Cover for display panel and display device

Abstract

A cover for a display panel comprises: a cover film (CL); a first adhesive layer (PSA1) located on the cover film (CL); a polarizer (PL) located on the side of the first adhesive layer (PSA1) away from the cover film (CL); a phase difference layer (LC) located on the side of the polarizer (PL) away from the first adhesive layer (PSA1); a second adhesive layer (PSA2) located on the side of the phase difference layer (LC) away from the polarizer (PL); and ultra-thin glass (UTG) and an opaque filler layer (BFL) located on the side of the second adhesive layer (PSA2) away from the phase difference layer (LC). The opaque filler layer (BFL) comprises an opaque material. The opaque filler layer abuts at least a portion of the periphery of the ultra-thin glass (UTG).

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a cover for a display panel and a display device. Background Art

[0002] A flexible display device is a bendable or deformable display device with a flexible display panel. Examples of flexible display devices include flexible organic light emitting diode (OLED) display devices, flexible electrophoretic display (EPD) devices, and flexible liquid crystal display (LCD) devices. As a new generation of display devices, flexible display devices are thinner and lighter, with high contrast, high responsiveness, and high brightness. It also provides full color and wide viewing angle. Flexible display devices are widely used in mobile phones, personal digital assistants (PDAs), digital cameras, onboard displays, notebook computers, wall-mounted TVs, and various military applications. Flexible display devices include flexible array substrates. The base substrate of the flexible array substrate can be made of a flexible material such as plastic. Summary of the invention

[0003] In one aspect, the present disclosure provides a cover for a display panel, comprising: a covering film; a first adhesive layer located on the covering film; a polarizer located on a side of the first adhesive layer away from the covering film; a phase difference layer located on a side of the polarizer away from the first adhesive layer; a second adhesive layer located on a side of the phase difference layer away from the polarizer; and ultra-thin glass and an opaque filler layer located on a side of the second adhesive layer away from the phase difference layer; wherein the opaque filler layer comprises an opaque material; and the opaque filler layer is adjacent to at least a portion of the periphery of the ultra-thin glass.

[0004] Optionally, the orthographic projection of the second adhesive layer on the plane containing the surface of the covering film covers the orthographic projection of the ultra-thin glass on the plane containing the surface of the covering film, and the orthographic projection of the second adhesive layer on the plane containing the surface of the covering film exceeds the orthographic projection of the ultra-thin glass on the plane containing the surface of the covering film by an edge width; and the orthographic projection of the opaque filler layer on the plane containing the surface of the covering film is at least partially within the edge width.

[0005] Optionally, a combination of the orthographic projection of the ultra-thin glass on the plane including the surface of the covering film and the orthographic projection of the opaque filler layer on the plane including the surface of the covering film substantially overlaps with the orthographic projection of the second adhesive layer on the plane including the surface of the covering film.

[0006] Optionally, a first thickness of the opaque filler layer is greater than or equal to a second thickness of the ultra-thin glass.

[0007] Optionally, the first thickness is greater than the second thickness; and the orthographic projection of the opaque filler layer partially overlaps with the orthographic projection of the ultra-thin glass.

[0008] Optionally, the first thickness is greater than the second thickness; and a difference between the first thickness and the second thickness is less than 50 μm.

[0009] Optionally, the thickness of the ultra-thin glass is in the range of 30 μm to 100 μm; and the ratio of the thickness of the opaque filler layer to the thickness of the ultra-thin glass is in the range of 2.5 to 3.5.

[0010] Optionally, the cover is bendable along a bending direction; and the absorption axis of the polarizer is substantially perpendicular to the bending direction.

[0011] Optionally, the polarizer is an iodine-based linear polarizer.

[0012] Optionally, the phase difference layer includes a half-wave plate and a quarter-wave plate.

