CN109609044B

CN109609044B - Manufacturing method of shading adhesive tape, shading adhesive tape and display device

Info

Publication number: CN109609044B
Application number: CN201910100076.4A
Authority: CN
Inventors: 储汉奇; 郑亮亮; 张斗庆
Original assignee: BOE Technology Group Co Ltd; Hefei BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Hefei BOE Optoelectronics Technology Co Ltd
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2021-03-16
Anticipated expiration: 2039-01-31
Also published as: CN109609044A

Abstract

The embodiment of the application provides a manufacturing method of a shading adhesive tape, the shading adhesive tape and a display device, wherein the manufacturing method of the shading adhesive tape comprises the following steps: preparing a first-state shading adhesive tape, wherein the first-state shading adhesive tape comprises an aluminum-chromium alloy layer, and the base metal of the aluminum-chromium alloy layer is aluminum; and carrying out oxidation treatment on the first section of the aluminum-chromium alloy layer in the light-shielding adhesive tape in the first state to form the light-shielding adhesive tape in the second state. The aluminum-chromium alloy layer comprises aluminum and chromium, the chromium can accelerate the oxidation process of the aluminum, the color of the oxidized first section of the aluminum-chromium alloy layer is darkened, the light reflection rate of the first section of the aluminum-chromium alloy layer is reduced, the light reflection effect is weakened, the intensity of reflected light of the aluminum-chromium alloy layer is greatly reduced, the bright lines at the edge of the shading tape are obviously weakened, the display effect of the display device is improved, and the user experience is improved.

Description

Manufacturing method of shading adhesive tape, shading adhesive tape and display device

Technical Field

The application relates to the technical field of shading adhesive tapes, in particular to a manufacturing method of a shading adhesive tape, a shading adhesive tape and a display device.

Background

The light-shielding tape can be applied to a display device, and is usually attached to the edge around the light-emitting surface of the substrate assembly in the display panel module. The shading sticky tape can play the effect of shading and fixed display panel module on the one hand, and on the other hand can also lead away the static on the base plate subassembly.

The display panel module further comprises a polaroid, the polaroid is attached to the light-emitting surface of the substrate assembly, one section of the shading adhesive tape is right opposite to the side surface of the polaroid, and in the prior art, the section of the shading adhesive tape can reflect part of light emitted by the polaroid, so that bright lines appear at the edge of the shading adhesive tape, and the display effect of the display device is influenced.

Disclosure of Invention

The application provides a manufacturing method of a shading adhesive tape, the shading adhesive tape and a display device aiming at the defects of the existing mode, and aims to solve the technical problem that the edge of the shading adhesive tape is easy to appear bright lines to influence the display effect of the display device in the prior art.

In a first aspect, an embodiment of the present application provides a method for manufacturing a light-shielding tape, including: preparing a first-state shading adhesive tape, wherein the first-state shading adhesive tape comprises an aluminum-chromium alloy layer, and the base metal of the aluminum-chromium alloy layer is aluminum; and carrying out oxidation treatment on the first section of the aluminum-chromium alloy layer in the light-shielding adhesive tape in the first state to form the light-shielding adhesive tape in the second state.

In a second aspect, an embodiment of the present application provides a light-shielding tape, which includes an aluminum-chromium alloy layer, where a first cross section of the aluminum-chromium alloy layer is subjected to oxidation treatment by the manufacturing method of the light-shielding tape provided in the first aspect of the embodiment of the present application.

In a third aspect, an embodiment of the present application provides a display device, including a substrate module, a first polarizer, and the light-shielding tape provided in the second aspect of the present application; the bottom surface of the first polaroid is attached to the light emergent area of the substrate module; the first part of the shading adhesive tape is attached to the shading area of the substrate module; the first section of the aluminum-chromium alloy layer in the shading adhesive tape is opposite to one side surface of the first polaroid.

