Display device, display panel, transparent cover plate and manufacturing method

Abstract

A display device, a display panel, a transparent cover plate (2) and a manufacturing method, relating to the technical field of display. The transparent cover plate (2) has a middle area (MA) and an edge area (EA) surrounding the middle area (MA). The transparent cover plate (2) comprises a transparent substrate (21), a polarizer (22) and a light-shielding layer (24), wherein the polarizer (22) is fixed on the transparent substrate (21), the boundary of the polarizer (22) not extending beyond the boundary of the transparent substrate (21); the thickness of the transparent substrate (21) is greater than that of the polarizer (22); the light-shielding layer (24) is located in the edge area (EA) and surrounds the middle area (MA), the light-shielding layer (24) partially overlapping the polarizer (22); the elastic modulus of the transparent substrate (21) is greater than that of the polarizer (22). The problem of mura can be ameliorated.

Description

Display device, display panel, transparent cover plate and manufacturing method Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically, to a display device, a display panel, a method for manufacturing the display panel, a transparent cover plate, and a method for manufacturing the transparent cover plate. Background Technology

[0002] With the development of display technology, display devices are becoming thinner and thinner. However, as the thickness decreases, unevenness, or molding phenomenon, can easily occur in some areas of the display device. This unevenness can lead to display abnormalities and affect the display effect.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] This disclosure provides a display device, a display panel, a method for manufacturing the display panel, a transparent cover plate, and a method for manufacturing the transparent cover plate.

[0005] According to one aspect of this disclosure, a transparent cover plate is provided, having a central region and an edge region surrounding the central region; the transparent cover plate includes a transparent substrate, a polarizer, and a light-shielding layer; the polarizer is fixed to the transparent substrate, and the boundary of the polarizer does not extend beyond the boundary of the transparent substrate; the thickness of the transparent substrate is greater than that of the polarizer; the light-shielding layer is located in the edge region and surrounds the central region, and the light-shielding layer partially overlaps with the polarizer; the elastic modulus of the transparent substrate is greater than that of the polarizer.

[0006] In one exemplary embodiment of this disclosure, the transparent cover plate further includes a first adhesive layer, the transparent substrate, the first adhesive layer and the polarizer are stacked in sequence, and the transparent substrate is bonded to the polarizer through the first adhesive layer.

[0007] In one exemplary embodiment of this disclosure, the light-shielding layer and the first adhesive layer are disposed on the same surface of the transparent substrate, and the light-shielding layer surrounds the first adhesive layer and contacts the first adhesive layer.

[0008] In one exemplary embodiment of this disclosure, the transparent substrate has a groove surrounding the intermediate region on the surface near the polarizer, the groove extending inward from the edge of the transparent substrate; the light-shielding layer fills the groove, and the first adhesive layer is bonded to the area of ​​the transparent substrate surrounded by the groove and a portion of the light-shielding layer.

[0009] In one exemplary embodiment of this disclosure, the transparent substrate is provided with a receiving groove, and the polarizer is fixed in the receiving groove; the light-shielding layer overlaps with both the transparent substrate and the polarizer.

[0010] In one exemplary embodiment of this disclosure, the polarizer is stacked on one side of the transparent substrate, and the boundary of the polarizer is aligned with the boundary of the transparent substrate; the light-shielding layer is stacked on the surface of the polarizer away from the transparent substrate.

[0011] The transparent cover plate also includes a connecting layer, which is stacked on the sidewalls of the transparent substrate and the polarizer and covers the gap where the polarizer and the transparent substrate meet.

[0012] In one exemplary embodiment of this disclosure, the light-shielding layer and the connecting layer are a continuous integral structure.

[0013] In one exemplary embodiment of this disclosure, the polarizer is stacked on one side of the transparent substrate; the transparent substrate near the polarizer has a groove surrounding the central area, the groove extending inward from the edge of the transparent substrate; the light-shielding layer fills the groove and is attached to the polarizer.

[0014] In one exemplary embodiment of this disclosure, the transparent cover plate further includes a support layer, and the polarizer is sandwiched between the transparent substrate and the support layer and is attached to the support layer.

[0015] In one exemplary embodiment of this disclosure, the transparent cover plate further includes an anti-abrasion layer stacked on the surface of the transparent substrate away from the polarizer; the hardness of the anti-abrasion layer is greater than the hardness of the transparent substrate.