[0013] Optionally, the total thickness of the cover is in the range of 50μm to 150μm; the thickness of the covering film is in the range of 50μm to 100μm; the thickness of the first adhesive layer is in the range of 0.1μm to 25μm; the thickness of the polarizer is in the range of 1μm to 15μm; the thickness of the phase difference layer is in the range of 0.05μm to 5μm; the thickness of the second adhesive layer is in the range of 3μm to 25μm; and the thickness of the ultra-thin glass is in the range of 30μm to 100μm.

[0014] In one aspect, the present disclosure provides a display device, comprising: a cover; and a display panel; wherein the cover comprises: a covering film; a first adhesive layer located on the covering film; a polarizer located on a side of the first adhesive layer away from the covering film; a phase difference layer located on a side of the polarizer away from the first adhesive layer; a second adhesive layer located on a side of the phase difference layer away from the polarizer; and ultra-thin glass and an opaque filler layer located on a side of the second adhesive layer away from the phase difference layer; wherein the opaque filler layer comprises an opaque material; and the opaque filler layer is adjacent to at least a portion of the periphery of the ultra-thin glass.

[0015] Optionally, the display device further includes a third adhesive layer between the ultra-thin glass and the display panel.

[0016] Optionally, the orthographic projection of the second adhesive layer on the plane containing the surface of the covering film covers the orthographic projection of the ultra-thin glass on the plane containing the surface of the covering film, and the orthographic projection of the second adhesive layer on the plane containing the surface of the covering film exceeds the orthographic projection of the ultra-thin glass on the plane containing the surface of the covering film by an edge width; and the orthographic projection of the opaque filler layer on the plane containing the surface of the covering film is at least partially within the edge width.

[0017] Optionally, a combination of the orthographic projection of the ultra-thin glass on the plane including the surface of the covering film and the orthographic projection of the opaque filler layer on the plane including the surface of the covering film substantially overlaps with the orthographic projection of the second adhesive layer on the plane including the surface of the covering film.

[0018] Optionally, a first thickness of the opaque filler layer is greater than or equal to a second thickness of the ultra-thin glass.

[0019] Optionally, the first thickness is greater than the second thickness; and the orthographic projection of the opaque filler layer partially overlaps with the orthographic projection of the ultra-thin glass.

[0020] Optionally, the first thickness is greater than the second thickness; and a difference between the first thickness and the second thickness is less than 50 μm.

[0021] Optionally, the thickness of the ultra-thin glass is in the range of 30 μm to 100 μm; and the ratio of the thickness of the opaque filler layer to the thickness of the ultra-thin glass is in the range of 2.5 to 3.5.

[0022] Optionally, the cover is bendable along a bending direction; and the absorption axis of the polarizer is substantially perpendicular to the bending direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] According to various disclosed embodiments, the following drawings are examples only for illustration purposes and are not intended to limit the scope of the present invention.

[0024] Figure 1 is a plan view of a cover for a display panel according to some embodiments of the present disclosure.

[0025] Figure 2 is along Figure 1 Cross-sectional view along line A-A'.

[0026] Figure 3 is a cross-sectional view of a cover for a display panel according to some embodiments of the present disclosure.

[0027] Figure 4is a cross-sectional view of a cover for a display panel according to some embodiments of the present disclosure.

[0028] Figure 5 is a cross-sectional view of a display device having a display panel according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0029] The present disclosure will now be described in more detail with reference to the following examples. It should be noted that the following description of some of the embodiments presented herein is for illustration and description purposes only. It is not intended to be exhaustive or limited to the precise form disclosed.

[0030] The present disclosure provides, in particular, a cover for a display panel and a display device, which substantially avoids one or more problems caused by the limitations and disadvantages of the prior art. In one aspect, the present disclosure provides a cover for a display panel. In some embodiments, the cover includes a cover for a display panel. In some embodiments, the cover for a display panel includes a cover film; a first adhesive layer, which is located on the cover film; a polarizer, which is located on the side of the first adhesive layer away from the cover film; the first adhesive layer bonds the cover film and the polarizer together; a phase difference layer, which is located on the side of the polarizer away from the first adhesive layer; a second adhesive layer, which is located on the side of the phase difference layer away from the polarizer; and ultra-thin glass and an opaque filler layer, which is located on the side of the second adhesive layer away from the phase difference layer, the second adhesive layer bonds the ultra-thin glass and the phase difference layer together, and bonds the opaque filler layer and the phase difference layer together. Optionally, the opaque filler layer includes an opaque material. Optionally, the opaque filler layer is adjacent to at least a portion of the periphery of the ultra-thin glass.

