CN110517584B - Display module, display device and preparation method of display module - Google Patents

Display module, display device and preparation method of display module Download PDF

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Publication number
CN110517584B
CN110517584B CN201910822894.5A CN201910822894A CN110517584B CN 110517584 B CN110517584 B CN 110517584B CN 201910822894 A CN201910822894 A CN 201910822894A CN 110517584 B CN110517584 B CN 110517584B
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display module
light
display
conductive metal
metal layer
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CN201910822894.5A
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CN110517584A (en
Inventor
朱建国
刘芳怡
张罗
刘嘉真
郑仰利
王耀东
孙宏轩
印思琪
李亦哲
景奇
孙兴盼
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Optoelectronics Technology Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Abstract

The invention provides a display module, a display device and a preparation method of the display module. This display module assembly includes: the display panel comprises a display area and a connecting area positioned outside the display area, wherein a grounding connecting end is arranged on the connecting area; the light-transmitting sheet is positioned on the light emitting side of the display panel and comprises an extending part, and the extending part is positioned in the connecting area in the orthographic projection of the plane where the connecting area is positioned; and a conductive metal layer is filled between the extension part and the connection region and is connected with the ground connection end. The display module is provided with the extending part on the transparent sheet, and the conductive metal layer is filled between the extending part and the connecting area of the display panel, so that the problem of separation between the transparent sheet and the conductive metal layer after shrinkage can be avoided.

Description

Display module, display device and preparation method of display module
Technical Field
The invention relates to the technical field of display, in particular to a display module, a display device and a preparation method of the display module.
Background
With the continuous development of electronic product technology, the requirements of electronic equipment on a display screen are higher and higher, so that the reliability test of products is tighter and tighter.
At present, In a Touch Display module of a Touch and Display Driver Integration (TDDI) and In-cell structure, a silver paste is usually required to be connected between a ground terminal of a Display panel and a transparent sheet (usually an upper polarizer) provided with a conductive layer and conductive particles for releasing static electricity generated on a surface of a Display screen In a use process, so as to prevent the Touch Display module from displaying abnormally due to the static electricity.
The conventional technology usually adopts line silver thick liquid, two segmentation or two point type silver thick liquid to be connected with last polaroid contact, however, in actual electronic equipment's use, go up the polaroid and can take place the shrink under the high temperature condition, lead to producing the clearance between polaroid and the silver thick liquid for static on the display screen can't pass through silver thick liquid release, thereby causes the problem of abnormal display.
Disclosure of Invention
The technical scheme of the invention aims to provide a display module, a display device and a preparation method of the display module, which are used for solving the problem that in the display module in the prior art, due to the fact that a light transmitting sheet connected with grounding silver paste contracts, a gap is generated between the light transmitting sheet and the grounding silver paste, static electricity cannot be released, and abnormal display is caused.
The embodiment of the invention provides a display module, which comprises:
the display panel comprises a display area and a connecting area positioned outside the display area, wherein a grounding connecting end is arranged on the connecting area;
the light-transmitting sheet is positioned on the light emitting side of the display panel and comprises an extending part, and the extending part is positioned in the connecting area in the orthographic projection of the plane where the connecting area is positioned;
and a conductive metal layer is filled between the extension part and the connection region and is connected with the ground connection end.
Optionally, the display module, wherein the ground connection end is located in a coverage area of the orthographic projection on the connection area.
Optionally, the display module, wherein the display module further includes:
the driving chip is arranged on the connecting area; the two opposite sides of the driving chip along a preset direction are respectively provided with the grounding connecting ends on the connecting area;
the conductive metal layer comprises two sub-parts which are respectively positioned at two opposite sides of the driving chip along the preset direction, and each sub-part is respectively connected with the grounding connection end at the side.
Optionally, the display module, wherein an orthogonal projection of the extension portion on a plane where the connection region is located covers an orthogonal projection of the two sub-portions on a plane where the connection region is located, and the extension portion is not overlapped with an orthogonal projection of the driving chip on a plane where the connection region is located.
