely covered by the reinforcing

layer

100, and the sizes of the regions of the

substrate layer

200 in the bending direction that are not covered by both sides are the same.

In any of the above embodiments, the size of the reinforcing

layer

100 in the

bending region

300 in the first direction is smaller than the size of the

substrate layer

200 in the first direction, when the cover plate structure is bent, the tensile force received at the edge of the

bending region

300 that is not covered by the reinforcing

layer

100 is significantly reduced compared with the prior art, the risk of fracture of the reinforcing

layer

200 in the

bending region

300 is effectively reduced, the cover plate structure can bear more times of bending, and the service life of the cover plate structure is prolonged.

The inventors of the present application have considered that the cover plate structure may have some

non-bending regions

400, and when bending occurs, the cover plate structure may be broken by the tensile force applied to at least a partial region of the edge of the

non-bending region

400 of the cover plate structure relative to the tensile force applied to the edge of the

bending region

300 of the cover plate structure, and for this reason, the present application provides one possible structural design for the

non-bending region

400 as follows:

as shown in fig. 3, the cover plate structure provided by the embodiment of the present application further has at least one

non-bending region

400;

within the

non-inflection region

400, a dimension of at least a first portion of the reinforcing

layer

100 in the first direction is less than a dimension of the

base layer

200 in the first direction;

the first portion is connected to the reinforcing

layer

100 within the

inflection zone

300.

Specifically, as shown in fig. 3, a size of the first non-bending region

reinforcing layer portion

401 in the first direction is smaller than a size of the

substrate layer

200 in the first direction, and meanwhile, a size of the first non-bending region

reinforcing layer portion

401 in the first direction is larger than a size of the reinforcing

layer

100 in the bending region in the first direction, wherein the first non-bending region

reinforcing layer portion

401 is connected to the reinforcing layer in the

bending region

300, so that the connection region between the

non-bending region

400 and the

bending region

300 of the cover plate structure has a certain film strength, and meanwhile, when the cover plate structure is bent, the tensile force of the connection region can be reduced, thereby achieving a beneficial effect of improving the fracture phenomenon when the cover plate structure is bent.

Optionally, as shown in fig. 4, a size of the non-bending region reinforcing layer

first portion

401 in the first direction is smaller than a size of the

substrate layer

200 in the first direction, and meanwhile, a size of the non-bending region reinforcing layer

first portion

401 in the first direction is smaller than a size of the reinforcing

layer

100 in the

bending region

300 in the first direction, so that when the cover plate structure is bent, a tensile force applied to a connection region between the

non-bending region

400 and the bending

region

300 is significantly reduced, and a beneficial effect of improving a fracture phenomenon when the cover plate structure is bent is achieved.

Alternatively, as shown in fig. 5, the dimension of the non-inflection region reinforcing layer

first portion

401 in the first direction is smaller than the dimension of the

substrate layer

200 in the first direction, while the dimension of the non-inflection region reinforcing layer

first portion

401 in the first direction may also be equal to the dimension of the reinforcing

layer

100 in the

inflection region

300 in the first direction. That is, the dimension of the first portion in the first direction is equal to the dimension of the reinforcing

layer

100 in the first direction in the

inflection zone

300.

Optionally, as shown in fig. 6, the bending

region

300 of the cover plate structure may further connect two

non-bending regions

400, and the structural design in the two

non-bending regions

400 may be the same, which is not described herein again.

In any of the above embodiments, since the film layer structure of the connection region between the bending

region

300 and the

non-bending region

400 is the same, when the cover plate structure is bent, the tensile force applied to the edge of the bending

region

300 can be more gradual. Therefore, any of the above embodiments can not only reduce the tensile force applied to the

bending area

300, but also further improve the technical problem of the occurrence of fracture at the edge of the

bending area

300 because the applied force is more gradual.

The inventor of the present application considers that when the cover plate structure is bent, the tensile force applied to the edge of the bending

region

300 is significantly greater than the tensile force applied to the edge of the

non-bending region

400, and the edge of the bending

region

300 is easily warped. To this end, the applicant also provides the following possible implementations for the cover plate structure:

in this embodiment, at least some of the edges of the reinforcing

layer

100 are parallel to the edges of the

substrate layer

200.

Specifically, as shown in fig. 6, at least a portion of the edges of the

strengthening layer

100 include: the edge of the

bending area

300 and the edge of the

first part

401 of the non-bending area reinforcing layer, at least part of the edge of the reinforcing

layer

100 is parallel to the edge of the

substrate layer

200, and the size of at least part of the reinforcing

layer

100 in the first direction is at least larger than the size of the reinforcing layer of the

bending area

300 along the first direction.

As shown in fig. 7, the edge of the reinforcing

layer

100 along the bending direction is completely etched away, and at least part of the edge of the reinforcing layer 100 (including the edge of the bending

region

300 and the edge of the

first portion

401 of the non-bending region reinforcing layer) is parallel to the edge of the

substrate layer

200, when the cover plate structure is bent, the tensile force applied to at least part of the edge of the reinforcing

layer

100 is reduced, and the tensile force applied to the edge of the bending

region

300 is also reduced, so that the problem of warping at the edge of the bending region is effectively improved.