[0016] In one exemplary embodiment of this disclosure, the material of the transparent substrate includes at least one of polycarbonate, polymethyl methacrylate, polystyrene, polyimide, polyethylene terephthalate, and glass.

[0017] According to one aspect of this disclosure, a method for manufacturing a transparent cover is provided, comprising:

[0018] A ring-shaped light-shielding layer is formed on the surface of a polarizer;

[0019] A polarizer with the light-shielding layer formed thereon is placed in a cavity;

[0020] A transparent material is poured into the cavity and cured to obtain a transparent substrate covering the polarizer and the light-shielding layer.

[0021] In one exemplary embodiment of this disclosure, an anti-wear layer is formed on the surface of the transparent substrate away from the polarizer, and the hardness of the anti-wear layer is greater than the hardness of the transparent substrate.

[0022] According to one aspect of this disclosure, a display panel is provided, comprising:

[0023] Display substrate;

[0024] The second adhesive layer is disposed on the light-emitting side of the display substrate and is bonded to the display substrate;

[0025] In any of the above-mentioned transparent cover plates, the polarizer is bonded to the surface of the second adhesive layer away from the display substrate.

[0026] According to one aspect of this disclosure, a method for manufacturing a display panel is provided, comprising:

[0027] Forming a transparent cover plate as described in any of the above;

[0028] A second adhesive layer is bonded to the light-emitting side of a display substrate;

[0029] The polarizing film of the transparent cover is bonded to the second adhesive layer.

[0030] According to one aspect of this disclosure, a display device is provided, comprising the display panel described in any of the preceding claims.

[0031] The display device, display panel, transparent cover, and manufacturing method disclosed herein form a transparent cover that provides protection and reduces reflection of ambient light based on a polarizer and a transparent substrate, thus integrating protection and anti-reflection. Furthermore, since the polarizer is fixed to the transparent substrate, and the elastic modulus of the transparent substrate is greater than that of the polarizer, the polarizer can be constrained by the transparent substrate, improving its resistance to deformation. Even if the second adhesive layer of the display panel deforms, it is unlikely to cause deformation of the polarizer. Compared to a polarizer with localized deformation, a flat polarizer refracts ambient light more uniformly, and the incident and emitted light are less likely to exhibit a significant difference perceptible to the human eye, thereby visually reducing the molding effect.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0034] Figure 1 is a top view schematic diagram of one embodiment of the display device of this disclosure.

[0035] Figure 2 is a cross-sectional schematic diagram of one embodiment of the display device of this disclosure.

[0036] Figure 3 is a cross-sectional schematic diagram of a first embodiment of the display device of this disclosure.

[0037] Figure 4 is a cross-sectional schematic diagram of a second embodiment of the display device of this disclosure.

[0038] Figure 5 is a cross-sectional schematic diagram of the transparent substrate of the second embodiment of the display device of this disclosure.

[0039] Figure 6 is a cross-sectional schematic diagram of a third embodiment of the display device of this disclosure.

[0040] Figure 7 is a cross-sectional schematic diagram of a third embodiment of the display device of this disclosure.

[0041] Figure 8 is a cross-sectional schematic diagram of a fourth embodiment of the display device of this disclosure.

[0042] Figure 9 is a cross-sectional schematic diagram of a fifth embodiment of the display device of this disclosure.

[0043] Figure 10 is a cross-sectional schematic diagram of a sixth embodiment of the display device of this disclosure.

[0044] Figure 11 is a cross-sectional schematic diagram of the seventh embodiment of the display device of this disclosure. Detailed Implementation

[0045] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0046] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0047] This disclosure provides a display device, as shown in FIG1, which may include a display panel. The display panel may be divided into multiple regions, including a display area AA and an outer peripheral area WA located outside the display area AA. The outer peripheral area WA may be a continuous annular region surrounding the display area AA, or a discontinuous region surrounding the display area AA.

[0048] As shown in Figure 2, the display panel may include a display substrate 1 and a transparent cover plate 2, wherein:

[0049] The display substrate 1 may include a driving backplate and a plurality of light-emitting devices disposed on one side of the driving backplate. Each light-emitting device may be arrayed along a first direction and a second direction and located in the display area AA. The light-emitting devices can be driven to emit light by the driving circuit in the driving backplate to display an image; wherein:

[0050] The driving backplane may include a substrate and circuit layers stacked on one side of the substrate. The substrate may be a flat plate structure, and its material may be a rigid material such as glass or a flexible material such as polyimide.