[0031] Figure 1 is a plan view of a cover for a display panel according to some embodiments of the present disclosure. Figure 2 is along Figure 1 A cross-sectional view of the line A-A' in FIG. Figure 1In some embodiments, the cover includes a cover film CL; a first adhesive layer PSA1 located on the cover film CL; a polarizer PL located on the side of the first adhesive layer PSA1 away from the cover film CL; a phase difference layer LC located on the side of the polarizer PL away from the first adhesive layer PSA1; a second adhesive layer PSA2 located on the side of the phase difference layer LC away from the polarizer PL; and an ultra-thin glass UTG and an opaque filler layer BFL located on the side of the second adhesive layer PSA2 away from the phase difference layer LC. Optionally, the first adhesive layer PSA1 bonds the cover film CL and the polarizer PL together, for example, the first adhesive layer PSA1 is in direct contact with the cover film CL and is in direct contact with the polarizer PL. Optionally, the second adhesive layer PSA2 bonds the ultra-thin glass UTG and the phase difference layer LC together, and bonds the opaque filler layer BFL and the phase difference layer LC together. For example, the second adhesive layer PSA2 is in direct contact with the ultra-thin glass UTG, in direct contact with the opaque filler layer BFL, and in direct contact with the phase difference layer LC.

[0032] The inventors of the present disclosure have found that surprisingly and unexpectedly, an ultra-thin cover for a display panel with excellent bending flexibility can be achieved according to the present disclosure. The total thickness of the cover in the present disclosure can be in the range of 50 μm to 150 μm. The cover is particularly resistant to cracks caused by repeated bending and stretching actions. In addition, by having a complex stacking structure according to the present disclosure, the cover is made highly durable and has improved impact resistance, especially along the edges of the cover.

[0033] In some embodiments, the opaque filler layer BFL includes an opaque material. Various suitable opaque filling materials and various suitable manufacturing methods can be used to manufacture the opaque filler layer BFL. For example, the opaque filling material can be deposited on a substrate (e.g., by sputtering, vapor deposition, solution coating, or spin coating); and patterned (e.g., by photolithography such as a wet etching process) to form the opaque filler layer BFL. Examples of suitable opaque filling materials for manufacturing the opaque filler layer BFL include, but are not limited to, black silicone, black polyimide, black ink, and black curing adhesive. The opaque filler layer BFL effectively protects the ultra-thin glass UTG so that the cover has impact resistance, especially along the edges of the ultra-thin glass UTG.

[0034] In some embodiments, the opaque filler layer BFL is adjacent to at least a portion of the periphery of the ultra-thin glass UTG. In one example, the opaque filler layer BFL is adjacent to the entire periphery of the ultra-thin glass UTG, for example, around the periphery of the ultra-thin glass UTG. Figure 1As shown, optionally, the orthographic projection of the second adhesive layer PSA2 on the plane containing the surface S of the cover film CL covers the orthographic projection of the ultra-thin glass UTG on the plane containing the surface S of the cover film CL, and the orthographic projection of the second adhesive layer PSA2 on the plane containing the surface S of the cover film CL exceeds the orthographic projection of the ultra-thin glass UTG on the plane containing the surface S of the cover film CL by an edge width (margin) M. Optionally, the orthographic projection of the opaque filler layer BFL on the plane containing the surface S of the cover film CL is at least partially within the edge width M, for example, is limited to the edge width M, as shown in FIG. Figure 2 In one example, a combination of the orthographic projection of the ultra-thin glass UTG on the plane including the surface S of the cover film CL and the orthographic projection of the opaque filler layer BFL on the plane including the surface S of the cover film CL substantially overlaps with the orthographic projection of the second adhesive layer PSA2 on the plane including the surface S of the cover film CL.