The technical scheme provided by the embodiment of the application has the following beneficial technical effects:

in the manufacturing method of the light-shielding tape provided by the embodiment of the application, the aluminum-chromium alloy layer comprises two metals of aluminum and chromium, and the chromium can accelerate the oxidation process of aluminum, the color of the oxidized first section of the aluminum-chromium alloy layer is deepened, the light reflection rate of the first section of the aluminum-chromium alloy layer is reduced, the light reflection effect is weakened, the intensity of the reflected light of the aluminum-chromium alloy layer is greatly reduced, the bright lines at the edge of the light-shielding tape are obviously weakened, the display effect of the display device is improved, and the user experience is improved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic flow chart of a method for manufacturing a light-shielding tape according to an embodiment of the present disclosure;

fig. 2 is a schematic flow chart of an extended manufacturing method of a light-shielding tape according to an embodiment of the present application;

fig. 3 is a schematic structural view of a light-shielding tape according to an embodiment of the present disclosure;

fig. 4 is a schematic state diagram of a manufacturing process of a light-shielding tape according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;

in the figure:

1-shading adhesive tape; 11-an aluminum chromium alloy layer; 12-an ink layer; 13-a conductive adhesive layer; 2-a substrate module;

3-a first polarizer; 4-a second polarizer; 5-a backlight assembly; 6-a back plate; 100-sealing the box.

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

The inventors of the present application have found that in order to provide the light-shielding tape with a conductive function, the light-shielding tape generally needs to be provided with a conductive cloth or a metal layer, and the metal layer may be selected from an aluminum foil or a copper foil. The shading adhesive tape generally needs to be cut to have a proper shape and size, the metal layer of the shading adhesive tape can be cut due to cutting, the section of the metal layer is flat and smooth, and the metal layer has a good light reflection effect, so that the brightness is high, and the light reflection phenomenon of the section of the aluminum foil is more obvious.

When the shading adhesive tape with the aluminum foil is attached to the edge around the light-emitting surface of the substrate assembly in the display panel module, one section of the shading adhesive tape is just opposite to the side surface of the polaroid, because the section reflection rate of the aluminum foil is higher, most of light emitted from the polaroid and irradiated on the section of the metal layer can be reflected to the gap between the polaroid and the aluminum foil, when the display device is seen at a large visual angle, a bright line formed by the section emission light of the aluminum foil can be seen at the edge of the shading adhesive tape, the display effect of the display device can be influenced, and the watching experience of a user is reduced.

Based on the above findings, the inventors of the present application considered that the reason why the edge of the light-shielding tape is prone to appear bright lines is that the section of the aluminum foil has a high light reflectivity, and most of the light irradiated on the section is emitted back. If the light reflection rate of the section of the aluminum foil is reduced after the shading adhesive tape is cut, the problem of bright lines can be solved to a greater extent.

Based on the above reasons, an embodiment of the present application provides a method for manufacturing a light-shielding tape, where a flow diagram of the method is shown in fig. 1, and the method includes:

s1: the light-shielding tape 1 in the first state is prepared, the light-shielding tape 1 in the first state comprises an aluminum-chromium alloy layer 11, and the base metal of the aluminum-chromium alloy layer is aluminum.

Alternatively, the light-shielding tape 1 in the first state including the aluminum chromium alloy layer 11 is prepared, including: doping a preset amount of chromium into aluminum to form an aluminum-chromium alloy layer 11; arranging an ink layer 12 and a conductive adhesive layer 13 on two bottom surfaces of the aluminum-chromium alloy layer 11 respectively to obtain a shading adhesive tape component; and cutting the shading tape assembly to form at least one first-state shading tape 1.

It will be understood by those skilled in the art that the light shielding tape assembly may be a light shielding tape having a larger size, and at least one light shielding tape 1 in a first state having a suitable shape and size is cut out from the light shielding tape assembly.

It should be noted that the step S1 is different from the prior art in that the aluminum-chromium alloy layer 11 in the light-shielding tape 1 in the first state includes two metals of aluminum and chromium, whereas the metal layer of the light-shielding tape 1 in the prior art is based on a single type of aluminum or copper. Those skilled in the art will understand that other specific steps in step S1 are similar to those in the prior art, and are not described in detail herein.

S2: the first section of the aluminum-chromium alloy layer 11 in the light-shielding tape 1 in the first state is oxidized to form the light-shielding tape 1 in the second state.

Optionally, in the manufacturing method of the light-shielding tape provided in the embodiment of the present application, the oxidizing a first cross section of the aluminum-chromium alloy layer 11 in the light-shielding tape 1 in the first state includes: the end of the first light-shielding tape 1 is placed in a preset acid environment, and the end includes the first section of the aluminum-chromium alloy layer 11, so that the first section of the aluminum-chromium alloy layer 11 is oxidized.