[0051] The circuit layer includes the aforementioned driving circuitry. For example, the driving circuitry may include pixel circuitry located in display area AA and peripheral circuitry located in peripheral area WA. Pixel circuitry can be 7T1C, 8T1C, or similar structures, as long as it can drive the light-emitting devices to emit light; its structure is not specifically limited here. Here, nTmC indicates that one pixel circuitry includes n thin-film transistors (represented by the letter "T") and m capacitors (represented by the letter "C"). The number of pixel circuits can be the same as the number of light-emitting devices, and they are connected one-to-one with each light-emitting device. Of course, multiple light-emitting devices can be connected to the same pixel circuitry; this is not specifically limited here. Peripheral circuitry is connected to the pixel circuitry and is used to input driving signals to the pixel circuitry to control the light-emitting devices to emit light. Peripheral circuitry may include gate driving circuitry and light-emitting control circuitry; of course, it may also include other circuitry. The specific structure of the peripheral circuitry is not specifically limited here.

[0052] The light-emitting device can be an OLED (organic light-emitting diode) using organic light-emitting materials, or a Mini LED (sub-millimeter light-emitting diode with a size of 100μm-200μm), Micro LED (micro light-emitting diode with a size of no more than 100μm), or LED (light-emitting diode with a size of more than 200μm) using inorganic light-emitting materials. No special restrictions are imposed here, as long as it can emit light.

[0053] Taking an OLED as an example, the light-emitting device may include a first electrode, a light-emitting layer, and a second electrode stacked sequentially in a direction away from the driving backplane. By applying an electrical signal to the first and second electrodes, the light-emitting layer can be excited to emit light; the specific light-emitting principle will not be detailed here. Simultaneously, the display substrate 1 may also include a pixel definition layer separating the light-emitting devices, which may be disposed on the same surface of the driving backplane as the light-emitting devices. The pixel definition layer has pixel openings exposing each of the first electrodes, and the light-emitting layer and the second electrode are stacked sequentially on the first electrodes within the pixel openings.

[0054] In some embodiments of this disclosure, the display substrate 1 may further include an encapsulation layer that covers each light-emitting device to block external water and oxygen, preventing them from corroding the light-emitting devices. For example, the encapsulation layer may be a thin-film encapsulation method, which may include a first inorganic layer, an organic layer, and a second inorganic layer, wherein:

[0055] The first inorganic layer can cover all the light-emitting devices, that is, the first inorganic layer can cover the surface of the second electrode away from the driving backplate. The material of the first inorganic layer can include inorganic insulating materials such as silicon nitride and silicon oxide. The organic layer can be disposed on the surface of the first inorganic layer away from the driving backplate, and the boundary of the organic layer can be defined inside the boundary of the first inorganic layer by a barrier dam located in the peripheral area WA. At the same time, the boundary of the orthographic projection of the organic layer on the driving backplate can be located in the peripheral area WA, ensuring that the organic layer can cover all the light-emitting devices. The second inorganic layer can cover the organic layer and the first inorganic layer that is not covered by the organic layer. The second inorganic layer can block the intrusion of water and oxygen, and planarization is achieved by the organic layer having fluidity before curing. The material of the second inorganic layer can include inorganic insulating materials such as silicon nitride and silicon oxide.

[0056] As shown in Figure 2, the transparent cover plate 2 can be disposed on the light-emitting side of the display substrate 1, that is, on the side of the encapsulation layer away from the driving backplane. The transparent cover plate 2 can protect the display substrate 1 and reduce the reflection of ambient light. The structure of the transparent cover plate 2 is described in detail below:

[0057] The transparent cover plate 2 may include a transparent substrate 21 and a polarizer 22 fixed on the transparent substrate 21. The transparent substrate 21 is at least partially located on the side of the polarizer 22 away from the display substrate 1, and can play a protective role. The polarizer 22 can prevent some of the ambient light reflected by the display substrate 1 from escaping, thereby reducing ambient light reflection; wherein:

[0058] The transparent substrate 21 can be a rigid plate structure, and it can be made of at least one of polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), polyimide (PI), polyethylene terephthalate (PET) and glass. Of course, other materials can also be used, as long as they have the functions of light transmission and protection.