[0035] Optionally, the width of edge width M is in the range of 0.1 mm to 5 mm (eg, 0.1 mm to 1 mm, 1 mm to 2 mm, 2 mm to 3 mm, 3 mm to 4 mm, or 4 mm to 5 mm).

[0036] In some embodiments, the first thickness t1 of the opaque filler layer BFL is greater than or equal to the second thickness t2 of the ultra-thin glass UTG. Figure 2 As shown, the first thickness t1 is equal to the second thickness t2. The orthographic projection of the ultra-thin glass UTG on the plane including the surface S of the cover film CL and the orthographic projection of the opaque filler layer BFL on the plane including the surface S of the cover film CL do not substantially overlap.

[0037] Figure 3 is a cross-sectional view of a cover for a display panel according to some embodiments of the present disclosure. Figure 3 , the first thickness t1 is greater than the second thickness t2. Optionally, the orthographic projection of the opaque filler layer BFL on the plane including the surface S of the cover film CL is partially within the edge width M, and partially outside the edge width M. The portion of the orthographic projection of the opaque filler layer BFL on the plane including the surface S of the cover film CL outside the edge width M is located on the side of the ultra-thin glass UTG away from the second adhesive layer PSA2, for example, covering the edge of the ultra-thin glass UTG to enhance its impact resistance.

[0038] In some embodiments, the first thickness t1 of the opaque filler layer BFL is greater than or equal to the second thickness t2 of the ultra-thin glass UTG, and the difference between the first thickness t1 and the second thickness t2 is less than 50 μm. This embodiment further minimizes the total thickness of the cover. In some embodiments, the thickness of the ultra-thin glass is in the range of 30 μm to 100 μm (e.g., 30 μm to 40 μm, 40 μm to 50 μm, 50 μm to 60 μm, 60 μm to 70 μm, 70 μm to 80 μm, 80 μm to 90 μm, or 90 μm to 100 μm). Optionally, the ratio of the first thickness t1 of the opaque filler layer BFL to the second thickness t2 of the ultra-thin glass UTG is in the range of 2.5 to 3.5 (e.g., 2.5 to 3.0, or 3.0 to 3.5).

[0039] In some embodiments, reference Figure 1 , the cover may be bent along the bending direction BD. Optionally, the absorption axis of the polarizer PL is substantially perpendicular to the bending direction BD. As used herein, the term "substantially perpendicular" means that the angle is in the range of about 80 degrees to about 100 degrees, for example, about 80 degrees to about 85 degrees, about 85 degrees to about 90 degrees, about 90 degrees to about 95 degrees, or about 95 degrees to about 100 degrees.

[0040] Various suitable polarizers can be used in the present disclosure. In some embodiments, the polarizer PL is a linear polarizer. In some embodiments, the polarizer PL is an iodine-based polarizer. Optionally, the iodine-based polarizer includes iodine and / or iodide ions. In one example, the iodine-based polarizer is formed by uniaxially stretching a polyvinyl alcohol-based film dyed with iodine.

[0041] In some embodiments, the phase difference layer LC includes a half-wave plate and a quarter-wave plate. Figure 4 is a cross-sectional view of a cover for a display panel according to some embodiments of the present disclosure. Figure 4 In some embodiments, the phase difference layer LC includes a quarter wave plate QWP located on the side of the second adhesive layer PSA2 away from the ultra-thin glass UTG, and a half wave plate HWP located on the side of the quarter wave plate QWP away from the second adhesive layer PSA2. The polarizer PL is located on the side of the half wave plate HWP away from the quarter wave plate QWP. Optionally, the phase difference layer LC further includes an adhesive layer AL that bonds the quarter wave plate QWP and the half wave plate HWP together.