Optionally, at least a portion of the edges of the

strengthening layer

100 are wavy lines.

Specifically, as shown in fig. 8, at least a part of the edge of the reinforcing

layer

100 is a wavy line, when the cover plate structure is bent, the wavy line edge can relieve the tensile force applied to at least a part of the edge of the reinforcing

layer

100, and the tensile force applied to the wavy line edge is smaller than that applied to the straight line edge, i.e., the tensile force applied to the edge of the

bending area

300 is also smaller, thereby achieving the technical effect of improving the easy occurrence of fracture at the edge of the bending area.

Optionally, at least a portion of the edges of the

strengthening layer

100 are arcs, the center of the arcs being outside of the substrate layer.

Specifically, as shown in FIG. 9, at least some of the edges of the reinforcing layer 100 (including the edges of the

inflection region

300 and the edges of the

first portion

401 of the reinforcing layer of the non-inflection region) are arcs having a center outside of the

substrate layer

200, i.e., the reinforcing

layer

100 at the area where the

non-inflection region

400 is connected to the

inflection region

300 has a decreasing dimension in the first direction. Therefore, when the cover plate structure is bent, the tensile force at the edge of the

bending area

300 is gradually reduced, so as to achieve the technical effect of improving the easy occurrence of fracture at the edge of the

bending area

300.

The inventor of the present application considers that, in some possible application scenarios, the cover plate structure has a lower requirement for reducing the buckling and warping phenomenon, and the strength of the cover plate is more required. To this end, the applicant has provided the following possible realisations for the cover plate structure:

optionally, the cover structure further comprises a

spreader layer

500;

the

ductile layer

500 is attached to the reinforced

layer

100 and covers at least a portion of the

substrate layer

200 not covered by the reinforced

layer

100; the

ductile layer

500 is made of the same material as the reinforced

layer

100, and the thickness of the

ductile layer

500 is smaller than that of the reinforced

layer

100.

Specifically, as shown in fig. 10, the

ductile layer

500 is connected to the reinforcing

layer

100 and covers the

substrate layer

200 that is partially not covered by the reinforcing

layer

100, i.e., in the

bending region

300 of the cover plate structure, the reinforcing

layer

500 also covers the

substrate layer

200 that is partially not covered by the reinforcing

layer

100. To simplify the manufacturing process, the

ductile layer

500 and the

strengthening layer

100 are made of the same material.

The thickness of the

extension layer

500 is smaller than that of the reinforced

layer

100, and the specific implementation method can be as follows: the entire design regions of the

tensile layer

500 and the reinforcing

layer

100 are formed on the

base layer

200, and then the regions of the tensile layer 600 are etched to be thinned, thereby obtaining the

tensile layer

500 having a lower strength than the reinforcing

layer

100. The thickness of the

extension layer

500 can be thinned by the etching method, so that the warping of the edge of the

bending area

300 of the cover plate structure can be reduced, a certain strength can be provided for the cover plate, and the requirement for higher strength of the cover plate in the actual application process is met.

It should be noted that the

aforementioned substrate layer

200 not covered by the reinforcing

layer

100 and covered by the reinforcing

layer

100 may be the whole area along the bending direction (as shown in fig. 10), or may be a partial area along the bending direction as shown in fig. 11, and the reinforcing

layer

100 in both cases can reduce the warpage of the cover plate and meet the requirement of higher strength of the cover plate in the practical application process.

In the actual application process of the cover plate structure, when the cover plate structure has a lower requirement for reducing the bending and warping phenomenon and has more requirements for the strength of the cover plate, the materials of the

extension layer

500 and the

strengthening layer

100 may be different. To this end, the applicant has also provided possible implementations for the extended layer of the cover plate structure:

in this embodiment, the cover structure further includes an

extension layer

500;

the

ductile layer

500 is attached to the reinforced

layer

100 and covers at least a portion of the

substrate layer

200 not covered by the reinforced

layer

100; the strength of the

extensible layer

500 is less than the strength of the reinforced

layer

100.

Specifically, as shown in fig. 12, the

extension layer

500 is connected to the reinforcing

layer

100 and covers a part of the

substrate layer

200 that is not covered by the reinforcing

layer

100, and the material of the

extension layer

500 may be different from that of the reinforcing

layer

100, for example, the strength of the

extension layer

500 is lower than that of the reinforcing

layer

100, so that the bending warpage of the cover plate structure can be reduced. In order to make the strength of the

base layer

200 in the area covered by the

extensible layer

500 meet the user requirement, the

extensible layer

500 may be disposed as shown in fig. 12, and the thickness of the

extensible layer

500 is greater than that of the reinforced

layer

100, so as to meet the requirement of higher strength of the cover plate in some application scenarios.