[0059] The polarizer 22 can be a multi-layer structure, which may include a quarter-wave plate and a linear polarizer, with the linear polarizer located on the side of the quarter-wave plate away from the display substrate 1. Ambient light from the outside world becomes first linearly polarized light after passing through the linear polarizer; the first linearly polarized light is then converted into first circularly polarized light (e.g., left-handed polarization) after passing through the quarter-wave plate; the first circularly polarized light is reflected by the metal film layer such as the second electrode of the display substrate 1 and converted into second circularly polarized light (e.g., right-handed polarization) with the opposite polarization direction to the first circularly polarized light; after passing through the quarter-wave plate again, it can be converted into second linearly polarized light perpendicular to the first linearly polarized light. Since the second linearly polarized light cannot pass through the linear polarizer, the reflection of ambient light is reduced.

[0060] The polarizer 22 can be fixed as a whole to the transparent substrate 21, thereby forming a whole with the transparent substrate 21, i.e., the transparent cover plate 2. The transparent substrate 21 and the polarizer 22 can be bonded together by the first adhesive layer 23, or they can be fixed together by snap-fitting instead of bonding, or they can be formed by casting process, thereby fixing the polarizer 22 to the transparent substrate 21.

[0061] As shown in Figure 2, the transparent cover plate 2 can be bonded to the display substrate 1 through the second adhesive layer 3. The second adhesive layer 3 can be disposed on the light-emitting side of the display substrate 1 and bonded to the surface of the display substrate 1. This surface can be the surface of the encapsulation layer away from the driving backplate.

[0062] Of course, in some embodiments, the display panel may also include a touch layer, which may be disposed on the light-emitting side of the display substrate 1, for example, on the side of the encapsulation layer away from the driving backplate; in this case, the transparent cover plate 2 may be disposed on the side of the touch layer away from the display substrate 1 and bonded to the surface of the touch layer away from the display substrate 1.

[0063] Both the first adhesive layer 23 and the second adhesive layer 3 can be made of optical adhesive, which facilitates light transmission while achieving bonding. For example, the first adhesive layer 23 can be made of optically transparent resin (OCR). Liquid resin is applied to the transparent substrate 21, and then the polarizer 22 is pressed onto the resin. After the resin has leveled, it is cured by light (e.g., ultraviolet light) or heat to form the first adhesive layer 23. Because there is a liquid resin leveling process when using optically transparent resin, the filling is more compact, and air bubbles caused by gaps are less likely to occur. Of course, for transparent cover plates 2 that do not use adhesive to fix the polarizer 22 and the transparent substrate 21, the first adhesive layer 23 may not be present.

[0064] The second adhesive layer 3 can be made of optically transparent adhesive (OCA), which can be a double-sided tape. It can be bonded to the display substrate 1, and then the transparent cover plate 2 is bonded to the second adhesive layer 3. The polarizer 22 is bonded to the second adhesive layer 3. The second adhesive layer 3 can also be cured by light or heat, and since the second adhesive layer 3 can be bonded to the display substrate 1 as a whole, the operation is relatively convenient.

[0065] Furthermore, as shown in Figure 2, in order to shield the outer perimeter area WA of the display panel, the transparent cover plate 2 may also include a light-shielding layer 24, which may be made of black ink or other light-absorbing materials, as long as it can block light. The light-shielding layer 24 may be located in the outer perimeter area, and the light-shielding layer 24 has a ring-shaped structure surrounding the display area. Correspondingly, the transparent cover plate 2 itself can be divided into a central area MA and an edge area EA surrounding the central area MA. When the transparent cover plate 2 is applied to the display panel, the range of the central area MA is the range of the display area, and the range of the outer perimeter area is the range of the edge area EA. Therefore, for the transparent cover plate 2, the light-shielding layer may be located in the edge area EA and has a ring-shaped structure surrounding the central area MA, so as to shield the wiring and circuits in the outer perimeter area of ​​the display panel.

[0066] The elastic modulus of the transparent substrate 21 is greater than that of the polarizer 22, making the transparent substrate 21 more difficult to deform than the polarizer 22. If the display substrate 1 has local deformation, resulting in molding problems, even if these deformations cause deformation of the second adhesive layer 3, the transparent substrate 21 and the polarizer 22 are fixed as a whole, thus constraining the polarizer 22 and making it difficult for it to deform as well. This improves the polarizer 22's resistance to deformation and keeps it flat. Compared to the polarizer 22 with local deformation, the flat polarizer 22 refracts ambient light more uniformly, without local anomalies. The incident and emitted light from the polarizer 22 are less likely to have a large difference that is perceptible to the human eye, thereby visually reducing the molding effect.