[0042] In some embodiments, the incident light passes through the polarizer PL (e.g., a linear polarizer) and is linearly polarized. In some embodiments, the optical axis of the half-wave plate HWP is set to a certain angle α relative to the transmission axis of the polarizer PL. When the linearly polarized light from the polarizer PL passes through the half-wave plate HWP, the polarization plane of the light will rotate by 2α. The optical axis of the quarter-wave plate QWP is set to an angle of (2α+45°) relative to the transmission axis of the polarizer PL. When the linearly polarized light from the half-wave plate HWP enters the quarter-wave plate QWP, it is converted into circularly polarized light, such as left-handed circularly polarized light. Then, the left-handed circularly polarized light (e.g., from a metal pattern in a display device with a cover) is reflected and converted into right-handed circularly polarized light. The reflected right-handed circularly polarized light enters the quarter-wave plate QWP. The right-handed circularly polarized light is circularly polarized a second time by the quarter-wave plate QWP and is now converted into linearly polarized light, the polarization direction of which is perpendicular to the transmission axis of the polarizer PL. As a result, no reflected light passes through the polarizer PL.

[0043] In some embodiments, α is in the range of 14 to 16 degrees, for example, 15 degrees. In one example, the optical axis of the half-wave plate HWP is set to 15 degrees relative to the transmission axis of the polarizer PL, and the optical axis of the quarter-wave plate QWP is set to 75 degrees relative to the transmission axis of the polarizer PL. When light passes through the polarizer PL, it becomes vertically polarized. The vertically polarized light is converted into left-handed circularly polarized light after passing through the half-wave plate HWP and the quarter-wave plate QWP. The left-handed circularly polarized light becomes right-handed circularly polarized light after being reflected by the metal pattern. Subsequently, the right-handed circularly polarized light passes through the quarter-wave plate QWP and the half-wave plate HWP, and is now converted into horizontally polarized light, whose direction is perpendicular to the transmission axis of the polarizer PL. Therefore, horizontally polarized light cannot pass through the polarizer PL.

[0044] The inventors of the present disclosure have found that the cover of the present disclosure can achieve excellent anti-glare capability and simultaneously achieve enhanced impact resistance by integrating a polarizer PL, a half-wave plate HWP, and a quarter-wave plate QWP into the cover.

[0045] Various suitable materials can be used to manufacture the half-wave plate HWP and the quarter-wave plate QWP. In one example, each of the half-wave plate HWP and the quarter-wave plate QWP includes a liquid crystal material. Examples of suitable liquid crystal materials for manufacturing the half-wave plate HWP and the quarter-wave plate QWP include nematic liquid crystal materials, cholesteric liquid crystal materials, and quasi-crystalline liquid crystal materials.

[0046] Various suitable materials and various suitable manufacturing methods can be used to manufacture the first adhesive layer PSA1 and the second adhesive layer PSA2. For example, a pressure-sensitive adhesive material can be used to form the first adhesive layer PSA1 and / or the second adhesive layer PSA2. Examples of suitable pressure-sensitive adhesive materials include, but are not limited to, acrylic-based adhesive materials, such as homopolymers and copolymers of acrylic acid, methacrylic acid, isooctyl acrylate, acrylamide, methacrylamide, acrylonitrile, methacrylonitrile, isopentyl methacrylate, 2-ethyl hexylacrylate, and butyl acrylate.

[0047] Various suitable materials and various suitable manufacturing methods can be used to manufacture the cover film CL. Examples of suitable materials for manufacturing the cover film CL include, but are not limited to, polyamines (e.g., colorless polyamine (CPI)), thin glass, ultra-thin glass, polyethylene terephthalate (PET), polyacrylate, polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene naphthalate, polyvinylidene chloride, polyvinylidene fluoride, polystyrene, vinyl alcohol copolymer, ultra-thin glass (UTG) or any combination thereof. Optionally, the cover film CL is made of a flexible polymer material. Optionally, the cover film CL is made of a flexible inorganic material. Optionally, the cover film CL also includes a hard coating sublayer.