Optionally, the display module, wherein the display module further includes:
a cover plate covering the light emitting side of the light transmitting sheet;
the cover plate is connected with the light-transmitting sheet through an optical adhesive layer, and the orthographic projection of the optical adhesive layer on the plane where the light-transmitting sheet is located comprises a part overlapped with the extending part.
Optionally, the display module, wherein an orthographic projection of the optical adhesive layer on a plane where the light-transmitting sheet is located overlaps with the whole light-transmitting sheet.
Optionally, the display module includes a color filter substrate and an array substrate, which are disposed opposite to each other, wherein the color filter substrate is disposed on a light exit side of the array substrate, and a portion of the array substrate protruding from the color filter substrate is formed as the connection region;
the end face of the conductive metal layer, which is far away from the array substrate, and the end face of the color film substrate, which is far away from the array substrate, are located on the same plane.
Optionally, the display module is integrated with a touch module on the display panel, the transparent sheet is an upper polarizer, and the display module further includes a lower polarizer located on the non-light-emitting side of the display panel.
The embodiment of the invention also provides a display device, which comprises the display module.
The embodiment of the invention also provides a preparation method applied to the display module, wherein the method comprises the following steps:
preparing a display panel, wherein a grounding connection end is arranged on a connection area of the display panel;
coating a conductive metal layer on the connection region, and connecting the conductive metal layer with the ground connection terminal;
and covering the light-transmitting sheet including the extension part on the display panel, so that the orthographic projection of the extension part on the plane of the connection area is positioned on the connection area.
Optionally, the preparation method further includes, after the preparing the display panel:
coating a protective adhesive layer on the connecting area except the grounding connecting end;
and in the step of coating the conductive metal layer on the connection area, coating the conductive metal layer on the protective adhesive layer.
At least one of the above technical solutions of the specific embodiment of the present invention has the following beneficial effects:
according to the display module provided by the embodiment of the invention, the extending part is arranged on the light-transmitting sheet which is positioned on the light-emitting side of the display panel and can be used for electrostatic discharge, and the conductive metal layer is filled between the extending part and the connecting area of the display panel, so that the contact area between the light-transmitting sheet and the conductive metal layer used for grounding connection is increased, the problem of separation between the light-transmitting sheet and the conductive metal layer after shrinkage is avoided, the electrostatic generated in the use process of the display module can be ensured to be discharged through the light-transmitting sheet, the conductive metal layer and the grounding connecting end, and abnormal display caused by the electrostatic is avoided.
Drawings
FIG. 1 is a schematic cross-sectional view of a display module according to a conventional technique;
fig. 2 is a schematic plan view of a display module according to an embodiment of the invention;
fig. 3 is a schematic cross-sectional structure diagram of a display module according to an embodiment of the invention;
FIG. 4 is a schematic view illustrating a process of the display module according to the embodiment of the invention;
FIG. 5 is a schematic view of a partial structure of a light-transmitting sheet according to an embodiment of the present invention;
FIG. 6 is a second schematic process diagram of the display module according to the embodiment of the invention;
FIG. 7 is a third schematic process diagram of a display module according to an embodiment of the invention;
fig. 8 is a fourth schematic process diagram of the display module according to the embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic cross-sectional view of a display module according to a conventional technique. Referring to fig. 1, a display module according to the conventional technology includes an array substrate 1 and a color filter substrate 2, which are oppositely disposed, wherein a portion of the array substrate 1 extending from the color filter substrate 2 forms a connection region, which may also be referred to as a single layer region, for connecting and disposing a driving chip and a flexible circuit board. In addition, an upper polarizer 3 is arranged on the light emergent side of the color film substrate 2, and a lower polarizer 4 is arranged on the opposite side of the light emergent side of the array substrate 1; when the upper polarizer 3 is connected with the ground connection end arranged on the connection region through the conductive metal, the static electricity generated on the surface of the display screen can be released by using the upper polarizer 3, the conductive metal 5 and the ground connection end.