[0067] Furthermore, in some embodiments of this disclosure, the display panel may also support a heat dissipation layer 4, which may be disposed on the side of the display substrate 1 away from the transparent cover plate 2, and the heat dissipation layer 4 includes an adhesive layer, a buffer layer, a support layer and a heat dissipation layer stacked sequentially in the direction away from the display substrate 1, wherein:

[0068] The adhesive layer can be a mesh adhesive (Embo), which has the function of bonding and venting, and is flexible, so it does not affect the flexibility of the flexible display panel.

[0069] The buffer layer can be bonded to the surface of the adhesive layer away from the display substrate 1, and the buffer layer can be made of foam or other elastic materials.

[0070] The support layer is attached to the surface of the buffer layer away from the display substrate 1, and it can play a supporting and reinforcing role. The support layer can be made of materials such as polyimide (PI).

[0071] The heat dissipation layer can be disposed on the surface of the support layer away from the display substrate 1, and can be bonded to the support layer by adhesives such as pressure-sensitive adhesive. The heat dissipation layer can be made of materials such as metal or alloy, and plays a role in heat conduction. For example, the material of the heat dissipation layer can be copper.

[0072] The structure of the transparent cover plate 2 is illustrated below:

[0073] First implementation method

[0074] As shown in Figure 3, the transparent cover plate 2 may include a transparent substrate 21, a first adhesive layer 23 and a polarizer 22 stacked in sequence, and the transparent substrate 21 is bonded to the polarizer 22 through the first adhesive layer 23, that is, the first adhesive layer 23 is bonded between the transparent substrate 21 and the polarizer 22.

[0075] The light-shielding layer 24 and the first adhesive layer 23 are disposed on the same surface of the transparent substrate 21, and the light-shielding layer 24 is disposed around the first adhesive layer 23. The boundary of the polarizer 22 extends beyond the boundary of the first adhesive layer 23, but is located inside the boundary of the transparent substrate 21. That is, the area covered by the polarizer 22 is smaller than the transparent substrate 21 and larger than the first adhesive layer 23, so that the polarizer 22 extends from the middle region MA to the edge region EA. At the same time, the first adhesive layer 23 and the light-shielding layer 24 have the same thickness to prevent the polarizer 22 from tilting. In addition, the light-shielding layer 24 can contact the first adhesive layer 23 to prevent gaps from appearing between them.

[0076] Second implementation method

[0077] As shown in Figures 4 and 5, the transparent cover plate 2 may include a transparent substrate 21, a first adhesive layer 23 and a polarizer 22 stacked in sequence, and the transparent substrate 21 is bonded to the polarizer 22 through the first adhesive layer 23, that is, the first adhesive layer 23 is bonded between the transparent substrate 21 and the polarizer 22.

[0078] A recess 211 can be formed around the central region MA on the surface of the transparent substrate 21 near the polarizer 22. The recess 211 can be annular and extends inward from the edge of the transparent substrate 21. The light-shielding layer 24 is filled in the recess 211, thereby embedding the light-shielding layer 24 into the transparent substrate 21. At the same time, the thickness of the light-shielding layer 24 can be equal to the depth of the recess 211, so that the surface of the transparent substrate 21 near the polarizer 22 is coplanar with the surface of the light-shielding layer 24 near the polarizer 22. The first adhesive layer 23 can be bonded to the area of ​​the transparent substrate 21 surrounded by the recess 211, and can extend to the surface of the light-shielding layer 24 and bond to the light-shielding layer 24.

[0079] By embedding the light-shielding layer 24 into the transparent substrate 21 as described above, only the first adhesive layer 23 is needed between the polarizer 22 and the transparent substrate 21, which helps to make the polarizer 22 flatter.

[0080] Third implementation method

[0081] As shown in Figures 6 and 7, the transparent cover plate 2 may include a transparent substrate 21 and a polarizer 22, but without a first adhesive layer 23. A receiving groove 212 may be formed in the transparent substrate 21, the depth of which is less than the thickness of the transparent substrate 21, so that the receiving groove 212 does not penetrate the transparent substrate 21. The polarizer 22 can be engaged in the receiving groove 212, thereby embedding the polarizer 22 into the transparent substrate 21 and fixing it by snap-fitting, thus eliminating the need for the first adhesive layer 23; at the same time, the light-shielding layer overlaps with both the transparent substrate and the polarizer.