[0048] In some embodiments, the total thickness of the cover is in the range of 50 μm to 150 μm, for example, 50 μm to 60 μm, 60 μm to 70 μm, 70 μm to 80 μm, 80 μm to 90 μm, 90 μm to 100 μm, 100 μm to 110 μm, 110 μm to 120 μm, 120 μm to 130 μm, 130 μm to 140 μm, or 140 μm to 150 μm. Optionally, the thickness of the cover film is in the range of 50 μm to 100 μm, for example, 50 μm to 60 μm, 60 μm to 70 μm, 70 μm to 80 μm, 80 μm to 90 μm, or 90 μm to 100 μm. Optionally, the thickness of the first adhesive layer is in the range of 0.1 μm to 25 μm, for example, 0.1 μm to 1 μm, 1 μm to 5 μm, 5 μm to 10 μm, 10 μm to 15 μm, 15 μm to 20 μm, or 20 μm to 25 μm. Optionally, the thickness of the polarizer is in the range of 1 μm to 15 μm, for example, 1 μm to 5 μm, 5 μm to 10 μm, or 10 μm to 15 μm. Optionally, the thickness of the phase difference layer is in the range of 0.05 μm to 5 μm, for example, 0.05 μm to 1 μm, 1 μm to 2 μm, 2 μm to 3 μm, 3 μm to 4 μm, or 4 μm to 5 μm. Optionally, the thickness of the second adhesive layer is in the range of 3 μm to 25 μm, for example, 3 μm to 5 μm, 5 μm to 10 μm, 10 μm to 15 μm, 15 μm to 20 μm, or 20 μm to 25 μm. Optionally, the thickness of the ultra-thin glass is in the range of 3 μm to 100 μm, for example, 3 μm to 5 μm, 5 μm to 10 μm, 10 μm to 20 μm, 20 μm to 30 μm, 30 μm to 40 μm, 40 μm to 50 μm, 50 μm to 60 μm, 60 μm to 70 μm, 70 μm to 80 μm, 80 μm to 90 μm, or 90 μm to 100 μm. Optionally, the hard coating sublayer has a thickness in the range of 5 μm to 15 μm, for example, 5 μm to 10 μm, or 10 μm to 15 μm.

[0049] In another aspect, the present disclosure provides a display device. Figure 5 is a cross-sectional view of a display device having a display panel according to some embodiments of the present disclosure. Figure 5 , the display device includes a display panel DP and a cover. Figure 5In some embodiments, the cover includes a cover film CL; a first adhesive layer PSA1 located on the cover film CL; a polarizer PL located on the side of the first adhesive layer PSA1 away from the cover film CL; a phase difference layer LC located on the side of the polarizer PL away from the first adhesive layer PSA1; a second adhesive layer PSA2 located on the side of the phase difference layer LC away from the polarizer PL; and an ultra-thin glass UTG and an opaque filler layer BFL located on the side of the second adhesive layer PSA2 away from the phase difference layer LC. Optionally, the first adhesive layer PSA1 bonds the cover film CL and the polarizer PL together, for example, the first adhesive layer PSA1 is in direct contact with the cover film CL and is in direct contact with the polarizer PL. Optionally, the second adhesive layer PSA2 bonds the ultra-thin glass UTG and the phase difference layer LC together, and bonds the opaque filler layer BFL and the phase difference layer LC together. For example, the second adhesive layer PSA2 is in direct contact with the ultra-thin glass UTG, in direct contact with the opaque filler layer BFL, and in direct contact with the phase difference layer LC.

[0050] In some embodiments, the display device further includes a third adhesive layer PSA3 between the ultra-thin glass UTG and the display panel DP. Optionally, the third adhesive layer PSA3 bonds the ultra-thin glass UTG and the display panel DP together. Optionally, the third adhesive layer PSA3 is in direct contact with the ultra-thin glass UTG and in direct contact with the opaque filler layer BFL. Optionally, the opaque filler layer BFL is disposed in an area corresponding to the peripheral area of ​​the display panel. As used herein, the term "peripheral area" refers to an area of ​​the display panel in which various circuits and wires are provided to send signals to the display panel. In order to increase the transparency of the display panel, non-transparent or opaque components of the display panel (e.g., batteries, printed circuit boards, metal frames) may be disposed in the peripheral area instead of in the display area.