It should be noted that after the light-shielding tape 1 in the first state is cut, the aluminum-chromium alloy layer 11 has at least one cross section, and the first cross section in this application refers to a cross section that is required to be aligned with the side surface of the first polarizer 3 when the light-shielding tape 1 is attached to the light-emitting surface of the substrate assembly.

Although the first section of the metal layer using a single type of metal as a base is naturally oxidized in air in the prior art, the reflective effect of the oxidized first section is not significantly reduced, for example, for the metal layer using aluminum as a base, pure aluminum is generally silver white, and when aluminum is oxidized in air, a white oxide layer is formed on the surface of the aluminum, so that the reflective layer still has a high reflective rate and a good reflective effect.

In the manufacturing method of the light-shielding tape provided by the embodiment of the application, the aluminum-chromium alloy layer 11 includes two metals, namely aluminum and chromium, and the chromium can accelerate the oxidation process of aluminum, and the color of the oxidized first section of the aluminum-chromium alloy layer 11 is darkened, so that the light reflection rate of the first section of the aluminum-chromium alloy layer 11 is reduced, the light reflection effect is weakened, the intensity of the light reflected by the aluminum-chromium alloy layer 11 is reduced to a greater extent, the bright line at the edge of the light-shielding tape is obviously weakened, the display effect of a display device is improved, and the user experience is improved.

The embodiment of the application further provides an extended manufacturing method of the light-shielding adhesive tape, and a flow schematic diagram of the method is shown in fig. 2, and the method includes:

s11: a predetermined amount of chromium is doped into aluminum to form an aluminum-chromium alloy layer 11.

It will be understood by those skilled in the art that in the aluminum-chromium alloy layer 11, the base metal of the aluminum-chromium alloy layer 11 is aluminum, aluminum is the major part, chromium is the minor part, and the ratio of aluminum to chromium can be determined according to actual needs. The formed aluminum-chromium alloy layer 11 is in the form of a foil, and the thickness of the aluminum-chromium alloy layer 11 can be determined according to actual needs.

S12: and respectively arranging an ink layer 12 and a conductive adhesive layer 13 on two bottom surfaces of the aluminum-chromium alloy layer 11 to obtain the shading adhesive tape assembly.

In the light-shielding tape 1 shown in fig. 3, an ink layer 12 and a conductive adhesive layer 13 are respectively disposed on the upper and lower bottom surfaces of the aluminum-chromium alloy layer 11. Of course, a layer of conductive adhesive layer 13 may be further disposed on the ink layer 12. The layer structure of the shading adhesive tape component can be determined according to actual needs. The specific steps of step S12 are similar to those in the prior art, and are not described in detail in this specification.

S13: and cutting the shading tape assembly to form at least one first-state shading tape 1.

It will be understood by those skilled in the art that the light shielding tape assembly may be a light shielding tape 1 having a larger size, and at least one light shielding tape 1 of a first state having a suitable shape and size is cut out from the light shielding tape assembly. The specific steps of step S13 are similar to those in the prior art, and are not described in detail in this specification.

S14: the end of the first light-shielding tape 1 is placed in a preset acid environment, and the end includes the first section of the aluminum-chromium alloy layer 11, so that the first section of the aluminum-chromium alloy layer 11 is oxidized.

In an acid environment, chromium on the first section of the aluminum-chromium alloy layer 11 forms a chromium solution in a preset acid environment, aluminum on the first section of the aluminum-chromium alloy layer 11 contacts with the chromic acid solution to perform anodic oxidation, so that a chromic acid anodic oxide film of aluminum is formed on the first section of the aluminum-chromium alloy layer 11, and the oxide film has a gray color, a low light reflection rate and a weak light reflection effect.

In order to largely protect other portions of the light-shielding tape 1 from the acidic environment, optionally, placing the end portion of the light-shielding tape 1 in the first state into a preset acidic environment includes: laminating a plurality of first-state light-shielding adhesive tapes 1, and arranging the first sections of the aluminum-chromium alloy layers 11 in the first-state light-shielding adhesive tapes 1 on the same side; the end parts of a plurality of laminated light-shielding adhesive tapes 1 in the first state are placed in a preset acid environment, and the end parts comprise first sections of the aluminum-chromium alloy layers 11.