In order to solve the problem of the conventional display module, in order to release the static electricity generated on the surface of the display screen, a grounded silver paste, a two-section or two-point silver paste is usually used to contact and connect with the upper polarizer, however, the upper polarizer shrinks at high temperature, which causes the separation of the silver paste and the upper polarizer, so that static electricity cannot be released, thereby causing abnormal display problems, embodiments of the present invention provide a display module, by providing the light-transmitting sheet located on the light-emitting side of the display panel for electrostatic discharge with an extension portion, a conductive metal layer is filled between the extending part and the connection region of the display panel, so that the contact area between the light-transmitting sheet and the conductive metal layer for ground connection is increased, thereby avoid the light-transmitting piece after the shrink and the problem of breaking away from between the conductive metal layer, the static that produces can release through light-transmitting piece, conductive metal layer and ground connection link in the display module assembly use.
Referring to fig. 2 and 3, an embodiment of the invention provides a display module, including:
a display panel 100 including a display region 101 and a connection region 102 located outside the display region 101, wherein the connection region 102 is provided with a ground connection terminal;
a light transmissive sheet 200 positioned at the light exit side of the display panel 100, the light transmissive sheet 200 comprising an extension portion 210, the extension portion 210 being positioned in the connection region 102 in an orthographic projection of the plane in which the connection region 102 is positioned;
the conductive metal layer 300 is filled between the extension portion 210 and the connection region 102, and the conductive metal layer 300 is connected to the ground connection terminal.
In the embodiment of the present invention, one side of the conductive metal layer 300 is in contact connection with the extension portion 210 of the light transmissive sheet 200, and the other side thereof can be in contact connection with the ground connection terminal of the connection region 102 of the display panel 100; the transparent sheet 200 is a transparent sheet including a conductive layer and conductive particles, such as an optional upper polarizer, and can be used for electrostatic discharge. It should be noted that the light-transmitting sheet 200 is not limited to be only an upper polarizer, as long as it can be connected to the conductive metal layer to achieve electrostatic discharge, such as a glass film provided with a conductive layer.
Further, in an embodiment of the invention, as shown in fig. 2 and fig. 3, the display panel 100 includes an array substrate 110 and a color filter substrate 120 that are oppositely disposed, and the color filter substrate 120 is disposed on the array substrate 110, wherein a portion of the array substrate 110 that extends and protrudes relative to the color filter substrate 120 is formed as a connection region 102. It can be understood that the area of the display panel 100 corresponding to the color filter substrate 120 is the display area 101.
Optionally, In the embodiment of the present invention, a touch module is integrated on the display panel 100, and the display module In the embodiment of the present invention may be a touch display module with a TTDI or In-cell structure.
As shown in fig. 2 and 4, the connection region 102 is used for disposing the display control driver chip 400 and the flexible wiring board 500, and the connection region 102 is provided with a ground connection terminal 103 for ground connection.
In the embodiment of the invention, on the connection region 102, the two opposite sides of the driving chip 400 along the predetermined direction are respectively provided with the ground connection terminals 103. Optionally, the preset direction is a length extending direction of the driving chip 400. It is understood that the connection region 102 is generally in a long bar shape on the array substrate 110, and the driving chip 400 is also in a long bar shape. When disposed on the connection region 102, the length extending direction of the driving chip 400 is disposed according to the length extending direction of the connection region 102. In the embodiment of the present invention, the flexible circuit board 500 is disposed on one side of the driving chip 400 away from the display area, and two grounding connection ends 103 are disposed on two sides along the length direction.
With the above-mentioned implementation structure, as shown in fig. 2 and fig. 4, in the display module according to the embodiment of the invention, the conductive metal layer 300 includes two sub-portions 310 respectively located at two opposite sides of the driving chip 400 along the predetermined direction, and each sub-portion 310 is respectively connected to the ground connection terminal 103 at the side where the sub-portion is located.
As further shown in fig. 2 and 4, in the embodiment of the present invention, the ground connection terminal 103 is located on the connection region 102 within the coverage of the extended portion 210 of the light-transmissive sheet 200 in the orthogonal projection of the plane where the connection region 102 is located. That is, specifically, the orthographic projection of the extension portion 210 of the light-transmissive sheet 200 on the plane of the connection region 102 can cover the ground connection terminal 103.