[0051] In some embodiments, the display device further comprises a back support layer SL located at a side of the display panel DP away from the third adhesive layer PSA3. The back support layer SL may be a flexible support layer, for example, a layer made of a flexible polymer material.

[0052] Optionally, the display panel DP is an organic light emitting diode display panel. Optionally, the display panel DP is a liquid crystal display panel.

[0053] Examples of suitable display devices include, but are not limited to, electronic paper, mobile phones, tablet computers, televisions, monitors, notebook computers, digital photo albums, GPS, etc. Optionally, the display device further comprises one or more integrated circuits connected to the display panel.

[0054] On the other hand, the present disclosure also provides a method for manufacturing a cover for a display panel and a method for manufacturing a display device. In some embodiments, the method for manufacturing a cover includes providing a cover film, a polarizer, and an ultra-thin glass; forming a first adhesive layer that bonds the cover film and the polarizer together; forming a phase difference layer on the polarizer; forming a second adhesive layer that bonds the phase difference layer to the ultra-thin glass; and forming an opaque filler layer adjacent to at least a portion of the periphery of the ultra-thin glass. The opaque filler layer includes an opaque material. The cover of the present disclosure is formed as an integrated unit for subsequent manufacture of a display device. Therefore, the manufacture of the display device can be greatly simplified.

[0055] In some embodiments, a method of manufacturing a display device includes providing a cover described in the present disclosure or manufactured by the method of the present disclosure; providing a display panel; and bonding the cover and the display panel by forming a third adhesive layer between the cover and the display panel.

[0056] For the purpose of illustration and description, the above description of the embodiments of the present invention has been given. It is not exhaustive, nor is it intended to limit the present invention to the precise form or exemplary embodiments disclosed. Therefore, the foregoing description should be considered illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to explain the principles of the present invention and its best mode practical application, so that those skilled in the art can understand the various embodiments of the present invention and the various modifications suitable for the specific use or implementation under consideration. The scope of the present invention is intended to be defined by the appended claims and their equivalents, wherein all terms are meant to have the broadest reasonable meaning unless otherwise stated. Therefore, the term "the present invention" and the like do not necessarily limit the scope of the claims to a specific embodiment, and the reference to the exemplary embodiments of the present invention does not mean a limitation of the present invention, and such limitation should not be inferred. The present invention is limited only by the spirit and scope of the appended claims. In addition, these claims may involve the use of "first", "second", etc., followed by a noun or element. These terms should be understood as nomenclature, and should not be interpreted as limiting the number of elements modified by these nomenclatures, unless a specific number has been given. Any advantages and benefits described may not apply to all embodiments of the present invention. It should be understood that those skilled in the art may make changes to the described embodiments without departing from the scope of the present invention as defined by the appended claims. In addition, the elements and assemblies in this disclosure are not intended to be contributed to the public, regardless of whether the element or assembly is clearly described in the appended claims.

Claims

1. A cover for a display panel, comprising: Covering film; a first adhesive layer disposed on the cover film; a polarizer, which is located on a side of the first adhesive layer away from the cover film; a phase difference layer, which is located on a side of the polarizer away from the first adhesive layer; A second adhesive layer, which is located on a side of the phase difference layer away from the polarizer; as well as An ultra-thin glass and an opaque filler layer, which is located on a side of the second adhesive layer away from the phase difference layer; Wherein, the opaque filler layer comprises an opaque material; and The opaque filler layer abuts at least a portion of a perimeter of the ultra-thin glass; The first thickness of the opaque filler layer is greater than the second thickness of the ultra-thin glass, and the difference between the first thickness and the second thickness is less than 50 μm; The orthographic projection of the opaque filler layer partially overlaps with the orthographic projection of the ultra-thin glass.