[0082] Of course, in other embodiments, even if there is a receiving groove 212, a first adhesive layer 23 can be provided therein, so that the polarizer 22 is placed in the receiving groove 212 and the polarizer 22 is bonded to the surface of the receiving groove 212.

[0083] Fourth implementation method

[0084] As shown in Figure 8, the transparent cover plate 2 may include a transparent substrate 21 and a polarizer 22, but without a first adhesive layer 23. The polarizer 22 is directly stacked on one side of the transparent substrate 21, meaning the two are in direct contact. Simultaneously, the boundary of the polarizer 22 is aligned with the boundary of the transparent substrate 21, indicating that the polarizer 22 and the transparent substrate 21 have the same shape and size. A light-shielding layer 24 may be stacked on the surface of the polarizer 22 away from the transparent substrate 21, and is a ring-shaped structure located in the edge region EA. The outer edge of the light-shielding layer 24 may be aligned with the edge of the polarizer 22.

[0085] Furthermore, the transparent cover plate 2 also includes a connecting layer 25. The connecting layer 25 can be made of an adhesive material and is stacked on the sidewalls of the transparent substrate 21 and the polarizer 22, covering the gap where the polarizer 22 and the transparent substrate 21 meet, thereby fixing the transparent substrate 21 and the polarizer 22 together through the connecting layer 25. For example, the connecting layer 25 can be made of black ink, and it can be an integral structure with the light-shielding layer 24. That is, the connecting layer 25 can be regarded as the area where the light-shielding layer 24 continuously extends to the sidewalls of the transparent substrate 21 and the polarizer 22. The integral structure of the light-shielding layer 24 and the connecting layer 25 can serve as a connection while shielding light, eliminating the need for the first adhesive layer 23.

[0086] Of course, in other embodiments, even if the light-shielding layer 24 and the connecting layer 25 of the above-described integrated structure are present, a first adhesive layer 23 is provided between the polarizer 22 and the transparent substrate 21.

[0087] Fifth implementation method

[0088] As shown in Figure 9, the transparent cover plate 2 may include a transparent substrate 21, a polarizer 22, and a light-shielding layer 24. A recessed groove 211 surrounding the central region MA can be formed on the surface of the transparent substrate 21 near the polarizer 22. The recessed groove 211 may be annular and extends inward from the edge of the transparent substrate 21. The light-shielding layer 24 fills the recessed groove 211, thereby embedding the light-shielding layer 24 into the transparent substrate 21. At the same time, the thickness of the light-shielding layer 24 may be equal to the depth of the recessed groove 211, so that the surface of the transparent substrate 21 near the polarizer 22 is coplanar with the surface of the light-shielding layer 24 near the polarizer 22.

[0089] In this embodiment, the first adhesive layer 23 can be omitted, and the transparent substrate 21 and the polarizer 22 can be in direct contact, with the light-shielding layer 24 also in direct contact with the polarizer 22. To fix the polarizer 22 to the transparent substrate 21, a transparent material can be cast onto the polarizer 22 using a casting process. After the transparent material cures, the transparent substrate 21 can be formed. The transparent substrate 21 formed in this way can be fixed to the polarizer 22 as a whole without the aid of the first adhesive layer 23.

[0090] Sixth implementation method

[0091] As shown in Figure 10, the transparent cover plate 2 may include a transparent substrate 21, a polarizer 22, and a light-shielding layer 24. Its structure is the same as that of the fifth embodiment mentioned above, and will not be described in detail here. Furthermore, the transparent cover plate 2 may also include a support layer 26. The polarizer 22 can be sandwiched between the transparent substrate 21 and the support layer 26 and is attached to the support layer 26. The transparent substrate 21 and the support layer 26 can fix the polarizer 22 from both sides to further prevent the polarizer 22 from deforming.

[0092] The transparent substrate 21 and the support layer 26 can be made of the same transparent material, and the transparent material can be cast on both sides of the polarizer 22 by casting process. After the transparent material is cured, the transparent substrate 21 and the support layer 26 can be formed.

[0093] Seventh implementation method

[0094] As shown in Figure 11, the transparent cover plate 2 may include a transparent substrate 21, a polarizer 22, and a light-shielding layer 24. Its structure may be the same as in the fifth or sixth embodiment described above, and will not be described in detail here. The transparent cover plate 2 also includes an anti-wear layer 27, which may be stacked on the surface of the transparent substrate 21 away from the polarizer 22, and the hardness of the anti-wear layer 27 is greater than the hardness of the transparent substrate 21; the anti-wear layer 27 can protect the transparent substrate 21 and improve its anti-wear properties. The anti-wear layer 27 may be made of silicon hydride, silicon fluoride, etc., as long as its hardness is higher than that of the transparent substrate 21.