Based on the above-mentioned implementation structure, when two opposite sides of the driving chip 400 along the predetermined direction are respectively provided with one ground connection terminal 103, the orthographic projection of the extension portion 210 of the light-transmitting sheet 200 on the plane of the connection region 102 covers the orthographic projection of the two sub-portions 310 of the conductive metal layer 300 on the plane of the connection region 102, and the orthographic projection of the driving chip 400 on the plane of the connection region 102 does not overlap.
As shown in fig. 5, the light-transmitting sheet 200 includes a base 220 and an extension 210 protruding with respect to the base 220. As shown in fig. 2, the base 220 of the light-transmissive sheet 200 is disposed corresponding to the display region 101 of the display panel, and the extension portion 210 of the light-transmissive sheet 200 is disposed corresponding to two sub-portions 310 of the conductive metal layer 300 on the connection region 102. Specifically, the light transmissive sheet 200 includes two extending portions 210 protruding from the base 220, and when the light transmissive sheet 200 is covered on the display panel 100, an orthogonal projection of the base 220 of the light transmissive sheet 200 on a plane where the connection region 102 is located overlaps the display region 101 of the array substrate 110; the orthographic projections of the two extending portions 210 on the plane of the connecting region 102 respectively cover the orthographic projections of the two sub-portions 310 of the conductive metal layer 300 on the plane of the connecting region 102, and optionally, the two extending portions can also respectively cover the ground connecting terminals 103 on the two sides of the driving chip 400.
Compared with the conventional technology in which the size of the light-transmitting sheet for electrostatic discharge is set according to the display area of the display panel, and the grounding silver paste is connected with the light-transmitting sheet in a line segment type, a two-segment type or a two-point type, the display module provided by the embodiment of the invention has the advantages that the extending part is arranged on the light-transmitting sheet, so that the conductive metal layer can be filled between the extending part and the connecting area of the display panel, the contact area between the light-transmitting sheet and the conductive metal layer for grounding connection can be increased, and the problem of separation between the light-transmitting sheet and the conductive metal layer after shrinkage is avoided.
As further shown in fig. 2 and 3, the display module according to the embodiment of the present invention further includes:
a cover plate 600 covering the light emitting side of the light transmitting sheet 200;
the cover 600 is connected to the light-transmitting sheet 200 through the optical adhesive layer 700, and an orthogonal projection of the optical adhesive layer 700 on a plane where the light-transmitting sheet 200 is located includes a portion overlapping the extending portion 210.
Optionally, an orthographic projection of the optical adhesive layer 700 on the plane of the light-transmissive sheet 200 overlaps the whole light-transmissive sheet 200.
With the above-mentioned implementation structure, the optical adhesive layer 700 between the light transmissive sheet 200 and the cover plate 600 includes a portion corresponding to the extension portion 210 of the light transmissive sheet 200, that is, the shape of the optical adhesive layer 700 may also include two protruding portions 710 disposed between the extension portion 210 of the light transmissive sheet 200 and the cover plate 600, as shown in fig. 5, corresponding to the base portion of the corresponding display region.
It should be noted that, in the embodiment of the present invention, as shown in fig. 2 and fig. 3, a protective adhesive layer 800 is further disposed on the connection region 102 and between the conductive metal layer 300 and the connection region 102, so as to protect the connection region 102.
In addition, the end surface of the conductive metal layer 300 away from the array substrate 110 and the end surface of the color filter substrate 120 away from the array substrate 110 are located on the same plane. That is, specifically, the specific thickness of the conductive metal layer 300 disposed on the protective adhesive layer 800 is determined according to the height of the color filter substrate 120.
As shown in fig. 3, in the display module according to the embodiment of the invention, the extending portion 210 disposed on the light-transmitting sheet 200 is used to increase the contact area between the light-transmitting sheet 200 and the conductive metal layer 300 for ground connection, and the conductive metal layer 300, the extending portion 210 of the light-transmitting sheet 200 and the protruding portion 710 of the optical adhesive layer 700 are filled between the connection region 102 and the cover plate 600, so as to further support the cover plate 600. Compared with the conventional technology, the gap between the cover plate and the connecting area is filled by attaching foam or coating silicone adhesive, the mode of supporting effect is achieved, the implementation structure is adopted, the purpose of improving the reliability of the display module product can be improved, meanwhile, the production efficiency and the production cost of the display module product can be improved, and the competitive effect of the display module product on the market is improved.