2. The cover according to claim 1, wherein The orthographic projection of the second adhesive layer on the plane including the surface of the cover film covers the orthographic projection of the ultra-thin glass on the plane including the surface of the cover film, and the orthographic projection of the second adhesive layer on the plane including the surface of the cover film exceeds the orthographic projection of the ultra-thin glass on the plane including the surface of the cover film by an edge width; as well as An orthographic projection of the opaque filler layer onto the plane containing the surface of the cover film is at least partially within the edge width.

3. The cover according to claim 2, wherein: A combination of the orthographic projection of the ultra-thin glass on the plane including the surface of the cover film and the orthographic projection of the opaque filler layer on the plane including the surface of the cover film substantially overlaps with the orthographic projection of the second adhesive layer on the plane including the surface of the cover film.

4. The cover according to any one of claims 1 to 3, wherein: The thickness of the ultra-thin glass is in the range of 30 μm to 100 μm; and A ratio of a thickness of the opaque filler layer to a thickness of the ultra-thin glass is in a range of 2.5 to 3.

5.

5. The cover according to any one of claims 1 to 3, wherein The cover is bendable along a bending direction; and The absorption axis of the polarizer is substantially perpendicular to the bending direction.

6. The cover according to any one of claims 1 to 3, wherein: The polarizer is an iodine-based linear polarizer.

7. The cover according to any one of claims 1 to 3, wherein: The phase difference layer includes a half-wave plate and a quarter-wave plate.

8. The cover according to any one of claims 1 to 3, wherein: The total thickness of the cover is in the range of 50 μm to 150 μm; The thickness of the covering film is in the range of 50 μm to 100 μm; The thickness of the first adhesive layer is in the range of 0.1 μm to 25 μm; The thickness of the polarizer is in the range of 1 μm to 15 μm; The thickness of the phase difference layer is in the range of 0.05 μm to 5 μm; The second adhesive layer has a thickness in a range of 3 μm to 25 μm; and The thickness of the ultra-thin glass is in the range of 30 μm to 100 μm.

9. A display device, comprising: build; as well as Display panel; Wherein, the cover comprises: Covering film; a first adhesive layer disposed on the cover film; a polarizer, which is located on a side of the first adhesive layer away from the cover film; a phase difference layer, which is located on a side of the polarizer away from the first adhesive layer; A second adhesive layer is located on a side of the phase difference layer away from the polarizer; and An ultra-thin glass and an opaque filler layer, which is located on a side of the second adhesive layer away from the phase difference layer; Wherein, the opaque filler layer comprises an opaque material; and The opaque filler layer abuts at least a portion of a perimeter of the ultra-thin glass; The first thickness of the opaque filler layer is greater than the second thickness of the ultra-thin glass, and the difference between the first thickness and the second thickness is less than 50 μm; The orthographic projection of the opaque filler layer partially overlaps with the orthographic projection of the ultra-thin glass. 10 . The display device of claim 9 , further comprising a third adhesive layer between the ultra-thin glass and the display panel.

11. The display device according to claim 9 or 10, wherein: The orthographic projection of the second adhesive layer on the plane including the surface of the cover film covers the orthographic projection of the ultra-thin glass on the plane including the surface of the cover film, and the orthographic projection of the second adhesive layer on the plane including the surface of the cover film exceeds the orthographic projection of the ultra-thin glass on the plane including the surface of the cover film by an edge width; as well as An orthographic projection of the opaque filler layer onto the plane containing the surface of the cover film is at least partially within the edge width.

12. The display device according to claim 11, wherein: A combination of the orthographic projection of the ultra-thin glass on the plane including the surface of the cover film and the orthographic projection of the opaque filler layer on the plane including the surface of the cover film substantially overlaps with the orthographic projection of the second adhesive layer on the plane including the surface of the cover film.

13. The display device according to claim 9 or 10, wherein: The thickness of the ultra-thin glass is in the range of 30 μm to 100 μm; and A ratio of a thickness of the opaque filler layer to a thickness of the ultra-thin glass is in a range of 2.5 to 3.

5.

14. The display device according to claim 9 or 10, wherein: The cover is bendable along a bending direction; and The absorption axis of the polarizer is substantially perpendicular to the bending direction.

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