It should be noted that the

aforementioned substrate layer

200 not covered by the reinforcing

layer

100, which is covered by the reinforcing

layer

100, may be, as shown in fig. 10, the entire area of the

substrate layer

200 not covered by the reinforcing

layer

100 in the bending direction; the partial area of the

substrate layer

200 not covered by the reinforcing

layer

100 in the bending direction may be used as shown in fig. 11.

Alternatively, in the case where the

ductile layer

500 and the reinforcing

layer

100 are made of different materials, the thickness of the

ductile layer

500 is smaller than that of the reinforcing

layer

100, and the strength difference between the

ductile layer

500 and the reinforcing

layer

100 is further reinforced by thinning.

In particular, with reference to the description of fig. 10 and 11, the thickness of the

extensible layer

500 is less than the thickness of the reinforced

layer

100, and as with the possible implementations described above, the

aforementioned substrate layer

200, which is not covered by the reinforced

layer

100, and which is covered by the reinforced

layer

500 may be, as shown in fig. 10, the entire area of the

substrate layer

200, which is not covered by the reinforced

layer

100 in the bending direction; the partial area of the

substrate layer

200 not covered by the reinforcing

layer

100 in the bending direction may be used as shown in fig. 11. When the bending radius is smaller, the technical problem that the edge of the

bending area

300 of the cover plate structure is broken can be solved by the

extension layer

500 under the two conditions, and the firmness of the cover plate structure is improved.

The inventors also consider that in order to solve the technical problem of the occurrence of cracks at the edge of the bending

region

300 of the cover plate structure, the dimension of the reinforcing

layer

100 in the first direction is smaller than the dimension of the

substrate layer

200 in the first direction in the

bending region

300. That is, there is a

base layer

200 that is partially uncovered by the

strengthening layer

100 in the cover plate structure, and therefore, there may be a light leakage phenomenon in the

base layer

200 that is not covered by the

strengthening layer

100, for this reason, the applicant provides the following possible implementation manners for the

base layer

200 that is not covered by the

strengthening layer

100 in the cover plate structure:

in this embodiment, a light-shielding layer is provided in at least a partial region of the

base layer

200 not covered by the reinforcing

layer

100.

Specifically, the light shielding layer covers a partial area of the

substrate layer

200 covered by the

unreinforced layer

100, that is, the light shielding layer is a part of the cover plate structure, light in the cover plate structure can be confined within a specified range, and the light shielding layer plays a role in shielding, so that a possible light leakage phenomenon is reduced.

Optionally, at least a partial region of the

substrate layer

200 not covered by the

strengthening layer

200 is used to correspond to a light shielding layer of the display module.

In this case, the light shielding layer serves as a part of the display module, and does not have a shielding effect, but the light shielding layer corresponds to the light shielding layer of the display module, so that the light shielding effect can be indirectly achieved, and the problem of light leakage possibly existing in the cover plate structure is solved.

Based on the same inventive concept, the embodiment of the present application further provides a display panel, including: display module assembly and any one of the cover plate structures provided in the preceding embodiments.

The above-mentioned embodiment adopts the apron structure in the first aspect, and then reduces the tensile force that the display panel received when taking place to buckle, has improved display panel's stability. Meanwhile, since the light-shielding layer is provided in at least a partial region of the

base layer

200 not covered by the reinforcing

layer

100, the display panel having the above-described cover structure has a good display effect.

Optionally, the light shielding layer in the display module corresponds to at least a partial region of the cover plate structure where the

substrate layer

200 is not covered by the reinforcing

layer

100.

Based on the same inventive concept, the embodiment of the present application further provides a display device, including: any one of the cover plate structures and the display panel provided in the foregoing embodiments.

The principle of the cover plate structure adopted in the display device of this embodiment is the same as that of any one of the foregoing cover plate structures, and is not described herein again. The display device manufactured by adopting the cover plate structure also has the advantages of good display effect and high reliability.

By applying the embodiment of the application, at least the following beneficial effects can be realized:

1. the size of the reinforcing

layer

100 in the

bending region

300 in the first direction is smaller than that of the

substrate layer

200 in the first direction, so that compared with the prior art, the tensile force applied to the portion of the bending

region

300 which is easily damaged is significantly reduced, and the risk of fracture of the reinforcing

layer

100 in the

bending region

300 is effectively reduced;

2. the bending times of the cover plate structure are improved, and the service lives of the display panel and the display device are further prolonged;

3. the thickness of the cover plate structure edge

region reinforcing layer

100 can be realized by coating photosensitive adhesive, covering a base material with a mask plate and adopting a chemical vapor deposition method, the size of the cover plate structure edge region reinforcing layer in the first direction can be adjusted, and the compatibility of the product is improved;

4. since the light-shielding layer is provided in at least a part of the area of the

base layer

200 not covered by the reinforcing

layer

100, the risk of breakage of the reinforcing

layer

100 in the

bend area

300 is reduced, and a good display effect can be ensured.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.