Referring to fig. 2, 3, 4, and 6 to 8, a manufacturing process of the display module according to the embodiment of the invention includes the following steps:
1) preparing a display panel 100; wherein the connection region 102 of the display panel 100 is provided with a ground connection terminal 103;
in the preparation of the display panel 100, a large panel including a plurality of connected display panels 100 may be prepared through a plurality of processes, and the large panel may be cut to separate the plurality of prepared display panels 100, thereby obtaining a plurality of independent display panels 100. The process of manufacturing the display panel will be understood by those skilled in the art and will not be described in detail herein.
2) As shown in fig. 4, the driving chip 400 for controlling display and the flexible wiring board 500 are bound on the connection region 102;
alternatively, the driver chip 400 and the flexible wiring board 500 may be bonded to the connection region 102 by an Anisotropic Conductive Film (ACF).
3) As shown in fig. 6, a protective adhesive layer 800 is coated on the connection region 102 and is ensured to avoid the ground connection terminal 103 on the connection region 102;
4) as shown in fig. 7, on the connection region 102, the conductive metal layer 300 is coated and formed on both sides of the driving chip 400, and the conductive metal layer 300 is ensured to be connected to the ground connection terminal 103 on the side, so as to ensure the grounding performance of the conductive metal layer 300 and the display panel 100;
5) as shown in fig. 8, a light-transmitting sheet 200 (an upper polarizer in the embodiment of the present invention) with an extension portion 210 formed thereon is attached to a color filter substrate of the display panel 100; in the embodiment of the present invention, since the end surface of the conductive metal layer 300 away from the array substrate 110 and the end surface of the color film substrate 120 away from the array substrate 110 are located on the same plane, it can be ensured that the conductive metal layer 300 is filled between the connection region 102 of the display panel 100 and the light-transmitting sheet 200, and can be connected to the light-transmitting sheet 200;
6) as shown in fig. 2 and 3, the light-transmitting sheet 200 and the cover plate 600 are adhered together by the optical adhesive layer 700 formed with the protruding portion 710, so that the gap between the cover plate 600 and the connection region 102 of the display panel 100 is filled by the conductive metal layer 300, the extending portion 210 of the light-transmitting sheet 200 and the protruding portion 710 of the optical adhesive layer 700 at both sides of the driving chip 400, thereby achieving a supporting function;
7) the finished display module can be further manufactured by attaching the lower polarizer to the opposite side (non-light-emitting side) of the light-emitting surface of the array substrate 110.
In the embodiment of the present invention, the conductive metal layer 300 may be a silver material.
In the display module of the embodiment of the invention, the transparent sheet 200 with the extension part 210 is attached to the color film substrate of the display panel, so that the filling effect of the conductive metal layer 300 for electrostatic discharge between the connection region (single layer region) of the display panel and the transparent sheet is realized, even if the transparent sheet 300 shrinks under a high temperature condition, because the contact area between the extension part 210 of the transparent sheet 200 and the conductive metal layer 300 is large, the situation that the upper polarized light and the conductive silver paste for electrostatic discharge are separated in a conventional design can not occur, and the situation that static electricity cannot be connected with the conductive silver paste through the conductive layer glue of the upper polarizer and further cannot be conducted away through the grounding connection end can be avoided.
The embodiment of the invention also provides a display device, which comprises the display module.
With reference to fig. 2 and 8, a display device using the display module according to an embodiment of the present invention will be understood by those skilled in the art and will not be described in detail herein.
It should be noted that, alternatively, In the embodiment of the present invention, the display device may be a display device with a TTDI or In-cell structure.
The embodiment of the invention also provides a preparation method applied to the display module, which comprises the following steps:
preparing a display panel, wherein a grounding connection end is arranged on a connection area of the display panel;
coating a conductive metal layer on the connection region, and connecting the conductive metal layer with the ground connection terminal;
and covering the light-transmitting sheet including the extension part on the display panel, so that the orthographic projection of the extension part on the plane of the connection area is positioned on the connection area.