Taking fig. 4 as an example, a plurality of light-shielding tapes 1 in a first state are stacked, and the first cross sections of the light-shielding tapes 1 in the first state are aligned on the same side, and then the end portions of the stacked light-shielding tapes 1 in the first state are placed in a sealed box 100, where the end portions include the first cross section of the aluminum-chromium alloy layer 11, and the inside of the sealed box 100 is a preset acidic environment. Since the bottom surface of each light shielding tape 1 in the first state is closely attached to the bottom surface of the light shielding tape 1 in the adjacent first state, the bottom surface of the light shielding tape 1 in the first state can be prevented from contacting the air in the sealing box 100, thereby largely protecting the bottom surface of the light shielding tape 1 from the influence of an acidic environment.

In addition, the end portions of the plurality of light-shielding tapes 1 in the first state stacked one on another are placed in the sealing box 100 at a time, so that the first cross sections of the aluminum-chromium alloy layers 11 in the plurality of light-shielding tapes 1 in the first state can be oxidized at the same time, and the working efficiency is improved.

Optionally, the predetermined acidic environment comprises an enclosed space having a predetermined humidity value, and the enclosed space contains a predetermined concentration value of sulfur dioxide.

Taking fig. 4 as an example, the enclosed space may be an internal space of the sealed box 100, the humidity of the internal space of the sealed box 100 may be 90%, and the concentration value of the sulfur dioxide may be determined according to actual needs. Under this environment, chromium may be converted to a chromic acid solution.

Optionally, in the manufacturing method of the light-shielding tape provided in the embodiment of the present application, the time of the oxidation treatment is 20 to 60 minutes, and the temperature of the oxidation treatment is 30 to 50 degrees celsius.

Generally, the time and temperature of the oxidation treatment are inversely related to the concentration of the acidic solution, i.e., the higher the concentration of the acidic solution, the shorter the time of the oxidation treatment and the lower the temperature requirement.

Based on the same inventive concept, the embodiment of the present application further provides a light-shielding tape 1, which includes an aluminum-chromium alloy layer 11, and a first section of the aluminum-chromium alloy layer 11 is subjected to oxidation treatment by the manufacturing method of the light-shielding tape provided by the embodiment of the present application. In the aluminum-chromium alloy layer 11, aluminum is a base metal, aluminum occupies a majority, chromium occupies a minority, and the ratio of aluminum to chromium can be determined according to actual needs.

Optionally, the masking tape 1 provided in the embodiment of the present application further includes an ink layer 12 and a conductive adhesive layer 13. The ink layer 12 of the aluminum-chromium alloy layer 11 and the conductive adhesive layer 13 are respectively disposed on two bottom surfaces of the aluminum-chromium alloy layer 11.

In the light-shielding tape 1 shown in fig. 3, an ink layer 12 and a conductive adhesive layer 13 are respectively disposed on the upper and lower bottom surfaces of the aluminum-chromium alloy layer 11. Of course, a layer of the electric glue layer may be further disposed on the ink layer 12. The layer structure of the shading adhesive tape component can be determined according to actual needs.

Based on the same inventive concept, the embodiment of the present application further provides a display device, which includes a substrate module 2, a first polarizer 3, and the light-shielding tape 1 provided in the embodiment of the present application. The bottom surface of the first polarizer 3 is attached to the light-emitting surface of the substrate module 2, the first part of the light-shielding tape 1 is attached to the light-shielding surface of the substrate module 2, and the first section of the aluminum-chromium alloy layer 11 in the light-shielding tape 1 is opposite to one side surface of the first polarizer 3.

It should be noted that the light exit area of the substrate module 2 refers to an area of the substrate module 2 for displaying images, the light shielding area is used for attaching a light shielding tape, and the light shielding area of the substrate module 2 is disposed at the periphery of the light exit area. For example, the light exit area is disposed at the center, and the light shielding area is disposed around the light exit area.

Optionally, the display device provided in this embodiment of the present application further includes a second polarizer 4, a backlight unit 5, and a back plate 6. The second polarizer 4, the backlight source assembly 5 and the back plate 6 are sequentially arranged on one side of the substrate module 2 far away from the first polarizer 1. The second part of the shading tape 1 is attached to one surface of the back plate far away from the backlight source assembly 5. Taking fig. 5 as an example, the first polarizer 3, the substrate module 2, the second polarizer 4, the backlight module 5 and the back plate 6 are sequentially stacked, and the second portion of the light-shielding tape 1 is attached to the light-emitting surface of the substrate module 2, and the second portion is attached to the sidewall of the back plate 6.