[0095] The following describes the method of forming the transparent cover plate 2 by casting. This disclosure also provides a method for manufacturing the transparent cover plate, as shown in Figures 9-11. The transparent cover plate 2 can be the transparent cover plate 2 of the fifth to seventh embodiments described above, or it can be other transparent cover plates 2 formed by casting. The manufacturing method of this disclosure may include steps S110-S130, wherein:

[0096] Step S110: Form an annular light-shielding layer on the surface of a polarizer.

[0097] The polarizer 22 can be prefabricated and participate in the formation of the transparent cover as a whole. The light-shielding layer 24 can be directly stacked on the surface of the polarizer 22 by means of printing or other methods. The specific structure of the polarizer 22 and the light-shielding layer 24 can be referred to the description above, and will not be described in detail here.

[0098] Step S120: Place the polarizer with the light-shielding layer inside a cavity.

[0099] The polarizer 22 with the stacked light-shielding layer 24 can be placed as a whole in the cavity of the mold, and the polarizer 22 can be positioned. The shape of the cavity can match the polarizer 22.

[0100] Step S130: Pour transparent material into the cavity and cure it to obtain a transparent substrate covered with a polarizer and a light-shielding layer.

[0101] The transparent material can be polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), polyimide (PI), polyethylene terephthalate (PET), etc., and no special limitation is made here. After the transparent material is cured, a transparent substrate 21 is obtained.

[0102] Furthermore, the aforementioned support layer 26 can also be formed simultaneously with the transparent substrate 21 through a casting process. It can be cast from both sides of the polarizer 22 within the cavity, and after curing, the transparent substrate 21 and the support layer 26 can be obtained.

[0103] In some embodiments of this disclosure, the method for manufacturing the transparent cover plate further includes:

[0104] Step S140: An anti-wear layer is formed on the surface of the transparent substrate away from the polarizer, and the hardness of the anti-wear layer is greater than that of the transparent substrate.

[0105] After completing steps A110-S130 above, the pre-formed anti-wear layer 27 can be fixed to the surface of the transparent substrate 21 away from the polarizer 22. Of course, the anti-wear layer 27 can also be formed on the transparent substrate 21 by a casting process.

[0106] Furthermore, for the transparent cover plate 2 that does not employ a casting process, a light-shielding layer 24 and a first adhesive layer 23 can be formed on the transparent substrate 21, and then the polarizer 22 can be bonded to the first adhesive layer 23. Alternatively, for the transparent cover plate 2 that has a connecting layer 25, the polarizer 22 can be bonded to the transparent substrate 21, and then an ink layer can be formed through processes such as printing to obtain the light-shielding layer 24.

[0107] As shown in Figure 2, the transparent cover plate 2 of this disclosure integrates a transparent substrate 21 and a polarizer 22, and can be bonded to the display substrate 1 as a whole. Correspondingly, a method for manufacturing a display panel is provided. The structure of the display panel can be referred to the implementation of the display panel described above, and will not be detailed here. The manufacturing method may include steps S210-S230, wherein:

[0108] Step S210: Form a transparent cover plate.

[0109] The structure of the transparent cover plate 2 has been described in detail in the above description of the implementation method of the transparent cover plate 2 and its manufacturing method, and will not be repeated here.

[0110] Step S220: A second adhesive layer is bonded to the light-emitting side of a display substrate 1.

[0111] The second adhesive layer 3 can be a tape, which can be bonded to the light-emitting side of the display substrate 1. Alternatively, an adhesive can be applied to the light-emitting side of the display substrate 1.

[0112] Step S230: Bond the polarizer of the transparent cover plate to the second adhesive layer.

[0113] The polarizer 22 and the transparent substrate 21 can be bonded as a whole to the second adhesive layer 3, with the polarizer 22 facing the display substrate 1 and the transparent substrate 21 facing the side of the polarizer 22 away from the display substrate 1, thereby fixing the transparent cover plate 2 to the light-emitting side of the display substrate 1.