Optionally, the preparation method further includes, after the preparing the display panel:
coating a protective adhesive layer on the connecting area except the grounding connecting end;
and in the step of coating the conductive metal layer on the connection area, coating the conductive metal layer on the protective adhesive layer.
Optionally, the light-transmitting sheet is an upper polarizer of the display module.
With reference to fig. 2, fig. 3, fig. 4, and fig. 6 to fig. 8, the method for manufacturing a display module according to an embodiment of the present invention further includes, after the step of covering the light-transmitting sheet including the extending portion on the display panel:
the light-transmitting sheet and the cover plate are adhered together through the optical adhesive layer with the protruding part;
the lower polarizer is attached to the opposite side (non-light-emitting side) of the light-emitting surface of the array substrate.
With reference to fig. 2, fig. 3, fig. 4, fig. 6 to fig. 8 and the above detailed description, those skilled in the art should understand that the manufacturing process of the display module according to the embodiment of the present invention is not repeated herein.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (9)

1. A display module, comprising:
the display panel comprises a display area and a connecting area positioned outside the display area, wherein a grounding connecting end is arranged on the connecting area;
the light-transmitting sheet is positioned on the light emitting side of the display panel and comprises an extending part, and the extending part is positioned in the connecting area in the orthographic projection of the plane where the connecting area is positioned;
a conductive metal layer is filled between the extension part and the connection region, and the conductive metal layer is connected with the ground connection end;
the display panel comprises a color film substrate and an array substrate which are oppositely arranged, the color film substrate is arranged on the light emergent side of the array substrate, and the part of the array substrate, which extends and protrudes relative to the color film substrate, is formed into the connecting area;
the end face of the conductive metal layer, which is far away from the array substrate, and the end face of the color film substrate, which is far away from the array substrate, are positioned on the same plane;
the display panel is provided with a touch module in an integrated mode, the light-transmitting sheet is an upper polaroid, and the display module further comprises a lower polaroid located on the non-light-emitting side of the display panel.
2. The display module of claim 1, wherein the ground connection end is located within a coverage of the orthographic projection on the connection area.
3. The display module assembly of claim 1, wherein the display module assembly further comprises:
the driving chip is arranged on the connecting area; the two opposite sides of the driving chip along a preset direction are respectively provided with the grounding connecting ends on the connecting area;
the conductive metal layer comprises two sub-parts which are respectively positioned at two opposite sides of the driving chip along the preset direction, and each sub-part is respectively connected with the grounding connection end at the side.
4. The display module according to claim 3, wherein an orthographic projection of the extension portion on the plane of the connection region covers an orthographic projection of the two sub-portions on the plane of the connection region, and the extension portion does not overlap with an orthographic projection of the driving chip on the plane of the connection region.
5. The display module assembly of claim 1, wherein the display module assembly further comprises:
a cover plate covering the light emitting side of the light transmitting sheet;
the cover plate is connected with the light-transmitting sheet through an optical adhesive layer, and the orthographic projection of the optical adhesive layer on the plane where the light-transmitting sheet is located comprises a part overlapped with the extending part.
6. The display module of claim 5, wherein an orthographic projection of the optical adhesive layer on a plane of the transparent sheet overlaps the entire transparent sheet.
7. A display device, comprising the display module set of any one of claims 1 to 6.
8. A preparation method applied to the display module of any one of claims 1 to 6, wherein the method comprises the following steps:
preparing a display panel, wherein a grounding connection end is arranged on a connection area of the display panel;
coating a conductive metal layer on the connection region, and connecting the conductive metal layer with the ground connection terminal;
and covering the light-transmitting sheet including the extension part on the display panel, so that the orthographic projection of the extension part on the plane of the connection area is positioned on the connection area.
9. The method according to claim 8, further comprising, after the preparing the display panel:
coating a protective adhesive layer on the connecting area except the grounding connecting end;
and in the step of coating the conductive metal layer on the connection area, coating the conductive metal layer on the protective adhesive layer.
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