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

1. in the manufacturing method of the light-shielding tape provided by the embodiment of the application, the aluminum-chromium alloy layer comprises two metals of aluminum and chromium, and the chromium can accelerate the oxidation process of aluminum, the color of the oxidized first section of the aluminum-chromium alloy layer is deepened, the light reflection rate of the first section of the aluminum-chromium alloy layer is reduced, the light reflection effect is weakened, the intensity of the reflected light of the aluminum-chromium alloy layer is greatly reduced, the bright lines at the edge of the light-shielding tape are obviously weakened, the display effect of the display device is improved, and the user experience is improved.

2. In the manufacturing method of the light-shielding tape provided by the embodiment of the application, the end portions of the plurality of first-state light-shielding tapes which are stacked together can be placed in the sealed box at one time, and because the bottom surface of each first-state light-shielding tape is tightly attached to the bottom surface of the adjacent first-state light-shielding tape, the bottom surface of the first-state light-shielding tape can be prevented from contacting with air in the sealed box, so that the bottom surface of the light-shielding tape is protected from an acidic environment to a greater extent. In addition, the first sections of the aluminum-chromium alloy layers in the plurality of first-state light-shielding adhesive tapes can be oxidized at the same time, so that the working efficiency is improved.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

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 invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

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 invention, "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 meanings of the above terms in the present invention can be understood in specific cases to those skilled 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.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

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.

Claims

1. A manufacturing method of a shading adhesive tape is characterized by comprising the following steps: preparing a shading adhesive tape with an aluminum-chromium alloy layer in a first state, wherein the shading adhesive tape with the first state comprises the aluminum-chromium alloy layer, and the base metal of the aluminum-chromium alloy layer is aluminum;

carrying out oxidation treatment on a first section of the aluminum-chromium alloy layer in the shading adhesive tape in the first state to form a shading adhesive tape in a second state; the step of oxidizing the first section of the aluminum-chromium alloy layer in the light-shielding tape in the first state comprises the following steps: placing the end part of the shading adhesive tape in the first state into a preset acid environment, wherein the end part comprises the first section of the aluminum-chromium alloy layer, so that the first section of the aluminum-chromium alloy layer is oxidized; the preset acidic environment comprises a closed space with a preset humidity value, and sulfur dioxide with a preset concentration value is contained in the closed space; the time of the oxidation treatment is 20 to 60 minutes, and the temperature of the oxidation treatment is 30 to 50 ℃.

2. The method according to claim 1, wherein the placing the end of the first state of the light-shielding tape into a predetermined acidic environment comprises:

stacking a plurality of first-state light-shielding adhesive tapes, and arranging first sections of the aluminum-chromium alloy layers in the light-shielding adhesive tapes in the first states at the same side;

and placing the end parts of the plurality of the laminated light-shielding adhesive tapes in the first state into a preset acid environment, wherein the end parts comprise the first section of the aluminum-chromium alloy layer.

3. The method according to claim 1, wherein the preparing the light-shielding tape in the first state comprises:

doping a preset amount of chromium into the aluminum to form the aluminum-chromium alloy layer;

respectively arranging an ink layer and a conductive adhesive layer on two bottom surfaces of the aluminum-chromium alloy layer to obtain a shading adhesive tape assembly;

and cutting the shading adhesive tape assembly to form at least one first-state shading adhesive tape.

4. A light-shielding tape comprising an aluminum chromium alloy layer, wherein a first cross section of the aluminum chromium alloy layer is subjected to oxidation treatment by the method for producing a light-shielding tape according to any one of claims 1 to 3.

5. The light-shielding tape according to claim 4, further comprising: an ink layer and a conductive adhesive layer,

the ink layer and the conductive adhesive layer of the aluminum-chromium alloy layer are respectively arranged on two bottom surfaces of the aluminum-chromium alloy layer.

6. A display device comprising a substrate module, a first polarizer and the light-shielding tape of claim 4 or 5;

the bottom surface of the first polaroid is attached to the light emergent area of the substrate module; the first part of the shading adhesive tape is attached to the shading area of the substrate module; and the first section of the aluminum-chromium alloy layer in the shading adhesive tape is opposite to one side surface of the first polaroid.

7. The display device according to claim 6, further comprising a second polarizer, a backlight unit, and a back sheet;

the second polaroid, the backlight source assembly and the back plate are sequentially arranged on one side of the substrate module, which is far away from the first polaroid;

the second part of the shading adhesive tape is attached to one surface of the back plate, which is far away from the backlight source assembly.