[0114] This disclosure also provides a display device, which may include the display panel of any of the above embodiments. The specific structure and beneficial effects of the display panel can be referred to the above embodiments of the display panel, and will not be described in detail here. The display device of this disclosure may be a television, tablet computer, laptop computer, vehicle display, etc., or other devices with display functions such as mobile phone and smartwatch, which will not be listed here.

[0115] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A transparent cover plate having a central region and an edge region surrounding the central region; the transparent cover plate comprising a transparent substrate, a polarizer, and a light-shielding layer; The polarizer is fixed to the transparent substrate, and the boundary of the polarizer does not exceed the boundary of the transparent substrate; the thickness of the transparent substrate is greater than that of the polarizer. The light-shielding layer is located in the edge area and surrounds the middle area, and the light-shielding layer partially overlaps with the polarizer. The elastic modulus of the transparent substrate is greater than that of the polarizer.

2. The transparent cover plate according to claim 1, wherein, The transparent cover plate further includes a first adhesive layer. The transparent substrate, the first adhesive layer and the polarizer are stacked in sequence, and the transparent substrate is bonded to the polarizer through the first adhesive layer.

3. The transparent cover plate according to claim 2, wherein, The light-shielding layer and the first adhesive layer are disposed on the same surface of the transparent substrate, and the light-shielding layer surrounds the first adhesive layer and is in contact with the first adhesive layer.

4. The transparent cover plate according to claim 2, wherein, The transparent substrate has a groove around the central area on the surface near the polarizer, and the groove extends inward from the edge of the transparent substrate; The light-shielding layer is filled in the sink, and the first adhesive layer is bonded to the area of ​​the transparent substrate surrounded by the sink and a portion of the light-shielding layer.

5. The transparent cover plate according to claim 1, wherein, The transparent substrate is provided with a receiving groove, and the polarizer is fixed in the receiving groove; the light-shielding layer overlaps with both the transparent substrate and the polarizer.

6. The transparent cover plate according to claim 1, wherein, The polarizer is stacked on one side of the transparent substrate, and the boundary of the polarizer is aligned with the boundary of the transparent substrate. The light-shielding layer is stacked on the surface of the polarizer away from the transparent substrate; The transparent cover plate also includes a connecting layer, which is stacked on the sidewalls of the transparent substrate and the polarizer and covers the gap where the polarizer and the transparent substrate meet.

7. The transparent cover plate according to claim 6, wherein, The light-shielding layer and the connecting layer are a continuous, integral structure.

8. The transparent cover plate according to claim 1, wherein, The polarizer is stacked on one side of the transparent substrate; the transparent substrate near the polarizer has a groove surrounding the central area, the groove extending inward from the edge of the transparent substrate; the light-shielding layer fills the groove and is attached to the polarizer.

9. The transparent cover plate according to claim 8, wherein, The transparent cover plate also includes a support layer, and the polarizer is sandwiched between the transparent substrate and the support layer and is attached to the support layer.

10. The transparent cover plate according to claim 8, wherein, The transparent cover plate also includes an anti-wear layer, which is stacked on the surface of the transparent substrate away from the polarizer; the hardness of the anti-wear layer is greater than the hardness of the transparent substrate.

11. The transparent cover plate according to any one of claims 1-10, wherein, The transparent substrate is made of at least one of polycarbonate, polymethyl methacrylate, polystyrene, polyimide, polyethylene terephthalate, and glass.

12. A method for manufacturing a transparent cover, comprising: A ring-shaped light-shielding layer is formed on the surface of a polarizer; A polarizer with the light-shielding layer formed thereon is placed in a cavity; A transparent material is poured into the cavity and cured to obtain a transparent substrate covering the polarizer and the light-shielding layer.

13. The manufacturing method according to claim 12, wherein, An anti-abrasion layer is formed on the surface of the transparent substrate away from the polarizer, and the hardness of the anti-abrasion layer is greater than that of the transparent substrate.

14. A display panel, comprising: Display substrate; The second adhesive layer is disposed on the light-emitting side of the display substrate and is bonded to the display substrate; The transparent cover plate according to any one of claims 1-11, wherein the polarizer is bonded to the surface of the second adhesive layer away from the display substrate.

15. A method for manufacturing a display panel, comprising: Form a transparent cover plate as described in any one of claims 1-11; A second adhesive layer is bonded to the light-emitting side of a display substrate; The polarizing film of the transparent cover is bonded to the second adhesive layer.

16. A display device comprising the display panel of claim 14.

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